| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal combustion exhaust gas purifying catalyst of higher activities and temperature change stability compared with well-known catalysts. SOLUTION: A catalyst is provided with two catalyst activity layers on a substrate, and a first layer contains several fine solids, one or more of highly dispersible alkali earth metal oxide and at least one platinum group metal, and fine solids are provided with at least one fine oxygen storage material and at least another fine component, and the platinum group metal is brought into contact closely with all the components in the first layer. |
