Dynamics of surface alloying promoted by cadmium underpotential deposition-anodic stripping cycles on irregular silver electrodeposits

Autores
Martins, M. E.; Hernández-Creus, A.; Salvarezza, Roberto Carlos; Arvia, Alejandro Jorge
Año de publicación
1994
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The underpotential deposition of Cd from dilute aqueous 5 × 10−3 M CdSO4 + 0.5 M Na2SO4 + 0.01 M H2SO4 on Ag electrodeposits grown on polyfaceted Pt single-crystal microspheres was studied using potentiodynamic and potentiostatic techniques, transmission electron diffraction, scanning tunneling microscopy and X-ray photoelectron spectroscopy. Ag electrodeposits were grown in 5 × 10−3 M Ag2SO4 + 0.5 M Na2SO4 + 0.01 M H2SO4 at cathodic overpotentials ηc of −0.06 V and −0.58 V to form a columnar and dendritic Ag surface respectively. Surface rearrangement processes involving the formation of Cd + Ag alloys were studied by stripping voltammetry after the potential was held for a certain time at different preset values covering the potential range in which the degree of surface coverage by Cd atoms was less than or close to unity (θc⩽ 1) on both Ag surfaces. Surface diffusion and penetration of Cd atoms into bulk Ag for θc⩽ 1 are discussed. A place-exchange mechanism is advanced to account for the kinetics of Cd + Ag alloy formation.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Química
Ciencias Exactas
Cadmium
Irregular silver electrodeposits
Scanning tunneling microscopy
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:10915/119361
Acceder
id SEDICI_8bcc3ba0121e5b249a2701a3c58a3935
oai_identifier_str oai:sedici.unlp.edu.ar:10915/119361
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Dynamics of surface alloying promoted by cadmium underpotential deposition-anodic stripping cycles on irregular silver electrodepositsMartins, M. E.Hernández-Creus, A.Salvarezza, Roberto CarlosArvia, Alejandro JorgeQuímicaCiencias ExactasCadmiumIrregular silver electrodepositsScanning tunneling microscopyThe underpotential deposition of Cd from dilute aqueous 5 × 10<sup>−3</sup> M CdSO<sub>4</sub> + 0.5 M Na<sub>2</sub>SO<sub>4</sub> + 0.01 M H<sub>2</sub>SO<sub>4</sub> on Ag electrodeposits grown on polyfaceted Pt single-crystal microspheres was studied using potentiodynamic and potentiostatic techniques, transmission electron diffraction, scanning tunneling microscopy and X-ray photoelectron spectroscopy. Ag electrodeposits were grown in 5 × 10<sup>−3</sup> M Ag<sub>2</sub>SO<sub>4</sub> + 0.5 M Na<sub>2</sub>SO<sub>4</sub> + 0.01 M H<sub>2</sub>SO<sub>4</sub> at cathodic overpotentials η<sub>c</sub> of −0.06 V and −0.58 V to form a columnar and dendritic Ag surface respectively. Surface rearrangement processes involving the formation of Cd + Ag alloys were studied by stripping voltammetry after the potential was held for a certain time at different preset values covering the potential range in which the degree of surface coverage by Cd atoms was less than or close to unity (θ<sub>c</sub>⩽ 1) on both Ag surfaces. Surface diffusion and penetration of Cd atoms into bulk Ag for θ<sub>c</sub>⩽ 1 are discussed. A place-exchange mechanism is advanced to account for the kinetics of Cd + Ag alloy formation.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1994info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf141-155http://sedici.unlp.edu.ar/handle/10915/119361enginfo:eu-repo/semantics/altIdentifier/issn/1572-6657info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(94)03395-1info: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:UNLP2025-09-03T11:00:16Zoai:sedici.unlp.edu.ar:10915/119361Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 11:00:17.048SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Dynamics of surface alloying promoted by cadmium underpotential deposition-anodic stripping cycles on irregular silver electrodeposits
title Dynamics of surface alloying promoted by cadmium underpotential deposition-anodic stripping cycles on irregular silver electrodeposits
spellingShingle Dynamics of surface alloying promoted by cadmium underpotential deposition-anodic stripping cycles on irregular silver electrodeposits
Martins, M. E.
