Patent ID: 8877675
Filing Date: 2014-11-04
Classification: B01D,B01J,F01N,Y02T

Abstract:
1. An exhaust gas purifying catalyst, comprising: noble metal particles, first oxide particles on which the noble metal particles are supported, second oxide particles which envelop the first oxide particles on which the noble metal particles are supported, and at least one type of compound particles selected from the group consisting of: a transition element, an alkali earth metal element, an alkali metal element, and a rare earth element, wherein the at least one type of compound particles include promoter components, wherein the second oxide particles contain alumina, wherein the promoter components are located on an outside or periphery of the second oxide particles, and wherein the noble metal particles and the first oxide particles are in a section separated from other sections by the second oxide particles so as to suppress movement of first oxide particles beyond the section separated by the second oxide particles, and so as to suppress contact and coagulation of the section with the other sections wherein a capacity of pores with a pore diameter of 100 nm or less of the exhaust gas purifying catalyst is 0.2 cm