Investigation of platinum oxidation in PEM fuel cells at various relative humidities

被引：80

作者：

Xu, Hui ^{[1
]}

Kunz, Russell

Fenton, James M.

机构：

[1] Univ Connecticut, Dept Chem Engn, Storrs, CT 06269 USA

[2] Univ Cent Florida, Florida Solar Energy Ctr, Cocoa, FL USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2007年 / 10卷 / 01期

关键词：

D O I：

10.1149/1.2372230

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Surface oxidation of Pt cathode of proton exchange membrane (PEM) fuel cells at different relative humidities (RHs) was studied using cyclic voltammetry. The degree of platinum oxidation increased significantly with an increase in RH from 20% to 72%. Holding the cathode at high potentials and exposing it to air instead of N-2 resulted in the formation of more platinum oxides. At 20% RH, 0.85 V, and 100 degrees C, both water and oxygen equally contribute to platinum oxidation; at 100% RH, 0.85 V, and 100 degrees C, water produces more than 70% of the platinum oxidation while 30% forms from oxygen. (c) 2006 The Electrochemical Society.

引用

页码：B1 / B5

页数：5

共 12 条

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