Abstract This paper presents insights on the thermodynamics and kinetics of the cobalt electronucleation and growth mechanisms onto glassy carbon electrode from a eutectic mixture of choline chloride and urea. The behavior of the current density transients can be described by a model capable of considering the cobalt three-dimensional nucleation and diffusion-controlled growth from metallic nuclei and the induction-time. Using the proposed model, typical kinetic parameters such as nucleation frequency A, number density of nuclei, N0, and diffusion coefficient, D, were determined at different temperatures and applied potentials. It was found that the residual water has some effects on the early stage of the Co electrodeposition, especially on the nucleation types. Thus, at low temperature it is predominant by progressive nucleation, while at high temperature it is governed by instantaneous nucleation mechanism. Furthermore, from the temperature-dependent relationship of the diffusion coefficient, the Gibbs free energy for cobalt nucleation in DES was able to be estimated.

中文翻译：

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温度对钴电子成核机制和动力学的影响，并使用再衬深共晶溶剂在玻碳电极上生长。

摘要 本文介绍了从氯化胆碱和尿素的共晶混合物到玻碳电极上钴电子成核和生长机制的热力学和动力学的见解。电流密度瞬变的行为可以通过一个模型来描述，该模型能够考虑金属核的钴三维成核和扩散控制生长以及诱导时间。使用所提出的模型，在不同的温度和施加的电位下确定了典型的动力学参数，例如成核频率 A、核数密度 N0 和扩散系数 D。发现残留水对 Co 电沉积的早期阶段有一些影响，特别是对成核类型。因此，在低温下，它主要是逐渐成核，而在高温下，它受瞬时成核机制的控制。此外，根据扩散系数的温度相关关系，可以估计 DES 中钴成核的吉布斯自由能。