The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes

Autores
Martins, María Elisa; Salvarezza, Roberto Carlos; Arvia, Alejandro Jorge
Año de publicación
1998
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The electrodeposition of Hg on polycrystalline smooth and columnar structured Pt (cs-Pt) substrates was comparatively studied in acid solution at 298 K applying potentiodynamic techniques. The topography of both types of Pt electrodes was characterized by scanning tunneling microscopy. The use of cs-Pt substrates provides information about surface processes which are not easily detected on conventional smooth Pt. At moderate and high potential scan rates Hg electrodeposition under mass transport control on cs-Pt yields a non-equilibrium complex deposit consisting of 2d and 3d Hg domains, and Pt-Hg alloy coexisting with bare Pt domains at intercolumnar voids. The dynamics of these domains approaching equilibrium can be followed by conventional voltammetry. The kinetics of Hg penetration into bulk Pt results from a Hg atom shift to a position underlying the first layer of Pt atoms followed by a diffusion-controlled penetration into bulk Pt. The Hg atom diffusion coefficient into bulk Pt results in D≅2×10−17 cm2 s−1
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Ciencias Exactas
Química
Mercury electrodeposition
Mercury underpotential electrodeposition
Platinum electrode topography
Mercury penetration into platinum
Columnar-structured electrode
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:10915/118202
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/118202
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodesMartins, María ElisaSalvarezza, Roberto CarlosArvia, Alejandro JorgeCiencias ExactasQuímicaMercury electrodepositionMercury underpotential electrodepositionPlatinum electrode topographyMercury penetration into platinumColumnar-structured electrodeThe electrodeposition of Hg on polycrystalline smooth and columnar structured Pt (cs-Pt) substrates was comparatively studied in acid solution at 298 K applying potentiodynamic techniques. The topography of both types of Pt electrodes was characterized by scanning tunneling microscopy. The use of cs-Pt substrates provides information about surface processes which are not easily detected on conventional smooth Pt. At moderate and high potential scan rates Hg electrodeposition under mass transport control on cs-Pt yields a non-equilibrium complex deposit consisting of 2d and 3d Hg domains, and Pt-Hg alloy coexisting with bare Pt domains at intercolumnar voids. The dynamics of these domains approaching equilibrium can be followed by conventional voltammetry. The kinetics of Hg penetration into bulk Pt results from a Hg atom shift to a position underlying the first layer of Pt atoms followed by a diffusion-controlled penetration into bulk Pt. The Hg atom diffusion coefficient into bulk Pt results in D≅2×10<sup>−17</sup> cm<sup>2</sup> s<sup>−1</sup>Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1998info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf549-561http://sedici.unlp.edu.ar/handle/10915/118202enginfo:eu-repo/semantics/altIdentifier/issn/0013–4686info: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:UNLP2025-09-17T10:10:30Zoai:sedici.unlp.edu.ar:10915/118202Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-17 10:10:30.607SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
title The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
spellingShingle The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
Martins, María Elisa
Ciencias Exactas
Química
Mercury electrodeposition
Mercury underpotential electrodeposition
Platinum electrode topography
Mercury penetration into platinum
Columnar-structured electrode
title_short The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
title_full The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
title_fullStr The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
title_full_unstemmed The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
title_sort The electrodeposition of mercury from aqueous Hg<sup>2+</sup><sub>2</sub> ion-containing acid solutions on smooth and columnar-structured platinum electrodes
dc.creator.none.fl_str_mv Martins, María Elisa
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author Martins, María Elisa
author_facet Martins, María Elisa
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
Mercury electrodeposition
Mercury underpotential electrodeposition
Platinum electrode topography
Mercury penetration into platinum
Columnar-structured electrode
topic Ciencias Exactas
Química
Mercury electrodeposition
Mercury underpotential electrodeposition
Platinum electrode topography
Mercury penetration into platinum
Columnar-structured electrode
dc.description.none.fl_txt_mv The electrodeposition of Hg on polycrystalline smooth and columnar structured Pt (cs-Pt) substrates was comparatively studied in acid solution at 298 K applying potentiodynamic techniques. The topography of both types of Pt electrodes was characterized by scanning tunneling microscopy. The use of cs-Pt substrates provides information about surface processes which are not easily detected on conventional smooth Pt. At moderate and high potential scan rates Hg electrodeposition under mass transport control on cs-Pt yields a non-equilibrium complex deposit consisting of 2d and 3d Hg domains, and Pt-Hg alloy coexisting with bare Pt domains at intercolumnar voids. The dynamics of these domains approaching equilibrium can be followed by conventional voltammetry. The kinetics of Hg penetration into bulk Pt results from a Hg atom shift to a position underlying the first layer of Pt atoms followed by a diffusion-controlled penetration into bulk Pt. The Hg atom diffusion coefficient into bulk Pt results in D≅2×10<sup>−17</sup> cm<sup>2</sup> s<sup>−1</sup>
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description The electrodeposition of Hg on polycrystalline smooth and columnar structured Pt (cs-Pt) substrates was comparatively studied in acid solution at 298 K applying potentiodynamic techniques. The topography of both types of Pt electrodes was characterized by scanning tunneling microscopy. The use of cs-Pt substrates provides information about surface processes which are not easily detected on conventional smooth Pt. At moderate and high potential scan rates Hg electrodeposition under mass transport control on cs-Pt yields a non-equilibrium complex deposit consisting of 2d and 3d Hg domains, and Pt-Hg alloy coexisting with bare Pt domains at intercolumnar voids. The dynamics of these domains approaching equilibrium can be followed by conventional voltammetry. The kinetics of Hg penetration into bulk Pt results from a Hg atom shift to a position underlying the first layer of Pt atoms followed by a diffusion-controlled penetration into bulk Pt. The Hg atom diffusion coefficient into bulk Pt results in D≅2×10<sup>−17</sup> cm<sup>2</sup> s<sup>−1</sup>
publishDate 1998
dc.date.none.fl_str_mv 1998
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/10915/118202
url http://sedici.unlp.edu.ar/handle/10915/118202
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0013–4686
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
549-561
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 13.001348

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