Polymorphic cerium-based Prussian blue derivatives with in situ growing CNT/Co heterojunctions for enhanced microwave absorption via polarization and magnetization

Nano Research, Journal Year: 2023, Volume and Issue: 17(3), P. 2050 - 2060

Published: Nov. 18, 2023

Language: Английский

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Nitrogen-doped carbon nanotubes-locally-grown three-dimensional CeO2/C/Co foam enabling fabulous hydrophobicity, thermal insulation, and highly efficient microwave absorption

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160007 - 160007

Published: Jan. 1, 2025

Language: Английский

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Tunning valence state of cobalt centers in Cu/Co-CoO1-x for significantly boosting water-gas shift reaction

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 16, 2025

Dual active sites with synergistic valence state regulation under oxidizing and reducing conditions are essential for catalytic reactions step-wise mechanisms to modulate the complex adsorption of reactant molecules on surfaces heterogeneous catalysts maximized performances, but it has been rarely explored. In this work, uniformly dispersed CuCo alloy CoO nanosheet composite dual constructed, which shows huge boost in activity catalyzing water-gas shift reaction (WGSR), a record high rate reaching 204.2 μmolCO gcat.-1 s-1 at 300 °C Cu1Co9Ox amongst reported Cu-based Co-based catalysts. A mechanism is proposed that Coδ+ species can be easily reduced by CO adsorbed Cu Co0 oxidized H2O. Systematic situ characterization results reveal addition regulate redox properties Co thus Particularly, doping Cu0 weakens affinity surface or CO2 moderate level. Moreover, also promotes oxidation *CO *COOH desorption product CO2, carbon poisoning catalyst increasing reactivity. The would provide guidance construction novel clarify its underlying reactivity enhancement induced tunning metal centers reactions.

Language: Английский

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Adsorption of Molecules on Defective CeO₂ for Advanced Catalysis

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(7), P. 4629 - 4645

Published: March 22, 2023

Adsorption of molecules on active sites heterogeneous catalysts significantly affects their catalytic performance, which provides a perspective to understand the process/mechanism at atomic level and establish structure–function relationships. This Perspective illustrates strong correlation between adsorption reactants CeO2-based improved activity and/or selectivity for various transformations. Regulating oxygen defect CeO2 an effective approach construct two typical frustrated Lewis pair (FLP) dual-active site. Benefiting from unique spatial electronic structures, FLP exhibit "embedded" configuration small molecules, promoting activation transformation. The constructed by metal clusters vacancy could break competitive thereafter enable highly selective hydrogenations. Finally, possibilities challenges in behaviors are outlined. tailorability strength anticipated stimulate guide design high-performing catalysts.

Language: Английский

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Boosting reactivity of water-gas shift reaction by synergistic function over CeO2-x/CoO1-x/Co dual interfacial structures

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Oct. 27, 2023

Dual-interfacial structure within catalysts is capable of mitigating the detrimentally completive adsorption during catalysis process, but its construction strategy and mechanism understanding remain vastly lacking. Here, a highly active dual-interfaces CeO2-x/CoO1-x/Co constructed using pronounced interfacial interaction from surrounding small CeO2-x islets, which shows high activity in catalyzing water-gas shift reaction. Kinetic evidence in-situ characterization results revealed that modulates oxidized state Co species consequently generates dual interface WGS A synergistic redox comprised independent contribution functional interfaces, including CeO2-x/CoO1-x CoO1-x/Co, authenticated by experimental theoretical results, where alleviates CO poison effect, CoO1-x/Co promotes H2 formation. The may provide guidance for fabricating dual-interfacial structures shed light on over multi-component catalyst systems.

Language: Английский

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Tunable Interfacial Electronic Pd–Si Interaction Boosts Catalysis via Accelerating O₂ and H₂O Activation

JACS Au, Journal Year: 2023, Volume and Issue: 3(4), P. 1230 - 1240

Published: April 3, 2023

Engineering the interfacial structure between noble metals and oxides, particularly on surface of non-reducible is a challenging yet promising approach to enhancing performance heterogeneous catalysts. The interface site can alter electronic d-band metal sites, facilitating transition energy levels reacting molecules promoting reaction proceed in favorable direction. Herein, we created an active Pd-Si with tunable metal-support interaction (EMSI) by growing thin permeable silica layer oxide ZSM-5 (termed Pd@SiO2/ZSM-5). Our experimental results, combined density functional theory calculations, revealed that enhanced charge transfer from deposited Si Pd, generating electron-enriched Pd surface, which significantly lowered activation barriers for O2 H2O. resulting reactive oxygen species, including O2-, O22-, -OH, synergistically facilitated formaldehyde oxidation. Additionally, moderate promote catalytic cycle Pd0 ⇆ Pd2+, adsorption reactants. This study provides strategy design high-performance catalysts practical applications.

Language: Английский

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Enhanced CO2 methanation activity over Ni/CeO2 catalyst by adjusting metal-support interactions

Molecular Catalysis, Journal Year: 2024, Volume and Issue: 558, P. 114034 - 114034

Published: March 13, 2024

Language: Английский

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Strong metal-support interactions between highly dispersed Cu+ species and ceria via mix-MOF pyrolysis toward promoted water-gas shift reaction

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 91, P. 475 - 483

Published: Jan. 21, 2024

Language: Английский

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Synergistically regulating d-band centers of heterojunction redox sites by ligand effect for photocatalytic H2 evolution

Science China Materials, Journal Year: 2024, Volume and Issue: 67(2), P. 524 - 531

Published: Jan. 23, 2024

Language: Английский

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Enhancing metal-support interactions in CeAlOx/Co inverse catalyst for significantly boosting ammonia decomposition reaction

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125020 - 125020

Published: Jan. 1, 2025

Language: Английский

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