▎ 摘　　要

In this work, 3D flower - like Ni(OH)(2)/Ni@NG composite electrodes were prepared by combining 3D Ni(OH)(2)/Ni with nitrogen-doped reduced graphene oxide (rGO) using de-alloying and two-step hydrothermal synthesis. Characterization of the phase, valence distribution, and microstructure of electrodes by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). In addition, the electrocatalytic hydrogen evolution reaction (HER) performance was tested in 1 mol.L-1 KOH solution. The results showed that the three-dimensional structure of Ni(OH)(2)/Ni increased the active area of the electrode, and the complexation with N-doped rGO significantly improved the electron/ion transport rate with an overpotential of 108 mV (eta(10)) and a Tafel slope of 114.9 mV.dec(-1), which exhibited good HER catalytic activity. The Ni(OH)(2)/Ni@NG electrode showed good stability by both the 1 000-turn cyclic voltammetry method and the chronopotentiometry test.