| 简介 |
PROBLEM TO BE SOLVED : To provide an excellent NOx occlusion reduction type catalyst for exhaust purification.SOLUTION : An NOx occlusion reduction type catalyst for exhaust purification carries, on a catalyst carrier comprising a mixture of alumina and a composite rare earth oxide comprising a combination of cerium and praseodymium, at least one platinum group metal selected from Pt, Rh, and Pd, and an NOx occlusion material that is at least one of alkali metal selected from Li, Na, K, and Cs and/or alkaline earth metal selected from Mg, Ca, Sr, and Ba.SELECTED DRAWING : Figure 10 |
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