The effects of reaction kinetics upon the instabilities in cathodic electrodeposition

Research output: Contribution to journalReview articlepeer-review

Abstract

This article deals with a linear stability analysis of electrodeposition. The surface energy is disregarded in order to focus on the possible effects of the finite width of the electric double layer and the finite electrode reaction rate upon the wavelength selection. It is found that in the absence of electroconvection the fastest growing perturbation mode is that with a wavelength equal to the geometric average of the Debye length and the reaction diffusion length, which is the ratio of diffusivity to the electrode reaction rate. This wavelength is one–two orders of magnitude greater than that selected by the capillarity mechanism based on the surface energy estimates. This shift of the selected wavelength towards long waves is enhanced by another order of magnitude by electroconvection in the regime of the nonequilibrium electroosmosis developing upon the emergence of the extended space charge.

Original languageEnglish
Article number101591
JournalCurrent Opinion in Colloid and Interface Science
Volume60
DOIs
StatePublished - 1 Aug 2022

Keywords

  • Concentration polarization
  • Electrical double layer
  • Electroconvective instability
  • Electrodeposition
  • Extended space sharge
  • Morphological instability

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry

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