EXHAUST GAS PURIFYING CATALYST

摘要

Disclosed is an exhaust gas purifying catalyst excellent in flammability. Specifically disclosed is an exhaust gas purifying catalyst (1) comprising a catalyst base (3), and a catalyst coat layer (5) formed on the catalyst base (3) and containing a noble metal and a fire-resistant inorganic oxide. This exhaust gas purifying catalyst (1) is characterized in that an upstream inner layer (17) contains a cerium-zirconium complex oxide having a composition ratio of CeO₂ of 50-95 wt% and an upstream outer layer (15) contains a cerium-zirconium complex oxide having a composition ratio of ZrO₂ of 50-95 wt%. The exhaust gas purifying catalyst (1) is further characterized in that Rh is contained as a noble metal in the upstream outer layer (15) and a downstream portion (13), and the amount of Rh contained in the upstream outer layer (15) is more than the amount of Rh contained in the downstream portion (13).