Membrane electrode assemblies with hydrogen peroxide decomposition catalyst
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United States of America Patent
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Sep 26, 2006
Grant Date -
Mar 4, 2004
app pub date -
Sep 4, 2002
filing date -
Sep 4, 2002
priority date (Note) -
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Abstract
A membrane electrode assembly includes an anode including a hydrogen oxidation catalyst; a cathode; a membrane disposed between the anode and the cathode; and a peroxide decomposition catalyst positioned in at least one position selected from the group consisting of the anode, the cathode, a layer between the anode and the membrane and a layer between the cathode and the membrane wherein the peroxide decomposition catalyst has selectivity when exposed to hydrogen peroxide toward reactions which form benign products from the hydrogen peroxide. The peroxide decomposition catalyst can also be positioned within the membrane. Also disclosed is a power-generating fuel cell system including such a membrane electrode assembly, and a process for operating such a fuel cell system.
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