Scanning Tunneling Microscopy, Voltammetry, and X-ray Photoelectron Spectroscopy Study of the Early Stages of Electrochemical Faceting of Gold (111) in Aqueous Sulfuric and Perchlo...

Autores
Rodriguez Nieto, Felipe Jorge; Andreasen, Gustavo; Martins, María Elisa; Castez, Marcos Federico; Salvarezza, Roberto Carlos; Arvia, Alejandro Jorge
Año de publicación
2003
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The mechanism of the early stages of the electrochemical faceting of Au(111) in 1 M aqueous sulfuric and 1 M aqueous perchloric acid was investigated, at room temperature, combining voltammetry, scanning tunneling microscopy, and X-ray photoelectronic spectroscopy data. The analysis of the first electro-oxidation scan indicates that the formation of OH- and O-electroadsorbed species is accompanied by 2D clustering. Subsequent electro-oxidation scans involve the participation of deeper Au(111) atom layers. Clustering effects are favored by the presence of specifically adsorbed anions. After the electro-oxidation scan, the subsequent fast electroreduction of OH- and O-adsorbates initially produces spinoidal patterns that disappear by clustering, 2D metal island growth at different lattice levels, coalescence of islands, and 2D Ostwald ripening. This complex mechanism involves the participation of cooperative surface phenomena. Repetitive electro-oxidation/electroreduction potential cycling assists the formation of small 3D crystallites leading to Au(111) surface faceting.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Ciencias Exactas
Química
electrochemical faceting
electro-oxidation scan
anions
gold
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:10915/127429
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/127429
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Scanning Tunneling Microscopy, Voltammetry, and X-ray Photoelectron Spectroscopy Study of the Early Stages of Electrochemical Faceting of Gold (111) in Aqueous Sulfuric and Perchloric AcidRodriguez Nieto, Felipe JorgeAndreasen, GustavoMartins, María ElisaCastez, Marcos FedericoSalvarezza, Roberto CarlosArvia, Alejandro JorgeCiencias ExactasQuímicaelectrochemical facetingelectro-oxidation scananionsgoldThe mechanism of the early stages of the electrochemical faceting of Au(111) in 1 M aqueous sulfuric and 1 M aqueous perchloric acid was investigated, at room temperature, combining voltammetry, scanning tunneling microscopy, and X-ray photoelectronic spectroscopy data. The analysis of the first electro-oxidation scan indicates that the formation of OH- and O-electroadsorbed species is accompanied by 2D clustering. Subsequent electro-oxidation scans involve the participation of deeper Au(111) atom layers. Clustering effects are favored by the presence of specifically adsorbed anions. After the electro-oxidation scan, the subsequent fast electroreduction of OH- and O-adsorbates initially produces spinoidal patterns that disappear by clustering, 2D metal island growth at different lattice levels, coalescence of islands, and 2D Ostwald ripening. This complex mechanism involves the participation of cooperative surface phenomena. Repetitive electro-oxidation/electroreduction potential cycling assists the formation of small 3D crystallites leading to Au(111) surface faceting.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas2003info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf11452-11466http://sedici.unlp.edu.ar/handle/10915/127429enginfo:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/jp0353542info:eu-repo/semantics/altIdentifier/issn/1520-6106info:eu-repo/semantics/altIdentifier/issn/1520-5207info:eu-repo/semantics/altIdentifier/doi/10.1021/jp0353542info: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:UNLP2025-09-03T11:02:53Zoai:sedici.unlp.edu.ar:10915/127429Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 11:02:53.62SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Scanning Tunneling Microscopy, Voltammetry, and X-ray Photoelectron Spectroscopy Study of the Early Stages of Electrochemical Faceting of Gold (111) in Aqueous Sulfuric and Perchloric Acid
title Scanning Tunneling Microscopy, Voltammetry, and X-ray Photoelectron Spectroscopy Study of the Early Stages of Electrochemical Faceting of Gold (111) in Aqueous Sulfuric and Perchloric Acid
spellingShingle Scanning Tunneling Microscopy, Voltammetry, and X-ray Photoelectron Spectroscopy Study of the Early Stages of Electrochemical Faceting of Gold (111) in Aqueous Sulfuric and Perchloric Acid
Rodriguez Nieto, Felipe Jorge
