Ultrathin Graphitic Carbon Coated Molybdenum Phosphide as Noble-Metal-Free Electrocatalyst for Hydrogen Evolution

摘要

The exploration of non-precious metal catalysts for hydrogen generation by electrochemical water-splitting is the subject of extensive studies. In this work, we report the ultrathin graphitic carbon coated MoP nanoparticles (MoP/GC) prepared by the combination method of temperature-programmed reduction and hydrothermal treatment. The sintering condition is of vital importance for the MoP synthesis. Our catalyst exhibits high activity and outstanding stability for the hydrogen evolution reaction (HER). In acidic media, MoP/GC exhibits a low onset overpotential of 47 mV, and a Tafel slope of 54.0 mVdec