Chemical Research in Chinese Universities ›› 2017, Vol. 33 ›› Issue (4): 660-665.doi: 10.1007/s40242-017-6345-1

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Preparation of Pt/γ-Al2O3-C Heterogeneous Catalyst for Highly Selective Hydrogenation of Cinnamaldehyde Towards Cinnamyl Alcohol

MA Jun1,2,3, LAN Yang1, MAO Hui1,2,3, LIAO Yang1,2,3, ZHAO Shilin1,2,3   

  1. 1. College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, P. R. China;
    2. Engineering Research Center for the Development of Farmland Ecosystem Service Functions, Sichuan Province Institutions of Higher Education, Chengdu 610068, P. R. China;
    3. Sichuan Province Institutions of Higher Education and Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education, Chengdu 610068, P. R. China
  • Received:2016-08-18 Revised:2017-02-20 Online:2017-08-01 Published:2017-04-11
  • Contact: LIAO Yang, ZHAO Shilin E-mail:liaoyang_sicnu@163.com;zhaoslin@aliyun.com
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.51173122),the Foundation of the Education Department of Sichuan Province,China(No.16ZA0049) and the Foundation of the Science and Technology Commission of Sichuan Province,China(No.2016JY0259).

Abstract:

A Pt/γ-Al2O3-C heterogeneous catalyst with improved catalytic performance was successfully prepared. Bayberry tannin(BT), an abundant natural plant polyphenol, was utilized to modifiy the surface of the γ-Al2O3 matrix and then stabilize Pt nanoparticles(NPs). The catalyst was systematically and specifically characterized by a collection of analytic tools including XRD, XPS, FTIR, TEM, and TG. It was found that the Pt NPs were envenly dispered on the γ-Al2O3-C matrix. Meanwhile, when the catalyst was applied for selective hydrogenation of cinnamaldehyde(CMA) in the presence of KOH promoter in solvent, excellent catalytic performance was obtained. The selectivity to cinnamyl alcohol(CMO) reached 97.88% with 88.45% CMA conversion within 30 min in the presence of 0.037 mol/L KOH, without significant loss of catalytic activity even under cyclic measurements for 5 times. The excellent catalytic performances should be ascribed predominantly to the uniform and stable dispersion of Pt NPs on the γ-Al2O3-C matrix and the excellent heat stability of BT.

Key words: Heterogeneous catalyst, Pt/γ-Al2O3-C, Barberry tannin, Selective hydrogenation, Cinnamaldehyde