| abstract |
(57) [Abstract] [Objective] A catalyst for purifying exhaust gas containing nitrogen oxides, carbon monoxide and hydrocarbons. [Structure] A first layer catalyst having an active metal of one or more noble metals selected from the group consisting of platinum, rhodium and palladium is provided on a simple substance substrate, and a second layer having iridium as an active metal is provided thereon. An exhaust gas purifying catalyst that is provided in a layered structure. |