共 25 条
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.
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页码:2455 / 2461
页数:7
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