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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Electrocatalytic behaviour of NiBi coatings for hydrogen evolution reaction in alkaline medium
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Electrocatalytic behaviour of NiBi coatings for hydrogen evolution reaction in alkaline medium

机译：NiBi涂层在碱性介质中对氢释放反应的电催化行为

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摘要

The nickel-bismuth binary coatings with various chemical compositions were galvanostatically deposited on the copper electrode in view of their possible applications as electrocatalytic materials for the hydrogen evolution reaction (HER) in alkaline solution. The HER activity of coatings was tested with the help of potentiodynamic measurements and electrochemical impedance spectroscopy (EIS) technique. The electrochemical characterization was achieved by the means of cyclic voltammetry (CV). The surface morphology and surface composition of coatings were determined with scanning electron microscopy (SEM), and energy dispersive X-ray (EDX). The potentiodynamic measurements show that, the binary coatings decrease the hydrogen over potential and increase the current density values for HER. The EIS analysis confirms, the charge transfer resistances decrease and the double layer capacitance values increase for binary coatings. The EDX results in sign that the composition of binary coating changes by using coating bath.
机译：考虑到它们可能用作碱性溶液中氢逸出反应（HER）的电催化材料，将具有各种化学成分的镍-铋二元涂层恒电流沉积在铜电极上。借助电位动力学测量和电化学阻抗谱（EIS）技术测试了涂层的HER活性。电化学表征通过循环伏安法（CV）实现。用扫描电子显微镜（SEM）和能量色散X射线（EDX）测定涂层的表面形态和表面组成。电位动力学测量表明，二元涂层降低了氢的电势，并增加了HER的电流密度值。 EIS分析证实，二元涂层的电荷转移电阻降低，双层电容值增加。 EDX的迹象表明，通过使用镀液，二元涂层的成分会发生变化。

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