Influence of the Adsorbate Structure and Surface Barrier at Micropores : The Adsorption on Columnar-Structured Gold Electrodes of Pyridine from Aqueous Perchlorate Ion-Containing S...
- Autores
- Gómez, M. M.; García, M. P.; San Fabián, J.; Vázquez, L.; Salvarezza, Roberto Carlos; Arvia, Alejandro Jorge
- Año de publicación
- 1997
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The electroadsorption on columnar Au electrodes (substrate) of pyridine from x M pyridine + 0.1 M HClO4 and x M pyridine + 0.1 M KClO4 aqueous solutions (10-3 e x e 10-2), at constant potential and 298 K, was studied using voltammetry, chronocoulometry, and ac impedance combined with scanning tunneling microscopy to characterize the substrate topography. For a constant pyridine concentration (c), the degree of surface coverage by pyridine adsorbate (θ) diminished as R was increased. The θ vs c plots, irrespective of R, were interpreted by a Frumkin adsorption isotherm including a constant standard adsorption free energy. The evaluation of adsorption isotherms reflects the existence of an excluded volume effect, which can be related to a barrier effect due to adsorbates at nanometer size pore entrances.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas - Materia
-
Ciencias Exactas
Química
Gold Electrodes
Pyridine
Molecular adsorption - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/121285
Ver los metadatos del registro completo
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Influence of the Adsorbate Structure and Surface Barrier at Micropores : The Adsorption on Columnar-Structured Gold Electrodes of Pyridine from Aqueous Perchlorate Ion-Containing SolutionsGómez, M. M.García, M. P.San Fabián, J.Vázquez, L.Salvarezza, Roberto CarlosArvia, Alejandro JorgeCiencias ExactasQuímicaGold ElectrodesPyridineMolecular adsorptionThe electroadsorption on columnar Au electrodes (substrate) of pyridine from x M pyridine + 0.1 M HClO<sub>4</sub> and x M pyridine + 0.1 M KClO<sub>4</sub> aqueous solutions (10<sup>-3</sup> e x e 10<sup>-2</sup>), at constant potential and 298 K, was studied using voltammetry, chronocoulometry, and ac impedance combined with scanning tunneling microscopy to characterize the substrate topography. For a constant pyridine concentration (c), the degree of surface coverage by pyridine adsorbate (θ) diminished as R was increased. The θ vs c plots, irrespective of R, were interpreted by a Frumkin adsorption isotherm including a constant standard adsorption free energy. The evaluation of adsorption isotherms reflects the existence of an excluded volume effect, which can be related to a barrier effect due to adsorbates at nanometer size pore entrances.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1997info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1317-1326http://sedici.unlp.edu.ar/handle/10915/121285enginfo:eu-repo/semantics/altIdentifier/issn/0743-7463info:eu-repo/semantics/altIdentifier/issn/1520-5827info:eu-repo/semantics/altIdentifier/doi/10.1021/la950937rinfo: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:UNLP2025-09-29T11:28:45Zoai:sedici.unlp.edu.ar:10915/121285Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:28:45.567SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Influence of the Adsorbate Structure and Surface Barrier at Micropores : The Adsorption on Columnar-Structured Gold Electrodes of Pyridine from Aqueous Perchlorate Ion-Containing Solutions |
title |
Influence of the Adsorbate Structure and Surface Barrier at Micropores : The Adsorption on Columnar-Structured Gold Electrodes of Pyridine from Aqueous Perchlorate Ion-Containing Solutions |
spellingShingle |
Influence of the Adsorbate Structure and Surface Barrier at Micropores : The Adsorption on Columnar-Structured Gold Electrodes of Pyridine from Aqueous Perchlorate Ion-Containing Solutions Gómez, M. M. Ciencias Exactas Química Gold Electrodes Pyridine Molecular adsorption |
title_short |
Influence of the Adsorbate Structure and Surface Barrier at Micropores : The Adsorption on Columnar-Structured Gold Electrodes of Pyridine from Aqueous Perchlorate Ion-Containing Solutions |
title_full |
Influence of the Adsorbate Structure and Surface Barrier at Micropores : The Adsorption on Columnar-Structured Gold Electrodes of Pyridine from Aqueous Perchlorate Ion-Containing Solutions |
title_fullStr |
Influence of the Adsorbate Structure and Surface Barrier at Micropores : The Adsorption on Columnar-Structured Gold Electrodes of Pyridine from Aqueous Perchlorate Ion-Containing Solutions |
title_full_unstemmed |
Influence of the Adsorbate Structure and Surface Barrier at Micropores : The Adsorption on Columnar-Structured Gold Electrodes of Pyridine from Aqueous Perchlorate Ion-Containing Solutions |
title_sort |
Influence of the Adsorbate Structure and Surface Barrier at Micropores : The Adsorption on Columnar-Structured Gold Electrodes of Pyridine from Aqueous Perchlorate Ion-Containing Solutions |
dc.creator.none.fl_str_mv |
Gómez, M. M. García, M. P. San Fabián, J. Vázquez, L. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
author |
Gómez, M. M. |
author_facet |
Gómez, M. M. García, M. P. San Fabián, J. Vázquez, L. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
author_role |
author |
author2 |
García, M. P. San Fabián, J. Vázquez, L. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Ciencias Exactas Química Gold Electrodes Pyridine Molecular adsorption |
topic |
Ciencias Exactas Química Gold Electrodes Pyridine Molecular adsorption |
dc.description.none.fl_txt_mv |
The electroadsorption on columnar Au electrodes (substrate) of pyridine from x M pyridine + 0.1 M HClO<sub>4</sub> and x M pyridine + 0.1 M KClO<sub>4</sub> aqueous solutions (10<sup>-3</sup> e x e 10<sup>-2</sup>), at constant potential and 298 K, was studied using voltammetry, chronocoulometry, and ac impedance combined with scanning tunneling microscopy to characterize the substrate topography. For a constant pyridine concentration (c), the degree of surface coverage by pyridine adsorbate (θ) diminished as R was increased. The θ vs c plots, irrespective of R, were interpreted by a Frumkin adsorption isotherm including a constant standard adsorption free energy. The evaluation of adsorption isotherms reflects the existence of an excluded volume effect, which can be related to a barrier effect due to adsorbates at nanometer size pore entrances. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas |
description |
The electroadsorption on columnar Au electrodes (substrate) of pyridine from x M pyridine + 0.1 M HClO<sub>4</sub> and x M pyridine + 0.1 M KClO<sub>4</sub> aqueous solutions (10<sup>-3</sup> e x e 10<sup>-2</sup>), at constant potential and 298 K, was studied using voltammetry, chronocoulometry, and ac impedance combined with scanning tunneling microscopy to characterize the substrate topography. For a constant pyridine concentration (c), the degree of surface coverage by pyridine adsorbate (θ) diminished as R was increased. The θ vs c plots, irrespective of R, were interpreted by a Frumkin adsorption isotherm including a constant standard adsorption free energy. The evaluation of adsorption isotherms reflects the existence of an excluded volume effect, which can be related to a barrier effect due to adsorbates at nanometer size pore entrances. |
publishDate |
1997 |
dc.date.none.fl_str_mv |
1997 |
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/10915/121285 |
url |
http://sedici.unlp.edu.ar/handle/10915/121285 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/0743-7463 info:eu-repo/semantics/altIdentifier/issn/1520-5827 info:eu-repo/semantics/altIdentifier/doi/10.1021/la950937r |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
dc.format.none.fl_str_mv |
application/pdf 1317-1326 |
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