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Corrosion resistance and sintering effect of carbon supports in polymer electrolyte membrane fuel cells

Authors
Journal
Electrochimica Acta
0013-4686
Publisher
Elsevier
Publication Date
Volume
54
Issue
26
Identifiers
DOI: 10.1016/j.electacta.2009.06.028
Keywords
  • Carbon Nanocage
  • Carbon Corrosion
  • Mass Spectrometry
  • Pem Fuel Cell
Disciplines
  • Chemistry

Abstract

Abstract The corrosion resistance of carbon black, carbon nanofiber and carbon nanocage used as catalyst supports in fuel cells was investigated by monitoring CO 2 emission using on-line mass spectrometry when 1.4 V was applied for 30 min. The changes associated with the carbon corrosion were assessed through electrochemical methods. In general, graphitized carbon supports were more corrosion-resistant than amorphous carbon black. However, the degree of graphitization did not directly correlate with higher resistance to corrosion. Hydrophobicity was critical in enhancing resistance to corrosion. When sintering of Pt particles was considered, carbon nanocages were more resistant than nanofibers. The present findings thus indicate that the carbon nanocage is an appropriate catalyst support in fuel cell systems.

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