Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 10, Issue 7, Pages 1048-1051Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.05.006
Keywords
durability fuel cells; mass spectrometry; carbon corrosion; carbon supports
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The electrochemical corrosion of carbon catalyst supports in polymer electrolyte membrane (PEM) fuel cells is investigated by monitoring the generation of CO2 using an on-line mass spectrometer at a constant potential of 1.4 V. Our results suggest that carbon supports with a high degree of graphitization are more corrosion-resistant, which results in a dramatic improvement of the catalyst durability. We also show that CO2 measurements performed using on-line mass spectrometry represent a time-effective and reliable method for studying the electrochemical corrosion of carbon supports in PEM fuel cells. (c) 2008 Elsevier B.V. All rights reserved.
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