4.7 Article

Comparative Study of α- and β-MnO2 on Methyl Mercaptan Decomposition: The Role of Oxygen Vacancies

Related references

Note: Only part of the references are listed.
Article Environmental Sciences

Insight into phase structure-dependent soot oxidation activity of K/MnO2 catalyst

Changlong Zheng et al.

Summary: In this study, two nanosized MnO2 catalysts with different phase structures and potassium loaded MnO2 catalysts with varying K loading amounts were prepared. The catalytic activity for soot oxidation was found to be highly dependent on the K loading amount and the phase structure of MnO2.

JOURNAL OF ENVIRONMENTAL SCIENCES (2023)

Article Engineering, Environmental

Amorphous and homogeneously Zr-doped MnOx with enhanced acid and redox properties for catalytic oxidation of 1,2-Dichloroethane

Gong Chen et al.

Summary: A series of MnOx based catalysts were prepared and investigated for 1,2-dichloroethane (1,2-DCE) oxidation. The RZrMn catalyst prepared by a novel reflux method showed improved acid and redox properties, leading to better catalytic activity, durability and resistance against water for 1,2-DCE oxidation. The catalytic oxidation process and formation of by-products on MnOx based catalysts were found to be influenced by acid and redox sites, with a positive correlation between total acid amount or OAds/OLatt and reaction rate.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Engineering, Environmental

Regulation of the reaction pathway to design the high sulfur/coke-tolerant Ce-based catalysts for decomposing sulfur-containing VOCs

Xiaohua Cao et al.

Summary: The study focuses on regulating the reaction pathway to address coke and sulfur poisoning challenges in methyl mercaptan decomposition. The Ce/MCM-41 catalyst showed good stability by transforming its active centers from surface reactive oxygen to strong acid sites, effectively converting sulfur elements and avoiding excessive accumulation on the catalyst. This research provides insights into a new reaction pathway and deactivation mechanism of Ce-based catalysts, offering a promising strategy for developing high coke/sulfur-tolerance catalysts for sulfur-containing organic compounds elimination.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Nanoscience & Nanotechnology

Effect of MnO2 Polymorphs? Structure on Low-Temperature Catalytic Oxidation: Crystalline Controlled Oxygen Vacancy Formation

Fei-Xiang Tian et al.

Summary: Different MnO2 polymorphs were studied for their properties in CO oxidation, with beta-MnO2 showing higher activity and stability. The mechanism of CO oxidation over MnO2 was proposed based on in situ spectra and intrinsic kinetic studies.

ACS APPLIED MATERIALS & INTERFACES (2022)

Article Chemistry, Physical

Phase-dependent catalytic performance of MnO2 for solvent-free oxidation of ethybenzene with molecular oxygen

Jiangyong Liu et al.

Summary: This study investigates the phase-dependent reactivity of MnO2 materials and their correlation with the oxidation state of Mn, ion ratio, and oxygen species. DFT studies confirm the easier adsorption and activation of molecular oxygen over delta-MnO2. These findings provide important insights into the catalytic synthesis of high value-added chemicals using MnO2-based materials.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Chemistry, Physical

The positive effect of water on acetaldehyde oxidation depended on the reaction temperature and MnO2 structure

Zeyu Zhao et al.

Summary: The presence of H2O vapor has a significant impact on the catalytic oxidation of acetaldehyde with different MnO2 phases, promoting the reaction at moderate temperatures and hindering it at high temperatures.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Chemistry, Physical

Realizing a redox-robust Ag/MnO2 catalyst for efficient wet catalytic ozonation of S-VOCs: Promotional role of Ag(0)/Ag(I)-Mn based redox shuttle

Chun He et al.

Summary: A novel process for S-VOCs degradation using wet scrubbing coupled with catalytic ozonation was developed, and Ag/R-MnO2 catalyst exhibited superior performance in wet catalytic ozonation process. The efficient electron replenishing interaction between Ag(0)/Ag(I) and multivalent R-MnO2, efficient O3 activation through oxygen vacancies-rich R-MnO2, and enhanced mass diffusion in wet scrubbing process contribute to the excellent performance.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Engineering, Environmental

Facet selectively exposed α-MnO2 for complete photocatalytic oxidation of carcinogenic HCHO at ambient temperature

Danni Ding et al.

Summary: This study compared the properties and photocatalytic activity of different crystal facets of α-MnO2 by selectively exposing them. The α-MnO2 with exposed {3 1 0} facets exhibited superior photocatalytic activity under solar-light irradiation and visible light.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Engineering, Environmental

Enhanced MnO2/peroxymonosulfate activation for phthalic acid esters degradation: Regulation of oxygen vacancy

Yanhao Wang et al.

