Large surface and pore structure of mesoporous WS2 and RGO nanosheets with small amount of Pt as a highly efficient electrocatalyst for hydrogen evolution |
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| Authors: | Zhuo Guo Tianshuai Sun Yahui Li Hailan Kang Yuhan Che Yan Zhang Jinlin Lu |
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| Affiliation: | 1. Department of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, PR China;2. Harbin Institute of Technology, Shenzhen Graduate School, Shenzhen, 518055, PR China;3. School of Materials and Metallurgy, University of Science and Technology Liaoning, Liaoning, Anshan, 114051, PR China |
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| Abstract: | In this work, mesoporous WS2 with high surface area was prepared by hard template method. First, a one-step nanocasting generates metal precursor@mesoporous silica SBA-15 composites. A hydrothermal method is subsequently adopted to convert the precursors to sulfides in the confined nanochannels. After etching silica SBA-15, mesoporous layered metal sulfide crystals were obtained as the products. Then, we have put forward a new catalyst based on mesoporous WS2, RGO nanosheets and Pt nanoparticles as a highly efficient electrocatalyst for hydrogen evolution. The Pt/WG-2 nanostructure electrocatalyst in this report exhibits excellent performance with a small Tafel slope of 47 mV dec?1, long-term durability and an overpotential of 95 mV in 0.5 M H2SO4 for the hydrogen evolution reaction (HER). |
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| Keywords: | Electrocatalyst Hydrogen evolution reaction |
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