Catalyst and electrode catalyst layer, membrane electrode assembly, and fuel cell using the catalyst
US9947934B2 · kind B2 · utility
1Cited by
3References
14Claims
0Family size
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Key dates
| Filing date | Apr 14, 2014 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Apr 14, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.