☆ 4.8 Review

Metal Sites in Zeolites: Synthesis, Characterization, and Catalysis

CHEMICAL REVIEWS (2023)

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Article Chemistry, Multidisciplinary

Enhanced Selectivity and Stability of Finned Ferrierite Catalysts in Butene Isomerization

Heng Dai et al.

Summary: Designing zeolite catalysts with improved mass transport properties is essential for networks with one- or two-dimensional pore topologies. Introducing fins can significantly enhance catalyst lifetime and selectivity, with confirmation of identical crystallographic registry between fins and seeds. Time-resolved titration of acid sites verifies the improved mass transport properties of ferrierite with fins compared to conventional analogues.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

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Article Chemistry, Multidisciplinary

Increasing the Number of Aluminum Atoms in T3 Sites of a Mordenite Zeolite by Low-Pressure SiCl4 Treatment to Catalyze Dimethyl Ether Carbonylation

Rongsheng Liu et al.

Summary: Selective relocation of aluminum atoms in mordenite framework can generate and intensify active sites in zeolite, improving selectivity and lifetime of catalytic reactions.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

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Article Engineering, Environmental

Relating the performances of selective phenol hydrogenation with encapsulated palladium nanoparticles and surrounding distinct LTL-zeolite microenvironments

Cun Liu et al.

Summary: By modulating the acidic/basic properties and metal nanoparticle microenvironment of the Pd@L catalyst, the catalytic performance for the selective phenol hydrogenation can be effectively controlled, leading to increased selectivity and yield of cyclohexanone.

CHEMICAL ENGINEERING JOURNAL (2022)

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Review Chemistry, Multidisciplinary

Selective Oxidation of Methane into Methanol Under Mild Conditions

Liu Yifeng et al.

Summary: Selective oxidation of methane to methanol has been a dream reaction, but faces challenges due to the strong C-H bond and easy overoxidation of the methanol product. Strategies using oxidants such as hydrogen peroxide and a mixture of oxygen and hydrogen have been developed to improve methanol productivity at mild temperatures. Effective catalysts, including supported metal nanoparticles, colloidal metal nanoparticles, and metal@zeolites, have shown significant achievements. The zeolite fixed metal nanoparticle structure has been found to enhance the reaction by facilitating the formation and enrichment of peroxide intermediates, which could guide the development of more efficient catalysts.

CHEMICAL RESEARCH IN CHINESE UNIVERSITIES (2022)

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Review Energy & Fuels

Hierarchical zeolite for biomass conversion to biofuel: A review

St Mardiana et al.

Summary: The development of biofuel production from biomass is promising, with zeolites emerging as suitable materials for catalyzing biomass conversion. However, the diffusion limitation issues caused by the micropores in zeolites can be addressed by developing hierarchical porosity. Research on hierarchical zeolite catalysts is continuously growing to enhance their performance.

FUEL (2022)

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Article Chemistry, Physical

Tandem catalysis with double-shelled hollow spheres

Jiadong Xiao et al.

Summary: A new synthesis method for metal oxide-zeolite double-shelled hollow spheres is proposed, demonstrating superior catalytic performance in producing a variety of products without the need for separating or purifying intermediates. This research is expected to advance the rational synthesis and study of hierarchically hollow, core-shell, multifunctional catalyst materials.

NATURE MATERIALS (2022)

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Article Chemistry, Physical

Recognizing the Important Role of Surface Barriers in MOR Zeolite Catalyzed DME Carbonylation Reaction

Kaipeng Cao et al.

Summary: The presence of surface barriers in zeolites plays a crucial role in governing their catalytic performance, affecting both activity and stability of the catalyst. Chemical etching of the outer layer of zeolite crystals has been proven to be an effective strategy to reduce surface barriers, enhance mass transport properties, and improve the activity and stability of the catalyst. This work highlights the importance of controlling synthetic strategy and surface barriers on zeolite crystals for designing highly efficient catalysts.

ACS CATALYSIS (2022)

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Article Chemistry, Physical

Boosting Propane Dehydrogenation over PtZn Encapsulated in an Epitaxial High-Crystallized Zeolite with a Low Surface Barrier

Bofeng Zhang et al.

Summary: Metal clusters encapsulated in nanosized zeolites exhibit higher specific activity in propane dehydrogenation due to shorter diffusion length and higher surface permeability, which are achieved by the epitaxial highly crystallized zeolite structure.

ACS CATALYSIS (2022)

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Article Chemistry, Physical

Enhanced Catalytic Performance through In Situ Encapsulation of Ultrafine Ru Clusters within a High-Aluminum Zeolite

Jiangqian Yang et al.

Summary: This study successfully encapsulated nanoscale Ru clusters within high-aluminum ZSM-5 zeolite, which is of great significance for the rational design and development of zeolitic bifunctional catalysts.

ACS CATALYSIS (2022)

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Article Chemistry, Physical

High-loading Ga-exchanged MFI zeolites as selective and coke-resistant catalysts for nonoxidative ethane dehydrogenation

Mengwen Huang et al.

Summary: This paper investigated the effects of different Ga species generated in Ga-MFIs on the catalytic activity for ethane dehydrogenation. The formation of [GaH2]+ ions under high loading and high-temperature treatment conditions was found to enhance the selectivity and durability of Ga-MFIs.

CATALYSIS SCIENCE & TECHNOLOGY (2022)

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Review Chemistry, Physical

Titanosilicate Epoxidation Catalysts: A Review of Challenges and Opportunities

Valentin Smeets et al.

Summary: Epoxidation reactions are crucial for modern chemistry, with Ti-based titanosilicate catalysts playing a central role in driving more versatile, high-performing, and greener processes. Challenges include improving catalyst performance through better control of active surface species and optimizing particle size, shape, and surface chemistry. Future research directions aim to broaden the application scope of new catalytic materials and enhance catalyst performance.

CHEMCATCHEM (2022)

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Article Chemistry, Multidisciplinary

Tailoring Porosity and Titanium Species of TS-1 Zeolites via Organic Base-assisted Sequential Post-treatment

Wenjing Xu et al.

Summary: Preparation of hierarchical TS-1 zeolite with extra-large external surface area and highly active octahedral-coordinated Ti species was achieved through organic base-assisted sequential post-treatment. The catalyst showed significantly higher turnover number in epoxidation reaction compared to the untreated conventional microporous TS-1 parent. The study revealed the effects of different treatment steps on the zeolite structure and Ti species preparation, providing theoretical guidance for enhancing catalytic activity of TS-1 zeolite.

CHEMICAL RESEARCH IN CHINESE UNIVERSITIES (2022)

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Review Chemistry, Multidisciplinary

Recent Advances of Beta Zeolite in the Volatile Organic Compounds(VOCs) Elimination by the Catalytic Oxidations

Dajun Cheng et al.

Summary: Volatile organic compounds (VOCs), with their volatility, toxicity, and diffusivity, have become a serious threat to human health and the environment. Catalytic complete oxidation is considered an efficient strategy for VOCs treatment, and Beta zeolites have garnered attention as superior catalysts due to their unique structure and catalytic properties. This review systematically summarizes the progress and development of Beta zeolite-based catalysts in the complete oxidation of VOCs over the past two decades.

CHEMICAL RESEARCH IN CHINESE UNIVERSITIES (2022)

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Article Chemistry, Multidisciplinary

Ethanol Conversion to C(4+)Olefins over Bimetallic Copper- And Lanthanum-Containing Beta Zeolite Catalysts

Michael J. Cordon et al.

Summary: Cu-La/Beta catalyst shows high selectivity and efficiency in ethanol conversion to C4+olefins, favoring C5+olefin formation, while monometallic Cu/Beta or La/Beta samples are unable to efficiently catalyze the desired product formation.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2022)

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Article Chemistry, Multidisciplinary

Homogeneous-like Alkyne Selective Hydrogenation Catalyzed by Cationic Nickel Confined in Zeolite

Xin Deng et al.

Summary: This study demonstrates that coordinatively unsaturated Ni(II) sites confined in faujasite zeolite, Ni@Y, can efficiently catalyze the selective hydrogenation of various alkynes, shedding light on the design of robust catalysts and new catalytic routes by linking heterogeneous and homogeneous catalysis.

CCS CHEMISTRY (2022)

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Review Chemistry, Multidisciplinary

Zeolite nanosheets for catalysis

Xiangyu Wang et al.

Summary: Zeolites with well-defined micropores are widely used as heterogeneous catalysts, but their catalytic performances are often limited by diffusion constraints. Synthesizing zeolite nanosheets is an efficient method to shorten the diffusion pathway and eliminate the constraints. This tutorial review discusses the recent progresses in the synthesis of zeolite nanosheets and their catalysis, providing significant insights for designing and preparing highly efficient zeolite catalysts.

CHEMICAL SOCIETY REVIEWS (2022)

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Review Chemistry, Multidisciplinary

Recent advance in synthesis and application of heteroatom zeolites

Tingting Pang et al.

Summary: Incorporation of heteroatoms into zeolite frameworks is a significant strategy to enhance their performance in catalysis and adsorption. Various synthesis methods have been developed for different heteroatom zeolites, which show promise in diverse fields such as producing fine chemicals, controlling air pollution, and converting biomass. However, challenges remain in the low-cost preparation and practical application of heteroatom zeolites.

CHINESE CHEMICAL LETTERS (2021)

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Review Chemistry, Multidisciplinary

Encapsulated Metal Nanoparticles for Catalysis

Chuanbo Gao et al.

Summary: Encapsulating metal nanoparticles in nanoshells or nanopores is a promising strategy to enhance stability and selectivity, taking advantage of the synergy between the metal nanoparticles and encapsulating materials. This approach also allows for improved catalytic properties and enables tandem catalysis in various applications.

CHEMICAL REVIEWS (2021)

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Article Chemistry, Physical

Highly monodisperse sub-nanometer and nanometer Ru particles confined in alkali-exchanged zeolite Y for ammonia decomposition

Junyoung Cha et al.

Summary: The study investigated the preparation method and catalytic performance of nanometer-sized Ru particles deposited on four different alkali-exchanged zeolite Y supports. The results showed that Ru/Rb-Y exhibited the highest catalytic activity, mainly attributed to the high basicity of Rb-Y zeolite and the confined dispersion of Ru particles, which led to an open pore structure of the zeolite.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

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Article Biochemical Research Methods

Tutorial: structural characterization of isolated metal atoms and subnanometric metal clusters in zeolites

Lichen Liu et al.

Summary: This protocol presents the use of STEM technique for structural characterization of subnanometric metal species encapsulated in zeolite. The method combines computational modeling and imaging techniques to determine the location of metal species within the zeolite framework. Additionally, the combination of spectroscopy techniques as complementary tools is mentioned to provide a comprehensive understanding of spatial distributions. These structural insights offer guidelines for the design of uniform metal-zeolite materials for catalytic applications.

NATURE PROTOCOLS (2021)

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Review Nanoscience & Nanotechnology

Confining isolated atoms and clusters in crystalline porous materials for catalysis

Lichen Liu et al.

