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采用恒电流共沉积方法制备了具有纳米结构的NiCu双金属电极。采用线性扫描、塔菲尔曲线、电流时间曲线及电化学阻抗谱对NiCu双金属电极电催化析氢的性能进行了测试;并且还利用X射线衍射(XRD)、扫描电子显微镜(SEM)和循环伏安测试手段对其组成、相结构和表面形貌进行了表征和分析。实验结果表明,NiCu双金属电极的电催化析氢性能明显优于Ni电极或Cu电极,这可能与Cu和Ni的协同作用有关。在所研究的NiCu双金属电极中,NiCu0.04具有较好的电化学析氢活性,这主要与其电化学反应电阻较小和比表面积较大有关。
The nanocrystalline NiCu bimetallic electrode was prepared by constant current co-deposition method. The performance of NiCu bimetallic electrode for hydrogen evolution was tested by linear sweep, Tafel curve, current time curve and electrochemical impedance spectroscopy. X-ray diffraction (XRD), scanning electron microscopy (SEM) and cyclic voltammetry An test method of its composition, phase structure and surface morphology were characterized and analyzed. The experimental results show that the electrocatalytic hydrogen evolution performance of NiCu bimetallic electrode is better than Ni electrode or Cu electrode, which may be related to the synergistic effect of Cu and Ni. Among the studied NiCu bimetallic electrodes, NiCu0.04 has good electrochemical hydrogen evolution activity, which is mainly related to the smaller electrochemical reaction resistance and larger specific surface area.