Effect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytes
The 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<...
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| Autores principales: | , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
1993
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/119383 |
| Aporte de: |
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I19-R120-10915-119383 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Química Gold electrodes Roughness relaxation |
| spellingShingle |
Ciencias Exactas Química Gold electrodes Roughness relaxation García, M. P. Gómez, M. M. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge Effect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytes |
| topic_facet |
Ciencias Exactas Química Gold electrodes Roughness relaxation |
| description |
The 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. |
| format |
Articulo Articulo |
| author |
García, M. P. Gómez, M. M. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
| author_facet |
García, M. P. Gómez, M. M. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
| author_sort |
García, M. P. |
| title |
Effect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytes |
| title_short |
Effect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytes |
| title_full |
Effect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytes |
| title_fullStr |
Effect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytes |
| title_full_unstemmed |
Effect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytes |
| title_sort |
effect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytes |
| publishDate |
1993 |
| url |
http://sedici.unlp.edu.ar/handle/10915/119383 |
| work_keys_str_mv |
AT garciamp effectofthesolutioncompositionandtheappliedpotentialonthekineticsofroughnessrelaxationatgoldelectrodesinslightlyacidelectrolytes AT gomezmm effectofthesolutioncompositionandtheappliedpotentialonthekineticsofroughnessrelaxationatgoldelectrodesinslightlyacidelectrolytes AT salvarezzarobertocarlos effectofthesolutioncompositionandtheappliedpotentialonthekineticsofroughnessrelaxationatgoldelectrodesinslightlyacidelectrolytes AT arviaalejandrojorge effectofthesolutioncompositionandtheappliedpotentialonthekineticsofroughnessrelaxationatgoldelectrodesinslightlyacidelectrolytes |
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Repositorios |
| _version_ |
1764820448358432770 |