| 摘要 |
An object and problem of the present invention is to provide a layered composite oxide being excellent in oxygen ion conductivity and, in particular, being capable of effectively decreasing a PM oxidation temperature without using a noble metal such as platinum or the like, and provide an oxidation catalyst, DPF, a ternary catalyst, and a NOx purification catalyst which use the layered composite oxide. The layered composite oxide of the present invention has a composition represented by the following formula (1), La 1.5 Sr 1.5 Mn 2 - y B y O 7 ... (1) (wherein B represents Cu and/or Fe, and y satisfies 0 < y ‰¤ 0.2). The oxidation catalyst of the present invention contains the layered composite oxide, the diesel particulate filter of the present invention includes the oxidation catalyst and an integral structure-type support coated with the oxidation catalyst, the ternary catalyst of the present invention contains the layered composite oxide, and the nitrogen oxide purification catalyst of the present invention contains the layered composite oxide. |
