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To preferably catalyze the oxidation of NO to NO2 in diesel after-treatment system, a series of CeO2-MnOx composite oxides was supported on silica-alumina material by the co-impregnation method. The maximum conversion of NO of the catalyst with a Ce/Mn weight ratio of 5:5 was improved by around 40%, compared to the supported manganese-only or cerium-only sample. And its maximum reaction rate was 0...
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