Electrochemical Nucleation and Growth of Cobalt from Methanesulfonic Acid Electrolyte
Electrochemical Nucleation and Growth of Cobalt from Methanesulfonic Acid Electrolyte
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甲磺酸电解液中钴的电化学成核和生长
DOI：
10.1149/2.0191816jes
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发表时间：
2018-11-29
影响因子：
3.9
通讯作者：
Li, Deyu
中科院分区：
文献类型：
--
作者：
Kong, Delong;Zheng, Zhen;Li, Deyu
研究了在甲烷磺酸（MSA）电解液中钴在玻碳电极（GCE）上的电化学成核和生长过程，考察了pH和钴浓度对电结晶机理的影响。循环伏安法实验表明，pH值和钴浓度的依赖性的起始电位和存款相变与pH值降低也被注意到。从电流瞬态分析，钴离子的扩散系数估计为1.89 × 10（-5）cm（2）s（-1）。0.6 mol/L Co ~（2+）的电结晶机理为瞬时成核-动力学控制生长，与pH无关; 0.2 mol/L Co ~（2+）的电结晶机理为渐进成核-扩散控制生长，pH = 2.0时为瞬时成核-动力学控制生长1.5，并表现出一个渐进的成核与动力学控制的增长与较低的pH值为1.0的过程。(C)2018年电化学学会。
Electrochemical nucleation and growth of cobalt onto glassy carbon electrode (GCE) from methanesulfonic acid (MSA) electrolyte was investigated, the influence of pH and cobalt concentration on the electrocrystallization mechanism was also examined. Cyclic voltammetry experiments indicate a pH and cobalt concentration dependence of the onset potential and a deposit phase change with decreasing pH was also noted. From analysis of current transients, the diffusion coefficient of cobalt ion was estimated as 1.89 x 10(-5) cm(2)s(-1). The electrocrystallization mechanism for 0.6 mol/L Co2+ follows the instantaneous nucleation with kinetic controlled growth and is independent of the bath pH while the mechanism for 0.2 mol/L Co2+ follows the progressive nucleation with diffusion controlled growth at pH = 2.0 and then goes to instantaneous nucleation with kinetic controlled growth at pH = 1.5 and exhibits a process of progressive nucleation with kinetic controlled growth with lower pH of 1.0. (C) 2018 The Electrochemical Society.