Pt submonolayers on Ru nanoparticles - A novel low Pt loading, high CO tolerance fuel cell electrocatalyst

被引：168

作者：

Brankovic, SR ^{[1
]}

Wang, JX ^{[1
]}

Adzic, RR ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Div Mat & Chem Sci, Energy Sci & Technol Dept, Upton, NY 11973 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2001年 / 4卷 / 12期

关键词：

D O I：

10.1149/1.1414943

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A new method for the preparation of Pt-Ru and similar bimetallic electrocatalysts is reported. It involves a spontaneous deposition of Pt submonolayers on metallic Ru nanoparticles, which yields electrocatalysts with a considerably lower Pt loading and higher CO tolerance than the commercial Pt-Ru alloy electrocatalysts. The method offers a unique possibility to place the Pt atoms onto the surface of Ru nanoparticles, which very likely makes almost all of them available for hydrogen oxidation, in contrast to the Pt-Ru alloy catalysts that have Pt throughout the nanoparticles. Thus, an ultimate reduction of Pt loading can be achieved. It also facilitates a fine-tuning of the electrocatalyst's activity and selectivity by changing the coverage (the cluster size) of Pt for optimal performance under required CO tolerance levels. (C) 2001 The Electrochemical Society. [DOI: 10.1149/1.1414943] All rights reserved.

引用

页码：A217 / A220

页数：4

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