EXHAUST GAS PURIFYING CATALYST

摘要

Provided is an exhaust cleaning catalyst with which precious metal sintering is inhibited and which has greater exhaust cleaning abilities. The present invention provides an exhaust cleaning catalyst comprising a substrate and a catalyst coating layer provided on the substrate. The catalyst coating layer comprises a precious metal that serves as an oxidation and/or reduction catalyst. The precious metal comprises Rh-containing metal particles in which rhodium (Rh) coexists with a base metal selected among platinum group elements excluding rhodium. The Rh-containing metal particles have an average rhodium content of 0.1 % to 5 % by mole with the total amount of the base metal and rhodium being 100 % by mole.