Periodic current oscillations at the gold/acid aqueous interfaces induced by HCl additions
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...
Guardado en:
| Autores principales: | , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
1979
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/122403 https://www.sciencedirect.com/science/article/abs/pii/0013468679870449 |
| Aporte de: |
| id |
I19-R120-10915-122403 |
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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 Periodic current oscillations HCl additions |
| spellingShingle |
Ciencias Exactas Química Periodic current oscillations HCl additions Podestá, José J. Piatti, Roberto C. V. Arvia, Alejandro Jorge Periodic current oscillations at the gold/acid aqueous interfaces induced by HCl additions |
| topic_facet |
Ciencias Exactas Química Periodic current oscillations HCl additions |
| 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. |
| format |
Articulo Articulo |
| author |
Podestá, José J. Piatti, Roberto C. V. Arvia, Alejandro Jorge |
| author_facet |
Podestá, José J. Piatti, Roberto C. V. Arvia, Alejandro Jorge |
| author_sort |
Podestá, José J. |
| title |
Periodic current oscillations at the gold/acid aqueous interfaces induced by 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 |
| publishDate |
1979 |
| url |
http://sedici.unlp.edu.ar/handle/10915/122403 https://www.sciencedirect.com/science/article/abs/pii/0013468679870449 |
| work_keys_str_mv |
AT podestajosej periodiccurrentoscillationsatthegoldacidaqueousinterfacesinducedbyhcladditions AT piattirobertocv periodiccurrentoscillationsatthegoldacidaqueousinterfacesinducedbyhcladditions AT arviaalejandrojorge periodiccurrentoscillationsatthegoldacidaqueousinterfacesinducedbyhcladditions |
| bdutipo_str |
Repositorios |
| _version_ |
1764820448725434368 |