Hydrogen evolution and dissolution on graphite electrodes in molten potassium bisulphate : II. Kinetics and mechanism of the reactions on porous graphite

Autores
Balskus, Eduardo Juan; Triaca, Walter Enrique; Arvia, Alejandro Jorge
Año de publicación
1972
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The electrochemical evolution and dissolution of hydrogen in potassium bisulphate melt have been studied on porous graphite electrodes in the temperature range from 245–280°C. Kinetic parameters were obtained in the conventional way both for steady as well as non-steady conditions and are compared to those previously derived for dense graphite electrodes. The cathodic and anodic reactions are not straightforwardly complementary processes. The former is explained in terms of a conventional reaction mechanism for the hydrogen electrode involving either a hydrogen adatom combination reaction or a hydrogen ion plus adatom reaction as rate-determining. The anodic reaction is interpreted in terms of various possible mechanisms comprising a one-half order rate equation with respect to the hydrogen gas pressure. The most likely mechanism comprises a competition between the ionization of hydrogen adatoms and the oxidation of graphite at active sites located at the surface. Thermal effects are in agreement with the postulated reaction mechanisms.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Ciencias Exactas
Química
Hydrogen
Electrochemical evolution
Kinetic parameters
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:10915/121132
Acceder
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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Hydrogen evolution and dissolution on graphite electrodes in molten potassium bisulphate : II. Kinetics and mechanism of the reactions on porous graphiteBalskus, Eduardo JuanTriaca, Walter EnriqueArvia, Alejandro JorgeCiencias ExactasQuímicaHydrogenElectrochemical evolutionKinetic parametersThe electrochemical evolution and dissolution of hydrogen in potassium bisulphate melt have been studied on porous graphite electrodes in the temperature range from 245–280°C. Kinetic parameters were obtained in the conventional way both for steady as well as non-steady conditions and are compared to those previously derived for dense graphite electrodes. The cathodic and anodic reactions are not straightforwardly complementary processes. The former is explained in terms of a conventional reaction mechanism for the hydrogen electrode involving either a hydrogen adatom combination reaction or a hydrogen ion plus adatom reaction as rate-determining. The anodic reaction is interpreted in terms of various possible mechanisms comprising a one-half order rate equation with respect to the hydrogen gas pressure. The most likely mechanism comprises a competition between the ionization of hydrogen adatoms and the oxidation of graphite at active sites located at the surface. Thermal effects are in agreement with the postulated reaction mechanisms.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1972info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf45-62http://sedici.unlp.edu.ar/handle/10915/121132enginfo:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(72)85006-0info: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:UNLP2025-10-15T11:20:34Zoai:sedici.unlp.edu.ar:10915/121132Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:20:34.925SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Hydrogen evolution and dissolution on graphite electrodes in molten potassium bisulphate : II. Kinetics and mechanism of the reactions on porous graphite
title Hydrogen evolution and dissolution on graphite electrodes in molten potassium bisulphate : II. Kinetics and mechanism of the reactions on porous graphite
spellingShingle Hydrogen evolution and dissolution on graphite electrodes in molten potassium bisulphate : II. Kinetics and mechanism of the reactions on porous graphite
Balskus, Eduardo Juan
Ciencias Exactas
Química
Hydrogen
Electrochemical evolution
Kinetic parameters
title_short Hydrogen evolution and dissolution on graphite electrodes in molten potassium bisulphate : II. Kinetics and mechanism of the reactions on porous graphite
title_full Hydrogen evolution and dissolution on graphite electrodes in molten potassium bisulphate : II. Kinetics and mechanism of the reactions on porous graphite
title_fullStr Hydrogen evolution and dissolution on graphite electrodes in molten potassium bisulphate : II. Kinetics and mechanism of the reactions on porous graphite
title_full_unstemmed Hydrogen evolution and dissolution on graphite electrodes in molten potassium bisulphate : II. Kinetics and mechanism of the reactions on porous graphite
title_sort Hydrogen evolution and dissolution on graphite electrodes in molten potassium bisulphate : II. Kinetics and mechanism of the reactions on porous graphite
dc.creator.none.fl_str_mv Balskus, Eduardo Juan
Triaca, Walter Enrique
Arvia, Alejandro Jorge
author Balskus, Eduardo Juan
author_facet Balskus, Eduardo Juan
Triaca, Walter Enrique
Arvia, Alejandro Jorge
author_role author
author2 Triaca, Walter Enrique
Arvia, Alejandro Jorge
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Hydrogen
Electrochemical evolution
Kinetic parameters
topic Ciencias Exactas
Química
Hydrogen
Electrochemical evolution
Kinetic parameters
dc.description.none.fl_txt_mv The electrochemical evolution and dissolution of hydrogen in potassium bisulphate melt have been studied on porous graphite electrodes in the temperature range from 245–280°C. Kinetic parameters were obtained in the conventional way both for steady as well as non-steady conditions and are compared to those previously derived for dense graphite electrodes. The cathodic and anodic reactions are not straightforwardly complementary processes. The former is explained in terms of a conventional reaction mechanism for the hydrogen electrode involving either a hydrogen adatom combination reaction or a hydrogen ion plus adatom reaction as rate-determining. The anodic reaction is interpreted in terms of various possible mechanisms comprising a one-half order rate equation with respect to the hydrogen gas pressure. The most likely mechanism comprises a competition between the ionization of hydrogen adatoms and the oxidation of graphite at active sites located at the surface. Thermal effects are in agreement with the postulated reaction mechanisms.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description The electrochemical evolution and dissolution of hydrogen in potassium bisulphate melt have been studied on porous graphite electrodes in the temperature range from 245–280°C. Kinetic parameters were obtained in the conventional way both for steady as well as non-steady conditions and are compared to those previously derived for dense graphite electrodes. The cathodic and anodic reactions are not straightforwardly complementary processes. The former is explained in terms of a conventional reaction mechanism for the hydrogen electrode involving either a hydrogen adatom combination reaction or a hydrogen ion plus adatom reaction as rate-determining. The anodic reaction is interpreted in terms of various possible mechanisms comprising a one-half order rate equation with respect to the hydrogen gas pressure. The most likely mechanism comprises a competition between the ionization of hydrogen adatoms and the oxidation of graphite at active sites located at the surface. Thermal effects are in agreement with the postulated reaction mechanisms.
publishDate 1972
dc.date.none.fl_str_mv 1972
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/10915/121132
url http://sedici.unlp.edu.ar/handle/10915/121132
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(72)85006-0
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
45-62
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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