| abstract |
(57) [Summary] [Object] The present invention eliminates harmful components contained in exhaust gas from an internal combustion engine such as an automobile such as carbon monoxide (CO), hydrocarbon (HC) and nitrogen oxide (NOx). The present invention relates to an exhaust gas purifying catalyst that is simultaneously removed. [Composition] (A) Exhaust gas inflow side catalyst and (B) Exhaust gas outflow side catalyst, (A) Exhaust gas inflow side catalyst is precious metal (a) rhodium and platinum, or (b) rhodium , Platinum and palladium, and a catalyst component containing a refractory inorganic oxide (c) are coated on a monolithic structure, and (B) the exhaust gas outflow side catalyst is palladium or an alkaline earth metal oxide. , Cerium oxide, An exhaust gas purification system characterized in that a catalyst component composed of zirconium oxide and a refractory inorganic oxide (d) is coated on an integral structure. |