Effect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytes

dc.creatorGarcía, M. P.
dc.creatorGómez, M. M.
dc.creatorSalvarezza, Roberto Carlos
dc.creatorArvia, Alejandro Jorge
dc.date1993
dc.date2021-05-28T13:43:32Z
dc.date.accessioned2023-07-15T01:51:14Z
dc.date.available2023-07-15T01:51:14Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/119383
dc.identifierissn:1572-6657
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7459844
dc.descriptionThe roughness relaxation of thin columnar Au electrodeposits at constant potential and 25°C in 0.05 M NaF, 0.05 M KCl and 0.05 M K<sub>2</sub>SO<sub>4</sub> has been studied. These measurements were taken in the −0.6 to 0.8 V (vs Hg/Hg<sub>2</sub>SO<sub>4</sub> reference electrode) potential range. The kinetic data were obtained from the roughness factor decay over 5 × 10<sup>4</sup> s. The value of the surface diffusion coefficient Ds of Au atoms was derived from the roughness decay law at constant potential and pH. At any potential, the value of Ds increases in the order NaF < K<sub>2</sub>SO<sub>4</sub> < KCl. This sequence correlates with the specific adsorption of anions on Au. In K<sub>2</sub>SO<sub>4</sub> and NaF solutions, as the electroformation of AuOH species takes place, the effect of SO<sub>4</sub><sup>2−</sup> and F<sup>−</sup> ions is no longer observed. In contrast, in 0.05 M KCl solution, the value of D<sub>s</sub> increases steadily as the applied potential is increased positively.
dc.descriptionInstituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
dc.formatapplication/pdf
dc.format237-246
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by/3.0/
dc.rightsCreative Commons Attribution 3.0 Unported (CC BY 3.0)
dc.subjectCiencias Exactas
dc.subjectQuímica
dc.subjectGold electrodes
dc.subjectRoughness relaxation
dc.titleEffect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytes
dc.typeArticulo
dc.typeArticulo


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