Citation: CAO Pengfei, HU Yang, ZHANG Youwei, PENG Jing, ZHAI Maolin. Radiation Induced Synthesis of Amorphous Molybdenum Sulfide/Reduced Graphene Oxide Nanocomposites for Efficient Hydrogen Evolution Reaction[J]. Acta Physico-Chimica Sinica, ;2017, 33(12): 2542-2549. doi: 10.3866/PKU.WHXB201706151 shu

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

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 Date: 3 May 2017
Revised Date: 12 June 2017

Fund Project: The project was supported by the National Natural Science Foundation of China (11405168, 11505011).

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 (MoS_x/RGO) was prepared by the γ-ray induced reduction of ammonium tetrathiomolybdate and graphite oxide. The composition, morphology, and structure of the MoS_x/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 MoS_x/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 MoS_x/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 MoS_x/RGO catalyst also showed an excellent long-time stability during the evaluation for HER.
- Molybdenum sulfide,
- Reduced graphene oxide,
- Radiation synthesis,
- Hydrogen evolution reaction,
- Volmer-Heyrovesy mechanism
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