Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (3): 398-404.DOI: 10.1016/S1872-2067(15)61029-4

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Influence of the metal sites of M-N-C (M = Co, Fe, Mn) catalysts derived from metalloporphyrins in ethylbenzene oxidation

Lingling Fua, Yijuan Lua, Zhigang Liua, Runliang Zhub   

  1. a State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, Hunan, China;
    b Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
  • Received:2015-10-15 Revised:2015-11-24 Online:2016-02-29 Published:2016-02-29
  • Contact: Zhigang Liu
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21103045, 1210040, 1103312), State Key Laboratory of Heavy Oil at China University of Petroleum (SKCHOP201504), and Key Laboratory of Mineralogy and Metallogeny of the Chinese Academy of Sciences at Guangzhou Institute of Geochemistry (KLMM20150103).

Abstract:

Transition metal catalysts M-N-C (M = Co, Fe, Mn) were synthesized by a template-free method by heating meso-tetraphenyl porphyrins (i.e. CoTPP, FeTPPCl, MnTPPCl) precursors. The catalysts were characterized by N2 adsorption-desorption, thermogravimetry, high-resolution transmission electron microscopy, and Raman and X-ray photoelectron spectroscopy. The selective oxidation of ethylbenzene with molecular oxygen under a solvent-free condition was carried out to explore the catalytic performance of the M-N-Cs, which exhibited different catalytic performance. That was ascribed to the difference in M (Co, Fe, Mn) and different graphitization degree forming during the heating process, in which M (Co, Fe, Mn) might have different catalytic activity on the formation of the M-N-C catalyst. All the M-N-C composites had remarkable recyclability in the selective oxidation of ethylbenzene.

Key words: M(cobalt, iron, manganese)-N-C, Transition metal, Nitrogen-doped carbon, Porphyrin, Ethylbenzene oxidation