| 摘要 |
PROBLEM TO BE SOLVED: To provide a three-way catalyst including an extrusion solid body for treating an exhaust gas generated from an internal combustion engine used in a fixed generation source and a movable type apparatus fields (i.e., vehicle(automobile)).SOLUTION: There is provided an oxydation catalyst, e.g., comprising an extrusion solid body containing at least one binder/matrix component of 10 to 100 wt.% and zeolite, non-zeolite molecular sieve or two or more mixture thereamong of 5 to 90 wt.%, and comprising at least one noble metal and at least one non-noble metal according to circumstances, in which one metal is present over the whole of the extrusion solid body, is present on the surface of the extrusion solid body at a higher concentration, and is stored in one or more coating layers on the surface of the extrusion solid body. |
