Fuel cell anode structure for voltage reversal tolerance
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United States of America Patent
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Oct 27, 2009
Grant Date -
Jul 23, 2009
app pub date -
Mar 9, 2009
filing date -
Aug 25, 2006
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Abstract
An anode catalyst layer for a fuel cell is presented having first and second catalyst compositions and a hydrophobic binder. The first catalyst composition includes a noble metal, other than Ru, on a corrosion-resistant support material; the second catalyst composition contains a single-phase solid solution of a metal oxide containing Ru. The through-plane concentration of ionomer in the catalyst layer decreases as a function of distance from the membrane interface. Gas diffusion electrodes, catalyst-coated membranes, MEAs and fuel cells having the foregoing anode catalyst layer are also described.
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