Catalyst for treating internal combustion engine exhaust gas

Details Catalyst for treating internal combustion engine exhaust gas Catalyst for treating internal combustion engine exhaust gas

B - Operations, Transporting

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23/342, 252/50,

B01J 23/54 (2006.01) B01D 53/94 (2006.01) B01J 23/38 (2006.01) B01J 23/56 (2006.01) B01J 23/63 (2006.01) B01J 23/66 (2006.01) B01J 35/02 (2006.01) B01J 37/03 (2006.01) F01N 3/10 (2006.01)

Patent

CA 2111529

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.

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