Periodic current oscillations at the gold/acid aqueous interfaces induced by HCl additions
- Autores
- Podestá, José J.; Piatti, Roberto C. V.; Arvia, Alejandro Jorge
- Año de publicación
- 1979
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The periodic oscillating current recorded under a constant potential step for Au/acid solution interfaces containing different concentrations of Cl− ion is studied in the 25–50°C range. Two main electrochemical reactions coupled to two diffusion processes are responsible for the periodic effect. The electrochemical reactions occurring successively are the electrodissolution of gold as the AuCl−2 complex, a reaction which is diffusion controlled and then the oxide layer formation when the solution is depleted of Cl− ion. Subsequently, as the anodic current decreases due to the electrode passivation, the HCl diffuses backwards and dissolves the oxide film. The active part of the periodic cycle is interpreted in terms of a diffusional process involving at its initiation the simultaneous uncoverage of the electrode surface.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas - Materia
-
Ciencias Exactas
Química
Periodic current oscillations
HCl additions - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/122403
Ver los metadatos del registro completo
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Periodic current oscillations at the gold/acid aqueous interfaces induced by HCl additionsPodestá, José J.Piatti, Roberto C. V.Arvia, Alejandro JorgeCiencias ExactasQuímicaPeriodic current oscillationsHCl additionsThe periodic oscillating current recorded under a constant potential step for Au/acid solution interfaces containing different concentrations of Cl− ion is studied in the 25–50°C range. Two main electrochemical reactions coupled to two diffusion processes are responsible for the periodic effect. The electrochemical reactions occurring successively are the electrodissolution of gold as the AuCl−2 complex, a reaction which is diffusion controlled and then the oxide layer formation when the solution is depleted of Cl− ion. Subsequently, as the anodic current decreases due to the electrode passivation, the HCl diffuses backwards and dissolves the oxide film. The active part of the periodic cycle is interpreted in terms of a diffusional process involving at its initiation the simultaneous uncoverage of the electrode surface.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1979-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf633-638http://sedici.unlp.edu.ar/handle/10915/122403enginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/0013468679870449info:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(79)87044-9info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:29:08Zoai:sedici.unlp.edu.ar:10915/122403Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:29:09.261SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Periodic current oscillations at the gold/acid aqueous interfaces induced by HCl additions |
| title |
Periodic current oscillations at the gold/acid aqueous interfaces induced by HCl additions |
| spellingShingle |
Periodic current oscillations at the gold/acid aqueous interfaces induced by HCl additions Podestá, José J. Ciencias Exactas Química Periodic current oscillations HCl additions |
| title_short |
Periodic current oscillations at the gold/acid aqueous interfaces induced by HCl additions |
| title_full |
Periodic current oscillations at the gold/acid aqueous interfaces induced by HCl additions |
| title_fullStr |
Periodic current oscillations at the gold/acid aqueous interfaces induced by HCl additions |
| title_full_unstemmed |
Periodic current oscillations at the gold/acid aqueous interfaces induced by HCl additions |
| title_sort |
Periodic current oscillations at the gold/acid aqueous interfaces induced by HCl additions |
| dc.creator.none.fl_str_mv |
Podestá, José J. Piatti, Roberto C. V. Arvia, Alejandro Jorge |
| author |
Podestá, José J. |
| author_facet |
Podestá, José J. Piatti, Roberto C. V. Arvia, Alejandro Jorge |
| author_role |
author |
| author2 |
Piatti, Roberto C. V. Arvia, Alejandro Jorge |
| author2_role |
author author |
| dc.subject.none.fl_str_mv |
Ciencias Exactas Química Periodic current oscillations HCl additions |
| topic |
Ciencias Exactas Química Periodic current oscillations HCl additions |
| dc.description.none.fl_txt_mv |
The periodic oscillating current recorded under a constant potential step for Au/acid solution interfaces containing different concentrations of Cl− ion is studied in the 25–50°C range. Two main electrochemical reactions coupled to two diffusion processes are responsible for the periodic effect. The electrochemical reactions occurring successively are the electrodissolution of gold as the AuCl−2 complex, a reaction which is diffusion controlled and then the oxide layer formation when the solution is depleted of Cl− ion. Subsequently, as the anodic current decreases due to the electrode passivation, the HCl diffuses backwards and dissolves the oxide film. The active part of the periodic cycle is interpreted in terms of a diffusional process involving at its initiation the simultaneous uncoverage of the electrode surface. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas |
| description |
The periodic oscillating current recorded under a constant potential step for Au/acid solution interfaces containing different concentrations of Cl− ion is studied in the 25–50°C range. Two main electrochemical reactions coupled to two diffusion processes are responsible for the periodic effect. The electrochemical reactions occurring successively are the electrodissolution of gold as the AuCl−2 complex, a reaction which is diffusion controlled and then the oxide layer formation when the solution is depleted of Cl− ion. Subsequently, as the anodic current decreases due to the electrode passivation, the HCl diffuses backwards and dissolves the oxide film. The active part of the periodic cycle is interpreted in terms of a diffusional process involving at its initiation the simultaneous uncoverage of the electrode surface. |
| publishDate |
1979 |
| dc.date.none.fl_str_mv |
1979-06 |
| 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/10915/122403 |
| url |
http://sedici.unlp.edu.ar/handle/10915/122403 |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/0013468679870449 info:eu-repo/semantics/altIdentifier/issn/0013-4686 info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(79)87044-9 |
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info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
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openAccess |
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http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
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application/pdf 633-638 |
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