Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (12): 2542-2549.doi: 10.3866/PKU.WHXB201706151

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Radiation Induced Synthesis of Amorphous Molybdenum Sulfide/Reduced Graphene Oxide Nanocomposites for Efficient Hydrogen Evolution Reaction

Pengfei CAO1,Yang HU1,Youwei ZHANG2,Jing PENG1,Maolin ZHAI1,*()   

  1. 1 Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
    2 Aviation Key Laboratory of Science and Technology on Stealth Materials, Beijing Institute of Aeronautical Materials, Beijing 100095, P. R. China
  • Received:2017-05-03 Published:2017-09-05
  • Contact: Maolin ZHAI E-mail:mlzhai@pku.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(11405168);the National Natural Science Foundation of China(11505011)

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Abstract:

Molybdenum sulfide is an efficient catalyst for the hydrogen evolution reaction (HER) and its synthesis has attracted significant attention in recent years. In this work, molybdenum sulfide/reduced graphite oxide (MoSx/RGO) was prepared by the γ-ray induced reduction of ammonium tetrathiomolybdate and graphite oxide. The composition, morphology, and structure of the MoSx/RGO composites were determined by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), transmission electron microscopy (TEM), and Raman spectroscopy. The results confirmed the formation of amorphous MoSx/RGO composites. Subsequently, the effects of the absorbed dose and precursor ratio on the performance of the composite material as the catalyst for HER were studied systematically. The resultant MoSx/RGO composites were found to show excellent catalytic activity towards HER. With a catalyst loading of 0.275 mg·cm-2, an onset overpotential of 110 mV, a Tafel slope of 46 mV·dec-1, and a current density of 10 mA·cm-2 at the overpotential of 160 mV can be achieved. These results can be considered as the proof of Volmer-Heyrovesy mechanism. In addition, the MoSx/RGO catalyst also showed an excellent long-time stability during the evaluation for HER.

Key words: Molybdenum sulfide, Reduced graphene oxide, Radiation synthesis, Hydrogen evolution reaction, Volmer-Heyrovesy mechanism