Effect of operating conditions on carbon corrosion in polymer electrolyte membrane fuel cells

被引：111
|
作者：
Lim, Katie Heeyum [1 ]
Oh, Hyung-Suk [1 ]
Jang, Sang-Eun [1 ]
Ko, Young-Jin [1 ]
Kim, Hyun-Jong [2 ]
Kim, Hansung [1 ]
机构：
[1] Yonsei Univ, Dept Chem & Biomol Engn, Seoul 120749, South Korea
[2] Korea Inst Ind Technol, Inchon, South Korea
来源：
JOURNAL OF POWER SOURCES | 2009年 / 193卷 / 02期
关键词：
Carbon corrosion; Humidification; Mass spectrometry; Polymer electrolyte membrane fuel cells; ELECTROCHEMICAL DURABILITY; PLATINUM DISSOLUTION; OXIDE-FILM; STABILITY; NANOTUBES; MECHANISM; SUPPORT; REDUCTION; KINETICS;
D O I：
10.1016/j.jpowsour.2009.04.006
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 influence of humidity, cell temperature and gas-phase O-2 on the electrochemical corrosion of carbon in polymer electrolyte membrane fuel cells is investigated by measuring CO2 emission at a constant potential of 1.4V for 30 min using on-line mass spectrometry. Carbon corrosion shows a strong positive correlation with humidity and cell temperature. The presence of water is indispensable for electrochemical carbon corrosion. By contrast, the presence of gas-phase O-2 has little effect on electrochemical carbon corrosion. With increased carbon corrosion, changes in fuel cell electrochemical characteristics become more prominent and thereby indicate that such corrosion significantly affects fuel cell durability. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：575 / 579
页数：5
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