Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>

Autores
Perdriel, Carlos L.; Arvia, Alejandro Jorge; Ipohorski, Miguel
Año de publicación
1986
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Electrochemical faceting of polycrystalline (pc) gold electrodes in 1 M H2SO4 was investigated by employing wire and bead-shaped electrodes. Electrochemical faceting was produced by applying a repetitive symmetrical square wave potential signal in the 2–4 kHz range and upper and lower potential limits ranging between 1.44 and 1.60 V (vs. RHE) and 0.10 and 1.10 V, respectively. The degree of faceting was followed voltammetrically principally through the O-electroadsorption/electrodesorption process. Electrochemical information was complemented with scanning electron microscopic observations. The results are discussed in terms of the equilibrium potential of reactions involving different gold species, and the potential of zero charge, hydrophobicity and anion adsorbability of the (110), (100) and (111) crystallographic faces of gold. The kinetics of electrochemical faceting of gold can be explained through the two-stage mechanism proposed earlier for polycrystalline platinum in acid electrolyte.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Facultad de Ciencias Exactas
Materia
Ciencias Exactas
Química
Electroquímica
polycrystalline
Oro
scanning electron microscopy
Cristalografía
Cinética química
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:10915/84458
Acceder
id SEDICI_d820a24e67698119b79c755082796482
oai_identifier_str oai:sedici.unlp.edu.ar:10915/84458
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>Perdriel, Carlos L.Arvia, Alejandro JorgeIpohorski, MiguelCiencias ExactasQuímicaElectroquímicapolycrystallineOroscanning electron microscopyCristalografíaCinética químicaElectrochemical faceting of polycrystalline (pc) gold electrodes in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub> was investigated by employing wire and bead-shaped electrodes. Electrochemical faceting was produced by applying a repetitive symmetrical square wave potential signal in the 2–4 kHz range and upper and lower potential limits ranging between 1.44 and 1.60 V (vs. RHE) and 0.10 and 1.10 V, respectively. The degree of faceting was followed voltammetrically principally through the O-electroadsorption/electrodesorption process. Electrochemical information was complemented with scanning electron microscopic observations. The results are discussed in terms of the equilibrium potential of reactions involving different gold species, and the potential of zero charge, hydrophobicity and anion adsorbability of the (110), (100) and (111) crystallographic faces of gold. The kinetics of electrochemical faceting of gold can be explained through the two-stage mechanism proposed earlier for polycrystalline platinum in acid electrolyte.Instituto de Investigaciones Fisicoquímicas Teóricas y AplicadasFacultad de Ciencias Exactas1986-12-24info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf317-329http://sedici.unlp.edu.ar/handle/10915/84458enginfo:eu-repo/semantics/altIdentifier/issn/0022-0728info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(86)87025-5info: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:UNLP2025-10-15T11:08:16Zoai:sedici.unlp.edu.ar:10915/84458Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:08:16.759SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
title Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
spellingShingle Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
Perdriel, Carlos L.
Ciencias Exactas
Química
Electroquímica
polycrystalline
Oro
scanning electron microscopy
Cristalografía
Cinética química
title_short Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
title_full Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
title_fullStr Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
title_full_unstemmed Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
title_sort Electrochemical faceting of polycrystalline gold in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub>
dc.creator.none.fl_str_mv Perdriel, Carlos L.
Arvia, Alejandro Jorge
Ipohorski, Miguel
author Perdriel, Carlos L.
author_facet Perdriel, Carlos L.
Arvia, Alejandro Jorge
Ipohorski, Miguel
author_role author
author2 Arvia, Alejandro Jorge
Ipohorski, Miguel
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Electroquímica
polycrystalline
Oro
scanning electron microscopy
Cristalografía
Cinética química
topic Ciencias Exactas
Química
Electroquímica
polycrystalline
Oro
scanning electron microscopy
Cristalografía
Cinética química
dc.description.none.fl_txt_mv Electrochemical faceting of polycrystalline (pc) gold electrodes in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub> was investigated by employing wire and bead-shaped electrodes. Electrochemical faceting was produced by applying a repetitive symmetrical square wave potential signal in the 2–4 kHz range and upper and lower potential limits ranging between 1.44 and 1.60 V (vs. RHE) and 0.10 and 1.10 V, respectively. The degree of faceting was followed voltammetrically principally through the O-electroadsorption/electrodesorption process. Electrochemical information was complemented with scanning electron microscopic observations. The results are discussed in terms of the equilibrium potential of reactions involving different gold species, and the potential of zero charge, hydrophobicity and anion adsorbability of the (110), (100) and (111) crystallographic faces of gold. The kinetics of electrochemical faceting of gold can be explained through the two-stage mechanism proposed earlier for polycrystalline platinum in acid electrolyte.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Facultad de Ciencias Exactas
description Electrochemical faceting of polycrystalline (pc) gold electrodes in 1 <i>M</i> H<sub>2</sub>SO<sub>4</sub> was investigated by employing wire and bead-shaped electrodes. Electrochemical faceting was produced by applying a repetitive symmetrical square wave potential signal in the 2–4 kHz range and upper and lower potential limits ranging between 1.44 and 1.60 V (vs. RHE) and 0.10 and 1.10 V, respectively. The degree of faceting was followed voltammetrically principally through the O-electroadsorption/electrodesorption process. Electrochemical information was complemented with scanning electron microscopic observations. The results are discussed in terms of the equilibrium potential of reactions involving different gold species, and the potential of zero charge, hydrophobicity and anion adsorbability of the (110), (100) and (111) crystallographic faces of gold. The kinetics of electrochemical faceting of gold can be explained through the two-stage mechanism proposed earlier for polycrystalline platinum in acid electrolyte.
publishDate 1986
dc.date.none.fl_str_mv 1986-12-24
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/10915/84458
url http://sedici.unlp.edu.ar/handle/10915/84458
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0022-0728
info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(86)87025-5
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
317-329
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 12.891075

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