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

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...

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Autores principales: Gómez, M. M., García, M. P., San Fabián, J., Vázquez, L., Salvarezza, Roberto Carlos, Arvia, Alejandro Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 1997
Materias:
Ciencias Exactas
Química
Gold Electrodes
Pyridine
Molecular adsorption
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/121285
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-121285
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
Gold Electrodes
Pyridine
Molecular adsorption
spellingShingle Ciencias Exactas
Química
Gold Electrodes
Pyridine
Molecular adsorption
Gómez, M. M.
García, M. P.
San Fabián, J.
Vázquez, L.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
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
topic_facet Ciencias Exactas
Química
Gold Electrodes
Pyridine
Molecular adsorption
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.
format Articulo
Articulo
author Gómez, M. M.
García, M. P.
San Fabián, J.
Vázquez, L.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_facet Gómez, M. M.
García, M. P.
San Fabián, J.
Vázquez, L.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_sort Gómez, M. M.
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
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
publishDate 1997
url http://sedici.unlp.edu.ar/handle/10915/121285
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