Summary: This review discusses the impact of confining subnanometric metal species in zeolites and metal-organic frameworks on their geometric and electronic structures, as well as catalytic performance. It also highlights the potential of the interaction between metal species and porous frameworks in modulating the properties of subnanometric metal species. Future research directions in this area are proposed for further exploration.

NATURE REVIEWS MATERIALS (2021)

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Review Chemistry, Multidisciplinary

Advances in Catalytic Applications of Zeolite-Supported Metal Catalysts

Qiming Sun et al.

Summary: Zeolite-supported metal catalysts have shown superior activity and thermal stability in catalytic reactions, being widely applied in hydrogenation, dehydrogenation, oxidation, and other reactions, with promising prospects for future advancements.

ADVANCED MATERIALS (2021)

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Article Chemistry, Physical

Water: A promoter of ammonia selective catalytic reduction over copper-exchanged LTA zeolites

Yang Liu et al.

Summary: Water facilitates the migration of copper ions within high-silica Cu-LTA zeolite and enhances the low-temperature SCR activity of the catalyst, potentially tuning active sites and reaction pathways for more effective nitrogen oxides removal.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

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Article Chemistry, Physical

Highly selective Sn/HZSM-5 catalyst for ethane ammoxidation to acetonitrile and ethylene

Tingyu Liang et al.

Summary: The Sn-modified ZSM-5 catalyst exhibits high selectivity for ethane ammoxidation, with Sn (IV) cations identified as the critical active sites for acetonitrile formation, while the presence of nanosized SnOx particles favors CO2 formation. The surface abundancy of reaction intermediates differs between Sn/HZSM-5 and Co/HZSM-5, potentially explaining the enhanced selectivity of Sn (IV) cations over Co (II) cations.

APPLIED CATALYSIS A-GENERAL (2021)

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Article Chemistry, Physical

Control of Ti active-site microenvironment in titanosilicate catalysts and its effect on oxidation pathways

Yunkai Yu et al.

Summary: Different types of Ti active sites in titanosilicates have varying effects on oxidation pathways, where acid treatment can alter the properties of Ti active sites, and alkali treatment can increase the density of Si-OH groups, enhancing the activation of H2O2 and stability of Ti-OOH species.

APPLIED CATALYSIS A-GENERAL (2021)

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Article Chemistry, Physical

Subnanometric Pt on Cu Nanoparticles Confined in Y-zeolite: Highly-efficient Catalysts for Selective Catalytic Reduction of NOx by CO

Liang Li et al.

Summary: CO selective catalytic reduction (CO-SCR) technology is effective in removing harmful CO and NO in exhaust gases. The newly developed Pt-Cu catalyst showed enhanced catalytic performance at an extremely low Pt content, achieving full NO conversion at 250 degrees C, highlighting the synergistic catalysis of Pt and Cu for improved efficiency.

CHEMCATCHEM (2021)

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Article Chemistry, Physical

Tandem Reduction-Reoxidation Augments the Catalytic Activity of Sn-Beta Zeolites by Redispersion and Respeciation of SnO2 Clusters

Elise Peeters et al.

Summary: This study focuses on enhancing catalytic activity in Sn beta catalysts with Sn loadings up to 10 wt % through tandem reduction-reoxidation, and explores the impact on Lewis acid density, Sn dispersion, Sn speciation, and catalytic performance. Characterization of different samples reveals that higher catalytic activity may result from redispersion of SnO2 clusters at lower Sn content (<5 wt %) and respeciation of SnO2 clusters at higher Sn content (>= 5 wt %).

CHEMISTRY OF MATERIALS (2021)

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Article Chemistry, Physical

Regulation of Al distributions and Cu2+ locations in SSZ-13 zeolites for NH3-SCR of NO by different alkali metal cations

Wenting Lv et al.

Summary: Different types of alkali metal cations were used to synthesize SSZ-13, and the Al distribution and Cu2+ locations in the framework were investigated using various techniques. It was found that with decreasing cation radii, the number of AlO4- tetrahedra and isolated Cu2+ species in SSZ-13 increased, leading to enhanced NH3-SCR catalytic performance.

JOURNAL OF CATALYSIS (2021)

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Article Chemistry, Applied

Topotactic conversion of Ge-rich IWW zeolite into IPC-18 under mild condition

Kun Lu et al.

Summary: The successful structural conversion process from Ge-rich IWW-type germanosilicate to IPC-18 zeolite under mild conditions of water medium and room temperature demonstrated promising catalytic performance in the hydration of ethylene oxide to ethylene glycol with a high selectivity of 96%.

MICROPOROUS AND MESOPOROUS MATERIALS (2021)

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Article Chemistry, Inorganic & Nuclear

Promotion Effect of the X-Zeolite Host on Encapsulated Platinum Clusters for Selective Hydrogenation of Phenylacetylene to Styrene

Zhiyang Zhang et al.

Summary: The study reports the promotion effect of the zeolitic inner host on the catalytic performance of encapsulated platinum nanoclusters, leading to increased turnover frequency, higher selectivity, and improved stability of Pt@X-zeolite in the reaction of phenylacetylene semihydrogenation to styrene. The excellent performance of Pt@X-zeolite is attributed to the promotion of the zeolitic framework on encapsulated Pt clusters, resulting in electron-deficient Pt clusters with stronger interaction with phenylacetylene, regulating adsorption and enhancing selectivity.

INORGANIC CHEMISTRY (2021)

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Article Multidisciplinary Sciences

Directed transforming of coke to active intermediates in methanol-to-olefins catalyst to boost light olefins selectivity

Jibin Zhou et al.

Summary: The study demonstrates a method of converting coke to active intermediates through steam cracking to simultaneously recover catalyst activity and boost light olefins selectivity in the MTO process.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Physical

Alkene Epoxidations with H2O2 over Groups 4-6 Metal-Substituted BEA Zeolites: Reactive Intermediates, Reaction Pathways, and Linear Free-Energy Relationships

E. Zeynep Ayla et al.

Summary: Rates and selectivities for alkene epoxidations are sensitive to the identity of the active metal center, with Ti-BEA exhibiting significantly higher catalytic efficiency compared to Nb-BEA and W-BEA. The effects of metal identity on catalytic epoxidation were determined using complementary experimental methods, showing distinct kinetic regimes and differences in activation enthalpies for different metal-BEA catalysts. Linear free-energy relationships hold for these systems, despite differences in metal coordination, oxygen species, and solvent presence.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

TS-1 zeolite with homogeneous distribution of Ti atoms in the framework: synthesis, crystallization mechanism and its catalytic performance

Zhen Chen et al.

Summary: The homogeneous distribution of titanium atoms in TS-1 zeolite (BUS-TS-1) synthesized under high basicity conditions through a bottom-up strategy leads to better catalytic performance for both olefin and alkane oxidation. Gripper-like silicon species can condense with Ti-OH to form stable Si-O-Ti species, ensuring the phase transfer rates match during crystallization and result in the uniform distribution of Ti atoms. This work offers a useful strategy for synthesizing high-performance catalysts by regulating the distribution of Ti active sites within the TS-1 framework.

JOURNAL OF CATALYSIS (2021)

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Article Chemistry, Physical

Identification and quantification of distinct active sites in Hf-Beta zeolites for transfer hydrogenation catalysis

Blake A. Johnson et al.

Summary: This study developed a new method using infrared spectroscopy to reliably quantify the existence of framework Lewis acidic Hf4+ sites in Beta zeolites. The method was successfully validated in Sn-Beta and Hf-Beta zeolites, providing crucial data support for further research on the activity of Lewis acidic zeolites.

JOURNAL OF CATALYSIS (2021)

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Review Multidisciplinary Sciences

Selective catalytic reduction of NOx with NH3: opportunities and challenges of Cu-based small-pore zeolites

Yulong Shan et al.

Summary: This review article summarizes the major advances of Cu-SSZ-13 in the NH3-SCR reaction, including insights into the matching between SCR catalyst design principles and the characteristics of Cu2+-exchanged zeolitic catalysts. It proposes principles for designing zeolites with excellent performance and stability, while also addressing the challenges faced by Cu-based small-pore zeolites.

NATIONAL SCIENCE REVIEW (2021)

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Article Chemistry, Multidisciplinary

Zeolite-Stabilized Di- and Tetranuclear Molybdenum Sulfide Clusters Form Stable Catalytic Hydrogenation Sites

Roland Weindl et al.

Summary: Supercages of FAU-type zeolites provide a robust scaffold for stabilizing molybdenum sulfide clusters, leading to stable catalytic activity for ethene hydrogenation. The Mo4S4 clusters trapped within the FAU structure have a distorted cubane structure similar to the FeMo-cofactor in nitrogenase, and both clusters exhibit identical catalytic activity per sulfide cluster. Additionally, these FAU-encaged clusters show superior stability compared to layered MoS2 structures under the same reaction conditions.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

Dual Active Sites on Molybdenum/ZSM-5 Catalyst for Methane Dehydroaromatization: Insights from Solid-State NMR Spectroscopy

Wei Gao et al.

Summary: This study identified proximate dual active sites on Mo/ZSM-5 catalyst, revealing the crucial role of spatial interaction between Bronsted acid sites and Mo species in methane conversion and aromatics formation. The evolution of olefins and aromatics in Mo/ZSM-5 channels was monitored, showing the intermediate role of olefins in the hydrocarbon pool process during the MDA reaction.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

Selective Formation of α-Fe(II) Sites on Fe-Zeolites through One-Pot Synthesis

Max L. Bols et al.

Summary: This study presents a method for preparing highly active alpha-Fe(II) sites by introducing Fe(III) during hydrothermal synthesis and treating appropriately. The effect of iron on zeolite crystallization was investigated, and intermediate iron species were tracked using various spectroscopy techniques.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Chemistry, Multidisciplinary

Open Nonporous Nonasil Zeolite Structure for Selective Catalysis

Kun Lu et al.

Summary: A novel bottom-up structural construction strategy was proposed to convert Nonasil zeolite into two novel structures with accessible and stable acid sites, making it a promising catalyst for the 1-butene cracking to lower alkenes.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Chemistry, Multidisciplinary

Propane Dehydrogenation Catalyzed by Isolated Pt Atoms in SiOZn-OH Nests in Dealuminated Zeolite Beta

Liang Qi et al.

Summary: This study presents a novel strategy for the design, synthesis, and characterization of a zeolite-supported propane dehydrogenation catalyst with predominantly isolated Pt atoms stably bonded within nests of Zn atoms. The catalyst exhibits high activity and selectivity to propene, and atomic resolution images confirm the predominantly atomic dispersion of Pt in the nests.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Chemistry, Multidisciplinary

Pinpointing and Quantifying the Aluminum Distribution in Zeolite Catalysts Using Anomalous Scattering at the Al Absorption Edge

Ana B. Pinar et al.

Summary: Resonant X-ray powder diffraction technique is used to accurately determine the distribution of aluminum in different zeolite catalysts, leading to a better understanding of the relationship between zeolite structure and catalytic activity.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Chemistry, Physical

Toward Controlling Disassembly Step within the ADOR Process for the Synthesis of Zeolites

Jin Zhang et al.

Summary: The application of the ADOR protocol in the synthesis of germanosilicate zeolites allows for the preparation of previously unknown isoreticular zeolites with tunable building units. Control over key ADOR processes can regulate the structure of the zeolites and adjust pore size, providing a new tool for design and synthesis.

