Electrochemical Behaviour of Magnesium(II) on Ni Electrode inLiCl-KCl Eutectic |
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Authors: | WANG Shanshan HAN Wei ZHANG Milin LI Mei YANG Xiaoguang SUN Yang |
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Affiliation: | Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China |
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Abstract: | The electrochemical behaviour of magnesium(II) and the formation mechanism of Mg-Ni alloys on Ni electrode were studied in LiCl-KCl eutectic using various electrochemical techniques. Cyclic voltammogram and square-wave voltammogram revealed that under-potential deposition of magnesium occurred on Ni electrode because Mg-Ni alloy compounds were formed. The thermodynamic properties of the Mg-Ni intermetallics, Mg2Ni and MgNi2, were determined using open circuit chronopotentiometry in the temperature range of 818―893 K. Moreover, the Mg-Ni alloys were produced by potentiostatic and galvanostatic electrolysis under different conditions and characterized by means of scanning electron microscopy(SEM) equipped with energy dispersive spectrometry(EDS) and X-ray diffraction(XRD). The experimental results indicate that Mg-Ni intermetallic compounds can be selectively produced by potentiostatic electrolysis. |
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Keywords: | Electrochemical behaviour Mg-Ni alloy Electrochemical formation Ni electrode Molten chloride |
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