CATALYST FOR CLEANING EXHAUST GAS

摘要

PROBLEM TO BE SOLVED: To produce a catalyst in which the specific surface area of an oxide carrier can be restrained from being reduced and the grain growth of a noble metal to be deposited on the oxide carrier can also be restrained.

SOLUTION: This catalyst is composed of the oxide carrier the specific surface area of which, when heat-treated in an oxidizing atmosphere, is substantially equal to that when heat-treated in a reducing atmosphere and the noble metal deposited on the oxide carrier. Since the extent of reduction of the specific surface area in the reducing atmosphere is substantially equal to that of reduction of the specific surface area in the oxidizing atmosphere, the reduction of the specific surface area can be restrained in comparison with the conventional oxide carrier.

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