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

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Abstract

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.

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.

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Acknowledgements

This work was supported by the Natural Science Foundation of Science and Technology Department of Jilin Province (20130101015JC), the open project supported by State Key Laboratory of Inorganic Synthesis and Preparative Chemistry of Jilin University, the Innovation Project for the Frontiers of Science and the new interdisciplinary project of Jilin University.

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Authors and Affiliations

  1. Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, Changchun, 130021, People’s Republic of China

    XUE YU, WANCHUN ZHU, SHUANG GAO, JIANBIAO YAN, HONGJING YUAN, LILI CHEN, WENXIANG ZHANG & ZHENLU WANG

  2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, People’s Republic of China

    JIAHUAN LUO

  3. First Hospital of Jilin University, Changchun, 130021, People’s Republic of China

    SHUBO ZHAI

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  1. XUE YU
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YU, X., ZHAI, S., ZHU, W. et al. The direct transformation of ethanol to ethyl acetate over Cu/SiO 2 catalysts that contain copper phyllosilicate. J Chem Sci 126, 1013–1020 (2014). https://doi.org/10.1007/s12039-014-0659-z

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  • DOI: https://doi.org/10.1007/s12039-014-0659-z

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