【摘 要】
：
Ce-Zr solid solution (CexZr1-xO2,CZO) was prepared by the citric acid sol-gel method.The CZO was then used as a support for Pd/CZO catalysts for the oxidative c
【机 构】
：
Hebei Provincial Key Laboratory of Green Chemical Technology and High Efficient Energy Saving,School
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Ce-Zr solid solution (CexZr1-xO2,CZO) was prepared by the citric acid sol-gel method.The CZO was then used as a support for Pd/CZO catalysts for the oxidative carbonylation of phenol to diphenyl carbonate.The Pd/CZO catalyst showed enhanced activity and diphenyl carbonate selectivity compared with the Pd/CeO2 catalyst.The catalytic performance of Pd/CZO was influenced by the calcination temperature of the CZO support.X-ray diffraction,scanning electron microscopy,N2 adsorption-desorption measurements,X-ray photoelectron spectroscopy and H2 temperature-programmed reduction measurements were used to investigate the effects of Zr doping and calcination temperature.The catalytic performance of Pd/CZO and Pd/CeO2 for the oxidative carbonylation of phenol was affected by several factors,including the specific surface area,Ce3+ and/or oxygen vacancy content,oxygen species type and Pd(Ⅱ) content of the catalyst.All these properties were influenced by Zr doping and the calcination temperature of the CZO support.
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