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首页> 外文期刊>Russian journal of electrochemistry >Study of Copper Electrodeposition from Acidic Sulfate and Perchlorate Electrolytes Using Faradaic Impedance Spectroscopy and Quartz Microbalance Methods
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Study of Copper Electrodeposition from Acidic Sulfate and Perchlorate Electrolytes Using Faradaic Impedance Spectroscopy and Quartz Microbalance Methods

机译：法拉第阻抗谱和石英微量天平法研究酸性硫酸盐和高氯酸盐电解液中的铜沉积

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摘要

Copper electrodeposition from acidic sulfate and perchlorate electrolytes is studied. Some measurements are performed with addition of gelatine as a surface active agent. In the course of microgravimetric studies, decrease of the derivative of the electrode mass variation by the consumed charge is found, as compared to the value corresponding to the current efficiency of 100%. The latter is in part related to the effect of the double layer structure on the rate of the consecutive stages of copper recharge (Cu2+ + e -> Cu+) and deposition (Cu+ + e -> Cu). This effect is most pronounced in the case of solutions containing surface active agents that cause hyperpolarization and extension of the monovalent copper stability range as a result of their adsorption on the electrode surface. The faradaic impedance spectra obtained in sulfate and perchlorate electrolytes evidence at least the difference in the rate constants of recharge and copper deposition in these electrolytes. In both cases, the recharge rate constant is considerably lower than the deposition rate constant. The difference between these constants decreases noticeably at the addition of surface active agents.
机译：研究了酸性硫酸盐和高氯酸盐电解液中的铜电沉积。一些测量是通过添加明胶作为表面活性剂来进行的。在微重力研究过程中，与对应于100％电流效率的值相比，发现了由消耗的电荷导致的电极质量变化的导数减小。后者部分与双层结构对铜再填充（Cu2 + + e-> Cu +）和沉积（Cu + + e-> Cu）的连续阶段的速率的影响有关。在含有表面活性剂的溶液中，这种作用最为明显，该表面活性剂由于其在电极表面上的吸附而导致超极化和单价铜稳定性范围的扩展。在硫酸盐和高氯酸盐电解质中获得的法拉第阻抗谱至少证明了这些电解质中的充电速率常数和铜沉积速率常数的差异。在这两种情况下，充电速率常数都大大低于沉积速率常数。添加表面活性剂后，这些常数之间的差异显着降低。

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