4.8 Article

A single site ruthenium catalyst for robust soot oxidation without platinum or palladium

Related references

Note: Only part of the references are listed.
Article Chemistry, Physical

Tracking and Understanding Dynamics of Atoms and Clusters of Late Transition Metals with In-Situ DRIFT and XAS Spectroscopy Assisted by DFT

Bidyut Bikash Sarma et al.

Summary: The structural changes of CeO2-supported single-atom catalysts (SACs) under reducing and oxidizing reaction atmospheres were studied. It was found that the changes in CO vibrational frequencies can indicate the oxidation state of the metals. Pt2+ and Pd2+ are more prone to cluster formation, while Rh3+ and Ru4+ remain as single sites.

JOURNAL OF PHYSICAL CHEMISTRY C (2023)

Article Chemistry, Multidisciplinary

Boosting Polyethylene Hydrogenolysis Performance of Ru-CeO2 Catalysts by Finely Regulating the Ru Sizes

Hongyan Ji et al.

Summary: Hydrogenolysis is an effective method for converting polyolefins into high-value chemicals. In this study, the activity of CeO2-supported Ru single atoms, nanoclusters, and nanoparticles in LDPE hydrogenolysis showed a volcanic trend. Metal-support interactions and hydrogen spillover effect were identified as the two key factors in the reaction. Only when the balance between these two effects is achieved, as in CeO2-supported Ru nanoclusters, can the hydrogenolysis activity be promoted.

SMALL (2023)

Article Chemistry, Physical

Is There a Stable Deacon Catalyst? Computational Screening Approach for the Stability of Oxide Catalysts under Harsh Conditions

Franziska Hess

Summary: This study introduces a new screening model which can predict catalyst stability under harsh reaction conditions based on thermodynamic data, providing a potential solution for large-scale implementation of technical processes.

ACS CATALYSIS (2022)

Article Multidisciplinary Sciences

Unraveling the electronegativity-dominated intermediate adsorption on high-entropy alloy electrocatalysts

Jiace Hao et al.

Summary: This study overcomes the limitations of single-element catalysts by designing a high-entropy alloy system, discovering highly active sites with optimized energy barriers, and providing an in-depth understanding of the interactions between intermediates and active sites.

NATURE COMMUNICATIONS (2022)

Article Chemistry, Multidisciplinary

Electrocatalytic Hydrogenation of 5-Hydroxymethylfurfural Promoted by a Ru1Cu Single-Atom Alloy Catalyst

Kaiyue Ji et al.

Summary: This study reports a Ru1Cu single-atom alloy catalyst with isolated Ru atoms on Cu nanowires, which can effectively promote the electrochemical reduction of 5-hydroxymethylfurfural. Compared with the Cu counterpart, this catalyst exhibits higher productivity and faradic efficiency at a lower potential, and maintains a high faradic efficiency even at high concentrations.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

Article Chemistry, Physical

Strong Ru-CeO2 interaction boosts catalytic activity and stability of Ru supported on CeO2 nanocube for soot oxidation

Changlong Zheng et al.

Summary: This study investigates the catalytic performance and thermal durability of Ru and Ag supported on CeO2 catalysts for soot oxidation. The results show that Ru/CeO2 catalyst exhibits high catalytic activity and strong thermal stability, which can be attributed to the strong interactions between Ru and CeO2.

JOURNAL OF CATALYSIS (2022)

Article Chemistry, Multidisciplinary

Operando Spectroscopic Study of the Dynamics of Ru Catalyst during Preferential Oxidation of CO and the Prevention of Ammonia Poisoning by Pt

Katsutoshi Sato et al.

Summary: Hydrogen is a promising clean energy source, but the presence of carbon monoxide in the reformate is a major issue. Ru-based catalysts are commonly used for removal of carbon monoxide in polymer electrolyte fuel cell systems. However, their durability against nitrogen impurities such as ammonia is a concern. This study investigated the deactivation of an Ru-based PROX catalyst by ammonia and the mechanism of suppression of this deactivation by adding Pt.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

Article Chemistry, Multidisciplinary

Design, Identification, and Evolution of a Surface Ruthenium(II/III) Single Site for CO Activation

Liqun Kang et al.

