Catalysis of hydrogen evolution on Pt(111) by absorbed hydrogen

被引：5

作者：

Wei, Jie ^{[1
]}

He, Zheng-da ^{[1
]}

Chen, Wei ^{[1
]}

Chen, Yan-Xia ^{[1
]}

Santos, Elizabeth ^{[2
,3
]}

Schmickler, Wolfgang ^{[2
]}

机构：

[1] Univ Sci & Technol China, Dept Chem Phys, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China

[2] Ulm Univ, Inst Theoret Chem, Ulm, Germany

[3] Univ Nacl Cordoba, IFEG CONICET, Fac Matemat Astron & Fis, Cordoba, Argentina

来源：

JOURNAL OF CHEMICAL PHYSICS | 2021年 / 155卷 / 18期

基金：

中国国家自然科学基金;

关键词：

SINGLE-CRYSTAL SURFACES; PLATINUM; ADSORPTION; ELECTRODES; OCCLUSION; OPD;

D O I：

10.1063/5.0072069

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：

The activity of Pt(111) electrodes for the hydrogen evolution reaction (HER) in 0.5M H2SO4 solution is found to increase with continuous potential cycling in the HER potential region. In addition, the basic cyclic voltammograms obtained in 0.5M H2SO4 saturated with N-2 after HER show several characteristic changes: the current waves for hydrogen adsorption in the region of0.2 < E < 0.35 V and for sulfate adsorption at 0.35 < E < 0.5 V decrease and the current spike at 0.44 V for the phase transition of the sulfate adlayer gradually disappears. We suggest that these changes are caused by the absorption of a small amount of hydrogen in the subsurface layer and propose a mechanism by which this enhances hydrogen evolution.

引用

页数：5

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