| 摘要 |
An exhaust gas purification catalyst includes: a first catalyst unit that consists of a hydrogen generating catalyst including a noble metal and an oxide that contains lanthanum, zirconium and an additional element such as neodymium; a second catalyst unit that consists of an oxygen storage/release material and a perovskite oxide disposed in contact with the oxygen storage/release material and represented by the general formula La x M1 1-x M2O 3-´ , where La is lanthanum, M1 is at least one element selected from the group consisting of barium (Ba), strontium (Sr) and calcium (Ca), M2 is at least one element selected from the group consisting of iron (Fe), cobalt (Co) and manganese (Mn), x satisfies 0 < x ‰¤ 1, and ´ satisfies 0 ‰¤ 8 ‰¤ 1; and a holding material that holds the first catalyst unit and the second catalyst unit in a mutually separated state. |
