Chlorobenzene Destruction over Mesostructured CuO and MnO^sub x^ Co-Modified CeO2 Catalyst: Activity and Activation Route

Mesostructured CuMnCeO^sub x^ catalysts were prepared and tested in chlorobenzene destruction. Mn and Cu phases enter CeO2 matrix with a fluorite-like structure to form Cu-Mn-O-Ce solid solution. Both synthesis protocol and metal-doping content affect the metal state, reducibility, and oxygen distribution of composites. The c^sub 0.15^c^sub 0.15^c^sub 0.7^ sample exhibits the highest activity with 90 % of chlorobenzene oxidized at around 250 °C. Enhanced oxygen concentration and mobility, and abundant oxygen vacancy promote the desorption of adsorbed Cl, which guarantees the superior stability of CuMnCeO^sub x^. Incorporation of CuO and MnO^sub x^ effectively inhibits the formation of organic byproducts, such as phenolates, maleates, and o-benzoquinone, especially at elevated temperatures.