Solid-State Construction of CuO(x)/Cu(1.5)Mn(1.5)O(4) Nanocomposite with Abundant Surface CuO(x) Species and Oxygen Vacancies to Promote CO Oxidation Activity

Carbon monoxide (CO) oxidation performance heavily depends on the surface-active species and the oxygen vacancies of nanocomposites. Herein, the CuO(x)/Cu(1.5)Mn(1.5)O(4) were fabricated via solid-state strategy. It is manifested that the construction of CuO(x)/Cu(1.5)Mn(1.5)O(4) nanocomposite can produce abundant surface CuO(x) species and a number of oxygen vacancies, resulting in substantially enhanced CO oxidation activity. The CO is completely converted to carbon dioxide (CO(2)) at 75 °C when CuO(x)/Cu(1.5)Mn(1.5)O(4) nanocomposites were involved, which is higher than individual CuO(x), MnO(x,) and Cu(1.5)Mn(1.5)O(4). Density function theory (DFT) calculations suggest that CO and O(2) are adsorbed on CuO(x)/Cu(1.5)Mn(1.5)O(4) surface with relatively optimal adsorption energy, which is more beneficial for CO oxidation activity. This work presents an effective way to prepare heterogeneous metal oxides with promising application in catalysis.