Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2009, Vol. 30 ›› Issue (12): 1215-1221.

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Functionalized Poly(ethylene glycol)-Stabilized Palladium Nanoparticles for Se-lective Oxidation of Alcohols in Supercritical Carbon Dioxide

WANG Xiangrui1, FENG Bo1, YANG Hanmin2, HOU Zhenshan1,*, ZHAO Xiuge1, HU Yu1, QIAO Yunxiang1, LI Huan1, PAN Zhenyan1   

  1. 1Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China 2Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Educa-tion, South-Central University for Nationalities, Wuhan 430074, Hubei, China
  • Received:2009-12-25 Online:2009-12-25 Published:2013-09-29

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Abstract: The aerobic oxidation of various alcohols to the corresponding aldehydes or ketones was carried out using stabilized palladium nanoparticles in a supercritical carbon dioxide (scCO2)/poly(ethylene glycol) (PEG-2000) biphasic system. The effects of reaction conditions on catalytic activity were investigated in detail. Among the Pd nano-catalysts reduced with different reductants, Pd nanoparticles obtained by H2 reduction showed the best catalytic performance in the oxidation of benzyl alcohol. The products can be easily extracted with scCO2 in situ from the Pd nano-catalyst immobilized in functionalized poly(ethylene glycol), and therefore the loss of palladium could be eliminated. The conversion reached 98% after the catalyst was reused 5 times.

Key words: supercritical carbon dioxide, poly(ethylene glycol), alcohol, aerobic oxidation, palladium nanoparticle