CHEMISTRY OF MATERIALS (2021)

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Article Engineering, Chemical

Mechanochemical Approach to Preparation of MFI Zeolites Substituted Isomorphously by Both Al and Fe as Durable Catalysts for the Dimethyl Ether to Olefin Reaction

Mizuho Yabushita et al.

Summary: The zeolites with an MFI-type framework topology containing both Al and Fe atoms were prepared via a two-step mechanochemically assisted method. Compared to zeolites prepared via the conventional one-pot hydrothermal process using homogeneous reagents, the thus-prepared [Al, Fe]-MFI zeolites exhibited a longer catalyst lifetime in the catalytic conversion of dimethyl ether into light olefins due to better homogeneity of Fe atoms in the zeolite catalyst achieved by the mechanochemically assisted method.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2021)

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Review Engineering, Chemical

Review on Hydrodesulfurization over Zeolite-Based Catalysts

Tian-You Cui et al.

Summary: Zeolite-based HDS catalysts play a crucial role in alleviating the removal of refractory sulfur compounds through isomerization and cracking abilities. These catalysts can improve HDS efficiency and reduce coke formation, leading to better selectivity in the process.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2021)

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Article Chemistry, Physical

Hydrodeoxygenation of guiacol over ion-exchanged ruthenium ZSM-5 and BEA zeolites

Penghui Yan et al.

Summary: Ion-exchanged Ru/ZSM-5 and Ru/BEA catalysts show high intrinsic HDO activity with finely dispersed metal particles interacting strongly with oxygen atoms. High H2 adsorption activity facilitates hydrogenation reaction, while acid sites play a pivotal role in deoxygenation reaction.

JOURNAL OF CATALYSIS (2021)

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Article Chemistry, Physical

Identification of atomically dispersed Fe-oxo species as new active sites in HZSM-5 for efficient non-oxidative methane dehydroaromatization

Yuebing Xu et al.

Summary: The Fe2+-exchanged HZSM-5 catalyst prepared by ion exchange with stable, soluble, and divalent Fe salt FeSO4 showed significantly higher aromatics formation activity and selectivity at a CH4 conversion of around 15% compared to other Fe/HZSM-5 catalysts. The atomically dispersed Fe-oxo species anchored at framework Al sites were found to be responsible for selectively activating CH4 into CHx species for aromatics' formation. This Fe-based HZSM-5 catalyst demonstrated better catalytic performance due to the ion-exchange method with FeSO4 as the precursor.

JOURNAL OF CATALYSIS (2021)

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Article Chemistry, Physical

Enhanced performances of bimetallic Ga-Pt nanoclusters confined within silicalite-1 zeolite in propane dehydrogenation

Yansu Wang et al.

Summary: Bimetallic Ga-Pt nanocatalysts encapsulated into silicalite-1 zeolites were synthesized for propane dehydrogenation, showing high activity, selectivity, and stability. The confined GaPt alloy nanoclusters act as active sites, exhibiting a high propene selectivity and formation rate. The zeolite encapsulation enhances regeneration stability, maintaining catalytic activity over multiple cycles.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2021)

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Article Chemistry, Multidisciplinary

Impregnating Subnanometer Metallic Nanocatalysts into Self-Pillared Zeolite Nanosheets

Ning Wang et al.

Summary: Supported metal catalysts prepared using impregnation method often suffer from poor dispersion and thermal stability. In this study, it was demonstrated that self-pillared MFI zeolite nanosheets are ideal supports for immobilizing ultrasmall metal clusters, exhibiting excellent catalytic performance in various reactions.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Chemistry, Physical

Highly-Dispersed Zinc Species on Zeolites for the Continuous and Selective Dehydrogenation of Ethane with CO2 as a Soft Oxidant

Jiaxu Liu et al.

Summary: This study presents the preparation, characterization, and catalytic performance of heterogeneous catalysts with highly dispersed zinc sites on zeolitic materials for the CO2-assisted oxidative ethane dehydrogenation reaction. The selective reactivity of the catalyst is attributed to the compositional structure and topology of the support.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

Splitting Dioxygen over Distant Binuclear Fe Sites in Zeolites. Effect of the Local Arrangement and Framework Topology

Edyta Tabor et al.

Summary: This study demonstrates the potential of distant binuclear cationic Fe(II) centers in Fe-ferrierite for dioxygen activation, enabling the oxidation of methane to methanol at room temperature. Fe(II) sites stabilized in various zeolite matrices also exhibit similar activity, suggesting a possibility for developing Fe-zeolite-based systems for direct oxidations.

ACS CATALYSIS (2021)

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Review Chemistry, Physical

Oxidative Dehydrogenation of Propane to Propylene with Soft Oxidants via Heterogeneous Catalysis

Xiao Jiang et al.

Summary: Oxidative dehydrogenation of propane to propylene can be achieved using conventional oxygen-assisted dehydrogenation or soft oxidants. Soft oxidants play important roles in inhibiting overoxidation and improving propylene selectivity. Significant efforts have been focused on developing different catalysts with recent emphasis on halogens and hydrogen halides for ODHP processes.

ACS CATALYSIS (2021)

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Article Chemistry, Applied

Fischer-Tropsch reaction within zeolite crystals for selective formation of gasoline-ranged hydrocarbons

Chengtao Wang et al.

Summary: This study presents a strategy for optimizing gasoline selectivity by fixing metal nanoparticles within zeolite crystals, which overcomes the ASF limitation and offers a potential route for the direct transformation of syngas to liquid fuels with controllable selectivities.

JOURNAL OF ENERGY CHEMISTRY (2021)

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Review Chemistry, Multidisciplinary

Direct aromatization of CO2 via combined CO2 hydrogenation and zeolite-based acid catalysis

Iman Nezam et al.

Summary: This review discusses recent advances in the direct hydrogenation of CO2 to aromatics via heterogeneous catalysis, focusing on the design and deployment of tandem catalysts, key parameters affecting catalytic performance, as well as thermodynamic analyses, mechanistic studies, and DFT computations for understanding CO2 activation, reaction intermediates, and product formation. Challenges and prospects for these tandem reactions are also addressed to provide suggestions for future research.

JOURNAL OF CO2 UTILIZATION (2021)

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Article Multidisciplinary Sciences

Selectivity descriptors for the direct hydrogenation of CO2 to hydrocarbons during zeolite-mediated bifunctional catalysis

Adrian Ramirez et al.

Summary: Cascade processes in heterogeneous catalysis show promise for one-step valorization of C1-feedstocks. The combination of metal-based catalysts and zeolites provides product selectivity control, but mechanistic understanding remains unclear. Active zeolite catalysts' topology and hybrid nature are crucial in regulating reaction mechanism and product selectivity.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Physical

Unravelling Phosphorus-Induced Deactivation of Pd-SSZ-13 for Passive NOx Adsorption and CO Oxidation

Dongdong Chen et al.

Summary: This study demonstrates that phosphorus (P) originating from lubricant oil additives or biofuels can lead to severe deactivation of Pd-SSZ-13 zeolites in automotive exhaust after-treatment systems. The loss of isolated Pd sites, specifically [Pd(OH)]+ and Pd2+, due to P-poisoning was found to be the primary reason for deactivation. In situ studies suggest that [Pd(OH)]+ is more susceptible to P-poisoning than Pd2+, leading to migration of [Pd(OH)]+ to the zeolite surface and subsequent formation of inactive metaphosphate and bulk PdOx species.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

Suppressing C-C Bond Dissociation for Efficient Ethane Dehydrogenation over the Isolated Co(II) Sites in SAPO-34

Yuebing Xu et al.

Summary: The study found that ionic-state -Co-O- species are favorable for suppressing C-C bond scission in ethane dehydrogenation, while reduced Co clusters promote both C-H and C-C bond scissions. Co-based SAPO-34 catalysts prepared by different methods show variations in selectivity and stability in the reaction.

ACS CATALYSIS (2021)

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Review Chemistry, Multidisciplinary

Structural transformations of solid electrocatalysts and photocatalysts

Lichen Liu et al.

Summary: Heterogeneous catalysts often undergo structural transformations during thermal, electrocatalytic, and photocatalytic reactions, affecting the properties of active sites. While structural transformations of photocatalysts and electrocatalysts have been observed in operando, the implications for catalytic behavior are not fully understood yet. Understanding the evolution of solid thermal catalysts can provide insights into emerging research in photocatalysis and electrocatalysis.

NATURE REVIEWS CHEMISTRY (2021)

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Review Chemistry, Multidisciplinary

Zeolite Fixed Metal Nanoparticles: New Perspective in Catalysis

Yeqing Wang et al.

Summary: Loading metal nanoparticles within zeolite crystals provides advantages of high activity, shape selectivity, and stability, addressing the shortcomings of traditional supported metal nanoparticles. The combination of metal nanoparticles and zeolites in metal@zeolite catalysts offers enhanced catalytic performance by facilitating reactant diffusion, adjusting adsorption, and sieving reactants and products in zeolite micropores. Optimizing wettability and microporous confinement in zeolites further improves efficiency and productivity in catalytic reactions, making these catalysts promising for industrial applications and fundamental catalytic research.

ACCOUNTS OF CHEMICAL RESEARCH (2021)

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Article Nanoscience & Nanotechnology

Subsurface-Regulated PtGa Nanoparticles Confined in Silicalite-1 for Propane Dehydrogenation

Bofeng Zhang et al.

Summary: Propane dehydrogenation (PDH) is a promising technique to produce propylene, but Pt-based catalysts often suffer from stability issues. This study investigated the surface and subsurface composition of supported PtGa nanoparticles and demonstrated that subsurface regulation can enhance propylene selectivity. Furthermore, PtGa alloy nanoparticles encapsulated in MFI zeolite showed enhanced catalytic stability.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Article Nanoscience & Nanotechnology

Zeolite-Encapsulated Ultrasmall Cu/ZnOx Nanoparticles for the Hydrogenation of CO2 to Methanol

Wen-Gang Cui et al.

Summary: The study reports a core-shell structured catalyst to enhance the efficiency and stability of CO2 selective hydrogenation to methanol.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Article Chemistry, Multidisciplinary

Spontaneous Pillaring of Pentasil Zeolites

Rishabh Jain et al.

Summary: Hierarchical zeolites can be prepared by using MEL- or MFI-type zeolites as crystalline seeds, avoiding the need for organic or branching templates. The mechanism involves heterogeneous nucleation and growth of sequentially branched nanosheets. These hierarchical zeolites show improved catalytic performance in Friedel-Crafts alkylation and methanol to hydrocarbons reactions.

ADVANCED MATERIALS (2021)

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Article Engineering, Chemical

PtZn intermetallic nanoalloy encapsulated in silicalite-1 for propane dehydrogenation

Bofeng Zhang et al.

Summary: The stable and high-yield PDH reaction was achieved by confining Pt-Zn intermetallic alloys in the channels of silicalite-1. The cooperation between spatially confined PtZn IMAs and lattice-confined Zn in the framework resulted in high propylene selectivity without noticeable deactivation, even after 90 hours at 600 degrees Celsius.

