Patent ID: 8202483

Claim:
A catalyst-supported particulate filter in which a catalyst layer is formed on the walls of exhaust gas channels in a filter body for trapping particulates exhausted from an engine, wherein the surface of the catalyst layer is formed to have a mixture of regions in which first catalyst parts are exposed and regions in which second catalyst parts are exposed, the second catalyst parts being more widely exposed on the surface of the catalyst layer than the first catalyst parts, the first catalyst parts contain activated alumina particles carrying Pt, the second catalyst parts contain ZrNd-based mixed oxide particles containing Zr, Nd and a rare earth metal M other than Ce and Nd, wherein the second catalyst parts do not contain Ce and activated alumina particles carrying Pt, and either one or both of the first catalyst parts and the second catalyst parts further contain CeZr-based mixed oxide particles containing Ce, Zr and a rare earth metal R other than Ce.