| abstract |
(57) [Abstract] [Objective] To efficiently reduce and remove nitrogen oxides from combustion exhaust gas containing oxygen in excess of the theoretical reaction amount to unburned components such as nitrogen oxides, carbon monoxide, hydrogen, and hydrocarbons. To provide an exhaust gas purifying material that can be used. [Constitution] A porous inorganic oxide containing silver and / or Or a first catalyst supporting a silver compound or a mixture thereof, a second catalyst supporting copper oxide and / or sulfate as an active species on a porous inorganic oxide, Pt, Pd, Ru, Rh, Ir and An exhaust gas purifying material comprising a third catalyst carrying at least one element selected from the group consisting of Au, wherein the first catalyst faces an exhaust gas inflow side, and the second catalyst and A mixed catalyst obtained by mixing the third catalyst faces the exhaust gas outflow side. |