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Number of Nuclei Formed during Electrocrystallization and Overall Time Dependence of Their Growth Currentстатья Исследовательская статья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 27 сентября 2019 г.
- Автор: Gamburg Yu D.
- Журнал: Russian Journal of Electrochemistry
- Том: 40
- Номер: 1
- Год издания: 2004
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 78
- Последняя страница: 85
- DOI: 10.1023/B:RUEL.0000012078.43792.74
- Аннотация: A model for continuous (progressing) nucleation is developed. The model takes into account (1) the mixed kinetics of growth of every nucleus, (2) different degree of the diffusion influence on the growth rate of nuclei formed at different time instants after switching the current on, and (3) the presence of hemispherical diffusion simultaneously with the developing front of plane diffusion. Equations that are obtained for the time dependence of the current include, in addition to values of concentrations, diffusion coefficients, and individual parameters of metals, the exchange current density and the overvoltage. The nucleation in depleted-by-diffusion zones around the growing nuclei is considered. It is shown that the average nucleation retardation degree in such zones is time-independent. Therefore, at an arbitrary time instant, the entire surface may be represented as comprising areas with an ordinary nucleation rate (whose share diminishes) and areas with a lower (but constant) nucleation rate (whose share rises). At not-too-low overvoltages, the decrease in the nucleation rate is mainly due to the decrease in the surface concentration of ions-reactants. The overall number of clusters, calculated with the proposed model, is usually a few orders of magnitude than found by known models.
- Добавил в систему: Гамбург Юлий Давидович