Breaking symmetry for better catalysis: insights into single-atom catalyst design

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

This review examines the strategies of symmetry breaking (charge/coordination/geometric) in single-atom catalysts to regulate active site electronic structures, greatly enhancing catalytic performance.

Language: Английский

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Unlocking Superior Hydrogen Oxidation and CO Poisoning Resistance on Pt Enabled by Tungsten Nitride-Mediated Electronic Modulation

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 28, 2024

Enhancing the activity and CO poisoning resistance of Pt-based catalysts for anodic hydrogen oxidation reaction (HOR) poses a significant challenge in development proton exchange membrane fuel cells. Herein, we leverage theoretical calculations to demonstrate that tungsten nitride (WN) can intricately modulate electronic structure Pt. This modulation optimizes adsorption, significantly boosting HOR activity, simultaneously weakens markedly improving poisoning. Through prescreening with rational design, synthesized an efficient catalyst comprising minimal Pt content (only 1.4 wt %) supported on small-sized WN/reduced graphite oxide (Pt@WN/rGO). As anticipated, this showcases remarkable acidic mass 3060 A g

Language: Английский

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Enhancing CO Tolerance in PEMFC Anodes via Thermal Oxidation Induced RuO₂ Blocking Shell on a PtRu/C Catalyst

Nano Letters, Journal Year: 2024, Volume and Issue: 24(34), P. 10642 - 10649

Published: Aug. 19, 2024

CO poisoning in Pt-based anode catalysts significantly hampers the proton exchange membrane fuel cell (PEMFC) performance. Despite great advances CO-tolerant catalysts, their effectiveness is often limited to fundamental three-electrode systems, which inadequate for practical PEMFC applications. Herein, we present a straightforward thermal oxidation strategy constructing Ru oxide blocking layer on commercial PtRu/C through one-step Ru-segregation-and-oxidation process. The resulting 0.7 nm thick effectively inhibits adsorption while maintaining hydrogen activity. PtRu@RuO

Language: Английский

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Intrinsic Activity: A Critical Challenge of Alkaline Hydrogen Oxidation Reaction

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 16, 2024

Abstract Anion exchange membrane fuel cells (AEMFCs) are advantageous for reducing or even eliminating the dependency on platinum resources, as alkaline environment allows use of non‐precious metal catalysts oxygen reduction reaction at cathode. However, intrinsic activity hydrogen oxidation (HOR) in environments is 2 to 4 orders magnitude lower than acidic environments, which becomes major challenge AEMFCs. This review examines current developments HOR and systematically summarizes activation mechanism with a focus potential influencing factors enhancement strategies. Furthermore, it offers insights into prospects developing more efficient catalysts.

Language: Английский

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Alkaline hydrogen oxidation reaction on nickel-based non-noble metal electrocatalysts

eScience, Journal Year: 2025, Volume and Issue: unknown, P. 100400 - 100400

Published: March 1, 2025

Language: Английский

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Heterogeneous interface and vacancy engineering contribute to metastable catalysts for overall water splitting

Acta Materialia, Journal Year: 2025, Volume and Issue: unknown, P. 120934 - 120934

Published: March 1, 2025

Language: Английский

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Atomically Dispersed Tungsten Enhances CO Tolerance in Electrocatalytic Hydrogen Oxidation by Regulating the 5d-Orbital Electrons of Platinum

Advanced Powder Materials, Journal Year: 2025, Volume and Issue: unknown, P. 100288 - 100288

Published: March 1, 2025

Language: Английский

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