Summary: This study demonstrates the crucial role of oxygen vacancies (OVs) in activating peroxymonosulfate (PMS) for phthalic acid esters (PAEs) degradation. α-MnO2, with abundant OVs, exhibits high catalytic activity, while the other three types of MnO2 do not have OVs.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Chemistry, Multidisciplinary

Interstitial Atomic Bi Charge-Alternating Processor Boosts Twofold Molecular Oxygen Activation Enabling Rapid Catalytic Oxidation Reactions at Room Temperature

Qiyu Lian et al.

Summary: This study demonstrates that interstitial atomic Bi anchored in the lattice interstice of MnO2 can boost the catalytic oxidation reactions by triggering an alternative twofold O-2 activation, weakening the O-2 dissociation energy barrier by reconstructing the local charge landscape and elongating the O-O bond length.

ADVANCED FUNCTIONAL MATERIALS (2022)

Article Engineering, Environmental

Catalytic oxidation of benzyl alcohol over MnO2: Structure-activity description and reaction mechanism

Jie Shi et al.

Summary: This study systematically investigates the structure-activity relationship of MnO2 catalysts with different crystal structures towards the oxidation of benzyl alcohol. A catalytic activity descriptor is established based on theoretical and experimental investigations, and beta-MnO2 with a high surface area is successfully fabricated, showing the highest benzyl alcohol conversion rate. A Mars-van Krevelen mechanism is proposed to describe the oxidation process on the beta-MnO2 surface. This research paradigm opens up new possibilities for the rational design of metal oxide catalysts.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Engineering, Environmental

Acid Etching-Induced In Situ Growth of λ-MnO2 over CoMn Spinel for Low-Temperature Volatile Organic Compound Oxidation

Cangpeng Shan et al.

Summary: Surface lattice oxygen plays a crucial role in the degradation of VOCs over transition metal oxides. In this study, MnO2 nanoparticles were in situ grown on the surface of a spinel catalyst through acid etching, leading to the activation of surface lattice oxygen and improved catalytic performance and stability.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Article Chemistry, Physical

Alkali Metals and Cerium-Modified La-Co-Based Perovskite Catalysts: Facile Synthesis, Excellent Catalytic Performance, and Reaction Mechanisms for Soot Combustion

Di Yu et al.

Summary: A series of alkali metals and cerium-modified La-Co-based perovskite catalysts were prepared using glucose as a complexing agent. Among these catalysts, La0.9Ce0.05K0.05CoO3 showed the highest catalytic activity for soot combustion and good resistance to sulfur and water.

ACS CATALYSIS (2022)

Article Chemistry, Physical

O-vacancy-rich porous MnO2 nanosheets as highly efficient catalysts for propane catalytic oxidation

Shipeng Wu et al.

Summary: In this study, a facile solvent-thermal-reduction strategy was used to fabricate an O-vacancy-rich porous MnO2 nanosheet catalyst (MnO2-PS) for propane catalytic oxidation. The catalyst exhibited improved redox ability and oxygen activation capacity, which accelerated the oxidation of light alkanes. Additionally, the catalyst possessed highly accessible surface and high density of exposed active sites, facilitating the adsorption and activation of reactant molecules.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Review Chemistry, Multidisciplinary

MnO2-Based Materials for Environmental Applications

Ruijie Yang et al.

Summary: Manganese dioxide is a promising semiconductor material for environmental applications, but its purification efficiency has been limited. Recent efforts have focused on improving the purification efficiency through morphology control and structure construction. MnO2-based materials have potential for adsorption and degradation of pollutants, and future research should focus on nanostructures and composite design.

ADVANCED MATERIALS (2021)

Article Chemistry, Multidisciplinary

Investigation into the Phase-Activity Relationship of MnO2 Nanomaterials toward Ozone-Assisted Catalytic Oxidation of Toluene

Ruijie Yang et al.

Summary: This study investigates the catalytic activity of six types of MnO2 with different crystal phases towards toluene degradation, revealing that the crystal phase plays a crucial role in determining the catalytic activity. The research further demonstrates that the high catalytic activity of MnO2 is attributed to the abundant oxygen vacancies and strong mobility of oxygen species.

SMALL (2021)

Article Biotechnology & Applied Microbiology

Promoted adsorption of methyl mercaptan by γ-Al2O3 catalyst loaded with Cu/Mn

Honghong Yi et al.

Summary: This study investigates the effect of loaded metals on the catalytic performance of gamma-Al2O3 catalysts for the removal of CH3SH. The results show that Cu and Mn loading have a positive impact on catalytic activity, with the catalyst loaded with 15% Cu and 5% Mn achieving the best removal rate.

ENVIRONMENTAL TECHNOLOGY & INNOVATION (2021)

Article Engineering, Environmental

Engineering of crystal phase over porous MnO2 with 3D morphology for highly efficient elimination of H2S

Xiaohai Zheng et al.

