Nanoscale Research Letters | |
MoSe2-Ni3Se4 Hybrid Nanoelectrocatalysts and Their Enhanced Electrocatalytic Activity for Hydrogen Evolution Reaction | |
Yuanzhi Chen1  Pengyuan Wu1  Wanjie Xu1  Hongfei Zheng1  Laisen Wang1  Gangyong Sun1  Jin Xu1  Dong-Liang Peng1  | |
[1] Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University; | |
关键词: Hydrogen evolution reaction; MoSe2; Electrocatalysis; Nickel selenides; Hybrid nanostructure; | |
DOI : 10.1186/s11671-020-03368-z | |
来源: DOAJ |
【 摘 要 】
Abstract Combining MoSe2 with other transition metal dichalcogenides to form a hybrid nanostructure is an effective route to enhance the electrocatalytic activities for hydrogen evolution reaction (HER). In this study, MoSe2-Ni3Se4 hybrid nanoelectrocatalysts with a flower-like morphology are synthesized by a seed-induced solution approach. Instead of independently nucleating to form separate nanocrystals, the Ni3Se4 component tends to nucleate and grow on the surfaces of ultrathin nanoflakes of MoSe2 to form a hybrid nanostructure. MoSe2–Ni3Se4 hybrid nanoelectrocatalysts with different Mo:Ni ratios are prepared and their HER catalytic activities are compared. The results show that the HER activities are affected by the Mo:Ni ratios. In comparison with pure MoSe2, the MoSe2-Ni3Se4 hybrid nanoelectrocatalysts having a Mo:Ni molar ratio of 2:1 exhibit enhanced HER properties with an overpotential of 203 mV at 10 mA/cm2 and a Tafel slope of 57 mV per decade. Improved conductivity and increased turnover frequencies (TOFs) are also observed for the MoSe2-Ni3Se4 hybrid samples.
【 授权许可】
Unknown