A catalyst for purifying exhaust gas

文件类型：PDF文档
文件大小：174K
Provided is a technique by which excellent exhaust gas purification performances can be achieved. The exhaust gas-purifying catalyst according to the present invention includes a substrate, a first catalytic layer facing the substrate and comprising at least one precious metal selected from the group consisting of palladium and platinum, and alumina doped with an alkaline-earth metal element, and a second catalytic layer facing the substrate with the first catalytic layer interposed therebetween or intervening between the substrate and the first catalytic layer, the second catalytic layer comprising rhodium and alumina doped with the alkaline-earth metal element.