The surface diffusion of gold atoms on gold electrodes in acid solution and its dependence on the presence of foreign adsorbates
- Autores
- Alonso, C.; Salvarezza, Roberto Carlos; Vara, J. M.; Arvia, Alejandro Jorge
- Año de publicación
- 1990
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The surface diffusion coefficient (Ds) of Au atoms in 0.5 M H2SO4 at 298 K has been determined from the time dependence of the surface roughness factor of electrodispersed Au electrodes in 0.5 M H2SO4. The value of Ds for 0.5 M H2SO4 is 5 × 10−14 cm2 s−1, a figure which depends considerably on the presence of adsorbable species in solution. Thus, the adsorption of pyridine produces a remarkable decrease of Ds, whereas the adsorption of Cl− ion results in the opposite effect. The corresponding values of Ds are 1.2 × 10−14 cm2 s−1 for 0.5 M H2SO4 + 0.1 M pyridine, and 2.5 × 10−13 cm2 s−1 for 0.5 M H2SO4 + 5 × 10−4 M KCl. These results are interpreted through the influence of the adsorbate on the Au surface atom diffusion mechanism.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA)
Facultad de Ciencias Exactas - Materia
-
Ciencias Exactas
Química
surface diffusion
Adsorción
adsorbate
electrodispersed electrodes
Electrodos
Oro - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/79960
Ver los metadatos del registro completo
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The surface diffusion of gold atoms on gold electrodes in acid solution and its dependence on the presence of foreign adsorbatesAlonso, C.Salvarezza, Roberto CarlosVara, J. M.Arvia, Alejandro JorgeCiencias ExactasQuímicasurface diffusionAdsorciónadsorbateelectrodispersed electrodesElectrodosOroThe surface diffusion coefficient (D<sub>s</sub>) of Au atoms in 0.5 M H<sub>2</sub>SO<sub>4</sub> at 298 K has been determined from the time dependence of the surface roughness factor of electrodispersed Au electrodes in 0.5 M H<sub>2</sub>SO<sub>4</sub>. The value of D<sub>s</sub> for 0.5 M H<sub>2</sub>SO<sub>4</sub> is 5 × 10<sup>−14</sup> cm<sup>2</sup> s<sup>−1</sup>, a figure which depends considerably on the presence of adsorbable species in solution. Thus, the adsorption of pyridine produces a remarkable decrease of D<sub>s</sub>, whereas the adsorption of Cl<sup>−</sup> ion results in the opposite effect. The corresponding values of D<sub>s</sub> are 1.2 × 10<sup>−14</sup> cm<sup>2</sup> s<sup>−1</sup> for 0.5 M H<sub>2</sub>SO<sub>4</sub> + 0.1 M pyridine, and 2.5 × 10<sup>−13</sup> cm<sup>2</sup> s<sup>−1</sup> for 0.5 M H<sub>2</sub>SO<sub>4</sub> + 5 × 10<sup>−4</sup> M KCl. These results are interpreted through the influence of the adsorbate on the Au surface atom diffusion mechanism.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA)Facultad de Ciencias Exactas1990info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1331-1336http://sedici.unlp.edu.ar/handle/10915/79960enginfo:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(90)85003-6info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:14:38Zoai:sedici.unlp.edu.ar:10915/79960Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:14:38.384SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
The surface diffusion of gold atoms on gold electrodes in acid solution and its dependence on the presence of foreign adsorbates |
| title |
The surface diffusion of gold atoms on gold electrodes in acid solution and its dependence on the presence of foreign adsorbates |
| spellingShingle |
The surface diffusion of gold atoms on gold electrodes in acid solution and its dependence on the presence of foreign adsorbates Alonso, C. Ciencias Exactas Química surface diffusion Adsorción adsorbate electrodispersed electrodes Electrodos Oro |
