CATALYST FOR CLEANING EXHAUST GAS, METHOD FOR MANUFACTURING CATALYST FOR CLEANING EXHAUST GAS, AND HONEYCOMB CATALYST FOR CLEANING EXHAUST GAS

摘要

PROBLEM TO BE SOLVED: To increase a purification performance of a reducing gas such as HC or CO when an oxidation/reduction atmosphere variation of the exhaust gas occurs.SOLUTION: A catalyst 1 for cleaning the exhaust gas has a first oxide particle 3 supporting an Rh particle 2, a second oxide particle 6 supporting a Pt particle 5 and having an oxygen sucking and releasing capacity, and a third oxide particle 8 intervening between these oxide particles. The distance between centroids L between the first oxide particle 3 and the second oxide particle 6 is 50-400 nm.