Preferential oxidation properties of CO in excess hydrogen over CuO-CeO2 catalyst prepared by hydrothermal method

✍ Scribed by Pengfei Zhu; Jing Li; Shufeng Zuo; Renxian Zhou

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 254 KB
• Volume: 255
• Category: Article
• ISSN: 0169-4332
• DOI: 10.1016/j.apsusc.2008.08.033

✦ Synopsis

A C T CuO-CeO 2 catalysts were prepared by hydrothermal method. The influence of Cu loadings on the catalytic performance of CuO-CeO 2 catalysts for the preferential oxidation of CO in excess H 2 has been studied and their physicochemical properties were characterized by X-ray powder diffraction (XRD), H 2 -TPR, Ultraviolet-Raman (UV-Raman), Temperature-programmed surface reaction (CO-TPSR) and X-ray photoelectron spectroscopy (XPS) techniques. The results show that the 5.0 wt% CuO-CeO 2 catalyst exhibits the highest catalytic activity, and the CO conversion achieves 99.6% at 130 8C. There are many forms of CuO x species, such as CuO x species strongly interacting with CeO 2, the highly dispersed CuO x species on the surface of CeO 2 , and the bulk CuO or Cu + species. Cu + species on the CuO-CeO 2 catalysts are advantageous to promote the catalytic performance indirectly.