Effect of Zr-doping on Pd/CexZr1-xO2 catalysts for oxidative carbonylation of phenol

• 作者: Fang Li Gang Feng Lichao Zhou Wei Xue Xiaojing Liu Yanji Wang Zhimiao Wang
• 来源期刊: 中国化学工程学报（英文版）
• 年，卷（期）: 2020,（10）
• 所属期刊栏目: Catalysis, Kinetics and Reaction Engineering
• 页码范围: 2592-2599
• 页数: 8页
• 语种: 英文

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 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.