Electrode catalyst and electrochemical devices using the same
US6649300B2 · kind B2 · utility
23Cited by
3References
10Claims
0Family size
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Key dates
| Filing date | May 18, 2001 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrode catalyst for fuel cells which comprises a conductive carbon, platinum supported on the conductive carbon in an amount of from 20% by mass to 70% by mass based on the mass of the catalyst, and oxygen bonded chemically to the conductive carbon and present in the range of from 0.7 to 3 in atomic ratio to the platinum. The present electrode catalyst can attain a high activity because the platinum crystallite diameter has been kept small even when the platinum is supported in a large quantity in the amount more than 20% by mass. The catalyst is useful in fuel cells, e.g., solid polymer electrolyte fuel cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.