AICHE JOURNAL (2021)

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Article Chemistry, Multidisciplinary

Library Creation of Ultrasmall Multi-metallic Nanoparticles Confined in Mesoporous MFI Zeolites

Xiaoli Jia et al.

Summary: The development of materials integrated with ultrasmall multi-metal nanoparticles (UMMNs) and mesoporous zeolite is a significant challenge in chemistry and materials science. A novel trifunctional surfactant was designed to synthesize UMMNs confined in the zeolite matrix, exhibiting improved catalytic performance.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Physical

Effect of zeolite topology on NH3-SCR activity and stability of Cu-exchanged zeolites

Karolina A. Tarach et al.

Summary: The study evaluated the catalytic activity and stability of Cu-exchanged zeolites in NH3-SCR reaction, showing that the reaction mechanism involves [Cu(OH)(NH3)2(NO)](+) intermediates and reduction of Cu(II) to Cu(I). The differentiated speciation of copper sites plays a crucial role in determining the catalytic activity and stability of the zeolitic catalysts.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

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Article Chemistry, Physical

Remarkable performance of selective catalytic reduction of NOx by ammonia over copper-exchanged SSZ-52 catalysts

Rui Li et al.

Summary: The low-temperature catalytic performance of Cu-ion-exchanged SSZ-52 catalysts for the NH3-SCR of NOx was investigated, with Cu-2.4-SSZ-52 showing the highest activity and stability even after hydrothermal aging at 750 degrees C. The unique structure and cages of SSZ-52 are responsible for its excellent catalytic performance.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

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Article Chemistry, Physical

Efficient Synthesis of Monomeric Fe Species in Zeolite ZSM-5 for the Low-Temperature Oxidation of Methane

Tao Yu et al.

Summary: Direct oxidation of methane into value-added C1 oxygenated products remains a significant challenge in catalysis. Fe/ZSM-5 materials were prepared using three different methods, with solid-state ion-exchange method achieving the highest proportion of monomeric Fe species. This method resulted in excellent C1 oxygenates yield and selectivity at low temperature.

CHEMCATCHEM (2021)

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Review Chemistry, Physical

Atomic-Scale Designing of Zeolite Based Catalysts by Atomic Layer Deposition

Dan Xu et al.

Summary: Utilizing atomic layer deposition (ALD) to control the deposition sites of metals at the atomic scale is an important strategy for improving Zeolite-based catalysts. This review comprehensively summarizes the recent research in designing and engineering the structure of Zeolite-based catalysts via ALD method.

CHEMPHYSCHEM (2021)

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Article Energy & Fuels

Metal nanoparticles encapsulated within SOD zeolite coupling with HZSM-5 for hydrogenative conversion of methylcyclopentane

Ningyue Lu et al.

Summary: In this study, a novel bifunctional catalyst Pt@SOD + HZSM-5 was designed, which exhibited outstanding selectivity to C6-cyclic products in the hydrogenative conversion of methylcyclopentane (MCP) through combining spillover hydro/dehydrogenation and acid-catalyzed mechanism. Additionally, the Pt@SOD + HZSM-5 coupling catalyst showed excellent sulfur-tolerant ability.

FUEL (2021)

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Article Chemistry, Physical

Skeleton-Sn anchoring isolated Pt site to confine subnanometric clusters within *BEA topology

Yue Ma et al.

Summary: Utilizing framework-Sn in Beta zeolite to anchor guest platinum precursors, forming Pt@Sn-Beta confined Pt subnanometric clusters, can inhibit coke formation and sintering of ultrafine Pt clusters, achieving excellent stability in propane dehydrogenation.

JOURNAL OF CATALYSIS (2021)

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Article Chemistry, Physical

Direct Imaging and Location of Pb2+ and K+ in EMT Framework-Type Zeolite

Yaping Zhang et al.

Summary: The development of electron microscopy has enabled the direct observation of the structure and metal distribution within zeolites at an atomic level. Alternative image modes, such as annular bright field, have proven useful in extending spatial resolution and increasing sensitivity towards light elements. Additionally, combining atomic imaging with three-dimensional electron diffraction tomography analysis allowed the determination of the crystal symmetry of lead-EMT to be P6(3)mc.

JOURNAL OF PHYSICAL CHEMISTRY C (2021)

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Article Chemistry, Applied

Palladium confined in pure-silica TON zeolite for furfuryl alcohol hydrogenation into tetrahydrofurfuryl alcohol

Jingmin Lan et al.

Summary: In this study, highly dispersive Pd nanoparticles were successfully encapsulated within a pure silica zeolite matrix. The champion catalyst Pd-Si-ZSM-22 exhibited high catalytic efficiency with excellent selectivity and stability, making it a promising candidate for hydrogenation reactions.

MICROPOROUS AND MESOPOROUS MATERIALS (2021)

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Article Multidisciplinary Sciences

Isolated boron in zeolite for oxidative dehydrogenation of propane

Hang Zhou et al.

Summary: Isolated boron in a zeolite framework without B-O-B oligomers exhibits high activity and selectivity for oxidative dehydrogenation of propane (ODHP). The boron-silicon bonding structure hinders boron leaching in a humid atmosphere, enhancing catalyst durability. The -B[OH center dot center dot center dot O(H)-Si](2) structure in borosilicate zeolite serves as the active center for activating oxygen and carbon-hydrogen bonds to catalyze ODHP.

SCIENCE (2021)

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Article Chemistry, Physical

Yolk@Shell FeMn@Hollow HZSM-5 Nanoreactor for Directly Converting Syngas to Aromatics

Yanfei Xu et al.

Summary: A catalyst with FeMn nanoparticles as the yolk and hollow HZSM-5 zeolite as the shell was designed to achieve high space time yield (STY) for aromatics, outperforming previously reported catalytic systems significantly. The enhanced catalytic performance was attributed to the spatially and temporally ordered effect of the yolk@shell structure, which fully exploited the shape-selective effect and aromatization ability of HZSM-5 zeolite. The findings provided a strategy for constructing highly efficient multifunctional catalysts, which could be potentially applied to other tandem catalysis systems.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

Stable Cr-MFI Catalysts for the Nonoxidative Dehydrogenation of Ethane: Catalytic Performance and Nature of the Active Sites

Sudipta De et al.

Summary: This study reports a Cr-based catalyst for efficient ethane dehydrogenation to ethylene at low temperatures, with good stability and regeneration properties. Detailed analysis shows that using all-silica MFI zeolite as a support promotes the stability of the Cr catalyst, enhancing its coke resistance.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

Highly Dispersed Sn-beta Zeolites as Active Catalysts for Baeyer-Villiger Oxidation: The Role of Mobile, In Situ Sn(II)O Species in Solid-State Stannation

Elise Peeters et al.

Summary: Solid-state incorporation of Sn into beta zeolites is an efficient method to obtain Lewis acidic Sn beta catalysts with high activity. Preheating under an inert atmosphere prior to air-calcination results in Sn beta catalysts with the highest Sn dispersion and less extra-framework SnO2. In situ characterization reveals in situ generation of Sn(II)O species during pre-pyrolysis, enabling high Sn dispersion in Sn beta.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

Role of Bronsted Acid Sites within 8-MR of Mordenite in the Deactivation Roadmap for Dimethyl Ether Carbonylation

Zaizhe Cheng et al.

Summary: The study focuses on dissecting the role of BASs in the 8-MR and B12-MR in deactivation, revealing the contribution of B8-MR to coke formation. Through kinetic studies and various spectroscopic techniques, the predominant deactivation pathway during the early stage of DME carbonylation and the specific roles of BASs, especially in the 8-MR, were identified. This insight into the deactivation mechanism will provide inspiration for the further design and modification of robust zeolite catalysts associated with the carbonylation reaction.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

Effect of the Co-cation on Cu Speciation in Cu-Exchanged Mordenite and ZSM-5 Catalysts for the Oxidation of Methane to Methanol

Gordon Brezicki et al.

Summary: This study demonstrates that the identity of the co-cation (H vs Na) significantly influences the Cu speciation and reactivity in Cu-MOR and Cu-ZSM-S catalysts. The choice of co-cation can be used to control active site structure and affect the selectivity of methane conversion to methanol.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

Coordination and activation of nitrous oxide by iron zeolites

Max L. Bols et al.

Summary: This study isolated and characterized the N2O-ligated Fe(ii) active site in iron-exchanged zeolite beta using various spectroscopic techniques. The results showed that N2O binds through the terminal nitrogen atom with substantial backbonding from the Fe(ii) center at low temperatures, and weakens at higher temperatures, facilitating isomerization to the O-bound form which is competent in O-atom transfer. Density functional theory calculations provided insights into the geometric and electronic structure requirements for N2O binding and activation, highlighting the role of the zeolite lattice in activating N2O.

NATURE CATALYSIS (2021)

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Review Chemistry, Multidisciplinary

Confinement in a Zeolite and Zeolite Catalysis

Yuchao Chai et al.

Summary: Zeolites, with their ordered channels on the molecular scale, are intrinsic confined systems that play crucial roles in various fields. The structural confinement in zeolites can lead to unique chemical behaviors, affecting molecular diffusion and shape-selective catalysis. Understanding the nature of zeolite confinement from spatial and electronic perspectives is essential for their effective utilization in adsorption and catalysis.

ACCOUNTS OF CHEMICAL RESEARCH (2021)

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Article Engineering, Environmental

The promotion effect of niobium on the low-temperature activity of Al-rich Cu-SSZ-13 for selective catalytic reduction of NOx with NH3

Jingang Wang et al.

Summary: The addition of niobium (Nb) significantly enhances the low-temperature activity of Cu(2%)SSZ-13 catalyst without sacrificing N-2 selectivity and sulfur resistance. Niobium ions increase the number of active [Cu(OH)](+)Z sites and Lewis acid sites, promoting NH3 adsorption capacity and NOx conversion. Nb-0.7%/Cu(2%)SSZ-13 zeolite catalyst shows great potential as an NH3-SCR catalyst for NOx elimination in practical applications.

CHEMICAL ENGINEERING JOURNAL (2021)

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Review Chemistry, Multidisciplinary

Oxide-Zeolite-Based Composite Catalyst Concept That Enables Syngas Chemistry beyond Fischer-Tropsch Synthesis

Xiulian Pan et al.

Summary: The OXZEO catalyst concept enables high selectivity in the direct conversion of syngas to light olefins and ethylene, surpassing the theoretical limits of conventional FTS. It also allows the synthesis of gasoline-range isoparaffins and aromatic compounds. This concept demonstrates versatility and may serve as a technology platform for utilizing carbon resources to produce chemicals and fuels.

CHEMICAL REVIEWS (2021)

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Article Chemistry, Inorganic & Nuclear

Rhodium Encapsulated within Silicalite-1 Zeolite as Highly Efficient Catalyst for Nitrous Oxide Decomposition: From Single Atoms to Nanoclusters and Nanoparticles

Shiwei Wang et al.

Summary: The size of metal species in supported metal catalysts plays a crucial role in catalytic performance. Rh species encapsulated within silicalite-1 catalysts showed a range of sizes, from single atoms to nanoclusters and nanoparticles, affecting the turnover frequency of N2O decomposition. The structure-sensitive catalysis was found to be related to differences in N2O and O2 adsorption/desorption for various Rh species, with a Rh@S-1 catalyst with a proper Rh size identified as the best-performing catalyst.

