EXHAUST GAS PURIFICATION CATALYST, AND METHOD FOR PRODUCING SAME

摘要

The purpose of the present invention is to provide an exhaust gas purification catalyst which can decrease a NOx reduction temperature and comprises rhodium and gold. An exhaust gas purification catalyst which carries two-element microparticles each comprising rhodium and gold, said catalyst being characterized in that the rhodium and the gold are phase-separated from each other and the content ratio of the rhodium to the gold (i.e., rhodium:gold) is (30-99.9 at.%):(70-0.1 at.%) in the two-element microparticles.