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

Abstract

Combining MoSe 2 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, MoSe 2-Ni 3 Se 4 hybrid nanoelectrocatalysts with a flower-like morphology are synthesized by a seed-induced solution approach. Instead of independently nucleating to form separate nanocrystals, the Ni 3 Se 4 component tends to nucleate and grow on the surfaces of ultrathin nanoflakes of MoSe 2 to form a hybrid nanostructure. MoSe 2-Ni 3 Se 4 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 MoSe 2 , the MoSe 2-Ni 3 Se 4 hybrid nanoelectrocatalysts having a Mo:Ni molar ratio of 2:1 exhibit enhanced HER properties with an overpotential of 203 mV at 10 mA/cm 2 and a Tafel slope of 57 mV per decade. Improved conductivity and increased turnover frequencies (TOFs) are also observed for the MoSe 2-Ni 3 Se 4 hybrid samples.

Synergistic 2D MoSe2@WSe2 nanohybrid heterostructure toward superior hydrogen evolution and flexible supercapacitor

“…6(d) and (e). 19,20,27,[44][45][46][47][48][49][50][51] The long-term stability is a crucial factor to examine the practical application of the catalysts for HER activity. Fig.…”

Metal Electrocatalysts for Hydrogen Production in Water Splitting

“…A MoSe 2 hybrid with other transition metal dichalcogenides to form an optimal nanostructure is an effective way to increase HER electrocatalytic activity to replace a Pt electrocatalyst. 138 Wu et al 139 It should be noted that only the triangular prism phase edge locations have HER electrocatalytic properties and the base plate, which usually does not have defective/ unsaturated locations, is inactive. In addition to the alkaline medium, metal selenides have been successfully tested in acidic media.…”

Recent Progress and Prospective of Nickel Selenide-Based Electrocatalysts for Water Splitting

“…In addition to synergistic metal doping on Ni x Se y -based electrocatalysts, the construction of the heterostructure on nickel selenide could also optimize the surface/interface electronic structure and facilitate intrinsic catalytic activity and electrical conductivity. − Wang et al constructed NiSe 2 –Ni 2 P coupling heterostructures on NF, which confirmed that the heterojunction formation can significantly improve the water splitting activity of host material NiSe 2 , and DFT calculations were carried out to understand the influence of the heterogeneous interface on the significantly enhanced catalytic performance (Figure a-f) . Zhang et al prepared the three-dimensional substrate electrode CoSe 2 @NiSe 2 material for the first time, which maximizes the synergistic effect between CoSe 2 and NiSe 2 .…”