| abstract |
Disclosed herein is a catalyst composition for inhibiting the generation of NO2, comprising a basic metal oxide catalyst composition combined with ceria-cobalt oxide, active alumina, and zeolite, wherein the basic metal oxide catalyst composition is supported with a precious metal, such as platinum and/or palladium, and a non-precious metal, such as barium or strontium, and a module for inhibiting the generation of NO2 using the catalyst composition. In the exhaust gas aftertreatment system, in which a DOC and a CSF are serially disposed, the module is disposed at the rear end of the CSF, so that the generation of NO2 is prevented, with the result that the emission of visible exhaust gas is prevented, thereby contributing to environmental purification. |