Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes

The Ag electrodeposition on Pt spherical substrates was investigated over a wide range of experimental conditions to establish a correlation between the kinetics of the process and the different growth modes of the Ag overlayer. At E<sub>d</sub> ≊ E<sub>rev</sub>, the electro...

Descripción completa

Detalles Bibliográficos
Autores: Hernández Creus, A., Carro, P., González, S., Salvarezza, Roberto Carlos, Arvia, Alejandro Jorge
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:1992
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/119483
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/119483
Access Level:acceso abierto
Palabra clave:Ciencias Exactas
Química
Electrodeposition
Pt spherical substrates
Migration
id AR_84ffb6b751ea72e9ceaa39b748714fac
oai_identifier_str oai:sedici.unlp.edu.ar:10915/119483
network_acronym_str AR
network_name_str Argentina
repository_id_str
spelling Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodesHernández Creus, A.Carro, P.González, S.Salvarezza, Roberto CarlosArvia, Alejandro JorgeCiencias ExactasQuímicaElectrodepositionPt spherical substratesMigrationThe Ag electrodeposition on Pt spherical substrates was investigated over a wide range of experimental conditions to establish a correlation between the kinetics of the process and the different growth modes of the Ag overlayer. At E<sub>d</sub> ≊ E<sub>rev</sub>, the electrodeposition of the first Ag layer obeys a combined adsorption-desorption and nucleation and 2-D growth process under diffusion control. At E<sub>d</sub> ≊ E<sub>rev</sub>, the formation of the 2-D Ag layer proceeds through an adsorption mechanism, whereas the formation of the 3-D Ag layer fits a progressive nucleation and 3-D growth mechanism under diffusion control. Finally, when E<sub>d</sub> < E<sub>rev</sub>, a potential threshold related to Ag dendritic growth, the kinetics of the reaction apparently obeys a progressive nucleation and 1-D growth. This process is triggered at edges and corners of large Ag crystals. Dendritic growth takes place outside the diffusion layer defined around the Pt substrate sphere. In this case migration plays a substantial role in the process.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1992info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf2215-2227http://sedici.unlp.edu.ar/handle/10915/119483enginfo:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(92)85114-Zinfo: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:UNLP2024-05-08T13:06:22Zoai:sedici.unlp.edu.ar:10915/119483Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 13:06:22.522SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes
title Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes
spellingShingle Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes
Hernández Creus, A.
Ciencias Exactas
Química
Electrodeposition
Pt spherical substrates
Migration
title_short Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes
title_full Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes
title_fullStr Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes
title_full_unstemmed Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes
title_sort Electrochemical kinetics and growth modes of silver deposits on polyfaceted platinum spherical electrodes
dc.creator.none.fl_str_mv Hernández Creus, A.
Carro, P.
González, S.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author Hernández Creus, A.
author_facet Hernández Creus, A.
Carro, P.
González, S.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_role author
author2 Carro, P.
González, S.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Electrodeposition
Pt spherical substrates
Migration
topic Ciencias Exactas
Química
Electrodeposition
Pt spherical substrates
Migration
description The Ag electrodeposition on Pt spherical substrates was investigated over a wide range of experimental conditions to establish a correlation between the kinetics of the process and the different growth modes of the Ag overlayer. At E<sub>d</sub> ≊ E<sub>rev</sub>, the electrodeposition of the first Ag layer obeys a combined adsorption-desorption and nucleation and 2-D growth process under diffusion control. At E<sub>d</sub> ≊ E<sub>rev</sub>, the formation of the 2-D Ag layer proceeds through an adsorption mechanism, whereas the formation of the 3-D Ag layer fits a progressive nucleation and 3-D growth mechanism under diffusion control. Finally, when E<sub>d</sub> < E<sub>rev</sub>, a potential threshold related to Ag dendritic growth, the kinetics of the reaction apparently obeys a progressive nucleation and 1-D growth. This process is triggered at edges and corners of large Ag crystals. Dendritic growth takes place outside the diffusion layer defined around the Pt substrate sphere. In this case migration plays a substantial role in the process.
publishDate 1992
dc.date.none.fl_str_mv 1992
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/10915/119483
url http://sedici.unlp.edu.ar/handle/10915/119483
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0013-4686
info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(92)85114-Z
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
2215-2227
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
_version_ 1799194368052035584
score 15,812429

Similares en LA Referencia