| 摘要 |
PURPOSE:To obtain a catalyst excellent in exhaust gas purifying capacity after high temp. endurance, in an exhaust gas purifying catalyst purifying HC, CO and NOX in the exhaust gas discharged from an internal combustion engine, by adding an oxide powder containing at least cerium and zirconium to a coating layer containing rhodium. CONSTITUTION:In a monolithic exhaust gas purifying catalyst whose catalyst coating layer contains rhodium or rhodium and platinum or palladium, at least an oxide powder prepared from an aqueous solution containing at least cerium and zirconium ions by precipitate forming reaction and activated alumina, the oxide powder contains at least 10-30mol% of cerium and 70-90mol% of zirconium. |
