Chinese Journal of Catalysis ›› 2015, Vol. 36 ›› Issue (9): 1623-1630.DOI: 10.1016/S1872-2067(15)60869-5

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An investigation of the effects of CeO2 crystal planes on the aerobic oxidative synthesis of imines from alcohols and amines

Zhixin Zhanga,b, Yehong Wangb, Min Wangb, Jianmin Lüb, Lihua Lib, Zhe Zhangb, Mingrun Lib, Jingyang Jianga, Feng Wangb   

  1. a State Key Laboratory of Fine Chemicals, College of Chemistry, Faculty of Chemical Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China;
    b State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2015-03-27 Revised:2015-04-19 Online:2015-08-28 Published:2015-09-26
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21403216, 21303189, 21422308), and Hundred Person Project of the Chinese Academy of Sciences.

Abstract:

We herein report the effects of CeO2 crystal planes on the oxidative coupling of alcohols and amines to form imines. CeO2 exhibits significant catalytic activity under mild reaction conditions (60℃) during the synthesis of 13 different imines, giving >89% conversions and >90% selectivities. The crystal planes of CeO2 greatly affect the catalytic performance. Among the crystal planes investigated (the (110), (100) and (111) planes), the (110) plane shows the strongest redox ability and thus the best catalytic activity, generating a 97% yield of the imine at 60℃ in 2 h, because it contains the highest concentration of oxygen vacancies.

Key words: Ceria, Crystal plane effect, Oxidative coupling, Imine, Defect site