Chlorobenzene destruction over mesostructured CuO and mn[O.sub.x] co-modified Ce[O.sub.2] catalyst: activity and activation route

Mesostructured CuMnCe[O.sub.x] catalysts were prepared and tested in chlorobenzene destruction. Mn and Cu phases enter Ce[O.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°C. Enhanced oxygen concentration and mobility, and abundant oxygen vacancy promote the desorption of adsorbed Cl, which guarantees the superior stability of CuMnCe[O.sub.x]. Incorporation of CuO and Mn[O.sub.x] effectively inhibits the formation of organic byproducts, such as phenolates, maleates, and o-benzoquinone, especially at elevated temperatures. Keywords Catalytic oxidation * Chlorobenzene * Mesostructured CuMnCe[O.sub.x] * Surface chlorine * Activation route