The role of ruthenium in improving the kinetics of hydrogen oxidation and evolution reactions of platinum

被引：293

作者：

Zhu, Shangqian ^{[1
]}

Qin, Xueping ^{[1
]}

Xiao, Fei ^{[1
]}

Yang, Shuangli ^{[2
]}

Xu, Yuan ^{[3
]}

Tan, Zhuo ^{[4
,5
]}

Li, Jiadong ^{[1
]}

Yan, Jiawei ^{[4
,5
]}

Chen, Qing ^{[3
,6
,7
]}

Chen, Mingshu ^{[2
]}

Shao, Minhua ^{[1
,7
,8
,9
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Chem & Biol Engn, Kowloon, Hong Kong, Peoples R China

[2] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces,Natl Engn, Xiamen, Peoples R China

[3] Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Kowloon, Hong Kong, Peoples R China

[4] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen, Peoples R China

[5] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen, Peoples R China

[6] Hong Kong Univ Sci & Technol, Dept Chem, Hong Kong, Peoples R China

[7] Hong Kong Univ Sci & Technol, Energy Inst, Hong Kong, Peoples R China

[8] Hong Kong Univ Sci & Technol, Hong Kong Branch, Southern Marine Sci & Engn Guangdong Lab, Kowloon, Hong Kong, Peoples R China

[9] Hong Kong Univ Sci & Technol, Chinese Natl Engn Res Ctr Control & Treatment Hea, Kowloon, Hong Kong, Peoples R China

来源：

NATURE CATALYSIS | 2021年 / 4卷 / 08期

关键词：

ENHANCED INFRARED-ABSORPTION; ELASTIC BAND METHOD; ALKALINE MEDIA; SINGLE-CRYSTAL; WATER; ELECTROCATALYSTS; ENERGY; HYDROXIDE; CATALYSTS; ORIGIN;

D O I：

10.1038/s41929-021-00663-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Modifying Pt surfaces by foreign metals with a higher oxophilicity is a promising approach to improve the kinetics of hydrogen evolution and oxidation reactions. The role of foreign metals, however, is not fully understood. Here we study Ru-modified Pt as a model system to understand the underlying mechanisms in activity improvement through combining in situ infrared spectroscopy and theoretical calculations. In an alkaline solution, the hydrogen evolution and oxidation reaction activity of Ru-modified Pt is proportional to the Ru coverage due to the strain and electronic effects of the Pt substrate, which lower the energy barrier of the rate-determining Volmer step; these are the governing reasons for the improved catalytic activities. This work not only deepens our understanding of hydrogen electrocatalysis mechanisms, but also provides guidelines for the rational design of advanced electrocatalysts.

引用

页码：711 / 718

页数：8

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