| 摘要 |
PURPOSE:To obtain a production method of catalyst for purification of exhaust gas which can simultaneously remove hydrocarbons, carbon monoxide and nitrogen oxides exhausted from an internal combustion engine such as an automobile even at a low temp. and has excellent durability even when used under severe conditions such as an oxidizing, atmosphere at high temp. CONSTITUTION:This catalyst for purification of exhaust gas consists of a one- body structure coated with a catalyst component. This catalyst component contains a refractory inorg. oxide to which barium is fixed, platinum metals, and cerium compds. The inorg. oxide with barium fixed is obtd. by impregnating a refractory inorg. oxide with a barium salt soln. and treating the impregnated material with sulfuric acid. Or, the refractory inorg. oxide may be added. |
