Functionalized Poly(ethylene glycol)-Stabilized Palladium Nanoparticles as an Efficient Catalyst for Aerobic Oxidation of Alcohols in Supercritical Carbon Dioxide/Poly(ethylene glycol) Biphasic Solvent System

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• 作者：Xiangrui Wang ; Hanmin Yang ; Bo Feng ; Zhenshan Hou ; Yu Hu ; Yunxiang Qiao ; Huan Li and Xiuge Zhao
• 关键词：Poly(ethylene glycol) ; Supercritical carbon dioxide ; Alcohol oxidation ; Palladium nanoparticles
• 刊名：Catalysis Letters
• 出版年：2009
• 出版时间：September, 2009
• 年：2009
• 卷：132
• 期：1-2
• 页码：34-40
• 全文大小：595.9 KB

文摘

The functionalized Poly(ethylene glycol) (PEG)-stabilized Pd(0) nanoparticles have been utilized to selectively oxidize alcohols to the corresponding aldehydes or ketones in supercritical carbon dioxide (scCO₂)/PEG (PEG-2000) biphasic system. It was demonstrated that the Pd(0) nanocatalyst was more active and selective, in comparison with the commercially available Pd/C catalyst, PVP-stabilized Pd nanocatalyst and Pd(0) catalyst without stabilization. The effects of CO₂ pressure, reaction time and temperature on activity and selectivity were also further investigated in detail. The scCO₂/PEG biphasic system was proved to be not only cheap and clean, but also recyclable for the aerobic oxidation of alcohols.