| abstract |
To provide a three-way catalyst for purifying exhaust gas and a method for producing the same, which has high exhaust gas purification performance, high activity at low temperature, excellent heat stability, and can prevent sintering of noble metals. The catalyst comprises a noble metal component particle having a particle diameter of 1 to 20 nm and a promoter component film covering the noble metal component particle, or the catalyst is supported on a porous refractory inorganic oxide powder. Or a three-way catalyst for purifying exhaust gas, which is carried on a carrier made of ceramics or a metal material, and a method for producing the same. [Selection figure] None |