Summary: The study reports an air-stable surface [bipy-Ru-II(CO)(2)Cl-2] site capable of oxidizing CO, demonstrating practical control over geometric and electronic structures of single-site catalysts at the molecular level.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Physical

Interface interaction induced oxygen activation of cactus-like Co3O4/OMS-2 nanorod catalysts in situ grown on monolithic cordierite for diesel soot combustion

Yuexi Yang et al.

Summary: The interface interaction between Co3O4 and OMS-2 promotes the generation of oxygen vacancies, enhancing the activity sites for soot combustion. With optimized catalyst structure design, the apparent soot oxidation activity is significantly improved.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Engineering, Environmental

Synergistic Effects of Multicomponents Produce Outstanding Soot Oxidation Activity in a Cs/Co/MnOx Catalyst

Meng Wang et al.

Summary: This study introduces a novel non-noble metal catalyst for effectively and cleanly combusting soot emissions from diesel vehicles. The catalyst shows high activity and resistance to H2O and SO2, making it a promising candidate for application in diesel particulate filters.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Article Engineering, Environmental

Facilitating Catalytic Purification of Auto-Exhaust Carbon Particles via the Fe2O3{113} Facet-dependent Effect in Pt/Fe2O3 Catalysts

Yuanfeng Li et al.

Summary: The study found that controlling the fluoride ion concentration in the catalyst can increase the purification efficiency of carbon particles in vehicle exhaust. In addition, the active sites located at the Pt-Fe2O3{113} interface can enhance the oxidation of NO, thereby improving the activity and stability of the catalyst.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2021)

Article Chemistry, Physical

Enhanced Ammonia Synthesis Activity of Ceria-Supported Ruthenium Catalysts Induced by CO Activation

Bingyu Lin et al.

Summary: Metal-support interactions strongly impact the catalytic performances of ceria-supported metal catalysts, and hydrogen treatment at high temperature is essential for the preparation of catalysts with strong metal-support interaction (SMSI). CO activation of a Ru/CeO2 catalyst enhances the reduction degree and exposure of Ru species, leading to the formation of electron-enriched Ru delta- species and Ru delta-OV-Ce3+ sites, resulting in high ammonia synthesis activity and alleviating the ill effect of hydrogen poisoning. These findings are crucial for designing supported metal catalysts with metallic species as active sites.

ACS CATALYSIS (2021)

Article Multidisciplinary Sciences

Modulating electronic structure of metal-organic frameworks by introducing atomically dispersed Ru for efficient hydrogen evolution

Yamei Sun et al.

Summary: The research demonstrates the use of a single-atom strategy to construct high-performance electrocatalysts for hydrogen evolution reaction, showing excellent activity at all pH values and comparable performance to commercial Pt/C. Introducing single ruthenium atoms into metal-organic frameworks leads to improved binding strength for H2O and H*, enhancing HER performance.

NATURE COMMUNICATIONS (2021)

Article Multidisciplinary Sciences

Tuning the selectivity of catalytic nitriles hydrogenation by structure regulation in atomically dispersed Pd catalysts

Zhibo Liu et al.

Summary: This study focused on the selective hydrogenation of nitriles to prepare secondary and primary amines using two types of atomically dispersed Pd catalysts supported on nanodiamond-graphene hybrid support. The structure of the catalyst, whether single Pd atoms or fully exposed Pd clusters, played a crucial role in determining the product selectivity. The atomically dispersed Pd catalysts showed different selectivity towards secondary amines and primary amines due to their distinct hydrogenation pathways.

NATURE COMMUNICATIONS (2021)

Article Chemistry, Physical

Decreasing the catalytic ignition temperature of diesel soot using electrified conductive oxide catalysts

Xueyi Mei et al.

