The electrochemical behaviour of polycrystalline nickel electrodes in different carbonate-bicarbonate ion-containing solutions
- Autores
- Bohé, A. E.; Vilche, Jorge Roberto; Arvia, Alejandro Jorge
- Año de publicación
- 1990
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The dissolution and passivation of polycrystalline nickel in carbonate-bicarbonate ion-containing solutions covering wide ranges of pH and electrolyte concentration were investigated by employing voltammetric, galvanostatic and potentiostatic transient techniques. Results obtained with a rotating disc electrode allow the competing reactions related to the active-passive transition to be distinguished through the influence of the potential sweep rate and the rotation speed on the electrochemical behaviour of the system at fixed concentrations of either carbonate or bicarbonate ion. The first oxidation level of nickel corresponds mainly to Ni(OH)2 formation, the chemical dissolution of the surface layer and the precipitation of NiCO3 and Ni(OH)2. The partial removal of the prepassive layer is predominantly assisted by both the bicarbonate ion concentration and the electrode rotation. In the presence of chloride ions the formation of soluble Ni(II) species and NiCo3 in the potential range of the first oxidation level appears to be enhanced. This effect can be interpreted by taking into account competitive adsorption processes at the base metal between Cl− and OH− ions.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas - Materia
-
Química
Ciencias Exactas
polycrystalline nickel
electrolyte concentration
pH - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/139854
Ver los metadatos del registro completo
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The electrochemical behaviour of polycrystalline nickel electrodes in different carbonate-bicarbonate ion-containing solutionsBohé, A. E.Vilche, Jorge RobertoArvia, Alejandro JorgeQuímicaCiencias Exactaspolycrystalline nickelelectrolyte concentrationpHThe dissolution and passivation of polycrystalline nickel in carbonate-bicarbonate ion-containing solutions covering wide ranges of pH and electrolyte concentration were investigated by employing voltammetric, galvanostatic and potentiostatic transient techniques. Results obtained with a rotating disc electrode allow the competing reactions related to the active-passive transition to be distinguished through the influence of the potential sweep rate and the rotation speed on the electrochemical behaviour of the system at fixed concentrations of either carbonate or bicarbonate ion. The first oxidation level of nickel corresponds mainly to Ni(OH)2 formation, the chemical dissolution of the surface layer and the precipitation of NiCO3 and Ni(OH)2. The partial removal of the prepassive layer is predominantly assisted by both the bicarbonate ion concentration and the electrode rotation. In the presence of chloride ions the formation of soluble Ni(II) species and NiCo3 in the potential range of the first oxidation level appears to be enhanced. This effect can be interpreted by taking into account competitive adsorption processes at the base metal between Cl− and OH− ions.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1990info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf418-426http://sedici.unlp.edu.ar/handle/10915/139854enginfo:eu-repo/semantics/altIdentifier/issn/0021-891xinfo:eu-repo/semantics/altIdentifier/issn/1572-8838info:eu-repo/semantics/altIdentifier/doi/10.1007/bf01076050info: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:UNLP2025-10-22T17:13:01Zoai:sedici.unlp.edu.ar:10915/139854Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:13:01.538SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
The electrochemical behaviour of polycrystalline nickel electrodes in different carbonate-bicarbonate ion-containing solutions |
title |
The electrochemical behaviour of polycrystalline nickel electrodes in different carbonate-bicarbonate ion-containing solutions |
spellingShingle |
The electrochemical behaviour of polycrystalline nickel electrodes in different carbonate-bicarbonate ion-containing solutions Bohé, A. E. Química Ciencias Exactas polycrystalline nickel electrolyte concentration pH |
title_short |
The electrochemical behaviour of polycrystalline nickel electrodes in different carbonate-bicarbonate ion-containing solutions |
title_full |
The electrochemical behaviour of polycrystalline nickel electrodes in different carbonate-bicarbonate ion-containing solutions |
title_fullStr |
The electrochemical behaviour of polycrystalline nickel electrodes in different carbonate-bicarbonate ion-containing solutions |
title_full_unstemmed |
The electrochemical behaviour of polycrystalline nickel electrodes in different carbonate-bicarbonate ion-containing solutions |
title_sort |
The electrochemical behaviour of polycrystalline nickel electrodes in different carbonate-bicarbonate ion-containing solutions |
dc.creator.none.fl_str_mv |
Bohé, A. E. Vilche, Jorge Roberto Arvia, Alejandro Jorge |
author |
Bohé, A. E. |
author_facet |
Bohé, A. E. Vilche, Jorge Roberto Arvia, Alejandro Jorge |
author_role |
author |
author2 |
Vilche, Jorge Roberto Arvia, Alejandro Jorge |
author2_role |
author author |
dc.subject.none.fl_str_mv |
Química Ciencias Exactas polycrystalline nickel electrolyte concentration pH |
topic |
Química Ciencias Exactas polycrystalline nickel electrolyte concentration pH |
dc.description.none.fl_txt_mv |
The dissolution and passivation of polycrystalline nickel in carbonate-bicarbonate ion-containing solutions covering wide ranges of pH and electrolyte concentration were investigated by employing voltammetric, galvanostatic and potentiostatic transient techniques. Results obtained with a rotating disc electrode allow the competing reactions related to the active-passive transition to be distinguished through the influence of the potential sweep rate and the rotation speed on the electrochemical behaviour of the system at fixed concentrations of either carbonate or bicarbonate ion. The first oxidation level of nickel corresponds mainly to Ni(OH)2 formation, the chemical dissolution of the surface layer and the precipitation of NiCO3 and Ni(OH)2. The partial removal of the prepassive layer is predominantly assisted by both the bicarbonate ion concentration and the electrode rotation. In the presence of chloride ions the formation of soluble Ni(II) species and NiCo3 in the potential range of the first oxidation level appears to be enhanced. This effect can be interpreted by taking into account competitive adsorption processes at the base metal between Cl− and OH− ions. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas |
description |
The dissolution and passivation of polycrystalline nickel in carbonate-bicarbonate ion-containing solutions covering wide ranges of pH and electrolyte concentration were investigated by employing voltammetric, galvanostatic and potentiostatic transient techniques. Results obtained with a rotating disc electrode allow the competing reactions related to the active-passive transition to be distinguished through the influence of the potential sweep rate and the rotation speed on the electrochemical behaviour of the system at fixed concentrations of either carbonate or bicarbonate ion. The first oxidation level of nickel corresponds mainly to Ni(OH)2 formation, the chemical dissolution of the surface layer and the precipitation of NiCO3 and Ni(OH)2. The partial removal of the prepassive layer is predominantly assisted by both the bicarbonate ion concentration and the electrode rotation. In the presence of chloride ions the formation of soluble Ni(II) species and NiCo3 in the potential range of the first oxidation level appears to be enhanced. This effect can be interpreted by taking into account competitive adsorption processes at the base metal between Cl− and OH− ions. |
publishDate |
1990 |
dc.date.none.fl_str_mv |
1990 |
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/10915/139854 |
url |
http://sedici.unlp.edu.ar/handle/10915/139854 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/0021-891x info:eu-repo/semantics/altIdentifier/issn/1572-8838 info:eu-repo/semantics/altIdentifier/doi/10.1007/bf01076050 |
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 418-426 |
dc.source.none.fl_str_mv |
reponame:SEDICI (UNLP) instname:Universidad Nacional de La Plata instacron:UNLP |
reponame_str |
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SEDICI (UNLP) |
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Universidad Nacional de La Plata |
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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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12.982451 |