EXHAUST GAS PURIFICATION CATALYST, AND EXHAUST GAS PURIFICATION FILTER AND PROCESS USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an exhaust gas purification catalyst that can exhibit a sufficiently high PM oxidation activity even when exposed to a sulfur-containing gas.SOLUTION: Provided is an exhaust gas purification catalyst characterized in comprising a carrier that is mainly composed of alumina, and an active species particulate that is mainly composed of a silver sulfate supported on the surface of said carrier, and that has an average crystallite diameter of 3 nm or more and less than 100 nm.