不同维度的NiCoP对析氢反应的影响

Effects of NiCoP with Different Dimension on Hydrogen Evolution Reaction

李东 王昆彦 王育乔

Dong Li Kunyan Wang Yuqiao Wang

东南大学 化学化工学院，江苏 南京 211189 金陵科技学院 材料工程学院，江苏 南京 211169

School of Chemistry and Chemical Engineering，Southeast University，Nanjing Jiangsu 211189，China School of Materials Engineering，Jinling Institute of Technology，Nanjing Jiangsu 211169，China

形貌调控是提升电催化析氢反应性能的重要途径。通过理论计算和实验验证相结合的方法，研究了不同维度的NiCoP对析氢反应的影响；构建了一维纳米线（NW?NiCoP）和二维纳米片（NS?NiCoP）的结构模型。结果表明，NW?NiCoP在费米能级附近具有更高的态密度，有利于电荷高效传输，而NS?NiCoP则具有更高的氢吸附能，有利于进行Volmer反应。采用水热和磷化两步法分别制备了NW?NiCoP、NS?NiCoP和三维杂化纳米片线（NSW?NiCoP）；对不同维度的NiCoP进行了电化学测试。结果表明，在电流密度为-10 mA/cm2时，NSW?NiCoP的过电位为45 mV。

Morphology regulation is an important way to improve the performance of electrocatalytic hydrogen evolution reaction. This paper investigated the effect of NiCoP with different dimension on the hydrogen evolution reaction by combining theoretical calculation and experimental analysis methods and constructed structural models of 1D nanowires (NW?NiCoP) and 2D nanosheets (NS?NiCoP).Simulation results show that NW?NiCoP exhibits higher electronic density of electronic states near the Fermi level, which is beneficial to efficient charge transfer. NS?NiCoP features higher hydrogen adsorption energy, which is favorable for the Volmer reaction.NW?NiCoP,NS?NiCoP,and 3D nanosheet?wires (NSW?NiCoP) were prepared by hydrothermal and phosphating processes. Electrochemical tests on NiCoP with different dimension indicate that the overpotential is 45 mV for NSW?NiCoP at -10 mA/cm2.

国家自然科学基金项目(61774033)

10.12422/j.issn.1006-396X.2023.02.009