EXHAUST GAS CLEANING CATALYST

PROBLEM TO BE SOLVED: To provide an exhaust gas cleaning catalyst enhanced in its cleaning capacity by further enhancing the support concentration of a carrier. SOLUTION: In manufacturing the occlusion and reduction type exhaust gas cleaning catalyst by supporting an occlusion material for occluding a substance to be cleaned and a reducing catalyst for reducing and cleaning the substance to be cleaned discharged from the occlusion material on the carrier, a nitrogen oxide occluding element being the occlusion material and a noble metal being the reducing catalyst are supported on the carrier comprising manganese oxide having a hollandite type crystal structure. Typically, the nitrogen oxide occluding element is selected from the group consisting of alkali metals, alkaline earth metals and rare earth metals and the noble metal is selected from the group consisting of Pt, Pd and Rh. COPYRIGHT: (C)2003,JPO