Catalytic oxidation of NO over Ce-doped Mn/TiO2

Mn-Ce/TiO₂ catalyst was prepared by impregnating Mn-Ce on TiO₂ and was characterized by XRD，BET and PL. The influences of Ce-doping concentration，loading，calcinations temperature，space velocity，inlet concentration of NO and volume fraction of oxygen on the performance of catalytic oxidation were examined. The results showed that the effect of doping Ce not only increased the surface area of MnO_x/TiO₂ but also enhanced the dispersion of active phase over TiO₂. At Ce-doping concentration of [Ce]/[Mn]=1/3，10% loading Mn-Ce/TiO₂ catalyst calcined at 300 ℃ for 3 h had high catalytic oxidation activity. When inlet concentration of NO was 300 μL/L，O₂ 10%，space velocity was 41000 h^－1，oxidation rate of NO over Mn-Ce/TiO₂ reached 58% at 200 ℃.