An Electrochemical Quartz Crystal Microbalance Study on Electrodeposition of Aluminum and Aluminum-Manganese Alloys
An Electrochemical Quartz Crystal Microbalance Study on Electrodeposition of Aluminum and Aluminum-Manganese Alloys
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DOI：
10.1149/2.0381708jes
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发表时间：
2017-01-01
影响因子：
3.9
通讯作者：
Bund, A.
中科院分区：
文献类型：
--
作者：
Ispas, A.;Wolff, E.;Bund, A.
采用电化学石英晶体微天平（EQCM）对铝及铝锰合金在AlCl3基离子液体中的电沉积过程进行了原位研究。循环伏安法、恒电位和恒电流沉积在从25摄氏度到100摄氏度的不同温度下进行。用SEM和AFM研究了镀层的形貌，用EDX研究了镀层的成分。根据Sauerbrey方程，从EQCM数据计算合金的化学计量。我们可以证明，对于在金电极上电沉积的薄膜，可以通过改变沉积电流或电势以及通过改变电解质的温度来调节它们的形态，并且在合金的情况下，还可以调节它们的组成。随着电解液中Mn含量的增加，沉积物的形貌逐渐从Al膜的多面体状结构转变为AlMn合金的圆形颗粒。根据EQCM数据，对Al和AlMn合金的电沉积和溶解机理进行了分析和讨论。(C)作者（S）2017由ECS发布。All rights reserved.
The electrodeposition process of aluminum and aluminum-manganese alloys was studied in situ, by using an electrochemical quartz crystal microbalance, EQCM, with damping monitoring, in AlCl3 based ionic liquids. Cyclic voltammetry, potentiostatic and galvanostatic deposition were performed at different temperatures, from 25 degrees C up to 100 degrees C. The morphology of the deposits was investigated by SEM and AFM, and their composition by EDX. The stoichiometry of the alloys was calculated from the EQCM data, based on Sauerbrey's equation. We could show that for thin films electrodeposited on gold electrodes, one can tune their morphology, and in the case of the alloys, also their composition, by modifying the deposition current or potential, as well as by modifying the temperature of the electrolyte. The morphology of the deposits changed gradually with increasing the amount of Mn in the electrolyte from a polyhedral like structure for Al films to round granules for the AlMn alloys. The mechanism for electrodeposition and dissolution of Al and AlMn alloys were analyzed and discussed based on the EQCM data. (C) The Author(s) 2017. Published by ECS. All rights reserved.