Exhaust gas purifying catalyst

An exhaust gas purifying catalyst comprising:

• a honeycomb substrate disposed in an exhaust passage for an engine;
• and
• a catalytic layer formed on a cell wall of said substrate, said catalytic layer including a mixed oxide which contains Ce (cerium) and Zr (zirconium), and retains a catalytic noble metal in such a manner that said noble metal atoms are located at crystal lattice points or between the lattice points of the mixed oxide, wherein
• said mixed oxide includes a first mixed oxide containing CeO2 in a mass greater than that of ZrO2, and a second mixed oxide containing ZrO2 in a mass greater than that of CeO2,
• wherein said first mixed oxide contains CeO2 in 65 mass % or more with respect to a total mass of CeO2, and ZrO2;
• said second mixed oxide contains ZrO2 in 65 mass % or more with respect to a total mass of CeO2 and ZrO2, and
• wherein said catalytic layer comprises a plurality of layers having a laminated structure, at least one of said layers containing said first mixed oxide, and at least one of the remaining layers containing said second mixed oxide.