| abstract |
Provided is a catalyst that, while having efficacy in combusting PM at a comparatively low temperature, has a high efficiency in eliminating (converting) HC and CO even at said operating temperature. The catalyst composition, which disperses/holds at least one platinum group element selected from Pt, Rh, and Pd in a platinum group holding body containing at least one element selected from Zr, Al, Y, Si, Bi, Pr, and Tb, and which supports the result on the surface of a Ce oxide that has Ce as a necessary constituent component, has both PM combusting activity and gas purification activity. |