Abstract: The present invention relates to a catalyst for the oxidation of ammonia (AMOX catalyst), wherein the catalyst comprises as components: (a) Pt and/or Pd as one or more platinum group metals, wherein the one or more platinum group metals are supported on a support material; (b) one or more rare earth metal oxides selected from the group of oxides of Pr, Nd, and Ce, including combinations of two or more thereof; (c) one or more transition metal oxides selected from the group consisting of oxides of Mn, Ti, V, Nb, and Ta, including combinations of two or more thereof; (d) one or more zeolitic materials; and (e) optionally one or more binders; wherein the one or more zeolitic materials are loaded with Cu and/or Fe. The present invention also relates to an exhaust gas treatment system comprising the inventive catalyst for the oxidation of ammonia, as well as to a process for the preparation of a catalyst for the oxidation of ammonia, and to the use of the inventive catalyst.

Abstract: The present invention relates to a catalyst for the treatment of an exhaust gas of a diesel combustion engine, said catalyst particularly comprising a specific substrate and a coating disposed on the surface of the internal walls of said substrate, the coating particularly comprising a specific first non-zeolitic oxidic material, and a specific zeolitic material comprising Fe and Cu, wherein the catalyst exhibits a weight ratio of Fe, calculated as Fe2O3, relative to Cu, calculated as CuO, Fe2O3:CuO, of less than 0.1:1. Further, the present invention relates to a specific process for preparing said catalyst. Yet further, the present invention relates to a system comprising said catalyst and to a use thereof.