Summary: Researchers have successfully decreased the ignition temperature of soot combustion through an electrification strategy, leading to efficient combustion at low temperatures and improving catalyst efficiency. This method shows promising potential for reducing vehicle emissions at low exhaust temperatures.

NATURE CATALYSIS (2021)

Article Chemistry, Multidisciplinary

Single Co-Atoms as Electrocatalysts for Efficient Hydrazine Oxidation Reaction

Ravishankar G. Kadam et al.

Summary: A single-atom catalyst material named G(CN)-Co has been developed on functionalized graphene, demonstrating excellent catalytic activity for electrocatalytic hydrazine oxidation reaction (HzOR) with low overpotential and high current density, while remaining stable over long reaction times. This material shows promising potential as an alternative to conventional noble metal-based catalysts in HzOR-based fuel cells.

SMALL (2021)

Article Chemistry, Physical

Facile Cr3+-Doping Strategy Dramatically Promoting Ru/CeO2 for Low-Temperature CO2 Methanation: Unraveling the Roles of Surface Oxygen Vacancies and Hydroxyl Groups

Xianglan Xu et al.

Summary: The introduction of Cr element in the support of Ru/CeO2 catalyst significantly enhanced CO2 methanation activity, primarily by promoting the formate pathway. Cr3+ doping increased the number of surface oxygen vacancies and hydroxyl groups, thereby increasing the production of bicarbonates and formates, leading to improved methane production rates at low temperatures for the Ru/Ce(0.9)Cr(0.1)O(x) catalyst.

ACS CATALYSIS (2021)

Article Chemistry, Multidisciplinary

Insights into the Mechanism of Methanol Steam Reforming Tandem Reaction over CeO2 Supported Single-Site Catalysts

Luning Chen et al.

Summary: This study demonstrates how the synergy between noble metal single sites and oxygen vacancies enhances hydrogen generation efficiency and CO2 selectivity in methanol steam reforming reactions. It lays the foundation for the rational design of single site catalysts at the atomic scale and the development of highly efficient and selective hydrogen evolution systems.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

Article Multidisciplinary Sciences

Solvent-free microwave synthesis of ultra-small Ru-Mo2C@CNT with strong metal-support interaction for industrial hydrogen evolution

Xueke Wu et al.

Summary: This study demonstrates a simple, fast, solvent-free microwave pyrolysis method to synthesize highly active electrocatalysts with strong metal-support interaction and stability for large-scale industrial H-2 production. The catalyst shows promising potential for application in large-scale hydrogen production.

NATURE COMMUNICATIONS (2021)

Article Chemistry, Physical

Mechanistic Insights into Oxygen Dynamics in Soot Combustion over Cryptomelane Catalysts in Tight and Loose Contact Modes via 18O2/16O2 Isotopic Variable Composition Measurements - A Hot Ring Model of the Catalyst Operation

Joanna Grybos et al.

Summary: A Cryptomelane K-OMS-2 model catalyst with well-defined nanorod morphology dominated by specific crystal planes was synthesized and thoroughly examined. A methodology to distinguish the involvement of various reactive oxygen species in soot oxidation was developed, shedding light on the combustion process details. A functional hot ring model was established to rationalize the catalyst operation.

ACS CATALYSIS (2021)

Article Chemistry, Physical

Interface dynamics of Pd-CeO2 single-atom catalysts during CO oxidation

Valery Muravev et al.

Summary: In this study, two Pd/CeO2 single-atom catalysts for low-temperature CO oxidation were compared, revealing the impact of preparation method on their stability. Detailed in situ characterization linked the stability of the Pd single atoms to the properties of the Pd-CeO2 interface. Understanding such metal-support interactions is crucial for the rational design of stable single-atom catalysts.

