Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes
The Ag electrodeposition on Pt spherical substrates was investigated over a wide range of experimental conditions to establish a correlation between the kinetics of the process and the different growth modes of the Ag overlayer. At E<sub>d</sub> ≊ E<sub>rev</sub>, the electro...
| Autores principales: | , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
1992
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/119483 |
| Aporte de: |
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I19-R120-10915-119483 |
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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 Electrodeposition Pt spherical substrates Migration |
| spellingShingle |
Ciencias Exactas Química Electrodeposition Pt spherical substrates Migration Hernández Creus, A. Carro, P. González, S. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes |
| topic_facet |
Ciencias Exactas Química Electrodeposition Pt spherical substrates Migration |
| description |
The Ag electrodeposition on Pt spherical substrates was investigated over a wide range of experimental conditions to establish a correlation between the kinetics of the process and the different growth modes of the Ag overlayer. At E<sub>d</sub> ≊ E<sub>rev</sub>, the electrodeposition of the first Ag layer obeys a combined adsorption-desorption and nucleation and 2-D growth process under diffusion control. At E<sub>d</sub> ≊ E<sub>rev</sub>, the formation of the 2-D Ag layer proceeds through an adsorption mechanism, whereas the formation of the 3-D Ag layer fits a progressive nucleation and 3-D growth mechanism under diffusion control. Finally, when E<sub>d</sub> < E<sub>rev</sub>, a potential threshold related to Ag dendritic growth, the kinetics of the reaction apparently obeys a progressive nucleation and 1-D growth. This process is triggered at edges and corners of large Ag crystals. Dendritic growth takes place outside the diffusion layer defined around the Pt substrate sphere. In this case migration plays a substantial role in the process. |
| format |
Articulo Articulo |
| author |
Hernández Creus, A. Carro, P. González, S. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
| author_facet |
Hernández Creus, A. Carro, P. González, S. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
| author_sort |
Hernández Creus, A. |
| title |
Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes |
| title_short |
Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes |
| title_full |
Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes |
| title_fullStr |
Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes |
| title_full_unstemmed |
Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes |
| title_sort |
electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes |
| publishDate |
1992 |
| url |
http://sedici.unlp.edu.ar/handle/10915/119483 |
| work_keys_str_mv |
AT hernandezcreusa electrochemicalkineticsandgrowthmodesofsilverdepositsonpolyfacetedplatinumsphericalelectrodes AT carrop electrochemicalkineticsandgrowthmodesofsilverdepositsonpolyfacetedplatinumsphericalelectrodes AT gonzalezs electrochemicalkineticsandgrowthmodesofsilverdepositsonpolyfacetedplatinumsphericalelectrodes AT salvarezzarobertocarlos electrochemicalkineticsandgrowthmodesofsilverdepositsonpolyfacetedplatinumsphericalelectrodes AT arviaalejandrojorge electrochemicalkineticsandgrowthmodesofsilverdepositsonpolyfacetedplatinumsphericalelectrodes |
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Repositorios |
| _version_ |
1764820448463290368 |