Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes

The oxygen electroreduction reaction (OERR) kinetics at (111)- and (100)-type Pt electrodes has been studied in aqueous 1.0 M H<sub>2</sub>SO<sub>4</sub> solutions in the 8–62°C range. On both Pt electrodes and at all temperatures, two Tafel regions have been observed. The Ta...

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Detalles Bibliográficos
Autores: Zinola Sánchez, Carlos Fernando, Castro Luna Berenguer, Ana María del Carmen, Arvia, Alejandro Jorge
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:1994
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/127474
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127474
Access Level:acceso abierto
Palabra clave:Ciencias Exactas
Química
oxygen
electroreduction
platinum
temperature
kinetics parameters
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spelling Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodesZinola Sánchez, Carlos FernandoCastro Luna Berenguer, Ana María del CarmenArvia, Alejandro JorgeCiencias ExactasQuímicaoxygenelectroreductionplatinumtemperaturekinetics parametersThe oxygen electroreduction reaction (OERR) kinetics at (111)- and (100)-type Pt electrodes has been studied in aqueous 1.0 M H<sub>2</sub>SO<sub>4</sub> solutions in the 8–62°C range. On both Pt electrodes and at all temperatures, two Tafel regions have been observed. The Tafel slope in the low current density range is −0.053 ± 0.005 V decade<sup>−1</sup>, irrespective of temperature and the surface texture of the electrode. For (111)-type Pt, the Tafel slope in the high current density range increases with temperature, approaching the −2.303(2RT/F) ratio, whereas for (100)-type Pt, it reaches a temperature-independent value equal to −0.165 ± 0.003 V decade<sup>−1</sup>. Temperature dependences of OERR Tafel slopes on both types of Pt electrodes offer the possibility of further insights into the mechanism of the reaction, through the interpretation of both the adsorption enthalpy and entropy of intermediates produced along the OERR. Compensation effects, involving activation enthalpy and entropy variations with the applied potential, are also considered to account for experimental data.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1994info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1951-1959http://sedici.unlp.edu.ar/handle/10915/127474enginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/0013468694850739info:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(94)85073-9info: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:UNLP2024-05-08T13:09:21Zoai:sedici.unlp.edu.ar:10915/127474Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 13:09:22.066SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
title Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
spellingShingle Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
Zinola Sánchez, Carlos Fernando
Ciencias Exactas
Química
oxygen
electroreduction
platinum
temperature
kinetics parameters
title_short Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
title_full Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
title_fullStr Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
title_full_unstemmed Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
title_sort Temperature dependence of kinetic parameters related to oxygen electroreduction in acid solutions on platinum electrodes
dc.creator.none.fl_str_mv Zinola Sánchez, Carlos Fernando
Castro Luna Berenguer, Ana María del Carmen
Arvia, Alejandro Jorge
author Zinola Sánchez, Carlos Fernando
author_facet Zinola Sánchez, Carlos Fernando
Castro Luna Berenguer, Ana María del Carmen
Arvia, Alejandro Jorge
author_role author
author2 Castro Luna Berenguer, Ana María del Carmen
Arvia, Alejandro Jorge
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
oxygen
electroreduction
platinum
temperature
kinetics parameters
topic Ciencias Exactas
Química
oxygen
electroreduction
platinum
temperature
kinetics parameters
description The oxygen electroreduction reaction (OERR) kinetics at (111)- and (100)-type Pt electrodes has been studied in aqueous 1.0 M H<sub>2</sub>SO<sub>4</sub> solutions in the 8–62°C range. On both Pt electrodes and at all temperatures, two Tafel regions have been observed. The Tafel slope in the low current density range is −0.053 ± 0.005 V decade<sup>−1</sup>, irrespective of temperature and the surface texture of the electrode. For (111)-type Pt, the Tafel slope in the high current density range increases with temperature, approaching the −2.303(2RT/F) ratio, whereas for (100)-type Pt, it reaches a temperature-independent value equal to −0.165 ± 0.003 V decade<sup>−1</sup>. Temperature dependences of OERR Tafel slopes on both types of Pt electrodes offer the possibility of further insights into the mechanism of the reaction, through the interpretation of both the adsorption enthalpy and entropy of intermediates produced along the OERR. Compensation effects, involving activation enthalpy and entropy variations with the applied potential, are also considered to account for experimental data.
publishDate 1994
dc.date.none.fl_str_mv 1994
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/10915/127474
url http://sedici.unlp.edu.ar/handle/10915/127474
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/0013468694850739
info:eu-repo/semantics/altIdentifier/issn/0013-4686
info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(94)85073-9
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
1951-1959
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (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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