CATALYST HAVING EXCELLENT HEAT RESISTANCE FOR USE IN PURIFYING EXHAUST GASES FROM INTERNAL COMBUSTION ENGINES, AND PROCESS FOR PRODUCTION THEREOF

摘要

An exhaust gas purifying catalyst having excellent heat resistance comprises a platinum-group element, active alumina, cerium oxide, a barium compound and a zirconium compound on a monolithic support. The barium compound is preferably barium hydroxide, barium oxide or barium carbonate. The zirconium compound is preferably zirconium oxide.