EXHAUST GAS PURIFICATION CATALYST AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a catalyst material that becomes active even at low temperatures and has catalyst performance excellent enough to purify hazardous substances in exhaust gas efficiently.SOLUTION: An exhaust gas purification catalyst 1 includes a Rh-containing catalyst layer 4 provided on a base material 2. The Rh-containing catalyst layer 4 includes a binder material 10 made of Rh-doped CeZr-based composite oxide containing Ce and Zr and solutionized with Rh. The binder material 10 has been previously subjected to a reduction treatment.