Abstract: Described is a method for preparing a NOx storage-reduction catalyst article that includes a ruthenium composite as an active ingredient, and an exhaust treatment system including same. Proposed is a stable preparation method or an on-site simultaneous preparation method which is simplified as well as capable of preparing an NSR article exhibiting an equal level of activity, the method in which the NSR article is prepared by preliminarily preparing a heat-resistant ruthenium composition, mixing the same with de-NOxing components and applying same on a carrier.

Abstract: Disclosed is a heat-resistant ruthenium composite and, more particularly, to a heat-resistant ruthenium composite, a catalyst using same, and an exhaust system, the heat-resistant ruthenium composite being composed of a matrix including a plurality of cores therein, wherein ruthenium is present in a metal state in the core and a Ru complex oxide including Ru perovskite (PV) is contained in the matrix.

Abstract: Disclosed is a NOx-trapping catalyst having a non-platinum-group-metal NOx-trapping layer, which contains a transition metal, particularly manganese, able to maintain NOx-trapping performance while decreasing the amount of expensive platinum-group metal.

Abstract: The present invention relates to a method for preparing a supported catalyst comprising a crystalline Pd—Rh alloy, the method comprising the steps of: (i) producing an impregnated support by means of mixing an inorganic support, a Pd precursor solution and an Rh precursor solution; and (ii) thermally treating the impregnated support in a reducing gas atmosphere.

Abstract: Proposed is a reformed zeolite and a catalyst composite using the reformed zeolite which have improved heat resistance and are used in a selective catalytic reduction (SCR) catalyst using ammonia or urea as a reducing agent, in a filter-type selective catalytic reduction (SDPF) catalyst in which a filter is coated with the SCR catalyst, or in a lean nitrogen oxide diesel oxidation catalyst (NA-DOC). In the reformed zeolite and the catalyst composite, alumina components, which are a zeolite coating material, improve heat-resistance of the zeolite and promote catalytic efficiency in a high-temperature condition.

Abstract: Disclosed is a NOx-trapping catalyst having a non-platinum-group-metal NOx-trapping layer, which contains a transition metal, particularly manganese, able to maintain NOx-trapping performance while decreasing the amount of expensive platinum-group metal.

Abstract: The present invention relates to a method for preparing a supported catalyst comprising a crystalline Pd—Rh alloy, the method comprising the steps of: (i) producing an impregnated support by means of mixing an inorganic support, a Pd precursor solution and an Rh precursor solution; and (ii) thermally treating the impregnated support in a reducing gas atmosphere.