Abstract: A process of forming a direct NOx catalyst includes the steps of providing a palladium salt, providing a silicon oxide support material, mixing the palladium salt and silicon oxide support material in an aqueous solution, evaporating the aqueous solution forming a solid, calcining the solid, and then exposing the calcined solid to a pretreatment gas at a specified temperature to form a desired direct NOx catalyst. When the process includes exposing the calcined solid to helium gas at a temperature of from 650 to 1000° C. the catalyst may include a mixture of palladium and palladium oxide having a particle size of from 5 to 150 nm where the palladium particles are discrete particles without sintering and the mixture may include 41% by weight palladium oxide and 51% by weight palladium metal.

Abstract: A noble metal-free lanthanum transition metal perovskite catalyst material. The noble metal-free lanthanum transition metal perovskite catalyst material may include a two phase mixture of a lanthanum transition metal perovskite with an alkali or alkaline earth metal carbonate, a lanthanum transition metal perovskite doped with an alkali or alkaline earth metal, or a combination thereof. The lanthanum transition metal perovskite catalyst material provides direct decomposition of NOx into N2 and O2 without the presence of a noble metal and in the presence of excess O2.

Abstract: A process of forming a direct NOx catalyst includes the steps of providing a palladium salt, providing a silicon oxide support material, mixing the palladium salt and silicon oxide support material in an aqueous solution, evaporating the aqueous solution forming a solid, calcining the solid, and then exposing the calcined solid to a pretreatment gas at a specified temperature to form a desired direct NOx catalyst. When the process includes exposing the calcined solid to helium gas at a temperature of from 650 to 1000° C. the catalyst may include a mixture of palladium and palladium oxide having a particle size of from 5 to 150 nm where the palladium particles are discrete particles without sintering and the mixture may include 41% by weight palladium oxide and 51% by weight palladium metal.

Abstract: A three-way catalytic material that reduces NOx in an oxidizing atmosphere and a process for reducing NOx in an oxidizing atmosphere. The material is a mixed metal oxide catalyst and can be made from a doped barium cerate matrix with a chemical formula of BaAyDzCe(1-y-z)O3-?, where A is a precious metal or a combination of two or more precious metals and D is at least one transition metal. The coefficient y has a value between 0.0 and 0.20, inclusive, and the coefficient z has a value between 0.0 and 0.20, inclusive, and ? has a value between 0.00 and 0.20, inclusive.

Abstract: A three-way catalytic material that reduces NOx in an oxidizing atmosphere and a process for reducing NOx in an oxidizing atmosphere. The material is a mixed metal oxide catalyst and can be made from a doped barium cerate matrix with a chemical formula of BaAyDzCe(1-y-z)O3-?, where A is a precious metal or a combination of two or more precious metals and D is at least one transition metal. The coefficient y has a value between 0.0 and 0.20, inclusive, and the coefficient z has a value between 0.0 and 0.20, inclusive, and 8 has a value between 0.00 and 0.20, inclusive.