| abstract |
A novel NO X purification catalyst capable of exhibiting NO X purification performance in a low temperature and / or oxidizing atmosphere is provided. A catalyst for purifying nitrogen oxides discharged from an internal combustion engine such as a gasoline engine or a diesel engine, wherein a Au atom and a Fe atom exist in a solid state in a solid, that is, Au A catalyst that is in contact with one atom of an atom and an Fe atom and at least one of the other atom is present in a solid, for example, a nanoparticle (primary particle) or in a thin film. [Selection figure] None |