NATURE CATALYSIS (2021)

Article Engineering, Environmental

Boosting the Removal of Diesel Soot Particles by the Optimal Exposed Crystal Facet of CeO2 in Au/CeO2 Catalysts

Yuechang Wei et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2020)

Article Chemistry, Multidisciplinary

A Blinking Mesoporous TiO2-xComposed of Nanosized Anatase with Unusually Long-Lived Trapped Charge Carriers

Tao Zhang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

Article Multidisciplinary Sciences

Strong metal-support interaction promoted scalable production of thermally stable single-atom catalysts

Kaipeng Liu et al.

NATURE COMMUNICATIONS (2020)

Article Chemistry, Physical

Holey Co-Ce oxide nanosheets as a highly efficient catalyst for diesel soot combustion

Bing Cui et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2020)

Article Chemistry, Physical

Synergy between Ag nanoparticles and yttria-stabilized zirconia for soot oxidation

A. Serve et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2019)

Article Chemistry, Physical

Pure Siliceous Zeolite-Supported Ru Single-Atom Active Sites for Ammonia Synthesis

Jiang-Zhen Qiu et al.

CHEMISTRY OF MATERIALS (2019)

Article Chemistry, Physical

Ceria-supported small Pt and Pt3Sn nanoparticles for NOx-assisted soot oxidation

Tahrizi Andana et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2017)

Article Chemistry, Multidisciplinary

Active Site Dependent Reaction Mechanism over Ru/CeO2 Catalyst toward CO2 Methanation

Fei Wang et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2016)

Article Multidisciplinary Sciences

Thermally stable single-atom platinum-on-ceria catalysts via atom trapping

John Jones et al.

SCIENCE (2016)

Review Chemistry, Multidisciplinary

The Many Faces of Soot: Characterization of Soot Nanoparticles Produced by Engines

Reinhard Niessner

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2014)

Article Chemistry, Physical

Morphology effect of Ru/CeO2 catalysts for the catalytic combustion of chlorobenzene

Hao Huang et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2014)

Article Chemistry, Physical

Shape-Dependent Activity of Ceria in Soot Combustion

Eleonora Aneggi et al.

ACS CATALYSIS (2014)

Article Chemistry, Physical

Room Temperature Oxidation of Ruthenium

Benjamin Herd et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2013)

Article Chemistry, Physical

Catalytic combustion of chlorobenzene over Ru-doped ceria catalysts

Qiguang Dai et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2012)

Article Chemistry, Multidisciplinary

Highly Active Catalysts of Gold Nanoparticles Supported on Three-Dimensionally Ordered Macroporous LaFeO3 for Soot Oxidation

Yuechang Wei et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2011)

Review Chemistry, Physical

Anatase TiO2 with Dominant High-Energy {001} Facets: Synthesis, Properties, and Applications

Shengwei Liu et al.

CHEMISTRY OF MATERIALS (2011)

Article Chemistry, Multidisciplinary

Single-atom catalysis of CO oxidation using Pt1/FeOx

Botao Qiao et al.

NATURE CHEMISTRY (2011)

Review Chemistry, Physical

Simultaneous oxidation of carbon black and volatile organic compounds over Ru/CeO2 catalysts

Samer Aouad et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2009)

Article Chemistry, Physical

Enhanced photoresponse towards visible light in Ru doped titania nanotube

M. Alam Khan et al.

APPLIED SURFACE SCIENCE (2009)

Article Chemistry, Physical

Mesoscale organization of nearly monodisperse flowerlike ceria microspheres

Chunwen Sun et al.

JOURNAL OF PHYSICAL CHEMISTRY B (2006)

Article Chemistry, Physical

Probing defect sites on the CeO2 surface with dioxygen

VV Pushkarev et al.

JOURNAL OF PHYSICAL CHEMISTRY B (2004)

Article Chemistry, Physical

A climbing image nudged elastic band method for finding saddle points and minimum energy paths

G Henkelman et al.

JOURNAL OF CHEMICAL PHYSICS (2000)