Ciencias Exactas
Química
electrochemical faceting
electro-oxidation scan
anions
gold
title_short Scanning Tunneling Microscopy, Voltammetry, and X-ray Photoelectron Spectroscopy Study of the Early Stages of Electrochemical Faceting of Gold (111) in Aqueous Sulfuric and Perchloric Acid
title_full Scanning Tunneling Microscopy, Voltammetry, and X-ray Photoelectron Spectroscopy Study of the Early Stages of Electrochemical Faceting of Gold (111) in Aqueous Sulfuric and Perchloric Acid
title_fullStr Scanning Tunneling Microscopy, Voltammetry, and X-ray Photoelectron Spectroscopy Study of the Early Stages of Electrochemical Faceting of Gold (111) in Aqueous Sulfuric and Perchloric Acid
title_full_unstemmed Scanning Tunneling Microscopy, Voltammetry, and X-ray Photoelectron Spectroscopy Study of the Early Stages of Electrochemical Faceting of Gold (111) in Aqueous Sulfuric and Perchloric Acid
title_sort Scanning Tunneling Microscopy, Voltammetry, and X-ray Photoelectron Spectroscopy Study of the Early Stages of Electrochemical Faceting of Gold (111) in Aqueous Sulfuric and Perchloric Acid
dc.creator.none.fl_str_mv Rodriguez Nieto, Felipe Jorge
Andreasen, Gustavo
Martins, María Elisa
Castez, Marcos Federico
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author Rodriguez Nieto, Felipe Jorge
author_facet Rodriguez Nieto, Felipe Jorge
Andreasen, Gustavo
Martins, María Elisa
Castez, Marcos Federico
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_role author
author2 Andreasen, Gustavo
Martins, María Elisa
Castez, Marcos Federico
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
electrochemical faceting
electro-oxidation scan
anions
gold
topic Ciencias Exactas
Química
electrochemical faceting
electro-oxidation scan
anions
gold
dc.description.none.fl_txt_mv The mechanism of the early stages of the electrochemical faceting of Au(111) in 1 M aqueous sulfuric and 1 M aqueous perchloric acid was investigated, at room temperature, combining voltammetry, scanning tunneling microscopy, and X-ray photoelectronic spectroscopy data. The analysis of the first electro-oxidation scan indicates that the formation of OH- and O-electroadsorbed species is accompanied by 2D clustering. Subsequent electro-oxidation scans involve the participation of deeper Au(111) atom layers. Clustering effects are favored by the presence of specifically adsorbed anions. After the electro-oxidation scan, the subsequent fast electroreduction of OH- and O-adsorbates initially produces spinoidal patterns that disappear by clustering, 2D metal island growth at different lattice levels, coalescence of islands, and 2D Ostwald ripening. This complex mechanism involves the participation of cooperative surface phenomena. Repetitive electro-oxidation/electroreduction potential cycling assists the formation of small 3D crystallites leading to Au(111) surface faceting.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description The mechanism of the early stages of the electrochemical faceting of Au(111) in 1 M aqueous sulfuric and 1 M aqueous perchloric acid was investigated, at room temperature, combining voltammetry, scanning tunneling microscopy, and X-ray photoelectronic spectroscopy data. The analysis of the first electro-oxidation scan indicates that the formation of OH- and O-electroadsorbed species is accompanied by 2D clustering. Subsequent electro-oxidation scans involve the participation of deeper Au(111) atom layers. Clustering effects are favored by the presence of specifically adsorbed anions. After the electro-oxidation scan, the subsequent fast electroreduction of OH- and O-adsorbates initially produces spinoidal patterns that disappear by clustering, 2D metal island growth at different lattice levels, coalescence of islands, and 2D Ostwald ripening. This complex mechanism involves the participation of cooperative surface phenomena. Repetitive electro-oxidation/electroreduction potential cycling assists the formation of small 3D crystallites leading to Au(111) surface faceting.
publishDate 2003
dc.date.none.fl_str_mv 2003
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/10915/127429
url http://sedici.unlp.edu.ar/handle/10915/127429
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/jp0353542
info:eu-repo/semantics/altIdentifier/issn/1520-6106
info:eu-repo/semantics/altIdentifier/issn/1520-5207
info:eu-repo/semantics/altIdentifier/doi/10.1021/jp0353542
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
11452-11466
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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