The direct transformation of ethanol to ethyl acetate over Cu/SiO 2 catalysts that contain copper phyllosilicate

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• 作者：XUE YU (1)
  SHUBO ZHAI (3)
  WANCHUN ZHU (1)
  SHUANG GAO (1)
  JIANBIAO YAN (1)
  HONGJING YUAN (1)
  LILI CHEN (1)
  JIAHUAN LUO (2)
  WENXIANG ZHANG (1)
  ZHENLU WANG (1)
  
• 关键词：Ethanol ; ethyl acetate ; copper phyllosilicate ; lewis acid sites
• 刊名：Journal of Chemical Sciences
• 出版年：2014
• 出版时间：July 2014
• 年：2014
• 卷：126
• 期：4
• 页码：1013-1020
• 全文大小：1,067 KB
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• 作者单位：XUE YU (1)
  SHUBO ZHAI (3)
  WANCHUN ZHU (1)
  SHUANG GAO (1)
  JIANBIAO YAN (1)
  HONGJING YUAN (1)
  LILI CHEN (1)
  JIAHUAN LUO (2)
  WENXIANG ZHANG (1)
  ZHENLU WANG (1)
  
  1. Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, Changchun, 130021, People鈥檚 Republic of China
  3. First Hospital of Jilin University, Changchun, 130021, People鈥檚 Republic of China
  2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, People鈥檚 Republic of China
  
• ISSN：0973-7103

文摘

Cu/SiO2 catalysts that contain copper phyllosilicate, were successfully prepared using the ammonia-evaporation method. The catalysts were characterized via XRD, ICP, BET, FTIR, TPR, XPS, NH3-TPD and FTIR of Pyridine Adsorption techniques. The results demonstrated that the formation of the copper phyllosilicate species significantly affected the structural properties and caused the CuO nanoparticles to become highly dispersed, and the copper phyllosilicate would provide access to the Lewis acidic Cu+ species. It was found that the catalyst with a 23.7 wt% copper loading exhibited the best ethanol conversion and ethyl acetate selectivity. When compared to a catalyst with the same copper loading which was prepared with the impregnation method, the higher activity and selectivity of catalysts might be ascribed to the homogenous distribution of copper nanoparticles, which was the active site for the dehydrogenation, and the amount of Lewis acidic Cu+ sites active for esterification. The synergetic effect between the Cu0 and Lewis acidic sites was the key factor to achieve direct transformation of ethanol to ethyl acetate. Graphical Abstract Cu/SiO2 catalysts, which contain copper phyllosilicate, were successfully prepared using the ammonia-evaporation method. Copper phyllosilicate species caused the CuO nanoparticles to become highly dispersed, and they would provide access to the Lewis acidic Cu+ species. Synergetic effect between Cu0 and Lewis acidic sites was the key factor for the reaction.