CeO2/CuO catalysts using different template agent for preferential CO oxidation in H2-rich stream

Abstract The CeO 2 /CuO catalysts using different template agent (F68 L64, F127 and P123) were synthesized by the simple template and impregnation method. They were characterized by FESEM, XRD, N 2 physisorption and H 2 -TPR techniques. It is found that the CeO 2 /CuO catalysts are double pore distribution, and CeO 2 can enter into the gap of CuO supports and form the contact interface of copper and cerium. Among the as-prepared catalysts, the CeO 2 /CuO-F127 catalyst displays better activity at lower temperature and the CeO 2 /CuO-P123 catalyst presents higher activity at higher temperature. The CeO 2 /CuO-P123 catalyst has the smallest crystallite sizes of CuO and CeO 2 as well as the largest size of cubes, which may improve the interaction of copper and cerium and enhance the performance of CO oxidation.