Patent ID: 9352301
Filing Date: 2016-05-31
CPC Classification: B01D,B01J

Claim Text:
1. An exhaust gas purification catalyst, comprising: a first catalyst in which an oxide of general formula (1) is supported by an oxide configured to occlude and release oxygen, where La is lanthanum, M is at least one selected from a group consisting of barium (Ba), strontium (Sr) and calcium (Ca), M′ is at least one selected from a group consisting of iron (Fe), cobalt (Co), nickel (Ni) and manganese (Mn), δ is the amount of oxygen defect, and x and δ satisfy 0<x≦1 and 0≦δ≦1; and a second catalyst containing a noble metal, wherein a particle size of the oxide configured to occlude and release oxygen is within a range from 1 to 50 nm, and a particle size of the oxide of the general formula (1) is within a range from 1 to 30 nm.