✦ LIBER ✦

The kinetics of the anodic formation and reduction of phase silver sulfide films on silver in aqueous sulfide solutions

✍ Scribed by Viola I. Birss; Graham A. Wright

Publisher: Elsevier Science
Year: 1981
Tongue: English
Weight: 696 KB
Volume: 26
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(81)85168-7

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✦ Synopsis

The kinetics of the potentiodynamic formation and reduction of silver sulfide films on a silver rotating disc electrode in aqueous sulfide solutions were investigated . Due to the inherently fast reaction between silver and the HS -species, the physical processes of migration and diffusion of ions in solution were frequently rate limiting, Only when the rate of HS -transport in solution was very high, did the rate of film growth become limited by the solid-state electromigration of silver ions through the silver sulfide film. By utilizing the low field approximation for field-assisted electromigration, the ionic conductivity of these films was found to be 5.9 x 10 -4 S ran -1 . Silver sulfide film reduction occurred by the injection of electrons into the film to the film/electrolyte interface . All of the results have been supported by scanning electron microscope investigations .

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