Core-shell synthesis of carbon-supported alloy nanoparticle catalysts
US7053021B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2004 |
| Grant date | May 30, 2006 |
| Priority date | — |
| Expiry date | Apr 22, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y30/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
There is provided a method of preparing carbon supported, ternary alloy composition core-shell PtVFe nanoparticles for use as fuel cell electrocatalysts. These catalysts have been found particularly useful for oxygen reduction reactions. The alloy nanoparticles can be assembled on carbon supports which then may undergo subsequent activation and/or calcination treatments. The method, combined with new synthetic feed and processing conditions, provides core-shell PtVFe alloy nanoparticles of 1–3 nm size. The catalyst-produced high monodispersity, controlled composition are highly dispersed, and have a uniform distribution. Finally, the correlation of the preparation and treatment parameters to the ORR catalytic activities of the prepared nanoparticles is described. The catalysts exhibit ORR in the range of 2 to 4 times more than a standard Pt/carbon catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.