Complex processes related to the early stages of mercury electrodeposition on Pt electrodes
- Autores
- Salvarezza, Roberto Carlos; Arvia, Alejandro Jorge
- Año de publicación
- 1988
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The underpotential deposition and early stages of bulk mercury electrodeposition on platinum from aqueous solution containing Hg2+2 ions were studied by using combined potentiostatic and potentiodynamic techniques. The simultaneous electroreduction of the O-containing surface species and the underpotential deposition of Hgsup>2+2 ions render an electrode surface containing an O/Hg atom ratio which depends on both the applied potential and Hgsup>2+2 ion concentration in solution. The nucleation and growth of bulk mercury is impeded by the presence of O-containing surface species, whereas it is markedly enhanced by the presence of Hg-adatoms on the electrode surface. A small number of sites are involved in the nucleation process. Apparently defective points at the UPD Hg layer act as preferred sites for nucleation. It takes potentials more negative than the reversible potential of the Hg/Hgsup>2+2 ion electrode and relatively long electrodeposition times to achieve a degree of surface coverage by mercury atoms greater than 1. It is possible to observe that a fraction of them penetrates into bulk platinum to form a skin-type Hg-Pt alloy.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas - Materia
-
Ciencias Exactas
Química
Mercury electrodeposition
Platinum electrodes - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/119241
Ver los metadatos del registro completo
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Complex processes related to the early stages of mercury electrodeposition on Pt electrodesSalvarezza, Roberto CarlosArvia, Alejandro JorgeCiencias ExactasQuímicaMercury electrodepositionPlatinum electrodesThe underpotential deposition and early stages of bulk mercury electrodeposition on platinum from aqueous solution containing Hg<sup>2+</sup><sub>2</sub> ions were studied by using combined potentiostatic and potentiodynamic techniques. The simultaneous electroreduction of the O-containing surface species and the underpotential deposition of Hgsup>2+</sup><sub>2</sub> ions render an electrode surface containing an O/Hg atom ratio which depends on both the applied potential and Hgsup>2+</sup><sub>2</sub> ion concentration in solution. The nucleation and growth of bulk mercury is impeded by the presence of O-containing surface species, whereas it is markedly enhanced by the presence of Hg-adatoms on the electrode surface. A small number of sites are involved in the nucleation process. Apparently defective points at the UPD Hg layer act as preferred sites for nucleation. It takes potentials more negative than the reversible potential of the Hg/Hgsup>2+</sup><sub>2</sub> ion electrode and relatively long electrodeposition times to achieve a degree of surface coverage by mercury atoms greater than 1. It is possible to observe that a fraction of them penetrates into bulk platinum to form a skin-type Hg-Pt alloy.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1988info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1031-1037http://sedici.unlp.edu.ar/handle/10915/119241enginfo:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(88)80191-9info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-sa/4.0/Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T17:09:00Zoai:sedici.unlp.edu.ar:10915/119241Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:09:01.227SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Complex processes related to the early stages of mercury electrodeposition on Pt electrodes |
title |
Complex processes related to the early stages of mercury electrodeposition on Pt electrodes |
spellingShingle |
Complex processes related to the early stages of mercury electrodeposition on Pt electrodes Salvarezza, Roberto Carlos Ciencias Exactas Química Mercury electrodeposition Platinum electrodes |
title_short |
Complex processes related to the early stages of mercury electrodeposition on Pt electrodes |
title_full |
Complex processes related to the early stages of mercury electrodeposition on Pt electrodes |
title_fullStr |
Complex processes related to the early stages of mercury electrodeposition on Pt electrodes |
title_full_unstemmed |
Complex processes related to the early stages of mercury electrodeposition on Pt electrodes |
title_sort |
Complex processes related to the early stages of mercury electrodeposition on Pt electrodes |
dc.creator.none.fl_str_mv |
Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
author |
Salvarezza, Roberto Carlos |
author_facet |
Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
author_role |
author |
author2 |
Arvia, Alejandro Jorge |
author2_role |
author |
dc.subject.none.fl_str_mv |
Ciencias Exactas Química Mercury electrodeposition Platinum electrodes |
topic |
Ciencias Exactas Química Mercury electrodeposition Platinum electrodes |
dc.description.none.fl_txt_mv |
The underpotential deposition and early stages of bulk mercury electrodeposition on platinum from aqueous solution containing Hg<sup>2+</sup><sub>2</sub> ions were studied by using combined potentiostatic and potentiodynamic techniques. The simultaneous electroreduction of the O-containing surface species and the underpotential deposition of Hgsup>2+</sup><sub>2</sub> ions render an electrode surface containing an O/Hg atom ratio which depends on both the applied potential and Hgsup>2+</sup><sub>2</sub> ion concentration in solution. The nucleation and growth of bulk mercury is impeded by the presence of O-containing surface species, whereas it is markedly enhanced by the presence of Hg-adatoms on the electrode surface. A small number of sites are involved in the nucleation process. Apparently defective points at the UPD Hg layer act as preferred sites for nucleation. It takes potentials more negative than the reversible potential of the Hg/Hgsup>2+</sup><sub>2</sub> ion electrode and relatively long electrodeposition times to achieve a degree of surface coverage by mercury atoms greater than 1. It is possible to observe that a fraction of them penetrates into bulk platinum to form a skin-type Hg-Pt alloy. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas |
description |
The underpotential deposition and early stages of bulk mercury electrodeposition on platinum from aqueous solution containing Hg<sup>2+</sup><sub>2</sub> ions were studied by using combined potentiostatic and potentiodynamic techniques. The simultaneous electroreduction of the O-containing surface species and the underpotential deposition of Hgsup>2+</sup><sub>2</sub> ions render an electrode surface containing an O/Hg atom ratio which depends on both the applied potential and Hgsup>2+</sup><sub>2</sub> ion concentration in solution. The nucleation and growth of bulk mercury is impeded by the presence of O-containing surface species, whereas it is markedly enhanced by the presence of Hg-adatoms on the electrode surface. A small number of sites are involved in the nucleation process. Apparently defective points at the UPD Hg layer act as preferred sites for nucleation. It takes potentials more negative than the reversible potential of the Hg/Hgsup>2+</sup><sub>2</sub> ion electrode and relatively long electrodeposition times to achieve a degree of surface coverage by mercury atoms greater than 1. It is possible to observe that a fraction of them penetrates into bulk platinum to form a skin-type Hg-Pt alloy. |
publishDate |
1988 |
dc.date.none.fl_str_mv |
1988 |
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/10915/119241 |
url |
http://sedici.unlp.edu.ar/handle/10915/119241 |
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)80191-9 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-sa/4.0/ Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-sa/4.0/ Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) |
dc.format.none.fl_str_mv |
application/pdf 1031-1037 |
dc.source.none.fl_str_mv |
reponame:SEDICI (UNLP) instname:Universidad Nacional de La Plata instacron:UNLP |
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Universidad Nacional de La Plata |
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UNLP |
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SEDICI (UNLP) - Universidad Nacional de La Plata |
repository.mail.fl_str_mv |
alira@sedici.unlp.edu.ar |
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