Effects of cerium precursors on surface properties of mesoporous CeMnO_x catalysts for toluene combustion

更新时间:2023-05-28

【摘要】Mesoporous CeMnOx composite oxides catalysts were prepared by surfactant-assisted co-precipitation method and used for the catalytic oxidation of toluene.The effect of different cerium precursors[Ce（NO3）3 and（NH4）2 Ce（NO3）6] on catalyst structure,surface properties and toluene combustion activities of mesoporous CeMnOx catalysts were investigated.The Ce（Ⅲ）MnOx catalyst prepared from Ce（NO3）3 precursor shows higher catalytic activity,with a 90% conversion temperature of 240℃,which is better than the Ce（Ⅳ）MnOx catalyst derived from（NH4）2 Ce（NO3）6] precursor.On the basis of characterizations,it reveals that abundant surface content of Mn4+,better redox behavior and larger concentration of surface active oxygen species are responsible for the excellent catalytic performance.

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