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.

MoSe ₂与其他过渡金属_二卤化物结合形成杂化纳米结构是增强氢析出反应（HER）的电催化活性的有效途径。本研究通过种子诱导溶液法合成了具有花状形态的MoSe ₂ -Ni ₃ Se ₄杂化纳米电催化剂。Ni ₃ Se ₄组分趋于成核并在MoSe ₂的超薄纳米薄片表面上生长，从而形成杂化纳米结构，而不是独立地成核形成单独的纳米晶体。MoSe ₂ –Ni ₃ Se ₄制备了具有不同Mo：Ni比的杂化纳米电催化剂，并比较了它们的HER催化活性。结果表明，HER活性受Mo：Ni比的影响。与纯MoSe ₂相比，Mo：Ni摩尔比为2：1的MoSe ₂ -Ni ₃ Se ₄杂化纳米电催化剂显示出增强的HER特性，在10 mA / cm ²时的超电势为203 mV，Tafel斜率为57每十年mV。对于MoSe ₂ -Ni ₃ Se ₄杂化样品，还观察到电导率提高和周转频率（TOFs）升高。