| 摘要 |
PURPOSE:To obtain a catalyst for purifying an exhaust gas contg. nitrogen oxide, carbon monoxide and hydrocarbons. CONSTITUTION:A catalyst for purifying exhaust gas prepd. by providing the first layer catalyst wherein at least one kind of precious metal selected from a group consisting of platinum, rhodium and palladium is made as an active metal and the second layer catalyst of iridium as an active metal thereon so as to prepare a laminated structure, is provided. |