Summary: In this study, alpha-, beta- and delta-MnO2 catalysts with hierarchically porous structure were prepared using a facile oxalate-derived hydrothermal method. The phase-dependent behavior for selective oxidation of H2S over MnO2 catalysts was studied, revealing that delta-MnO2 exhibited superior activity and stability with almost 100% H2S conversion and sulfur selectivity. The hierarchically porous structure of delta-MnO2 nanosphere suppressed the generation of by-products SO2 and sulfate, making Mn-based catalysts more suitable for industrial applications.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Chemistry, Physical

Hierarchically Hollow MnO2@CeO2 Heterostructures for NO Oxidation: Remarkably Promoted Activity and SO2 Tolerance

Lei Chen et al.

Summary: This study reveals a versatile and scalable methodology for designing hollow MnO2@CeO2 heterostructures for NO oxidation, showing remarkable low-temperature catalytic activity and strong SO2 tolerance. The work provides an alternative perspective in developing high-performance hollow core-shell nanostructured catalysts for atmospheric pollutant purification and industrial thermal catalysis processes.

ACS CATALYSIS (2021)

Article Chemistry, Physical

Comparative study of α-, β-, γ- and δ-MnO2 on toluene oxidation: Oxygen vacancies and reaction intermediates

Wenhao Yang et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2020)

Article Engineering, Chemical

HCHO Removal by MnO2(x)-CeO2: Influence of the Synergistic Effect on the Catalytic Activity

Shengnan Guan et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2020)

Article Nanoscience & Nanotechnology

Novel Core-Shell (ε-MnO2/CeO2)@CeO2 Composite Catalyst with a Synergistic Effect for Efficient Formaldehyde Oxidation

Shuai Zhang et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

Article Multidisciplinary Sciences

Non-equilibrium crystallization pathways of manganese oxides in aqueous solution

Wenhao Sun et al.

NATURE COMMUNICATIONS (2019)

Article Engineering, Environmental

Interfacial Charging-Decharging Strategy for Efficient and Selective Aerobic NO Oxidation on Oxygen Vacancy

Hao Li et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2019)

Article Chemistry, Multidisciplinary

Effect of MnO2 Crystal Structure on Aerobic Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid

Eri Hayashi et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

Article Engineering, Environmental

Removal of volatile odorous organic compounds over NiAl mixed oxides at low temperature

Shunzheng Zhao et al.

JOURNAL OF HAZARDOUS MATERIALS (2018)

Article Engineering, Environmental

Effect of MnO2 Phase Structure on the Oxidative Reactivity toward Bisphenol A Degradation

Jianzhi Huang et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2018)

Article Engineering, Chemical

Promotional effects of rare-earth (La, Ce and Pr) modification over HZSM-5 for methyl mercaptan catalytic decomposition

Jiangping Liu et al.

JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS (2017)

Article Chemistry, Physical

Surface oxygen vacancy induced α-MnO2 nanofiber for highly efficient ozone elimination

Guoxiang Zhu et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2017)

Article Environmental Sciences

Selection of active phase of MnO2 for catalytic ozonation of 4-nitrophenol

Faheem Nawaz et al.

CHEMOSPHERE (2017)

Article Chemistry, Physical

Catalytic decomposition of gaseous ozone over manganese dioxides with different crystal structures

Jingbo Jia et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2016)

Article Chemistry, Physical

Boosting soot combustion efficiencies over CuO-CeO2 catalysts with a 3DOM structure

Jinguo Wang et al.

CATALYSIS SCIENCE & TECHNOLOGY (2016)

Review Chemistry, Multidisciplinary

Nanostructured Mn-based oxides for electrochemical energy storage and conversion

Kai Zhang et al.

CHEMICAL SOCIETY REVIEWS (2015)

Article Engineering, Environmental

Effect of Methanethiol Concentration on Sulfur Production in Biological Desulfurization Systems under Haloalkaline Conditions

Pawel Roman et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2015)

Article Chemistry, Physical

Oxidative degradation of sulfamethoxazole by different MnO2 nanocrystals in aqueous solution

Junli Wan et al.

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL (2015)

Article Multidisciplinary Sciences

Reaction of O2 with Subsurface Oxygen Vacancies on TiO2 Anatase (101)

Martin Setvin et al.

SCIENCE (2013)

Article Chemistry, Multidisciplinary

Mesoporous crystalline β-MnO2- : a reversible positive electrode for rechargeable lithium batteries

Feng Jiao et al.

ADVANCED MATERIALS (2007)

Article Chemistry, Physical

Effects of Ni doping on [MnO6] octahedron in LiMn2O4

YJ Wei et al.

JOURNAL OF PHYSICAL CHEMISTRY B (2004)