| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust gas cleaning catalyst capable of efficiently cleaning the hydrocarbon, carbon monoxide and SOF in an exhaust gas of an internal combustion engine including a diesel engine and to provide its manufacturing method. SOLUTION: The exhaust gas cleaning catalyst is obtained by coating a catalyst component on an integrated structure type carrier, and the catalyst component contains a hydrocarbon adsorbing marital and a noble metal deposited on a heat resistant inorganic oxide carrier, and in which particles different in noble metal particle size coexist. In the manufacturing method for the exhaust gas cleaning catalyst, an organic acid is contained in a noble metal salt aqueous solution so that a molar ratio of the organic acid and the noble metal may be a fixed range, and the noble metal is deposited on the heat resistant inorganic oxide carrier. |
