| 摘要 |
<p>Provided are a layered complex oxide which can lower PM oxidation temperature and increase oxidation speed, and a nitrogen oxide purification catalyst, a three-way catalyst, a DPF, and an oxidation catalyst using such a layered complex oxide. A layered complex oxide having a layered perovskite structure and a composition represented by the formula: (Ln3-XAX)1-aMn2O7-d (in the formula, Ln represents La and/or Nd, A represents Sr and/or Ca, a represents the A-site deficit amount, d represents the oxygen deficit amount, and X satisfies the relationship 0<X<3, a satisfies the relationship 0<a<1, and d satisfies the relationship d<1.4). Various catalysts and a DPF are configured using the complex oxide.</p> |
