Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes

Autores
Gómez, J.; Vázquez, L.; Baró, A. M.; Alonso, C.; González, E.; Gónzalez Velasco, J.; Arvia, Alejandro Jorge
Año de publicación
1988
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Images of large active surface (electrodispersed) gold electrodes obtained by electroreduction of an oxide layer grown by applying a fast periodic square wave potential to polycrystalline specimens, have been obtained by STM and SEM. For the first time a correlation of imaging data of both microscopes can be established which allows one to find different structural details of these electrodes. The roughening increase produced by the electrochemical activation is explained tentatively through a generalized structural model consisting of an overlayer of sticking spheres of about 10 nm average diameter leaving inner interconnected channels of nearly the same average diameter and penetrating in the overlayer structure. The size of the spherical units is comparable to that of metal clusters involving the optimal ratio of surface to bulk atoms associated with the greatest catalytic activity.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Ciencias Exactas
Química
gold electrodes
scanning tunneling microscopy
scanning electron microscopy
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/127150
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/127150
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodesGómez, J.Vázquez, L.Baró, A. M.Alonso, C.González, E.Gónzalez Velasco, J.Arvia, Alejandro JorgeCiencias ExactasQuímicagold electrodesscanning tunneling microscopyscanning electron microscopyImages of large active surface (electrodispersed) gold electrodes obtained by electroreduction of an oxide layer grown by applying a fast periodic square wave potential to polycrystalline specimens, have been obtained by STM and SEM. For the first time a correlation of imaging data of both microscopes can be established which allows one to find different structural details of these electrodes. The roughening increase produced by the electrochemical activation is explained tentatively through a generalized structural model consisting of an overlayer of sticking spheres of about 10 nm average diameter leaving inner interconnected channels of nearly the same average diameter and penetrating in the overlayer structure. The size of the spherical units is comparable to that of metal clusters involving the optimal ratio of surface to bulk atoms associated with the greatest catalytic activity.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1988info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf77-87http://sedici.unlp.edu.ar/handle/10915/127150enginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/0022072888803140info:eu-repo/semantics/altIdentifier/issn/0022-0728info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(88)80314-0info: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:UNLP2025-09-03T11:02:49Zoai:sedici.unlp.edu.ar:10915/127150Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 11:02:49.617SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
title Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
spellingShingle Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
Gómez, J.
Ciencias Exactas
Química
gold electrodes
scanning tunneling microscopy
scanning electron microscopy
title_short Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
title_full Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
title_fullStr Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
title_full_unstemmed Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
title_sort Scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) of electrodispersed gold electrodes
dc.creator.none.fl_str_mv Gómez, J.
Vázquez, L.
Baró, A. M.
Alonso, C.
González, E.
Gónzalez Velasco, J.
Arvia, Alejandro Jorge
author Gómez, J.
author_facet Gómez, J.
Vázquez, L.
Baró, A. M.
Alonso, C.
González, E.
Gónzalez Velasco, J.
Arvia, Alejandro Jorge
author_role author
author2 Vázquez, L.
Baró, A. M.
Alonso, C.
González, E.
Gónzalez Velasco, J.
Arvia, Alejandro Jorge
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
gold electrodes
scanning tunneling microscopy
scanning electron microscopy
topic Ciencias Exactas
Química
gold electrodes
scanning tunneling microscopy
scanning electron microscopy
dc.description.none.fl_txt_mv Images of large active surface (electrodispersed) gold electrodes obtained by electroreduction of an oxide layer grown by applying a fast periodic square wave potential to polycrystalline specimens, have been obtained by STM and SEM. For the first time a correlation of imaging data of both microscopes can be established which allows one to find different structural details of these electrodes. The roughening increase produced by the electrochemical activation is explained tentatively through a generalized structural model consisting of an overlayer of sticking spheres of about 10 nm average diameter leaving inner interconnected channels of nearly the same average diameter and penetrating in the overlayer structure. The size of the spherical units is comparable to that of metal clusters involving the optimal ratio of surface to bulk atoms associated with the greatest catalytic activity.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description Images of large active surface (electrodispersed) gold electrodes obtained by electroreduction of an oxide layer grown by applying a fast periodic square wave potential to polycrystalline specimens, have been obtained by STM and SEM. For the first time a correlation of imaging data of both microscopes can be established which allows one to find different structural details of these electrodes. The roughening increase produced by the electrochemical activation is explained tentatively through a generalized structural model consisting of an overlayer of sticking spheres of about 10 nm average diameter leaving inner interconnected channels of nearly the same average diameter and penetrating in the overlayer structure. The size of the spherical units is comparable to that of metal clusters involving the optimal ratio of surface to bulk atoms associated with the greatest catalytic activity.
publishDate 1988
dc.date.none.fl_str_mv 1988
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/10915/127150
url http://sedici.unlp.edu.ar/handle/10915/127150
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/0022072888803140
info:eu-repo/semantics/altIdentifier/issn/0022-0728
info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(88)80314-0
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
77-87
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 13.13397

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