Chlorobenzene Destruction over Mesostructured CuO and MnO sub(x) Co-Modified CeO sub(2) Catalyst: Activity and Activation Route

Mesostructured CuMnCeO sub(x) catalysts were prepared and tested in chlorobenzene destruction. Mn and Cu phases enter CeO sub(2) 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 degree 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.