Ultrathin MoSe<sub>2</sub> Nanosheets Decorated on Carbon Fiber Cloth as Binder-Free and High-Performance Electrocatalyst for Hydrogen Evolution

MoSe<sub>2</sub> nanosheets with ultrathin thickness and rich defects were grown on the surface of carbon fiber cloth by a facile solvent-thermal method. The active area and conductivity of the MoSe<sub>2</sub> catalyst were increased simultaneously because of the NH<sub>4</sub>F etching effect and its incorporation with carbon fiber cloth. As a result, the MoSe<sub>2</sub>-based catalysts exhibited excellent HER activity including small onset potential, large exchange current density and small Tafel slope, which is superior to most of MoSe<sub>2</sub>-based catalysts reported previously.