Carbon-supported catalysts for fuel cells
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United States of America Patent
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Apr 15, 2003
Grant Date -
Jul 26, 2001
app pub date -
Mar 5, 2001
filing date -
Mar 6, 1998
priority date (Note) -
Expired
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Abstract
Carbon-supported catalysts are frequently employed in the electrodes of solid polymer fuel cells in order to make efficient use of the catalyst therein. The catalyst utilization in the electrode and the fuel cell performance can be further improved by introducing acidic surface oxide groups on the carbon-supported catalyst. The introduction of acidic surface oxide groups on the carbon-supported catalyst can be accomplished by treating the carbon-supported catalyst with a suitable acid, such as nitric acid, before incorporating the carbon-supported catalyst in a fuel cell electrode. The present technique is particularly suitable for use in solid polymer fuel cell cathodes.
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