CATALYST FOR EXHAUST GAS PURIFICATION AND PRODUCTION METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a catalyst for exhaust gas purification which can improve the combustion efficiency of PM and prevent rising of the back pressure, clogging of a filter and deterioration of fuel consumption.SOLUTION: A catalyst for exhaust gas purification is arranged in an exhaust gas passage of an engine and has a catalyst layer 22 on a carrier substrate 21, and the catalyst layer 22 contains a plurality of types of γ-alumina 23 and 24 different in ingredients and Pt25 supported in the plurality of types of γ-alumina.