Preparation and high-efficient hydrogen evolution reaction of hydrangea-like MoS2 hollow microspheres modified by needle-like g-C3N4
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To exploit non-precious metallic and earth-abundant elements for effective electrocatalytic hydrogenation catalysts, a unique structure electrocatalytic hydrogenation catalyst is fabricated using hydrangea-like molybdenum disulfide (MoS2) hollow microsphere with an average external diameter of 2.5 μm and the needle-like graphitic carbon nitride (g-C3N4) with an average length of 1 μm. The special morphology of the g-C3N4/MoS2 composite heterostructure with advantages of more exposed edge, better conductivity and defect-structures remarkably improves electrochemical active sites, which leads to an outstanding electrocatalytic performance for hydrogen evolution reaction (HER) with a small Tafel slop of 55.7 mV decade−1 and low overpotential (98.8 mV at 10 mA cm−2) more than most MoS2-based catalysts reported. The unique g-C3N4/MoS2 composite heterostructure can be applied in the field of energy conversion and storage.
We gratefully acknowledge financial support from Zhejiang Top Priority Discipline of Textile Science and Engineering, Natural Science Foundation of Zhejiang Province (No. LY13B030009).