Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (1): 79-87.DOI: 10.1016/S1872-2067(17)62925-5

• Articles • Previous Articles     Next Articles

A MoS2 nanocatalyst with surface-enriched active sites for the heterogeneous transfer hydrogenation of nitroarenes

Jia Wanga,b, Yajie Zhanga,c, Jiangyong Diaoa, Jiayun Zhanga,c, Hongyang Liua, Dangsheng Sua,d   

  1. a Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China;
    b State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China;
    c School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, Liaoning, China;
    d Energy Research Resources Division, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2017-08-30 Revised:2017-09-28 Online:2018-01-18 Published:2018-01-19
  • Contact: 10.1016/S1872-2067(17)62925-5
  • Supported by:

    This work was supported by the Ministry of Science and Technology (MOST, 2016YFA0204100 and 2011CBA00504), the National Natural Science Foundation of China (21573254, 91545110), the Youth Innovation Promotion Association (CAS), and the Sinopec China.

Abstract:

A highly efficient and reusable plane-curved and interlayer-expanded MoS2 nanocatalyst with increased exposure of active sites was prepared. The catalyst was used for the heterogeneous hydrogen transfer reaction of nitroarenes with hydrazine monohydrate as a reductant under mild reaction conditions without pressure and base, which was different from other hydrogen transfer systems that require the presence of a base (e.g., propan-2-ol/KOH). The sandwiching of carbon between the MoS2 nanosheets increased the distance between the layers of MoS2 and exposed more Mo sites, resulting in superior catalytic performance compared with that of bulk MoS2 catalyst. The active hydrogen (H*) generated from N2H4 could directly transfer to the -NO2 groups of nitrobenzene to form aniline followed by N2 emission, which was confirmed by detecting the gas emission with mass spectrometry during the decomposition of hydrazine or the co-existence of nitrobenzene and hydrazine.

Key words: Molybdenum disulfide, Interlayer expansion, Hydrogen transfer reaction, Nitrobenzene reduction, Alkali-free