Sn nucleation and growth from Sn(II)dissolved in ethylene glycol:Electrochemical behavior and temperature effect  

含Sn(II)乙二醇溶液中Sn的形核和生长:电化学行为和温度效应

作　　者：Kiem Van DO Hieu Van NGUYEN Tu Manh LE 

机构地区：[1]Faculty of Electrical and Electronic Engineering,Phenikaa University,Yen Nghia,Ha-Dong,Hanoi 10000,Vietnam [2]Phenikaa Research and Technology Institute(PRATI),A&A Green Phoenix Group,167 Hoang Ngan,Hanoi 10000,Vietnam [3]Faculty of Materials Science and Engineering,Phenikaa Institute for Advanced Study(PIAS),Phenikaa University,Hanoi 10000,Vietnam

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第8期2714-2732,共19页中国有色金属学报（英文版）

基　　金：the Phenikaa Innovation Foundation,Vietnam(No.ĐMST.2022.01).

摘　　要：Thermodynamic and kinetic aspects of Sn nucleation and growth processes onto a glassy carbon electrode from SnCl2·2H2O dissolved in ethylene glycol solutions were studied.Typical reduction and oxidation peaks observed in voltammograms have demonstrated the capability of ethylene glycol solutions to electrodeposit Sn.The temperature-dependence of diffusion coefficient values derived from potentiodynamic and potentiostatic studies helped to determine and validate estimations of the activation energy for Sn(II)bulk diffusion.Chronoamperometric results have identified that,the suitable model to describe the early stage of Sn electrodeposition could be composed of Sn three-dimensional nucleation and diffusion-controlled growth and water reduction contributions,which was duly validated by theoretical and experimental approaches.From the model,typical kinetic parameters such as the nucleation frequency of Sn(A),number density of Sn nuclei(N_(0)),and diffusion coefficient of Sn(II)ions(D),were determined.The presence of Sn nuclei with excellent quality and their structures were verified using SEM,EDX,and XRD techniques.将SnCl_(2)·2H_(2)O溶解到乙二醇溶液中,研究Sn在玻璃碳电极上形核和生长过程的热力学和动力学。从伏安图中观察到的典型还原和氧化峰证明了乙二醇溶液电沉积Sn的能力。从动电位和恒电位研究中得出的扩散系数值具有温度依赖性,这有助于确定和验证估算的Sn(II)体扩散激活能。计时电流法的研究结果表明,描述Sn电沉积早期阶段的合适模型可能包括Sn的三维形核、受扩散控制的生长以及水还原的贡献,该模型通过理论和实验方法得到了适当的验证。并通过该模型确定了典型的动力学参数,包括形核率(A)、Sn核的数密度(N_(0))和扩散系数(D)。使用SEM、EDX和XRD技术验证了高质量Sn核的存在及其结构。

关 键 词：SN NUCLEATION growth ethylene glycol nucleation kinetics ELECTRODEPOSITION 

分 类 号：TQ153.13[化学工程—电化学工业]