| 摘要 |
The invention relates to an ordered mesoporous or mesostructured material comprising a mineral phase in which at least partially crystalline nanometric-sized particles are dispersed. The inventive material is characterised in that it also comprises at least one additive which is selected from the group containing alkalines, alkaline-earths and manganese, said additive being present on the surface of the mineral phase and/or of the particles. The material is obtained using a method in which an ordered mesoporous or mesostructured material is formed comprising a mineral phase in which at least partially crystalline nanometric-sized particles are dispersed. Said material is subsequently impregnated with a solution or suspension comprising the aforementioned additive, the solution or suspension having a maximum pH of 8.5 and a minimum additive concentration of 0.5 M. Finally, the impregnated material is calcined. Said material can be used as a catalyst in order, for example, to treat exhaust gas from internal combustion engines or to treat gas for the reduction of nitrogen oxide emissions. |
