Catalyst and electrode catalyst layer, membrane electrode assembly, and fuel cell using the catalyst
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United States of America Patent
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Apr 17, 2018
Grant Date -
Mar 10, 2016
app pub date -
Apr 14, 2014
filing date -
Apr 25, 2013
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Abstract
The present invention has an object to provide a catalyst having excellent oxygen reduction reaction activity. The present invention relates to a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein a specific surface area of the catalyst per support weight is 715 m2/g support or more or a covering ratio of the catalyst metal with an electrolyte is less than 0.5, and an amount of an acidic group of the catalyst per support weight is 0.75 mmol/g support or less.
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