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY (2021)

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Article Chemistry, Applied

Encapsulation Ni in HZSM-5 for catalytic hydropyrolysis of biomass to light aromatics

Xue-Yu Ren et al.

Summary: Ni@HZ5 and xNi/HZ5 zeolites were prepared and employed for hydroconversion of pyrolytic volatiles of spent coffee grounds into BTEXN. Ni@HZ5 showed superior selectivity for BTEXN production, with encapsulated metallic Ni species in the MFI-type framework playing a crucial role.

FUEL PROCESSING TECHNOLOGY (2021)

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Review Chemistry, Applied

Catalytic conversion of light alkanes to aromatics by metal-containing HZSM-5 zeolite catalysts-A review

Dongyang Liu et al.

Summary: This paper reviews the research progress of aromatization for light alkanes on HZSM-5 zeolites and its metal-containing catalysts, focusing on the introduction of metal species and dehydrogenation mechanisms to enhance the selectivity of BTX. The interaction of Zn or Ga with HZSM-5 zeolite forms Lewis acid sites, promoting the dehydrogenation of alkanes and intermediate products to increase BTX selectivity.

FUEL PROCESSING TECHNOLOGY (2021)

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Article Chemistry, Multidisciplinary

Exfoliated Ferrierite-Related Unilamellar Nanosheets in Solution and Their Use for Preparation of Mixed Zeolite Hierarchical Structures

Wieslaw J. Roth et al.

Summary: The direct exfoliation of layered zeolites into monolayers has been achieved for zeolite MCM-56 using soft-chemical treatment with TBAOH. The exfoliation of layers with ferrierite-related structure, denoted bifer, has also been successfully demonstrated and shown to have catalytic activity. The results highlight the potential for preparing zeolite composites with enhanced activity and functionality.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Chemistry, Multidisciplinary

What Is Being Measured with P-Bearing NMR Probe Molecules Adsorbed on Zeolites?

Carlos Bornes et al.

Summary: The study investigates the interaction mechanisms of the probe molecule trimethylphosphine oxide (TMPO) confined within HZSM-5 molecular-sized voids in zeolites, leading to a new understanding of acid properties. DFT and AIMD computations reveal the significant impact of framework aluminum atom siting on H-1 and P-31 NMR chemical shifts in solid acid catalysts. The findings challenge the current interpretation of NMR spectra and raise concerns about the use of probe molecules for studying acid sites in zeolites.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Nanoscience & Nanotechnology

Synergizing metal-support interactions and spatial confinement boosts dynamics of atomic nickel for hydrogenations

Jian Gu et al.

Summary: The synergistic effect of metal-support interactions and spatial confinement enhances the catalytic performance of highly loaded atomic nickel on a graphitic carbon nitride support, leading to improved coke inhibition and outstanding activity in hydrogenation reactions. This approach provides a pathway to design efficient, stable, and highly loaded atomically dispersed catalysts with superior catalytic performance compared to traditional metal nanoparticles.

NATURE NANOTECHNOLOGY (2021)

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Article Multidisciplinary Sciences

Dual-atom Pt heterogeneous catalyst with excellent catalytic performances for the selective hydrogenation and epoxidation

Shubo Tian et al.

Summary: The study successfully prepared a mesoporous graphitic carbon nitride-supported dual-atom Pt-2 catalyst, which displayed excellent catalytic performance in the hydrogenation of nitrobenzene to aniline reaction, with a conversion rate higher than that of other comparative catalysts. This catalyst also shows potential applications in other important reactions.

NATURE COMMUNICATIONS (2021)

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Article Multidisciplinary Sciences

Stabilizing the framework of SAPO-34 zeolite toward long-term methanol-to-olefins conversion

Liu Yang et al.

Summary: Studying the dynamic changes of SAPO-34 framework during MTO conversion, researchers found that pre-coking and water co-feeding can efficiently suppress T-O-T bond breakage during long-term continuous regenerations, thus promoting catalytic efficiency and long-term stability in commercial MTO processes.

NATURE COMMUNICATIONS (2021)

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Article Multidisciplinary Sciences

Identifying the key steps determining the selectivity of toluene methylation with methanol over HZSM-5

Qingteng Chen et al.

Summary: This study identifies the key steps in the methylation of toluene to produce p-xylene over a zeolite catalyst, with methylation being found as the rate-determining step. The research also highlights that the diffusion of m-xylene along the channel is more challenging than its isomerization to p-xylene, further enhancing the selectivity of p-xylene formation.

NATURE COMMUNICATIONS (2021)

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Article Multidisciplinary Sciences

Near 100% ethene selectivity achieved by tailoring dual active sites to isolate dehydrogenation and oxidation

Chaojie Wang et al.

Summary: Prohibiting deep oxidation of alkene in oxidative dehydrogenation of light alkane is important but challenging. The use of tailored dual active sites can achieve superior ethene selectivity. The introduction of HY zeolite with acid sites, three-dimensional pore structure, and supercages, along with Ni2+ Lewis acid sites and NiO nanoclusters, results in near 100% ethene selectivity.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Physical

Active Sites and Induction Period of Fe/ZSM-5 Catalyst in Methane Dehydroaromatization

Yu Gu et al.

Summary: Fe/ZSM-5 prepared via grinding synthesis method shows strong metal-support interaction, high resistance to reduction and carburization, leading to shortened induction period in methane dehydroaromatization reaction.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

Isolated Metal Sites in Cu-Zn-Y/Beta for Direct and Selective Butene-Rich C3+ Olefin Formation from Ethanol

Junyan Zhang et al.

Summary: This study presents a Cu-Zn-Y/Beta catalyst for selective conversion of ethanol to butene-rich C3+ olefins, highlighting the importance of unique combination of metal sites in catalyzing the reaction pathway. The study also suggests that Lewis-acidic Y sites are crucial in promoting C-C coupling in the catalyst, which could potentially lead to the development of multifunctional zeolite catalysts for complex reactions.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

In-Situ-Generated Active Hf-hydride in Zeolites for the Tandem N-Alkylation of Amines with Benzyl Alcohol

Sergio Rojas-Buzo et al.

Summary: Different silicates containing Lewis acid sites were studied for the tandem N-alkylation reaction of aniline with benzyl alcohol, with Hf-Beta and Zr-Beta showing the highest catalytic activity. The N-alkylation reaction was found to proceed through a hydrogen borrowing pathway, with in situ Hf-hydride species generated. Thermal treatment of the catalyst increased the amount of active species, and the Hf-Beta zeolite could be reused multiple times without significant deactivation.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

Zeolite-Encapsulated Cu Nanoparticles for the Selective Hydrogenation of Furfural to Furfuryl Alcohol

Peng Cao et al.

Summary: The study successfully prepared well-defined Cu nanoparticles encapsulated within titanium silicalite-1 (TS-1) by an in situ encapsulation approach, showing enhanced activity and selectivity for the selective hydrogenation of furfural to furfuryl alcohol. The Na-Cu@TS-1 catalyst exhibited high turnover frequency value and effective suppression of metal aggregation and leaching during catalysis due to the confined environment of the zeolite and electronic interaction between encapsulated Cu nanoparticles and Ti species. Na species in the catalyst not only modulate the acid/base property of the zeolite and suppress side reactions, but also facilitate the FFL hydrogenation by inducing an electronic-rich state in the encapsulated Cu species.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

Highly Selective Oxidation of Methane into Methanol over Cu-Promoted Monomeric Fe/ZSM-5

Tao Yu et al.

Summary: The study demonstrates that the Cu-modified Fe/ZSM-5 catalyst is highly efficient for the direct conversion of methane into methanol in the liquid phase using H2O2 as an oxidant. Cu species in the catalyst play a crucial role in facilitating the formation of .OH radicals, which react quickly with .CH3 radicals to form methanol. This provides valuable insights into the rational design of metal-zeolite combinations for the selective oxidation of methane into methanol.

ACS CATALYSIS (2021)

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Article Chemistry, Physical

PtZn Intermetallic Compound Nanoparticles in Mesoporous Zeolite Exhibiting High Catalyst Durability for Propane Dehydrogenation

Seung Won Han et al.

Summary: A PtZn alloy nanoparticle catalyst supported on mesoporous zeolite was synthesized and showed high activity, selectivity, and long catalytic lifetime in propane dehydrogenation. Scanning transmission electron microscopic analysis revealed finely dispersed Pt1Zn1 intermetallic compound-type alloy nanoparticles in the mesoporous zeolite, which effectively suppressed catalyst deactivation. The mesoporous structure and surface silanol groups of the MFI zeolite were suggested to play a crucial role in promoting the formation of intermetallic alloy nanoparticles.

ACS CATALYSIS (2021)

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Review Nanoscience & Nanotechnology

Emerging applications of zeolites in catalysis, separation and host-guest assembly

Yi Li et al.

Summary: New zeolitic materials have shown high performance in emerging applications across diverse areas. This Review focuses on the advances in zeolite applications, including the catalytic production of hydrocarbons and oxygenates from non-petrochemical feedstocks, the efficient separation of hydrocarbon mixtures that are otherwise challenging, and host-guest assemblies with unprecedented physical properties.

NATURE REVIEWS MATERIALS (2021)

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Editorial Material Chemistry, Physical

Identification of the active sites in supported subnanometric metal catalysts

Lichen Liu et al.

Summary: Identifying active sites in supported catalysts with isolated metal atoms and subnanometric clusters is challenging due to the difficulty in obtaining detailed structural information under reaction conditions. Limitations and pitfalls may be encountered, but suggestions can help overcome them.

NATURE CATALYSIS (2021)

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Article Chemistry, Inorganic & Nuclear

The synthesis of pure and uniform nanosized TS-1 crystals with a high titanium content and a high space-time yield

Lejian Zhang et al.

Summary: A new protocol was proposed for synthesizing Anatase-free titanium silicalite-1 (TS-1) zeolite with a Si/Ti ratio of 41, which showed high activity for the cyclohexanone ammoximation reaction. ESI-MS and DLS analyses showed that primary silicon species in the liquid seeds significantly accelerated the crystallization of TS-1 zeolite and the incorporation of titanium into the zeolite framework.

INORGANIC CHEMISTRY FRONTIERS (2021)

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Article Chemistry, Physical

Synthesis and catalytic application of nanorod-like FER-type zeolites

Weijiong Dai et al.

Summary: The direct synthesis route was used to obtain nanorod-like FER zeolite with reduced diffusion path and superior physicochemical properties. The nanorod-like FER zeolite showed high selectivity and low deactivation rates in 1-butene skeletal isomerization, as well as better coke tolerance and enhanced catalytic activity and stability compared to micron-sized counterparts.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Chemistry, Physical

Al-Modified Ti-MOR as a robust catalyst for cyclohexanone ammoximation with enhanced anti-corrosion performance

Rusi Peng et al.

