Ce(1-x)Mn(x)O(2) (x=0.1-0.6) mixed oxides were used as supports for preparing 7%CuO/Ce(1-x)Mn(x)O(2) catalysts by impregnation, for use in the total oxidation of benzene. At x=0.1 and 0.2, most of manganese was fixed in the fluorite structure of CeO(2) to form a solid solution. When x exceeds 0.3, some of the manganese appeared as well dispersed MnO(x). The redox interaction between CuO and Ce(0.7)Mn(0.3)O(2) facilitated the activation of surface oxygen for the oxidation of benzene. The defective sites of oxygen on the dispersed MnO(x) also enhanced the adsorption and oxidation of benzene. 7%CuO/Ce(0.7)Mn(0.3)O(2) catalyst was a good candidate for replacing noble metal catalysts for the removal of benzene in low concentrations at low temperature. (C) 2011 Elsevier By. All rights reserved.
