Amorphous Ni–S–Mn alloy as hydrogen evolution reaction cathode in alkaline medium
Amorphous Ni–S–Mn alloy as hydrogen evolution reaction cathode in alkaline medium
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DOI：
10.1016/j.ijhydene.2007.08.026
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发表时间：
2008
影响因子：
7.2
通讯作者：
Zhongqiang Shan;Yanjie Liu;Zheng Chen;Garry W. Warrender;Jianhua Tian
中科院分区：
文献类型：
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作者：
Zhongqiang Shan;Yanjie Liu;Zheng Chen;Garry W. Warrender;Jianhua Tian
采用电沉积法制备了非晶态Ni-S-Mn合金电极。采用X射线衍射仪、X射线光电子能谱、扫描电子显微镜和能谱分析等手段对Ni基新型Ni-S-Mn合金的显微组织、表面形貌和成分进行了分析。通过稳态极化测量，研究了形成电极析氢反应的电化学动力学和机理。由于具有较大的交换电流密度、较低的标准反应活化能和较大的表面粗糙度，非晶态Ni-S-Mn合金电极在不同温度下在30wt%KOH溶液中表现出比Ni-S合金电极更高的电化学活性和更高的稳定性。
Amorphous Ni–S–Mn alloy electrodes were obtained by electrodeposition. The microstructure, surface morphology and composition of the new Ni–S–Mn alloy on the Ni substrate were analyzed by X-ray diffraction (XRD), X-ray photoelectron spectrometry (XPS), scanning electron microscopy (SEM) and energy dispersive analysis of X-ray (EDAX). The electrochemical kinetics and mechanism of the hydrogen evolution reaction (HER) of formed electrodes were studied by measurement of the steady-state polarization. Owing to the larger exchange current densities, the lower standard reaction activity energy and a larger surface roughness, the amorphous Ni–S–Mn alloy electrode performs at a higher electrochemical activity with greater stability for the HER in 30wt% KOH solution at various temperatures than the Ni–S alloy electrode.