Summary: Reintroducing aluminum species into Ti-MOR increased its anti-corrosion performance and catalytic stability in cyclohexanone oxime ammoximation reaction. Further sodium ion exchange eliminated undesired reactions resulting from aluminum implantation. Selectively quenching Si(OH)Al-related acidic sites enhanced catalytic activity significantly.

CATALYSIS SCIENCE & TECHNOLOGY (2021)

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Article Chemistry, Applied

Amino acid-assisted synthesis of TS-1 zeolites containing highly catalytically active TiO6 species

Yuyao Wang et al.

Summary: A novel synthesis method has been developed to tailor the distribution of Ti species in titanosilicate zeolites, achieving high catalytic performance in selective oxidation reactions.

CHINESE JOURNAL OF CATALYSIS (2021)

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Review Chemistry, Multidisciplinary

Control of location and distribution of heteroatoms substituted isomorphously in framework of zeolites and zeotype materials

Mizuho Yabushita et al.

Summary: Zeolites and zeotype materials are key functional materials used as adsorbents and catalysts in the chemical industry, with their function and performance significantly dependent on the heteroatoms that substitute the tetrahedral sites in the frameworks. The location and distribution of these substituting heteroatoms, mainly Al3+, play a crucial role in determining the performance of zeolites and zeotype materials as adsorbents and catalysts.

CRYSTENGCOMM (2021)

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Review Chemistry, Multidisciplinary

On the key role of aluminium and other heteroatoms during interzeolite conversion synthesis

Julien Devos et al.

Summary: This paper discusses the current research status of Interzeolite conversion and presents new perspectives, revealing the key role of heteroatoms in the successful conversion of parent zeolites. By revisiting the literature, the role of aluminum in parent dissolution and crystallization stages is discussed, along with the implications for the synthesis of advantageous catalytic zeolites.

RSC ADVANCES (2021)

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Article Chemistry, Physical

Enormous passivation effects of a surrounding zeolitic framework on Pt clusters for the catalytic dehydrogenation of propane

Zhiyang Zhang et al.

Summary: Enclosing metal clusters in zeolites can enhance their catalytic performance, but the surrounding zeolitic framework can also significantly passivate the metal clusters, decreasing their catalytic activity. In this study, Pt clusters enclosed in X-zeolite showed reduced catalytic performance compared to Pt clusters on the exterior of X-zeolite for the dehydrogenation of propane to propylene. The surrounding zeolitic framework was found to be the main factor attributing to the decrease in catalytic activity of enclosed metal clusters.

CATALYSIS SCIENCE & TECHNOLOGY (2021)

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Article Chemistry, Applied

Methane combustion over palladium catalyst within the confined space of MFI zeolite

Mingyang Gao et al.

Summary: Cationic Pd species encapsulated in MFI zeolite, Pd@MFI, were successfully prepared via in situ hydrothermal route followed by oxidative treatment. The as-prepared Pd@MFI samples exhibit promising activity and stability as catalysts in methane combustion. Strong interaction between Pd sites and zeolite framework, as well as the presence of Bronsted acid sites, play key roles in enhancing methane activation efficiency and catalytic performance.

CHINESE JOURNAL OF CATALYSIS (2021)

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Review Chemistry, Multidisciplinary

Solid-state NMR studies of internuclear correlations for characterizing catalytic materials

Guodong Qi et al.

Summary: This tutorial review focuses on the fundamentals and state-of-the-art applications of solid-state NMR correlation techniques in the field of heterogeneous catalysis, highlighting its important role in structural characterization of catalytic materials and relevant studies on synthesis, synergistic catalysis, host-guest interactions, and reaction mechanisms. Various correlation NMR methods have been employed to address challenging issues in heterogeneous catalysis, with promising applications and potential developments of solid-state NMR correlation spectroscopy in catalytic materials.

CHEMICAL SOCIETY REVIEWS (2021)

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Article Chemistry, Physical

Confinement of Au3+-rich clusters by using Silicalite-1 for selective solvent-free oxidation of toluene

He Huang et al.

Summary: Selective oxidation of primary carbon-hydrogen bonds in toluene to form benzaldehyde was successfully achieved using a novel catalyst design. The synergistic catalysis between Au-0 and Au3+ species in the catalyst played a crucial role in the oxidation and desorption of benzaldehyde.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Chemistry, Multidisciplinary

Transformation of Bulk Pd to Pd Cations in Small-Pore CHA Zeolites Facilitated by NO

Shunsaku Yasumura et al.

Summary: This study describes the atomic dispersion of Pd metal into small pores of CHA zeolites, achieving the introduction of Pd2+ cations into the zeolites. The research utilized various characterization techniques to investigate the structural evolution of Pd metal and successfully achieved the highest loading amount of atomic Pd2+ cations into CHA zeolites reported thus far.

JACS AU (2021)

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Article Chemistry, Multidisciplinary

The inorganic cation-tailored trapdoor effect of silicoaluminophosphate zeolite for highly selective CO2 separation

Xiaohe Wang et al.

Summary: This study demonstrated the unprecedented separation efficiency of CO2/CH4 in small-pore SAPO-RHO zeolite by exchanging protonated organic structure-directing agent with Na+, K+, or Cs+ ions. The Na+ form showed superior selectivity for CO2 separation with a record high separation factor. This work paves the way for gas separation using cation-tailored trapdoor effect in diverse silicoaluminophosphate zeolites.

CHEMICAL SCIENCE (2021)

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Review Chemistry, Multidisciplinary

Oxidative dehydrogenation of ethane: catalytic and mechanistic aspects and future trends

Sara Najari et al.

Summary: Ethene, a key commodity chemical in manufacturing diverse consumer products, can be produced through oxidative dehydrogenation of ethane to reduce carbon emissions, but requires catalysts with improved selectivity. Recent advancements in catalytic technologies and CO2-assisted ethane dehydrogenation offer opportunities for economically feasible processes.

CHEMICAL SOCIETY REVIEWS (2021)

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Review Chemistry, Multidisciplinary

Recent progress in heterogeneous metal and metal oxide catalysts for direct dehydrogenation of ethane and propane

Yihu Dai et al.

Summary: This review outlines the progress of heterogeneous metals and metal oxides catalysts for the selective dehydrogenation of light alkanes developed in the past five years. The synthesis, structural information, catalytic properties and mechanisms of these catalysts for ethane-to-ethylene and propane-to-propylene dehydrogenation are comparatively summarized. Research indicates that these catalysts have potential application prospects in non-oxidative direct dehydrogenation reactions.

CHEMICAL SOCIETY REVIEWS (2021)

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Review Chemistry, Multidisciplinary

Homogeneous and heterogeneous catalysts for hydrogenation of CO2 to methanol under mild conditions

Shao-Tao Bai et al.

Summary: CO2 hydrogenation to methanol is a crucial technology for CO2 mitigation in a carbon neutral economy. Research on catalysts for this process focuses on lower temperatures, with insights gained from molecular catalysts and efficient heterogeneous catalysts using additives to convert CO2 into methanol. While progress has been made with molecular catalysts, the mechanisms with heterogeneous catalysts remain descriptive and require further research.

CHEMICAL SOCIETY REVIEWS (2021)

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Review Chemistry, Physical

A review of confined-structure catalysts in the catalytic oxidation of VOCs: synthesis, characterization, and applications

Xueqian Wu et al.

Summary: This review focuses on the application of confined-structure catalysts in the catalytic oxidation of VOCs, highlighting the advantages of core-shell structure, channel packaging structure, two-dimensional interface induced structure, and defect-derived structure in improving the dispersity and stability of active components. The developmental perspectives and challenges of such catalysts are also discussed.

CATALYSIS SCIENCE & TECHNOLOGY (2021)

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Article Chemistry, Physical

Uniform synthesis of palladium species confined in a small-pore zeolite via full ion-exchange investigated by cryogenic electron microscopy

Yongwoo Kim et al.

Summary: Achieving full dispersion of isolated Pd2+ ions in small-pore SSZ-13 zeolite and generating uniformly dispersed nano-sized PdO clusters result in enhanced catalytic performances towards a passive NOx adsorber and CH4 combustion through controlled ion-exchange and rationalized thermal treatment.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Review Chemistry, Multidisciplinary

Heterogeneous catalysts for CO2 hydrogenation to formic acid/formate: from nanoscale to single atom

Ruiyan Sun et al.

Summary: This review comprehensively summarizes the latest advancements in heterogeneous catalysis of CO2 hydrogenation to formic acid/formate, highlighting nanostructured and single atom catalysts based on noble metals. Key factors related to catalytic activity are emphasized, providing a strong foundation for rational catalyst design.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

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Article Chemistry, Applied

Tandem Lewis acid catalysis for the conversion of alkenes to 1,2-diols in the confined space of bifunctional TiSn-Beta zeolite

Qifeng Lei et al.

Summary: The study prepared bifunctional TiSn-Beta zeolite as an efficient heterogeneous catalyst for converting alkenes to 1,2-diols in a single step with high selectivity. The isolated Ti and Sn Lewis acid sites within the zeolite enabled efficient integration of alkene epoxidation and epoxide hydration in tandem reactions, showing high selectivity towards the desired product. This novel method can be applied to other tandem catalytic reactions for sustainable chemical production.

CHINESE JOURNAL OF CATALYSIS (2021)

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Article Chemistry, Multidisciplinary

On the location of Lewis acidic aluminum in zeolite mordenite and the role of framework-associated aluminum in mediating the switch between Bronsted and Lewis acidity

Manoj Ravi et al.

Summary: The Lewis acidic aluminum in zeolites can be transformed into octahedrally coordinated aluminum, which serves as the precursor of Lewis acid sites. These Lewis acid sites preferentially locate in the pore structure of mordenite, particularly in the side-pockets. By reverting the octahedrally coordinated aluminum back to a tetrahedral geometry, the corresponding Bronsted acid sites are restored, showing a reversible switch between Lewis and Bronsted acidity.

CHEMICAL SCIENCE (2021)

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Review Chemistry, Multidisciplinary

Recent developments of nanocatalyzed liquid-phase hydrogen generation

Changlong Wang et al.

Summary: This review article provides an overview of recent achievements in nanocatalysis for hydrogen production from liquid-phase hydrogen storage materials. The catalysts range from high-performance nanocatalysts to emerging single-atom catalysts. Key aspects discussed include insights into dehydrogenation mechanisms, regenerations from spent liquid chemical hydrides, and tandem reactions using in situ generated hydrogen.

CHEMICAL SOCIETY REVIEWS (2021)

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Review Chemistry, Multidisciplinary

Dehydrogenation of light alkanes to mono-olefins

Chunyi Li et al.

Summary: Researchers are working on improving the catalysts and reactors for light alkane dehydrogenation to mono-olefins to address the high cost of Pt catalysts and potential environmental issues with CrOx, exploring new non-noble metal and environment-friendly catalysts. Additionally, reducing operation pressure can decrease the energy consumption of the entire process.

CHEMICAL SOCIETY REVIEWS (2021)

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Article Chemistry, Physical

Activated carbon templated synthesis of hierarchical zeolite Y-encapsulated iron catalysts for enhanced gasoline selectivity in CO hydrogenation

Heyang Liu et al.