| title_short |
The surface diffusion of gold atoms on gold electrodes in acid solution and its dependence on the presence of foreign adsorbates |
| title_full |
The surface diffusion of gold atoms on gold electrodes in acid solution and its dependence on the presence of foreign adsorbates |
| title_fullStr |
The surface diffusion of gold atoms on gold electrodes in acid solution and its dependence on the presence of foreign adsorbates |
| title_full_unstemmed |
The surface diffusion of gold atoms on gold electrodes in acid solution and its dependence on the presence of foreign adsorbates |
| title_sort |
The surface diffusion of gold atoms on gold electrodes in acid solution and its dependence on the presence of foreign adsorbates |
| dc.creator.none.fl_str_mv |
Alonso, C. Salvarezza, Roberto Carlos Vara, J. M. Arvia, Alejandro Jorge |
| author |
Alonso, C. |
| author_facet |
Alonso, C. Salvarezza, Roberto Carlos Vara, J. M. Arvia, Alejandro Jorge |
| author_role |
author |
| author2 |
Salvarezza, Roberto Carlos Vara, J. M. Arvia, Alejandro Jorge |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
Ciencias Exactas Química surface diffusion Adsorción adsorbate electrodispersed electrodes Electrodos Oro |
| topic |
Ciencias Exactas Química surface diffusion Adsorción adsorbate electrodispersed electrodes Electrodos Oro |
| dc.description.none.fl_txt_mv |
The surface diffusion coefficient (D<sub>s</sub>) of Au atoms in 0.5 M H<sub>2</sub>SO<sub>4</sub> at 298 K has been determined from the time dependence of the surface roughness factor of electrodispersed Au electrodes in 0.5 M H<sub>2</sub>SO<sub>4</sub>. The value of D<sub>s</sub> for 0.5 M H<sub>2</sub>SO<sub>4</sub> is 5 × 10<sup>−14</sup> cm<sup>2</sup> s<sup>−1</sup>, a figure which depends considerably on the presence of adsorbable species in solution. Thus, the adsorption of pyridine produces a remarkable decrease of D<sub>s</sub>, whereas the adsorption of Cl<sup>−</sup> ion results in the opposite effect. The corresponding values of D<sub>s</sub> are 1.2 × 10<sup>−14</sup> cm<sup>2</sup> s<sup>−1</sup> for 0.5 M H<sub>2</sub>SO<sub>4</sub> + 0.1 M pyridine, and 2.5 × 10<sup>−13</sup> cm<sup>2</sup> s<sup>−1</sup> for 0.5 M H<sub>2</sub>SO<sub>4</sub> + 5 × 10<sup>−4</sup> M KCl. These results are interpreted through the influence of the adsorbate on the Au surface atom diffusion mechanism. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) Facultad de Ciencias Exactas |
| description |
The surface diffusion coefficient (D<sub>s</sub>) of Au atoms in 0.5 M H<sub>2</sub>SO<sub>4</sub> at 298 K has been determined from the time dependence of the surface roughness factor of electrodispersed Au electrodes in 0.5 M H<sub>2</sub>SO<sub>4</sub>. The value of D<sub>s</sub> for 0.5 M H<sub>2</sub>SO<sub>4</sub> is 5 × 10<sup>−14</sup> cm<sup>2</sup> s<sup>−1</sup>, a figure which depends considerably on the presence of adsorbable species in solution. Thus, the adsorption of pyridine produces a remarkable decrease of D<sub>s</sub>, whereas the adsorption of Cl<sup>−</sup> ion results in the opposite effect. The corresponding values of D<sub>s</sub> are 1.2 × 10<sup>−14</sup> cm<sup>2</sup> s<sup>−1</sup> for 0.5 M H<sub>2</sub>SO<sub>4</sub> + 0.1 M pyridine, and 2.5 × 10<sup>−13</sup> cm<sup>2</sup> s<sup>−1</sup> for 0.5 M H<sub>2</sub>SO<sub>4</sub> + 5 × 10<sup>−4</sup> M KCl. These results are interpreted through the influence of the adsorbate on the Au surface atom diffusion mechanism. |
| publishDate |
1990 |
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1990 |
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