Electrochemical Study of Oxygen Reduction on a Carbon-Supported Core-Shell Platinum-Gold Electrocatalyst with Tuneable Gold Surface Composition

被引：6

作者：

Mahesh, Ijjada ^{[1
]}

Sarkar, A. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem Engn, Bombay 400076, Maharashtra, India

来源：

CHEMELECTROCHEM | 2016年 / 3卷 / 05期

关键词：

core-shell structures; oxygen reduction reaction; redox transmetalation; surface-limited redox reactions; underpotential deposition; THIN-FILM; NANOPARTICLES; CATALYSTS; MONOLAYER; ALLOY; ELECTRODES; DEPENDENCE; KINETICS; AU; SEGREGATION;

D O I：

10.1002/celc.201500452

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The presence of gold on the surface of platinum nanoparticles can have profound effects on the activity in the electrochemical oxygen reduction reaction (ORR). In this work, the ORR activity is studied at different surface coverage of gold on two types of core-shell platinum-gold catalysts. Surface-limited redox reaction and redox transmetalation methods are used to synthesize core-shell catalysts with varying degrees of gold coverage on their surface. Experimental results indicate that the presence of gold on the surface intrinsically decreases the ORR activity. Furthermore, the effect of the core on the activity for ORR has been studied.

引用

页码：836 / 845

页数：10

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