| abstract |
An excellent NOx occlusion reduction type exhaust gas purification catalyst is provided. At least one platinum group metal selected from Pt, Rh, Pd, and Li, Na, on a catalyst support including a mixture of alumina and a composite rare earth oxide in which cerium and praseodymium are combined. A NOx occlusion reduction type exhaust gas purifying catalyst carrying an NOx occlusion material which is at least one of an alkali metal selected from K and Cs and / or an alkaline earth metal selected from Mg, Ca, Sr and Ba. [Selection] Figure 10 |