| 摘要 |
<P>PROBLEM TO BE SOLVED: To produce a waste gas purification catalyst exhibiting a high HC (hydrocarbon) cleaning performance. <P>SOLUTION: This waste gas cleaning catalyst comprises a carrier layer and a catalyst noble metal. Therein, the carrier layer contains aluminum, cerium, zirconium and at least one kind of rare earth element. The catalyst noble metal is platina, palladium and rhodium and a weight ratio of Pt:Pd:Rh is 2-10:20-30:0.5-2. The waste gas purification catalyst has the excellent purification performance of HC component by controlling the weight ratio between the component contained in a porous body constituting the carrier layer and the catalyst noble metal. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