Química
Ciencias Exactas
Cadmium
Irregular silver electrodeposits
Scanning tunneling microscopy
title_short Dynamics of surface alloying promoted by cadmium underpotential deposition-anodic stripping cycles on irregular silver electrodeposits
title_full Dynamics of surface alloying promoted by cadmium underpotential deposition-anodic stripping cycles on irregular silver electrodeposits
title_fullStr Dynamics of surface alloying promoted by cadmium underpotential deposition-anodic stripping cycles on irregular silver electrodeposits
title_full_unstemmed Dynamics of surface alloying promoted by cadmium underpotential deposition-anodic stripping cycles on irregular silver electrodeposits
title_sort Dynamics of surface alloying promoted by cadmium underpotential deposition-anodic stripping cycles on irregular silver electrodeposits
dc.creator.none.fl_str_mv Martins, M. E.
Hernández-Creus, A.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author Martins, M. E.
author_facet Martins, M. E.
Hernández-Creus, A.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_role author
author2 Hernández-Creus, A.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author2_role author
author
author
dc.subject.none.fl_str_mv Química
Ciencias Exactas
Cadmium
Irregular silver electrodeposits
Scanning tunneling microscopy
topic Química
Ciencias Exactas
Cadmium
Irregular silver electrodeposits
Scanning tunneling microscopy
dc.description.none.fl_txt_mv The underpotential deposition of Cd from dilute aqueous 5 × 10<sup>−3</sup> M CdSO<sub>4</sub> + 0.5 M Na<sub>2</sub>SO<sub>4</sub> + 0.01 M H<sub>2</sub>SO<sub>4</sub> on Ag electrodeposits grown on polyfaceted Pt single-crystal microspheres was studied using potentiodynamic and potentiostatic techniques, transmission electron diffraction, scanning tunneling microscopy and X-ray photoelectron spectroscopy. Ag electrodeposits were grown in 5 × 10<sup>−3</sup> M Ag<sub>2</sub>SO<sub>4</sub> + 0.5 M Na<sub>2</sub>SO<sub>4</sub> + 0.01 M H<sub>2</sub>SO<sub>4</sub> at cathodic overpotentials η<sub>c</sub> of −0.06 V and −0.58 V to form a columnar and dendritic Ag surface respectively. Surface rearrangement processes involving the formation of Cd + Ag alloys were studied by stripping voltammetry after the potential was held for a certain time at different preset values covering the potential range in which the degree of surface coverage by Cd atoms was less than or close to unity (θ<sub>c</sub>⩽ 1) on both Ag surfaces. Surface diffusion and penetration of Cd atoms into bulk Ag for θ<sub>c</sub>⩽ 1 are discussed. A place-exchange mechanism is advanced to account for the kinetics of Cd + Ag alloy formation.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description The underpotential deposition of Cd from dilute aqueous 5 × 10<sup>−3</sup> M CdSO<sub>4</sub> + 0.5 M Na<sub>2</sub>SO<sub>4</sub> + 0.01 M H<sub>2</sub>SO<sub>4</sub> on Ag electrodeposits grown on polyfaceted Pt single-crystal microspheres was studied using potentiodynamic and potentiostatic techniques, transmission electron diffraction, scanning tunneling microscopy and X-ray photoelectron spectroscopy. Ag electrodeposits were grown in 5 × 10<sup>−3</sup> M Ag<sub>2</sub>SO<sub>4</sub> + 0.5 M Na<sub>2</sub>SO<sub>4</sub> + 0.01 M H<sub>2</sub>SO<sub>4</sub> at cathodic overpotentials η<sub>c</sub> of −0.06 V and −0.58 V to form a columnar and dendritic Ag surface respectively. Surface rearrangement processes involving the formation of Cd + Ag alloys were studied by stripping voltammetry after the potential was held for a certain time at different preset values covering the potential range in which the degree of surface coverage by Cd atoms was less than or close to unity (θ<sub>c</sub>⩽ 1) on both Ag surfaces. Surface diffusion and penetration of Cd atoms into bulk Ag for θ<sub>c</sub>⩽ 1 are discussed. A place-exchange mechanism is advanced to account for the kinetics of Cd + Ag alloy formation.
publishDate 1994
dc.date.none.fl_str_mv 1994
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/10915/119361
url http://sedici.unlp.edu.ar/handle/10915/119361
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1572-6657
info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(94)03395-1
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
141-155
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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