Catalyst.

摘要

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.