Summary: The Fischer-Tropsch synthesis (FTS) is a technology with the potential for sustainable hydrocarbon fuel production. This study introduces zeolite Y-encapsulated iron catalysts with enhanced gasoline selectivity, synthesized using a low-cost crystallization procedure with activated carbon as a sacrificial template. The catalysts exhibit improved dispersion of Fe nanoparticles and porosity, leading to efficient conversion of Fe facets for enhanced C-C coupling in FTS reactions.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Chemistry, Physical

Synthesis of TS-1 zeolites from a polymer containing titanium and silicon

Jiacheng Xing et al.

Summary: The synthesis of TS-1 zeolites has revolutionized the green oxidation system by using H2O2 as an oxidant, with water as the only byproduct. A high-quality TS-1 zeolite, free of extra-framework Ti species, has been successfully synthesized using a novel polymer containing titanium and silicon. This method ensures a good matching of the hydrolysis rate between the silicon source and titanium source, facilitating the incorporation of titanium into the framework and exhibiting excellent catalytic performance in oxidation reactions.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

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Article Chemistry, Multidisciplinary

Selective methanol formation via CO-assisted direct partial oxidation of methane over copper-containing CHA-type zeolites prepared by one-pot synthesis

Sibel Sogukkanli et al.

Summary: Direct conversion of methane into methanol over Cu-CHA zeolites was successfully demonstrated with high selectivity, avoiding the formation of unwanted C2 oxygenates. The one-pot synthesis approach using a Cu complex as a structure-directing agent showed higher methanol production rate compared to conventional ion-exchange method.

GREEN CHEMISTRY (2021)

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Review Chemistry, Multidisciplinary

Heterogeneous alkane dehydrogenation catalysts investigated via a surface organometallic chemistry approach

Scott R. Docherty et al.

Summary: The review discusses the use of model dehydrogenation catalysts for light alkanes prepared via surface organometallic chemistry, with a specific focus on molecular strategies for deconvoluting complex heterogeneous materials. Challenges associated with proposed reactions and overarching themes observed from systematic studies using model SOMC catalysts are highlighted.

CHEMICAL SOCIETY REVIEWS (2021)

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Article Chemistry, Multidisciplinary

Identifying key mononuclear Fe species for low-temperature methane oxidation

Tao Yu et al.

Summary: The study identified mononuclear Fe species as the active site for the oxidation of methane in Fe/ZSM-5 zeolites, showing excellent TOR. Methane activation initially occurs on the Fe site of mononuclear Fe species, with the help of adjacent BAS facilitating further oxidation and conversion of methane.

CHEMICAL SCIENCE (2021)

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Article Chemistry, Multidisciplinary

Cooperative catalytically active sites for methanol activation by single metal ion-doped H-ZSM-5

Wei-Che Lin et al.

Summary: By analyzing metal-modified ZSM-5 zeolites using X-ray and neutron powder diffractions, it is found that active pairs of metal site-BAS within molecular distance can facilitate the heterolytic cleavage of small molecules and subsequent formation of products with high selectivity. This may explain their active and selective catalytic routes for small molecule activations.

CHEMICAL SCIENCE (2021)

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Review Chemistry, Multidisciplinary

Incorporation of Active Metal Species in Crystalline Porous Materials for Highly Efficient Synergetic Catalysis

Wen-Gang Cui et al.

Summary: The design and development of efficient catalytic materials with synergistic catalytic sites, such as crystalline porous materials (CPMs), have been a focus of recent research due to their essential role in enhancing catalytic activity and selectivity. By incorporating guest species in CPMs, synergistic effects can be achieved between different components, leading to improved performance in catalytic processes.

SMALL (2021)

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Article Chemistry, Applied

Self-aldol condensation of aldehydes over Lewis acidic rare-earth cations stabilized by zeolites

Tingting Yan et al.

Summary: Rare-earth cations stabilized by [Si]Beta zeolites, especially yttrium, showed good catalytic performance in the self-aldol condensation of aldehydes. Further analysis revealed that aldol dehydration is the rate-limiting step, and Y(OSi)(OH)(2) stabilized by zeolites is identified as the preferred active site for this reaction.

CHINESE JOURNAL OF CATALYSIS (2021)

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Review Agricultural Engineering

Recent advances in zeolite-encapsulated metal catalysts: A suitable catalyst design for catalytic biomass conversion

Mutjalin Limlamthong et al.

BIORESOURCE TECHNOLOGY (2020)

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Review Chemistry, Multidisciplinary

Variable Temperature and Pressure Operando MAS NMR for Catalysis Science and Related Materials

Nicholas R. Jaegers et al.

ACCOUNTS OF CHEMICAL RESEARCH (2020)

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Article Nanoscience & Nanotechnology

Zeolite-Enhanced Sustainable Pd-Catalyzed C-C Cross-Coupling Reaction: Controlled Release and Capture of Palladium

Yanyan Wang et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

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Article Nanoscience & Nanotechnology

In Situ Encapsulation of Pt Nanoparticles within Pure Silica TON Zeolites for Space-Confined Selective Hydrogenation

Junjie Tang et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

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Article Chemistry, Multidisciplinary

Formation and Fate of Formaldehyde in Methanol-to-Hydrocarbon Reaction: In Situ Synchrotron Radiation Photoionization Mass Spectrometry Study

Wu Wen et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Article Chemistry, Multidisciplinary

Direct Imaging of Atomically Dispersed Molybdenum that Enables Locating Aluminum in the Framework of Zeolite ZSM-5

Lingmei Liu et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Article Chemistry, Multidisciplinary

π-Interactions between Cyclic Carbocations and Aromatics Cause Zeolite Deactivation in Methanol-to-Hydrocarbon Conversion

Wang Chao et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Article Chemistry, Multidisciplinary

Steam-Induced Coarsening of Single-Unit-Cell MFI Zeolite Nanosheets and Its Effect on External Surface Bronsted Acid Catalysis

Yasmine Guefrachi et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Article Chemistry, Physical

Fluoride-free hydrothermal synthesis of nanosized Sn-Beta zeolite via interzeolite transformation for Baeyer-Villiger oxidation

Zhiguo Zhu et al.

APPLIED CATALYSIS A-GENERAL (2020)

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Review Chemistry, Physical

Characterization of Metal-zeolite Composite Catalysts: Determining the Environment of the Active Phase

Mitchell Juneau et al.

CHEMCATCHEM (2020)

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Review Chemistry, Multidisciplinary

Recent Advances in Carbon Dioxide Hydrogenation to Methanol via Heterogeneous Catalysis

Xiao Jiang et al.

CHEMICAL REVIEWS (2020)

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Article Chemistry, Physical

Breaking the Si/Al Limit of Nanosized β Zeolites: Promoting Catalytic Production of Lactide

Qiang Zhang et al.

CHEMISTRY OF MATERIALS (2020)

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Article Chemistry, Physical

Cu-Erionite Zeolite Achieves High Yield in Direct Oxidation of Methane to Methanol by Isothermal Chemical Looping

Jie Zhu et al.

CHEMISTRY OF MATERIALS (2020)

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Article Chemistry, Physical

Ultrasmall Co confined in the silanols of dealuminated beta zeolite: A highly active and selective catalyst for direct dehydrogenation of propane to propylene

Chong Chen et al.

JOURNAL OF CATALYSIS (2020)

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Article Engineering, Environmental

One-pot synthesis of layered mesoporous ZSM-5 plus Cu ion-exchange: Enhanced NH3-SCR performance on Cu-ZSM-5 with hierarchical pore structures

Cheng Peng et al.

JOURNAL OF HAZARDOUS MATERIALS (2020)

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Article Chemistry, Multidisciplinary

Isolated Indium Hydrides in CHA Zeolites: Speciation and Catalysis for Nonoxidative Dehydrogenation of Ethane

Zen Maeno et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2020)

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Article Chemistry, Physical

Quantitative production of butenes from biomass-derived gamma-valerolactone catalysed by hetero-atomic MFI zeolite

Longfei Lin et al.

NATURE MATERIALS (2020)

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Article Chemistry, Physical

Carbonylation of Dimethyl Ether to Methyl Acetate over SSZ-13

Marcella Lusardi et al.

ACS CATALYSIS (2020)

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Article Chemistry, Physical

Catalyst Design for Alkene Epoxidation by Molecular Analogues of Heterogeneous Titanium-Silicalite Catalysts

Albert Sole-Daura et al.

ACS CATALYSIS (2020)

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Article Chemistry, Physical

Insights into the Pyridine-Modified MOR Zeolite Catalysts for DME Carbonylation

Kaipeng Cao et al.

ACS CATALYSIS (2020)

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Article Chemistry, Physical

Molecular-Level Proximity of Metal and Acid Sites in Zeolite-Encapsulated Pt Nanoparticles for Selective Multistep Tandem Catalysis

Hong Je Cho et al.

ACS CATALYSIS (2020)

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Article Chemistry, Physical

Active Sites of the Selective Catalytic Reduction of NO by NH3 over Fe-ZSM-5: Combining Reaction Kinetics with Postcatalytic Mossbauer Spectroscopy at Cryogenic Temperatures

Wolfgang Gruenert et al.

ACS CATALYSIS (2020)

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Article Chemistry, Multidisciplinary

Direct Conversion of Syngas to Ethanol within Zeolite Crystals

Chengtao Wang et al.

CHEM (2020)

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Article Nanoscience & Nanotechnology

Highly Selective Aromatization of Octane over Pt-Zn/UZSM-5: The Effect of Pt-Zn Interaction and Pt Position

Peng He et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

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Article Chemistry, Multidisciplinary

A Bottom-Up Strategy for the Synthesis of Highly Siliceous Faujasite-Type Zeolite

Dali Zhu et al.

ADVANCED MATERIALS (2020)

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Article Engineering, Chemical

Green synthesis of submicron-sized Ti-rich MWW zeolite powders via a novel mechanochemical dry gel conversion in mixed steam environment

Mingyi Zhang et al.

ADVANCED POWDER TECHNOLOGY (2020)

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Article Chemistry, Multidisciplinary

Creation of Al-Enriched Mesoporous ZSM-5 Nanoboxes with High Catalytic Activity: Converting Tetrahedral Extra-Framework Al into Framework Sites by Post Treatment

Yilai Jiao et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Article Chemistry, Multidisciplinary

Subnanometer Bimetallic Platinum-Zinc Clusters in Zeolites for Propane Dehydrogenation

Qiming Sun et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Review Energy & Fuels

Methane Activation and Utilization: Current Status and Future Challenges

Lanlan Sun et al.

ENERGY TECHNOLOGY (2020)

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Review Engineering, Chemical

Solid-state NMR for metal-containing zeolites: From active sites to reaction mechanism

Xingling Zhao et al.

FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING (2020)

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Article Chemistry, Physical

Ultrasmall PtZn bimetallic nanoclusters encapsulated in silicalite-1 zeolite with superior performance for propane dehydrogenation

Yansu Wang et al.

JOURNAL OF CATALYSIS (2020)

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Article Chemistry, Physical

Oxidative dehydrogenation of propane using layered borosilicate zeolite as the active and selective catalyst

Bin Qiu et al.

JOURNAL OF CATALYSIS (2020)

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Article Chemistry, Physical

Gas-Phase Carbonylation of Dimethyl Ether on the Stable Seed-Derived Ferrierite

Hyungwon Ham et al.

