Heteronanowires of MoC–Mo2C as efficient electrocatalysts for hydrogen evolution reaction
作者： Huanlei Lin , Zhangping Shi , Sina He , Xiang Yu , Sinong Wang
DOI: 10.1039/C6SC00077K
关键词:
摘要: Exploring efficient noble-metal free electrocatalysts for the hydrogen evolution reaction (HER) is one of most promising pathways facing energy crisis. Herein, MoC–Mo2C heteronanowires composed well-defined nanoparticles were accomplished via controlled carbonization, showing excellent HER activity, fast kinetic metrics and outstanding stability in both acid basic electrolytes. In particular, optimal consisting 31.4 wt% MoC displayed a low overpotential (η10 = 126 120 mV reaching current density −10 mA cm−2), small Tafel slope (43 42 dec−1) onset (38 33 mV) 0.5 M H2SO4 1.0 KOH, respectively. Such prominent performance, outperforming electrocatalysts, was ascribed to carbide surface with an optimized electron density, consequently facilitated kinetics. This work elucidates feasible way toward heteronanostructure engineering, shedding some light on exploration optimization catalysts chemistry.
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