| 摘要 |
An exhaust gas purifying catalyst includes: a composite oxide represented by: (Aa-w-xMwM′x) (Si6-yNy)O27-z. A is a cation of at least one of La and Pr; M is a cation of at least one of Ba, Ca, and Sr; M′is a cation of at least one of Nd, Y, Al, Pr, Ce, Sr, Li, and Ca; N is a cation of at least one of Fe, Cu, and Al. The following are satisfied: 6≰a≰10, 0<w<5, 0≰x<5, 0<w+x≰5, 0≰y≰3, 0≰z≰3, A≠M′, and x≠0 when A is a cation of La. A noble metal ingredient which forms a solid solution with the composite oxide or is supported on the composite oxide, and an exhaust gas purifying catalyst product formed of a carrier made of a ceramic or metallic material, and a layer of the exhaust gas purifying catalyst supported on the carrier.
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