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http://dx.doi.org/10.5229/JKES.2009.12.2.142

Effect of Graphitized Carbon Supports on Electrochemical Carbon Corrosion in Polymer Electrolyte Membrane Fuel Cells  

Oh, Hyung-Suk (Specialized Graduate School of Hydrogen & Fuel Cell Yonsei University)
Sharma, Raj Kishore (Dept. of Chemical and Biomolecular Engineering, Yonsei University)
Haam, Seung-Joo (Dept. of Chemical and Biomolecular Engineering, Yonsei University)
Lee, Chang-Ha (Dept. of Chemical and Biomolecular Engineering, Yonsei University)
Kim, Han-Sung (Specialized Graduate School of Hydrogen & Fuel Cell Yonsei University)
Publication Information
Journal of the Korean Electrochemical Society / v.12, no.2, 2009 , pp. 142-147 More about this Journal
Abstract
The influence of graphitization of carbon support on the electrochemical corrosion of carbon and sintering of Pt particles are investigated by measuring $CO_2$ emission at a constant potential of 1.4 V for 30 min using on-line mass spectrometry and cyclic voltammogram. In comparison to commercial Pt/C (from Johnson Matthey), highly graphitized carbon nanofiber (CNF) supported Pt catalyst exhibits lower performance degradation and $CO_2$ emission. As the more carbon corrosion occurred, the more prominent changes were detected in electrochemical characteristics of fuel cell. This indicates that the carbon corrosion affects significantly the fuel cell durability. From the observed results, CNF is considered to be more corrosion resistant material as a catalyst support. However, CNF shows higher aggregation of Pt particles under repeated cyclic voltammetry between 0 and 0.8 V where the carbon corrosion is not initiated.
Keywords
Carbon nanofiber; Durability; Carbon corrosion; Sintering; PEM fuel cell;
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