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

Autores
García, M. P.; Gómez, M. M.; Salvarezza, Roberto Carlos; Arvia, Alejandro Jorge
Año de publicación
1993
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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 K2SO4 has been studied. These measurements were taken in the −0.6 to 0.8 V (vs Hg/Hg2SO4 reference electrode) potential range. The kinetic data were obtained from the roughness factor decay over 5 × 104 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 < K2SO4 < KCl. This sequence correlates with the specific adsorption of anions on Au. In K2SO4 and NaF solutions, as the electroformation of AuOH species takes place, the effect of SO42− and F ions is no longer observed. In contrast, in 0.05 M KCl solution, the value of Ds increases steadily as the applied potential is increased positively.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Ciencias Exactas
Química
Gold electrodes
Roughness relaxation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/3.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/119383

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oai_identifier_str oai:sedici.unlp.edu.ar:10915/119383
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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Effect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytesGarcía, M. P.Gómez, M. M.Salvarezza, Roberto CarlosArvia, Alejandro JorgeCiencias ExactasQuímicaGold electrodesRoughness relaxationThe 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.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1993info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf237-246http://sedici.unlp.edu.ar/handle/10915/119383enginfo:eu-repo/semantics/altIdentifier/issn/1572-6657info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(93)80091-Uinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/3.0/Creative Commons Attribution 3.0 Unported (CC BY 3.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:28:10Zoai:sedici.unlp.edu.ar:10915/119383Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:28:10.651SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Effect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytes
title Effect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytes
spellingShingle Effect of the solution composition and the applied potential on the kinetics of roughness relaxation at gold electrodes in slightly acid electrolytes
García, M. P.
Ciencias Exactas
Química
Gold electrodes
Roughness relaxation
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
dc.creator.none.fl_str_mv García, M. P.
Gómez, M. M.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author García, M. P.
author_facet García, M. P.
Gómez, M. M.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_role author
author2 Gómez, M. M.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Gold electrodes
Roughness relaxation
topic Ciencias Exactas
Química
Gold electrodes
Roughness relaxation
dc.description.none.fl_txt_mv 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.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
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.
publishDate 1993
dc.date.none.fl_str_mv 1993
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/119383
url http://sedici.unlp.edu.ar/handle/10915/119383
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1572-6657
info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(93)80091-U
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/3.0/
Creative Commons Attribution 3.0 Unported (CC BY 3.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/3.0/
Creative Commons Attribution 3.0 Unported (CC BY 3.0)
dc.format.none.fl_str_mv application/pdf
237-246
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collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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