Corrosion of carbon support for PEM fuel cells by electrochemical quartz crystal microbalance

文化大學機構典藏 CCUR > 理工學院 > 工學院 > 化學工程與材料工程學系暨碩士班 > 期刊論文 > Item 987654321/24150

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题名:	Corrosion of carbon support for PEM fuel cells by electrochemical quartz crystal microbalance
作者:	Hung, CC (Hung, Chih-Cheng) Lim, PY (Lim, Pau-Yee) Chen, JR (Chen, Jiann-Ruey) Shih, HC (Shih, Han C.)
贡献者:	Inst Mat Sci & Nanotechnol
关键词:	Corrosion Electrochemical quartz crystal microbalance Carbon support Carbon black PEMFC Fuel cells
日期:	2011
上传时间:	2013-02-18 14:12:29 (UTC+8)
摘要:	During the voltammetry of carbon supports for proton exchange membrane fuel cells (PEMFCs), including commercial carbon blacks, graphitized carbon black and multi-wall carbon nanotubes (MWNTs), in deaerated 0.5 M H(2)SO(4) solution results in mass changes as observed by using in situ electrochemical quartz crystal microbalance (EQCM). The mass change and corrosion onset potential during electrochemical carbon corrosion indicate that oxides are formed and accumulated on the carbon surface, leading to an increase in mass. A decrease in the mass is associated with carbon loss from the gasification of carbon surface oxides into carbon dioxide. High BET surface area carbon blacks ECP600 and ECP 300 have a carbon loss of 0.0245 ng cm(-2) s(-1) and 0.0144 ng cm(-2) s(-1) and as compared to 0.0115 ng cm(-2) s(-1) for low surface area support XC-72 and so they are less resistant to corrosion. Graphitized XC-72 and MWNTs, with higher graphitization have higher carbon corrosion onset potential at 1.65 V and 1.62 V and appear to be more intrinsically resistant to corrosion. (c) 2010 Published by Elsevier B.V.
關聯:	JOURNAL OF POWER SOURCES 卷: 196 期: 1 特刊: SI 頁數: 140-146
显示于类别:	[化學工程與材料工程學系暨碩士班] 期刊論文

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