ACS CATALYSIS (2020)

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Article Chemistry, Physical

Understanding Zn Functions on Hydrothermal Stability in a One-Pot-Synthesized Cu&Zn-SSZ-13 Catalyst for NH3 Selective Catalytic Reduction

Ruinian Xu et al.

ACS CATALYSIS (2020)

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Article Chemistry, Multidisciplinary

Structure and Catalytic Characterization of a Second Framework Al(IV) Site in Zeolite Catalysts Revealed by NMR at 35.2 T

Kuizhi Chen et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2020)

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Article Chemistry, Applied

Influences of synthesis conditions on preparation and characterization of Ti-MWW zeolite membrane by secondary hydrothermal synthesis

Jiamin Jiang et al.

MICROPOROUS AND MESOPOROUS MATERIALS (2020)

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Article Chemistry, Applied

Postsynthesis of Ti-UZM-35 titanosilicate as efficient catalyst for phenol hydroxylation reaction

Jianyong Yin et al.

MICROPOROUS AND MESOPOROUS MATERIALS (2020)

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Article Multidisciplinary Sciences

Dioxygen dissociation over man-made system at room temperature to form the active α-oxygen for methane oxidation

Edyta Tabor et al.

SCIENCE ADVANCES (2020)

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Article Chemistry, Multidisciplinary

Reactivity, Selectivity, and Stability of Zeolite-Based Catalysts for Methane Dehydroaromatization

Nikolay Kosinov et al.

ADVANCED MATERIALS (2020)

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Review Chemistry, Multidisciplinary

Nanopore-Supported Metal Nanocatalysts for Efficient Hydrogen Generation from Liquid-Phase Chemical Hydrogen Storage Materials

Qiming Sun et al.

ADVANCED MATERIALS (2020)

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Article Chemistry, Multidisciplinary

Single-Atom Catalysts Supported by Crystalline Porous Materials: Views from the Inside

Tianjun Zhang et al.

ADVANCED MATERIALS (2020)

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Review Chemistry, Multidisciplinary

Applications of Zeolites to C1 Chemistry: Recent Advances, Challenges, and Opportunities

Qiang Zhang et al.

ADVANCED MATERIALS (2020)

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Article Engineering, Environmental

Promoting effect of Ce and Mn addition on Cu-SSZ-39 zeolites for NH3-SCR reaction: Activity, hydrothermal stability, and mechanism study

Wang Yao et al.

CHEMICAL ENGINEERING JOURNAL (2020)

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Article Engineering, Environmental

Hierarchical zeolite enveloping Pd-CeO2 nanowires: An efficient adsorption/catalysis bifunctional catalyst for low temperature propane total degradation

Tao Dong et al.

CHEMICAL ENGINEERING JOURNAL (2020)

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Article Engineering, Environmental

A strategy for fast and facile embedding platinum nanoparticles in silicalite-1 crystallites with a stable and catalytic active structure

Yong Chen et al.

CHEMICAL ENGINEERING JOURNAL (2020)

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Article Chemistry, Multidisciplinary

Direct Atomic-Level Imaging of Zeolites: Oxygen, Sodium in Na-LTA and Iron in Fe-MFI

Alvaro Mayoral et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Article Chemistry, Multidisciplinary

Tighter Confinement Increases Selectivity ofd-Glucose Isomerization Towardl-Sorbose in Titanium Zeolites

Michael J. Cordon et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Article Chemistry, Multidisciplinary

Regioselective Generation of Single-Site Iridium Atoms and Their Evolution into Stabilized Subnanometric Iridium Clusters in MWW Zeolite

Lichen Liu et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Review Chemistry, Multidisciplinary

Electron Microscopy Studies of Local Structural Modulations in Zeolite Crystals

Qing Zhang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Article Chemistry, Multidisciplinary

Zeolite-Encaged Pd-Mn Nanocatalysts for CO2Hydrogenation and Formic Acid Dehydrogenation

Qiming Sun et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Article Chemistry, Multidisciplinary

Organic-Free Synthesis of Zeolite Y with High Si/Al Ratios: Combined Strategy of In Situ Hydroxyl Radical Assistance and Post-Synthesis Treatment

Jianyu Wang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Article Chemistry, Multidisciplinary

Ultrafast Encapsulation of Metal Nanoclusters into MFI Zeolite in the Course of Its Crystallization: Catalytic Application for Propane Dehydrogenation

Jie Zhu et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Article Chemistry, Physical

An active and stable nickel-based catalyst with embedment structure for CO2 methanation

Yiming Chen et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2020)

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Article Chemistry, Physical

Probing cobalt localization on HZSM-5 for efficient methane dehydroaromatization catalysts

Yuebing Xu et al.

JOURNAL OF CATALYSIS (2020)

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Article Chemistry, Multidisciplinary

In Situ Hydrogen Peroxide Production for Selective Oxidation of Benzyl Alcohol over a Pd@Hierarchical Titanium Silicalite Catalyst

Jinghui Lyu et al.

ACS OMEGA (2020)

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Article Chemistry, Physical

Structural modulation and direct measurement of subnanometric bimetallic PtSn clusters confined in zeolites

Lichen Liu et al.

NATURE CATALYSIS (2020)

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Review Chemistry, Multidisciplinary

State of the Art and Perspectives of Hierarchical Zeolites: Practical Overview of Synthesis Methods and Use in Catalysis

Dorien Kerstens et al.

ADVANCED MATERIALS (2020)

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Article Chemistry, Multidisciplinary

Recent Advances of Solid-State NMR Spectroscopy for Microporous Materials

Shenhui Li et al.

ADVANCED MATERIALS (2020)

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Article Chemistry, Multidisciplinary

Ethanol Conversion to Butadiene over Isolated Zinc and Yttrium Sites Grafted onto Dealuminated Beta Zeolite

Liang Qi et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2020)

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Article Chemistry, Physical

Finned zeolite catalysts

Heng Dai et al.

NATURE MATERIALS (2020)

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Review Energy & Fuels

Biomass Catalytic Pyrolysis over Zeolite Catalysts with an Emphasis on Porosity and Acidity: A State-of-the-Art Review

Rong Cai et al.

ENERGY & FUELS (2020)

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Article Chemistry, Physical

Pore Size Engineering Enabled Selectivity Control in Tandem Catalytic Upgrading of Cyclopentanone on Zeolite-Encapsulated Pt Nanoparticles

Hong Je Cho et al.

ACS CATALYSIS (2020)

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Article Engineering, Environmental

Novel shielding and synergy effects of Mn-Ce oxides confined in mesoporous zeolite for low temperature selective catalytic reduction of NOx with enhanced SO2/H2O tolerance

Ran Yan et al.

JOURNAL OF HAZARDOUS MATERIALS (2020)

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Article Chemistry, Multidisciplinary

Coking-Resistant Iron Catalyst in Ethane Dehydrogenation Achieved through Siliceous Zeolite Modulation

Zhiyuan Yang et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2020)

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Article Chemistry, Multidisciplinary

Structure and Reactivity of Oxygen-Bridged Diamino Dicopper(II) Complexes in Cu-Ion-Exchanged Chabazite Catalyst for NH3-Mediated Selective Catalytic Reduction

Chiara Negri et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2020)

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Article Multidisciplinary Sciences

Rare-earth-platinum alloy nanoparticles in mesoporous zeolite for catalysis

Ryong Ryoo et al.

NATURE (2020)

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Article Chemistry, Physical

Towards a better understanding of Lewis acidic aluminium in zeolites

Manoj Ravi et al.

NATURE MATERIALS (2020)

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Article Chemistry, Analytical

Selective detection of methane by HZSM-5 zeolite/Pd-SnO2 gas sensors

Boxuan Yang et al.

SENSORS AND ACTUATORS B-CHEMICAL (2020)

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Article Chemistry, Physical

Quantification of Intraporous Hydrophilic Binding Sites in Lewis Acid Zeolites and Consequences for Sugar Isomerization Catalysis

Juan Carlos Vega-Vila et al.

ACS CATALYSIS (2020)

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Article Chemistry, Physical

Condition-Dependent Pd Speciation and NO Adsorption in Pd/Zeolites

Keka Mandal et al.

ACS CATALYSIS (2020)

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Article Chemistry, Multidisciplinary

Metal@Zeolite Hybrid Materials for Catalysis

Hai Wang et al.

ACS CENTRAL SCIENCE (2020)

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Review Chemistry, Multidisciplinary

Catalysis for Selected C1 Chemistry

Yanting Liu et al.

CHEM (2020)

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Article Engineering, Chemical

Synthesis and Characterization of Fe-Substituted ZSM-5 Zeolite and Its Catalytic Performance for Alkylation of Benzene with Dilute Ethylene

Kai Bian et al.

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Selective Introduction of Acid Sites in Different Confined Positions in ZSM-5 and Its Catalytic Implications

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Titration and quantification of open and closed Lewis acid sites in Sn-Beta zeolites that catalyze glucose isomerization

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119Sn MAS NMR Study of the Interaction of Probe Molecules with Sn-BEA: The Origin of Penta- and Hexacoordinated Tin Formation

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Interrogating the Lewis Acidity of Metal Sites in Beta Zeolites with 15N Pyridine Adsorption Coupled with MAS NMR Spectroscopy

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Application of 119Sn CPMG MAS NMR for Fast Characterization of Sn Sites in Zeolites with Natural 119Sn Isotope Abundance

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The Cu-CHA deNOx Catalyst in Action: Temperature-Dependent NH3-Assisted Selective Catalytic Reduction Monitored by Operando XAS and XES

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Reversible Transformation of Pt Nanoparticles into Single Atoms inside High-Silica Chabazite Zeolite

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Critical Literature Review of the Kinetics for the Oxidative Dehydrogenation of Propane over Well-Defined Supported Vanadium Oxide Catalysts

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Extra-framework aluminium species in hydrated faujasite zeolite as investigated by two-dimensional solid-state NMR spectroscopy and theoretical calculations

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Acidic properties of SSZ-33 and SSZ-35 novel zeolites:: a complex infrared and MAS NMR study

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Dynamic in situ observation of rapid size and shape change of supported Pd nanoparticles during CO/NO cycling

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NATURE MATERIALS (2007)

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Probing the acid sites in confined spaces of microporous materials by vibrational spectroscopy

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Enthalpies of formation of Ge-zeolites: ITQ-21 and ITQ-22

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A density functional theory based approach to extraframework aluminum species in zeolites

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A large-cavity zeolite with wide pore windows and potential as an oil refining catalyst

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Preferential location of Ge in the double four-membered ring units of ITQ-7 zeolite

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Preferential location of Ge atoms in polymorph C of beta zeolite (ITQ-17) and their structure-directing effect: A computational, XRD, and NMR spectroscopic study

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Interaction between probe molecules and zeolites. Part II: Interpretation of the IR spectra of CO and N(2) adsorbed in NaY and NaRbY

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Transesterification of rapeseed oil in the presence of basic zeolites and related solid catalysts

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The effect of flexible lattice aluminium in zeolite beta during the nitration of toluene with nitric acid and acetic anhydride

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