Patent ID: 7863217

Claim:
An exhaust gas purifying catalyst comprising a catalyst layer formed on a honeycomb-shaped support, wherein said catalyst layer is formed by mixing a first catalyst powder (A) consisting of a composite oxide which contains at least Ce, Zr, and a catalytic noble metal composition, and a second catalyst powder (B) consisting of a Zr-based oxide which consists of Zr as a primary component, at least one rare-earth metal selected from the group of Pr, Nd, La, Sm, Y, Yb, and Rh, and which has the Rh existing on a surface and in an inside of the Zr-based oxide, wherein a ratio of a mass of said second catalyst powder (B) to a total mass of said first catalyst powder (A) and said second catalyst powder (B) is in the range of 1 to 50%.