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Title:
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The influence of carbon dioxide on PEM fuel cell anodes
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Author(s):
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Published by:
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Publication date:
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ECN
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1-10-2001
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ECN report number:
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Document type:
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ECN-RX--01-065
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Article (scientific)
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Number of pages:
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23
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Published in: Journal of Power Sources (Elsevier), , 2002, Vol.110, p.117-124.
Abstract:
The influence of CO2 on the performance of PEM fuel cells was investigatedby means of fuel cell experiments and cyclic voltammetry. Depending
on the composition and microstructure of the fuel cell anode, the effect
varies from small to significant. Adsorbed hydrogen plays a domi-nant
role in the formation of CO-like species via the reverse water gas shift
reaction. Platinum sites which are not utilised in the electrochemical
oxidation of hydrogen are thought to catalyse this reverse shift reaction.
Alloying with ruthenium suppresses the reverse shift reaction.
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