| 摘要 |
PURPOSE:To provide a catalyst for simultaneously removing hydrocarbons(HC), carbon monoxide(CO) and nitrogen oxides(NOX) in exhaust gas from an internal combustion engine such as an automobile. CONSTITUTION:This catalyst is integrally coated with a catalytic active component which contains palladium and rhodium (a) or palladium, rhodium and platinum (b), and alkaline earth metal oxide, lanthanum oxide, cerium oxide, zirconium oxide, and refractory inorg. oxides. |
