| abstract |
(57) [Abstract] [Purpose] 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 The present invention provides an exhaust gas purifying material and an exhaust gas purifying method that can be used. The present invention relates to an exhaust gas purifying material comprising a first catalyst disposed on an exhaust gas inflow side and a second catalyst disposed on an outflow side, wherein the first catalyst comprises a porous inorganic oxide and a silver component. And a compound of at least one element selected from the group consisting of W, V, Mo, Mn, Nb, and Ta, and the second catalyst is formed of a porous inorganic oxide and silver as an active species. , One or more elements and / or compounds selected from the group consisting of copper and nickel, and one or more elements selected from the group consisting of rare earth elements and alkali metal elements. |