Catalyst layer for polymer electrolyte fuel cells
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United States of America Patent
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Dec 5, 2000
Grant Date -
N/A
app pub date -
Aug 18, 1999
filing date -
Aug 20, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A catalyst layer on a substrate material which contains a proton-conducting polymer (ionomer), electrically conductive carbon particles and fine particles of at least one precious metal. The catalyst layer is obtainable by coating the substrate material with an ink which contains a dispersion of the carbon particles and at least one organic precious metal complex compound in a solution of the ionomer, and drying the coating below a temperature at which the ionomer or the substrate material is thermally damaged, the precious metals in the complex compounds being present with an oxidation number of 0 and the complex compounds being thermally decomposed during drying to form the fine precious metal particles.
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