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
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/121285
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/121285
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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling 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:UNLP2025-10-22T17:09:40Zoai: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:13292025-10-22 17:09:40.54SEDICI (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
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 12.982451

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