Silver-carbon electrocatalyst for air cathodes in alkaline fuel cells

被引：51
作者：
Gamburzev, S [1 ]
Petrov, K [1 ]
Appleby, AJ [1 ]
机构：
[1] Texas A&M Univ, Ctr Electrochem Syst & Hydrogen Res, Texas Engn Expt Stn, College Stn, TX 77843 USA
来源：
JOURNAL OF APPLIED ELECTROCHEMISTRY | 2002年 / 32卷 / 07期
关键词：
air cathode; alkaline fuel cell; carbon; electrocatalyst; silver;
D O I：
10.1023/A:1020122004048
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A method for producing electrocatalysts containing silver supported on different carbons was developed. The catalysts were investigated in air (oxygen) diffusion electrodes in alkaline electrolyte (7 M KOH). Depending on the carbon support used, up to a threefold improvement in electrode performance was achieved compared with the activity of the uncatalysed carbon in this media. At ambient temperature and atmospheric pressure, a current density of 150 mA/cm(-2) was obtained at electrode potential 1.2 V vs zinc (0.75 vs HE). A correlation between electro catalytic activity and wetted surface area of the electrocatalysts was found.
引用
收藏
页码：805 / 809
页数：5
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