Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (11): 1909-1917.DOI: 10.1016/S1872-2067(17)62917-6

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Carbon film encapsulated Fe2O3:An efficient catalyst for hydrogenation of nitroarenes

Yingyu Wanga, Juanjuan Shia, Zihao Zhangb, Jie Fub, Xiuyang Lüb, Zhaoyin Houa   

  1. a Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemistry, Zhejiang University, Hangzhou 310028, Zhejiang, China;
    b Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China
  • Received:2017-08-02 Revised:2017-09-17 Online:2017-11-18 Published:2017-11-24
  • Contact: 10.1016/S1872-2067(17)62917-6
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21473155, 21273198) and Natural Science Foundation of Zhejiang Province (LZ12B03001).

Abstract:

Iron catalysis has attracted a wealth of interdependent research for its abundance, low price, and nontoxicity. Herein, a convenient and stable iron oxide (Fe2O3)-based catalyst, in which active Fe2O3 nanoparticles (NPs) were embedded into carbon films, was prepared via the pyrolysis of iron-polyaniline complexes on carbon particles. The obtained catalyst shows a large surface area, uniform pore channel distribution, with the Fe2O3 NPs homogeneously dispersed across the hybrid material. Scanning electron microscopy, Raman spectroscopy and X-ray diffraction analyses of the catalyst prepared at 900℃ (Fe2O3@G-C-900) and an acid-pretreated commercial activated carbon confirmed that additional carbon materials formed on the pristine carbon particles. Observation of high-resolution transmission electron microscopy images also revealed that the Fe2O3 NPs in the hybrid were encapsulated by a thin carbon film. The Fe2O3@G-C-900 composite was highly active and stable for the direct selective hydrogenation of nitroarenes to anilines under mild conditions, where previously noble metals were required. The synthetic strategy and the structure of the iron oxide-based composite may lead to the advancement of cost-effective and sustainable industrial processes.

Key words: Carbon film, Encapsulation, Iron catalysis, Pyrolysis, Hydrogenation, Nitroarene