EXHAUST CLEANING CATALYST FOR USE IN INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide an exhaust cleaning catalyst for use in an internal combustion engine having a high heat resistance and capable of maintaining its cleaning capacity at a high level even if its noble metal component is rhodium.

SOLUTION: The exhaust cleaning catalyst includes a catalyst layer formed by applying a base material (24) comprising zirconia onto the surface of an alumina substrate (22) to be membranous, and subsequently overlaying particles (20) supporting rhodium (26) on the surface of the membrane of the base material (24).

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