Large surface and pore structure of mesoporous WS2 and RGO nanosheets with small amount of Pt as a highly efficient electrocatalyst for hydrogen evolution

In this work, mesoporous WS 2 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 WS 2, 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 H 2 SO 4 for the hydrogen evolution reaction (HER).