Abstract
Abstract In this work, we have reported the influence of the addition of base (KOH) on the physic-ochemical property of ceria synthesized by alcohothermal process, and the alcohothermal mechanism was also put forward. Furthermore, the prepared CeO 2 was used as the support to prepare CuO/CeO 2 catalysts via the wet impregnation method. The samples were characterized by N 2 adsorption-desorption, X-ray powder diffraction (XR.D), high resolution transmission electron microscopy (HRTEM), and temperature-programmed reduction by Eb (H 2-TPR). The catalytic properties of the CuO/CeO 2 catalysts for low-temperature CO oxidation were studied using a microreactor-GC system. The crystal size of CeO 2-A was much smaller than that of CeO 2-B, and the corresponding copper oxide catalysts exhibited higher catalytic activity than that of the CeO 2-B-supported catalysts under the same reaction conditions. The alcohothermal mechanism indicated that KOH plays a key role in determining the physicochemical and catalytic properties of ceria-based materials.
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