Enhanced CO oxidation and toluene oxidation on CuCeZr catalysts derived from UiO-66 metal organic frameworks

In this work, several MxOy-supported ZrO2 (MxOy = CuO, CeO2, CuO-CeO2) catalysts were prepared through the direct decomposition of metal organic frameworks UiO-66 in air. The catalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), N-2 adsorption-desorption isotherms and H-2-temperature programmed reduction (H-2-TPR). The catalytic performance for CO oxidation and toluene oxidation over Zr based catalysts was investigated. Amongst the prepared catalysts, CuCeZr catalyst displayed excellent CO oxidation and toluene oxidation performance. The addition of Cu was favorable to the enhancement of catalytic performance. Importantly, the addition of cerium led to the formation of easily reducible surface copper species, consequently improving the CO oxidation and toluene oxidation performance.