Ultrathin molybdenum disulfide nanosheet-coated acetylene black: One-pot synthesis and electrocatalytic hydrogen evolution |
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| Affiliation: | 1. College of Chemistry, Beijing Normal University, No. 19, Xinjiekouwai Street, Beijing 100875, PR China;2. State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Scientific Observing and Experiment Station of Animal Genetic Resources and Nutrition in North China, Ministry of Agriculture and Rural Affairs, Beijing 100193, PR China;1. Graduate Institute of Energy Engineering, National Central University, Taiwan;2. Dep. of Mechanical Engineering, National Central University, Taiwan;1. College of Science and Technology, Xinyang College, Xinyang 464000, China;2. College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China;3. School of Chemistry and Chemical Engineering, Zhou Kou Normal University, Zhou Kou 466001, China |
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| Abstract: | Molybdenum disulfide (MoS2) and its composites are the promising electrocatalysts for the hydrogen evolution reaction (HER) in acidic solution because it is earth-abundant and low-cost. Here we reported the ultrathin molybdenum disulfide nanosheet-coated acetylene black (AB) coated (MoS2@AB) as the electrocatalysts for the HER. The catalysts were synthesized in a facile one-pot solvothermal route. The as-prepared catalysts were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution TEM, X-Ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The results show that the MoS2 nanosheets on AB have a few layers and many surface defects, which are benefical to the HER catalysis. Electrochemical tests revealed that the existence of AB can't only make the catalyst expose a considerable amount of active sites but also increase the turnover frequency (TOF) value per site. In addition, the MoS2@AB(75) had excellent electro-catalytic HER performances with a low onset potential (−110 mV), a small Tafel slope (50–60 mV per decade) and the longtime stability (10 h). |
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| Keywords: | Molybdenum disulfide Acetylene black Hydrogen evolution reaction Catalyst Electrochemistry |
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