The inhibition of electrochemical carbon corrosion in polymer electrolyte membrane fuel cells using iridium nanodendrites

被引:40
作者
Oh, Jong-Gil [1 ]
Lee, Woong Hee [1 ]
Kim, Hansung [1 ]
机构
[1] Yonsei Univ, Dept Chem & Biomol Engn, Seoul 120749, South Korea
基金
新加坡国家研究基金会;
关键词
Carbon corrosion; Fuel cells; Water electrolysis; Iridium; Dendrite; CATALYSTS; ELECTROOXIDATION; DURABILITY; REDUCTION; OXIDATION;
D O I
10.1016/j.ijhydene.2011.10.072
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The addition of Ir-based water electrolysis catalysts to the catalyst layer in polymer electrolyte membrane fuel cells was examined as a promising approach for preventing electrochemical carbon corrosion under severely corrosive conditions. Electrochemical carbon corrosion of membrane electrode assemblies containing different amounts of IrO2 or shape-controlled Ir dendrite catalysts were characterized using on-line mass spectrometry. In particular, Ir dendrite catalysts possess high activity toward oxygen evolution reactions when compared to IrO2. As a result, Ir dendrites provided a very effective method of removing water from the catalyst layer. Therefore, the addition of 1 wt% Ir dendrite (0.008 mg cm(-2)) to the catalyst layer of the cathode decreased electrochemical carbon corrosion by 84% at 1.6 V-NHE compared with a conventional membrane electrode assembly in the absence of water electrolysis catalysts. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:2455 / 2461
页数:7
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