Ionic mass transfer in flowing solutions : Electrochemical reactions under ionic mass-transfer rate control on cylindrical electrodes

Autores
Bazán, Julio César; Arvia, Alejandro Jorge
Año de publicación
1964
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Several electrochemical reactions under ionic mass-transfer rate-control have been studied on cylindrical electrodes forming part of electrolysis cell. The electrodeposition of copper and the redox reactions for the ferro-ferricyanide systems have been examined, in each case with a large excess of a suitable inert electrolyte. The influences of concentration of the reacting species, rate of flowing, viscosity and diffusivity, height of the working electrode, temperature, and distance between anode and cathode, were studied under streamline-flow conditions. The data are fitted by the dimensionless equation Sh = 0·525 . eRd1/2 . Sc1/3 . (hd)3/4. The temperature dependence of the kinetic constant yielded the following experimental heats of activation (a) for copper ion deposition 4800 ± 200 cal/mole (b) for ferricyanide reduction, 3400 ± 200 cal/mole (c) for ferrocyanide oxidation, 3700 ± 200 cal/mole. Since the kinetic constant increases when the flow rate is increased and also when the electrode height is decreased, a departure from reversibility has been observed for the redox system reaction when suitable experimental conditions are chosen.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Ciencias Exactas
Química
Ionic mass transfer
Electrochemical reactions
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:10915/121414

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oai_identifier_str oai:sedici.unlp.edu.ar:10915/121414
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Ionic mass transfer in flowing solutions : Electrochemical reactions under ionic mass-transfer rate control on cylindrical electrodesBazán, Julio CésarArvia, Alejandro JorgeCiencias ExactasQuímicaIonic mass transferElectrochemical reactionsSeveral electrochemical reactions under ionic mass-transfer rate-control have been studied on cylindrical electrodes forming part of electrolysis cell. The electrodeposition of copper and the redox reactions for the ferro-ferricyanide systems have been examined, in each case with a large excess of a suitable inert electrolyte. The influences of concentration of the reacting species, rate of flowing, viscosity and diffusivity, height of the working electrode, temperature, and distance between anode and cathode, were studied under streamline-flow conditions. The data are fitted by the dimensionless equation Sh = 0·525 . eR<sub>d</sub><sup>1/2</sup> . Sc<sup>1/3</sup> . (hd)<sup>3/4</sup>. The temperature dependence of the kinetic constant yielded the following experimental heats of activation (a) for copper ion deposition 4800 ± 200 cal/mole (b) for ferricyanide reduction, 3400 ± 200 cal/mole (c) for ferrocyanide oxidation, 3700 ± 200 cal/mole. Since the kinetic constant increases when the flow rate is increased and also when the electrode height is decreased, a departure from reversibility has been observed for the redox system reaction when suitable experimental conditions are chosen.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1964info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf667-684http://sedici.unlp.edu.ar/handle/10915/121414enginfo:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(64)80039-6info: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:UNLP2025-09-29T11:28:49Zoai:sedici.unlp.edu.ar:10915/121414Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:28:49.576SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Ionic mass transfer in flowing solutions : Electrochemical reactions under ionic mass-transfer rate control on cylindrical electrodes
title Ionic mass transfer in flowing solutions : Electrochemical reactions under ionic mass-transfer rate control on cylindrical electrodes
spellingShingle Ionic mass transfer in flowing solutions : Electrochemical reactions under ionic mass-transfer rate control on cylindrical electrodes
Bazán, Julio César
Ciencias Exactas
Química
Ionic mass transfer
Electrochemical reactions
title_short Ionic mass transfer in flowing solutions : Electrochemical reactions under ionic mass-transfer rate control on cylindrical electrodes
title_full Ionic mass transfer in flowing solutions : Electrochemical reactions under ionic mass-transfer rate control on cylindrical electrodes
title_fullStr Ionic mass transfer in flowing solutions : Electrochemical reactions under ionic mass-transfer rate control on cylindrical electrodes
title_full_unstemmed Ionic mass transfer in flowing solutions : Electrochemical reactions under ionic mass-transfer rate control on cylindrical electrodes
title_sort Ionic mass transfer in flowing solutions : Electrochemical reactions under ionic mass-transfer rate control on cylindrical electrodes
dc.creator.none.fl_str_mv Bazán, Julio César
Arvia, Alejandro Jorge
author Bazán, Julio César
author_facet Bazán, Julio César
Arvia, Alejandro Jorge
author_role author
author2 Arvia, Alejandro Jorge
author2_role author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Ionic mass transfer
Electrochemical reactions
topic Ciencias Exactas
Química
Ionic mass transfer
Electrochemical reactions
dc.description.none.fl_txt_mv Several electrochemical reactions under ionic mass-transfer rate-control have been studied on cylindrical electrodes forming part of electrolysis cell. The electrodeposition of copper and the redox reactions for the ferro-ferricyanide systems have been examined, in each case with a large excess of a suitable inert electrolyte. The influences of concentration of the reacting species, rate of flowing, viscosity and diffusivity, height of the working electrode, temperature, and distance between anode and cathode, were studied under streamline-flow conditions. The data are fitted by the dimensionless equation Sh = 0·525 . eR<sub>d</sub><sup>1/2</sup> . Sc<sup>1/3</sup> . (hd)<sup>3/4</sup>. The temperature dependence of the kinetic constant yielded the following experimental heats of activation (a) for copper ion deposition 4800 ± 200 cal/mole (b) for ferricyanide reduction, 3400 ± 200 cal/mole (c) for ferrocyanide oxidation, 3700 ± 200 cal/mole. Since the kinetic constant increases when the flow rate is increased and also when the electrode height is decreased, a departure from reversibility has been observed for the redox system reaction when suitable experimental conditions are chosen.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description Several electrochemical reactions under ionic mass-transfer rate-control have been studied on cylindrical electrodes forming part of electrolysis cell. The electrodeposition of copper and the redox reactions for the ferro-ferricyanide systems have been examined, in each case with a large excess of a suitable inert electrolyte. The influences of concentration of the reacting species, rate of flowing, viscosity and diffusivity, height of the working electrode, temperature, and distance between anode and cathode, were studied under streamline-flow conditions. The data are fitted by the dimensionless equation Sh = 0·525 . eR<sub>d</sub><sup>1/2</sup> . Sc<sup>1/3</sup> . (hd)<sup>3/4</sup>. The temperature dependence of the kinetic constant yielded the following experimental heats of activation (a) for copper ion deposition 4800 ± 200 cal/mole (b) for ferricyanide reduction, 3400 ± 200 cal/mole (c) for ferrocyanide oxidation, 3700 ± 200 cal/mole. Since the kinetic constant increases when the flow rate is increased and also when the electrode height is decreased, a departure from reversibility has been observed for the redox system reaction when suitable experimental conditions are chosen.
publishDate 1964
dc.date.none.fl_str_mv 1964
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/10915/121414
url http://sedici.unlp.edu.ar/handle/10915/121414
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(64)80039-6
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
667-684
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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