CO oxidation over CuO catalysts supported on CeO2-ZrO2 prepared by microwave-assisted co-precipitation: The influence of CuO content

CeO2-ZrO2 mixed oxide (Ce0.6Zr0.4O2) prepared by microwave-assisted heating co-precipitation was used as a support to prepare a series of CuO/Ce0.6Zr0.4O2 catalysts with various CuO contents (0 wt.%–15 wt.%) via the method of incipient-wetness impregnation. The obtained CuO/Ce0.6Zr0.4O2 samples were characterized by N2 adsorption, XRD, Raman, TEM and H2-TPR technologies, and their catalytic activities for CO oxidation were investigated. The results showed that the activity of CuO/Ce0.6Zr0.4O2 catalyst was strongly influenced by the content of CuO, and the catalyst with 10 wt.% CuO exhibited the best catalytic activity in CO oxidation, which could be attributed to the high dispersion and reducibility of CuO, and high oxygen vacancy concentration in the catalyst.

Catalytic activity for CO oxidation of different CuO/Ce0.6Zr0.4O2 catalysts with various CuO loadings (1) 1%; (2) 5%; (3) 10%; (4) 15%Figure optionsDownload full-size imageDownload as PowerPoint slide