Electrocatalytic corrosion of carbon support in PEMFC cathodes

被引：592

作者：

Roen, LM ^{[1
]}

Paik, CH

Jarvic, TD

机构：

[1] Univ Washington, Seattle, WA 98195 USA

[2] United Technol Res Ctr, E Hartford, CT 06108 USA

[3] UTC Fuel Cells, South Windsor, CT 06074 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2004年 / 7卷 / 01期

关键词：

D O I：

10.1149/1.1630412

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The influence of platinum on the corrosion of carbon catalyst supports has been characterized by on-line mass spectroscopy during cyclic voltammetry, with varying Pt mass fraction, catalyst type, and temperature. The CO2 generation rates increased with higher Pt mass fraction (0, 10, and 39% balanced by Vulcan XC-72). A peak observed at approximately +0.55 VRHE for Pt/C was lowered to +0.45 V-RHE for PtRu/C. An Arrenhius plot indicated higher apparent activation energy for CO2 production at the positive potential limit of the cyclic voltammogram on 0% Pt (carbon-only) electrode than on 39% Pt/C electrode. It was concluded that platinum accelerated the corrosion rate of the carbon catalyst support. (C) 2003 The Electrochemical Society.

引用

页码：A19 / A22

页数：4

共 12 条

[1] METHANOL ELECTROOXIDATION ON WELL-CHARACTERIZED PT-RN ALLOYS [J].