Method of using catalyst containing noble metal and cerium dioxide
US5993762A · kind A · utility
28Cited by
9References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 8, 1995 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Nov 8, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A reaction comprising the oxidation of carbon monoxide to carbon dioxide, eg in vehicle exhausts, employs a catalyst composed of metal oxide, eg. ceria, particles among which are uniformly incorporated noble metal particles, the particles having such a high interaction that, without hydrogen reduction pre-treatment, the catalyst exhibits the formation of anionic vacancies on the metal oxide surface at a temperature lower than does the corresponding catalyst prepared by impregnation. The catalyst employed is preferably prepared by co-precipitation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.