| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the catalytic performance of a catalyst for cleaning exhaust including a Ce-Zr complex oxide supporting Pd and Rh employed therein as catalytic metal. <P>SOLUTION: The catalyst for cleaning exhaust includes a plurality of catalyst layers 2, 3 laid over a support 1. The plurality of the catalyst layers include a lower catalyst layer 2 comprising a first complex oxide containing Ce and Zr, and Pd supported by the first complex oxide, and an upper catalyst layer 3 comprising a second complex oxide containing Ce and Zr, and Rh supported by the second complex oxide. At least one species of alkali earth metals selected from Ca, Sr, and Mg is dissolved as a solid solution at least in one of the first complex oxide and the second complex oxide. <P>COPYRIGHT: (C)2010,JPO&INPIT |
