Smooth and rough platinum deposits resulting from the electroreduction of hydrous oxide platinum overlayers : A mechanistic approach

Autores
Bolzán, Agustín Eduardo; Castro Luna Berenguer, Ana María del Carmen; Visintin, Arnaldo; Salvarezza, Roberto Carlos; Arvia, Alejandro Jorge
Año de publicación
1988
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The electroreduction of thick platinum oxides accumulated by the application of a fast square wave perturbing potential in 0.5 M H2SO4 was studied by using potentiodynamic and potentiostatic techniques complemented with scanning electron miscroscopy. The electroreduction process can be unambigously explained through an instantaneous nucleation and 3-D growth of right circular cones under charge transfer control where diffusion of reacting species to the growing centres is essential for further expansion. The growth mode of the Pt crystallites either smooth or rough depends on the electroreduction conditions. The rought/smooth modes of growth result from the influence of the electric field on the transport of particles in the reaction region and on the supersaturation concentration operating during the electrocrystallization process.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Ciencias Exactas
Química
platinum deposits
scanning electron miscroscopy
electroreduction
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/126593
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/126593
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Smooth and rough platinum deposits resulting from the electroreduction of hydrous oxide platinum overlayers : A mechanistic approachBolzán, Agustín EduardoCastro Luna Berenguer, Ana María del CarmenVisintin, ArnaldoSalvarezza, Roberto CarlosArvia, Alejandro JorgeCiencias ExactasQuímicaplatinum depositsscanning electron miscroscopyelectroreductionThe electroreduction of thick platinum oxides accumulated by the application of a fast square wave perturbing potential in 0.5 M H<sub>2</sub>SO<sub>4</sub> was studied by using potentiodynamic and potentiostatic techniques complemented with scanning electron miscroscopy. The electroreduction process can be unambigously explained through an instantaneous nucleation and 3-D growth of right circular cones under charge transfer control where diffusion of reacting species to the growing centres is essential for further expansion. The growth mode of the Pt crystallites either smooth or rough depends on the electroreduction conditions. The rought/smooth modes of growth result from the influence of the electric field on the transport of particles in the reaction region and on the supersaturation concentration operating during the electrocrystallization process.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1988-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1743-1751http://sedici.unlp.edu.ar/handle/10915/126593enginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/0013468688850096info:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(88)85009-6info: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:UNLP2025-09-29T11:30:32Zoai:sedici.unlp.edu.ar:10915/126593Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:30:33.055SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Smooth and rough platinum deposits resulting from the electroreduction of hydrous oxide platinum overlayers : A mechanistic approach
title Smooth and rough platinum deposits resulting from the electroreduction of hydrous oxide platinum overlayers : A mechanistic approach
spellingShingle Smooth and rough platinum deposits resulting from the electroreduction of hydrous oxide platinum overlayers : A mechanistic approach
Bolzán, Agustín Eduardo
Ciencias Exactas
Química
platinum deposits
scanning electron miscroscopy
electroreduction
title_short Smooth and rough platinum deposits resulting from the electroreduction of hydrous oxide platinum overlayers : A mechanistic approach
title_full Smooth and rough platinum deposits resulting from the electroreduction of hydrous oxide platinum overlayers : A mechanistic approach
title_fullStr Smooth and rough platinum deposits resulting from the electroreduction of hydrous oxide platinum overlayers : A mechanistic approach
title_full_unstemmed Smooth and rough platinum deposits resulting from the electroreduction of hydrous oxide platinum overlayers : A mechanistic approach
title_sort Smooth and rough platinum deposits resulting from the electroreduction of hydrous oxide platinum overlayers : A mechanistic approach
dc.creator.none.fl_str_mv Bolzán, Agustín Eduardo
Castro Luna Berenguer, Ana María del Carmen
Visintin, Arnaldo
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author Bolzán, Agustín Eduardo
author_facet Bolzán, Agustín Eduardo
Castro Luna Berenguer, Ana María del Carmen
Visintin, Arnaldo
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_role author
author2 Castro Luna Berenguer, Ana María del Carmen
Visintin, Arnaldo
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
platinum deposits
scanning electron miscroscopy
electroreduction
topic Ciencias Exactas
Química
platinum deposits
scanning electron miscroscopy
electroreduction
dc.description.none.fl_txt_mv The electroreduction of thick platinum oxides accumulated by the application of a fast square wave perturbing potential in 0.5 M H<sub>2</sub>SO<sub>4</sub> was studied by using potentiodynamic and potentiostatic techniques complemented with scanning electron miscroscopy. The electroreduction process can be unambigously explained through an instantaneous nucleation and 3-D growth of right circular cones under charge transfer control where diffusion of reacting species to the growing centres is essential for further expansion. The growth mode of the Pt crystallites either smooth or rough depends on the electroreduction conditions. The rought/smooth modes of growth result from the influence of the electric field on the transport of particles in the reaction region and on the supersaturation concentration operating during the electrocrystallization process.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description The electroreduction of thick platinum oxides accumulated by the application of a fast square wave perturbing potential in 0.5 M H<sub>2</sub>SO<sub>4</sub> was studied by using potentiodynamic and potentiostatic techniques complemented with scanning electron miscroscopy. The electroreduction process can be unambigously explained through an instantaneous nucleation and 3-D growth of right circular cones under charge transfer control where diffusion of reacting species to the growing centres is essential for further expansion. The growth mode of the Pt crystallites either smooth or rough depends on the electroreduction conditions. The rought/smooth modes of growth result from the influence of the electric field on the transport of particles in the reaction region and on the supersaturation concentration operating during the electrocrystallization process.
publishDate 1988
dc.date.none.fl_str_mv 1988-12
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/10915/126593
url http://sedici.unlp.edu.ar/handle/10915/126593
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/0013468688850096
info:eu-repo/semantics/altIdentifier/issn/0013-4686
info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(88)85009-6
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
1743-1751
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 13.070432

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