| 摘要 |
In an exhaust gas purification catalyst in which Rh-doped CeZr-based mixed oxide powder and precious-metal (at least one of Pt and Pd)-supporting heat-resistant powder are included in a catalyst layer 2 provided on a support 1, Rh-doped CeZr-based mixed oxide particles either contain at least one of Pr, La, and Y, or are complexed with Al 2 O 3 , and support none of Pt and Pd, and heat-resistant particles supporting the precious metal are one of at least one of activated Al 2 O 3 particles containing La, BaSO 4 particles, and complex particles made ofCeZr-based mixed oxide and Al 2 O 3 . |
