Vacancy dynamics on CO-covered Pt(111) electrodes

被引：3
|
作者：
Wei, Jie [1 ,2 ]
Chen, Yan-Xia [1 ]
Magnussen, Olaf M. [2 ]
机构：
[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
[2] Univ Kiel, Inst Expt & Appl Phys, D-24098 Kiel, Germany
来源：
CHEMICAL COMMUNICATIONS | 2020年 / 56卷 / 59期
基金：
美国国家科学基金会;
关键词：
PLATINUM DISSOLUTION; SURFACE-STRUCTURE; ADSORPTION; OXIDATION; PT(100);
D O I：
10.1039/d0cc04046k
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In situvideo-STM studies of Pt(111) electrodes in CO-saturated 0.1 M H(2)SO(4)solution are presented, which reveal the presence of defined point defects in the CO pre-oxidation regime, where the surface is covered by a highly dynamic apparent (1 x 1)-CO adlayer. These defects are generated at the Pt steps and can switch between a mobile and an immobile state. They are assigned to diffusing vacancies in the Pt surface layer, induced by interaction of the highly mobile CO adsorbates with Pt surface atoms at potentials as low as 0.30 V-Ag/AgCl.
引用
收藏
页码：8309 / 8312
页数：4
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