| abstract |
The present invention is a layered complex oxide that is excellent in oxygen ion conductivity and can effectively reduce the PM oxidation temperature without using a noble metal such as platinum, an oxidation catalyst using the same, a DPF, a three-way catalyst, and The purpose and problem is to provide a NOx purification catalyst. And the layered complex oxide of the present invention has the following formula (1): La 1.5 Sr 1.5 Mn 2-y B y O 7 (1) (B in the formula represents Cu and / or Fe, and y satisfies 0 <y ≦ 0.2). The oxidation catalyst of the present invention contains the layered composite oxide, and the diesel particulate filter of the present invention includes the integral catalyst carrier coated with the oxidation catalyst and the oxidation catalyst, and the three-way catalyst of the present invention. Contains the layered complex oxide, and the nitrogen oxide purification catalyst of the present invention contains the layered complex oxide. |