Enhancing CO tolerance of electrocatalysts: Electro-oxidation of CO on WC and Pt-modified WC

被引：37

作者：

Mellinger, Zachary J. ^{[1
]}

Weigert, Erich C. ^{[1
]}

Stottlemyer, Alan L. ^{[1
]}

Chen, Jingguang G. ^{[1
]}

机构：

[1] Univ Delaware, Dept Chem Engn, Ctr Catalyt Sci & Technol, Newark, DE 19716 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2008年 / 11卷 / 05期

关键词：

D O I：

10.1149/1.2844209

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We investigated tungsten monocarbide (WC) and Pt-modified WC as CO-tolerant electrocatalysts as compared to pure Pt. The binding energy of CO, estimated using temperature-programmed desorption, is weaker on WC and Pt/WC than on Pt, suggesting that it should be easier to oxidize CO on WC and Pt/WC. This hypothesis was verified using cyclic voltammetry to compare the electro-oxidation of CO on WC, Pt/WC, and Pt supported on carbon substrates, which showed a lower voltage for the onset of oxidation of CO on WC and Pt/WC than on Pt. (c) 2008 The Electrochemical Society.

引用

页码：B63 / B67

页数：5

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