The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions

Autores
Gomez Becerra, J.; Salvarezza, Roberto Carlos; Arvia, Alejandro Jorge
Año de publicación
1988
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Evidences of a slow Cu(OH)2 phase formation with data resulting from potentiodynamic potentiostatic and rotating-ring-disc techniques were obtained during the anodization of copper in 0.1 M NaOH. According to the potential and time windows employed in the different runs, electrochemical results can be explained by admitting two limiting complex structures of the anodic layers namely Cu/Cu2O (porous inner layer)/CuO (outer layer) and Cu/Cu2O (porous inner layer)/CuO/Cu(OH)2 (outer layer). The formation of the Cu(OH)2 layer fits a progressive nucleation and 2-D growth under charge transfer control in the −0.175 ⩽ E ⩽ −0.10 V range and an instantaneous nucleation and 2-D growth mechanism under charge transfer control in the −0.20 ⩽ E ⩽ −0.18 V. A well-defined voltammetric peak multiplicity can be distinguished for the electrochemical of each complex anodic layer. These results furnish a reasonable explanation to discrepancies observed in the literature for the electroformation and electroreduction of anodic layers formed on copper in alkaline solutions.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA)
Facultad de Ciencias Exactas
Materia
Ciencias Exactas
Química
Electroquímica
Cobre
Discos Rotatorios
potentiodynamic
alkaline solutions
electroreduction
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:10915/79926
Acceder
id SEDICI_dfd7f3afedaef2987eaa4d9e9f53b092
oai_identifier_str oai:sedici.unlp.edu.ar:10915/79926
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutionsGomez Becerra, J.Salvarezza, Roberto CarlosArvia, Alejandro JorgeCiencias ExactasQuímicaElectroquímicaCobreDiscos Rotatoriospotentiodynamicalkaline solutionselectroreductionEvidences of a slow Cu(OH)<sub>2</sub> phase formation with data resulting from potentiodynamic potentiostatic and rotating-ring-disc techniques were obtained during the anodization of copper in 0.1 M NaOH. According to the potential and time windows employed in the different runs, electrochemical results can be explained by admitting two limiting complex structures of the anodic layers namely Cu/Cu<sub>2</sub>O (porous inner layer)/CuO (outer layer) and Cu/Cu<sub>2</sub>O (porous inner layer)/CuO/Cu(OH)<sub>2</sub> (outer layer). The formation of the Cu(OH)<sub>2</sub> layer fits a progressive nucleation and 2-D growth under charge transfer control in the −0.175 ⩽ E ⩽ −0.10 V range and an instantaneous nucleation and 2-D growth mechanism under charge transfer control in the −0.20 ⩽ E ⩽ −0.18 V. A well-defined voltammetric peak multiplicity can be distinguished for the electrochemical of each complex anodic layer. These results furnish a reasonable explanation to discrepancies observed in the literature for the electroformation and electroreduction of anodic layers formed on copper in alkaline solutions.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA)Facultad de Ciencias Exactas1988-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf613-621http://sedici.unlp.edu.ar/handle/10915/79926enginfo:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(88)80059-8info: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:UNLP2025-09-03T10:46:52Zoai:sedici.unlp.edu.ar:10915/79926Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 10:46:52.751SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions
title The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions
spellingShingle The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions
Gomez Becerra, J.
Ciencias Exactas
Química
Electroquímica
Cobre
Discos Rotatorios
potentiodynamic
alkaline solutions
electroreduction
title_short The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions
title_full The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions
title_fullStr The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions
title_full_unstemmed The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions
title_sort The influence of slow Cu(OH)<sub>2</sub> phase formation on the electrochemical behaviour of copper in alkaline solutions
dc.creator.none.fl_str_mv Gomez Becerra, J.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author Gomez Becerra, J.
author_facet Gomez Becerra, J.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_role author
author2 Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Electroquímica
Cobre
Discos Rotatorios
potentiodynamic
alkaline solutions
electroreduction
topic Ciencias Exactas
Química
Electroquímica
Cobre
Discos Rotatorios
potentiodynamic
alkaline solutions
electroreduction
dc.description.none.fl_txt_mv Evidences of a slow Cu(OH)<sub>2</sub> phase formation with data resulting from potentiodynamic potentiostatic and rotating-ring-disc techniques were obtained during the anodization of copper in 0.1 M NaOH. According to the potential and time windows employed in the different runs, electrochemical results can be explained by admitting two limiting complex structures of the anodic layers namely Cu/Cu<sub>2</sub>O (porous inner layer)/CuO (outer layer) and Cu/Cu<sub>2</sub>O (porous inner layer)/CuO/Cu(OH)<sub>2</sub> (outer layer). The formation of the Cu(OH)<sub>2</sub> layer fits a progressive nucleation and 2-D growth under charge transfer control in the −0.175 ⩽ E ⩽ −0.10 V range and an instantaneous nucleation and 2-D growth mechanism under charge transfer control in the −0.20 ⩽ E ⩽ −0.18 V. A well-defined voltammetric peak multiplicity can be distinguished for the electrochemical of each complex anodic layer. These results furnish a reasonable explanation to discrepancies observed in the literature for the electroformation and electroreduction of anodic layers formed on copper in alkaline solutions.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA)
Facultad de Ciencias Exactas
description Evidences of a slow Cu(OH)<sub>2</sub> phase formation with data resulting from potentiodynamic potentiostatic and rotating-ring-disc techniques were obtained during the anodization of copper in 0.1 M NaOH. According to the potential and time windows employed in the different runs, electrochemical results can be explained by admitting two limiting complex structures of the anodic layers namely Cu/Cu<sub>2</sub>O (porous inner layer)/CuO (outer layer) and Cu/Cu<sub>2</sub>O (porous inner layer)/CuO/Cu(OH)<sub>2</sub> (outer layer). The formation of the Cu(OH)<sub>2</sub> layer fits a progressive nucleation and 2-D growth under charge transfer control in the −0.175 ⩽ E ⩽ −0.10 V range and an instantaneous nucleation and 2-D growth mechanism under charge transfer control in the −0.20 ⩽ E ⩽ −0.18 V. A well-defined voltammetric peak multiplicity can be distinguished for the electrochemical of each complex anodic layer. These results furnish a reasonable explanation to discrepancies observed in the literature for the electroformation and electroreduction of anodic layers formed on copper in alkaline solutions.
publishDate 1988
dc.date.none.fl_str_mv 1988-05
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/10915/79926
url http://sedici.unlp.edu.ar/handle/10915/79926
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(88)80059-8
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
613-621
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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