Compositions of nanometal particles containing a metal or alloy and platinum particles
US7955755B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2007 |
| Grant date | Jun 7, 2011 |
| Priority date | — |
| Expiry date | May 29, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Cathodes suitable for use in direct methanol fuel cells are disclosed. A cathode can comprise a composition supported on a conductive substrate, where the composition comprises: reactive nano-particles each consisting essentially of a core of metal and/or metal alloy and a shell of an oxide of the metal and/or metal alloy in the core; platinum and/or platinum alloy particles devoid of an oxide shell; and an ionomer. The metal nanoparticles can comprise one or more of palladium, chromium, manganese, nickel, iron, copper, gold, lanthanum, cerium, tin, sulfur, selenium, cobalt, silver, and alloys thereof. Direct methanol fuel cell incorporating these cathodes are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.