Mechanisms for the Production and Suppression of Hydrogen Peroxide at the Hydrogen Electrode in Proton Exchange Membrane Fuel Cells and Water Electrolyzers: Theoretical Considerations DOI Open Access
Donald A. Tryk, Guoyu Shi, Katsuyoshi Kakinuma

et al.

Catalysts, Journal Year: 2024, Volume and Issue: 14(12), P. 890 - 890

Published: Dec. 4, 2024

Hydrogen peroxide is inevitably produced at the hydrogen electrode in both proton exchange membrane fuel cell (PEMFC) and water electrolyzer (PEMWE) when platinum-based catalysts are used. This attacks degrades membrane, seriously limiting its lifetime. Here we review some of our previous efforts to suppress production using PtFe as a evolution reaction (HER) catalyst PtCo oxidation (HOR) catalyst. The mechanisms, which involve chemical adsorbed with oxygen, examined density functional theory. onset excess 0.1 V above reversible potential has not been adequately explained thus far, therefore new mechanism proposed here. involves unique site including (110) step edges adjacent (111) terraces on Pt surface, well alloys other metals such Rh Ir. helps explain recent finding Wadayama group that Ir single crystal surfaces Ir(111) Ir(110) produce little during HOR. It also points way toward design for while retaining high HOR HER activity.

Language: Английский

Recent advances in green H2O2 production via metal-based functional materials: applications, strategies, and catalytic mechanisms DOI

Danhua Jiao,

Yongjun Li, Xiaodong Cai

et al.

Rare Metals, Journal Year: 2025, Volume and Issue: unknown

Published: April 15, 2025

Language: Английский

Citations

0
Mechanisms for the Production and Suppression of Hydrogen Peroxide at the Hydrogen Electrode in Proton Exchange Membrane Fuel Cells and Water Electrolyzers: Theoretical Considerations DOI Open Access
Donald A. Tryk, Guoyu Shi, Katsuyoshi Kakinuma

et al.

Catalysts, Journal Year: 2024, Volume and Issue: 14(12), P. 890 - 890

Published: Dec. 4, 2024

Hydrogen peroxide is inevitably produced at the hydrogen electrode in both proton exchange membrane fuel cell (PEMFC) and water electrolyzer (PEMWE) when platinum-based catalysts are used. This attacks degrades membrane, seriously limiting its lifetime. Here we review some of our previous efforts to suppress production using PtFe as a evolution reaction (HER) catalyst PtCo oxidation (HOR) catalyst. The mechanisms, which involve chemical adsorbed with oxygen, examined density functional theory. onset excess 0.1 V above reversible potential has not been adequately explained thus far, therefore new mechanism proposed here. involves unique site including (110) step edges adjacent (111) terraces on Pt surface, well alloys other metals such Rh Ir. helps explain recent finding Wadayama group that Ir single crystal surfaces Ir(111) Ir(110) produce little during HOR. It also points way toward design for while retaining high HOR HER activity.

Language: Английский

Citations

2