MoSe2-Ni3Se4 Hybrid Nanoelectrocatalysts and Their Enhanced Electrocatalytic Activity for Hydrogen Evolution Reaction

Nanoscale Research Letters

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