Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation

Autores
Zinola Sánchez, Carlos Fernando; Castro Luna Berenguer, Ana María del Carmen; Triaca, Walter Enrique; Arvia, Alejandro Jorge
Año de publicación
1994
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The oxygen electroreduction reaction has been studied at both preferred oriented and conventional polycrystalline platinum rotating disc electrodes in x m KOH (0.05 ⩽ x ⩽ 3.0) aqueous solutions under oxygen saturation at 25°C. At low current densities, Tafel lines with slope -0.060 V decade⁻¹ have been obtained at all platinum electrodes. At high current densities, higher Tafel slopes ranging from -0.18 to -0.40 V decade⁻¹ have been observed, depending on the type of preferred oriented Pt and KOH concentration. Rotating ring-disc electrode data have shown that a higher amount of H₂O₂ is produced on one type of preferred oriented surface at all KOH concentrations. A complex reaction scheme has been used to evaluate the electrochemical rate constants of the reaction steps at three platinum electrodes.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Química
Platinum Electrode
Oriented Surface
Rotate Disc Electrode
Prefer Crystallographic Orientation
Oxygen Electroreduction
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:10915/146265

id SEDICI_844bcc263697fcb0b612bdcda817555d
oai_identifier_str oai:sedici.unlp.edu.ar:10915/146265
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientationZinola Sánchez, Carlos FernandoCastro Luna Berenguer, Ana María del CarmenTriaca, Walter EnriqueArvia, Alejandro JorgeQuímicaPlatinum ElectrodeOriented SurfaceRotate Disc ElectrodePrefer Crystallographic OrientationOxygen ElectroreductionThe oxygen electroreduction reaction has been studied at both preferred oriented and conventional polycrystalline platinum rotating disc electrodes in x m KOH (0.05 ⩽ x ⩽ 3.0) aqueous solutions under oxygen saturation at 25°C. At low current densities, Tafel lines with slope -0.060 V decade⁻¹ have been obtained at all platinum electrodes. At high current densities, higher Tafel slopes ranging from -0.18 to -0.40 V decade⁻¹ have been observed, depending on the type of preferred oriented Pt and KOH concentration. Rotating ring-disc electrode data have shown that a higher amount of H₂O₂ is produced on one type of preferred oriented surface at all KOH concentrations. A complex reaction scheme has been used to evaluate the electrochemical rate constants of the reaction steps at three platinum electrodes.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/pdf531-541http://sedici.unlp.edu.ar/handle/10915/146265enginfo:eu-repo/semantics/altIdentifier/issn/0021-891Xinfo:eu-repo/semantics/altIdentifier/issn/1572-8838info:eu-repo/semantics/altIdentifier/doi/10.1007/bf00249854info: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:UNLP2025-09-29T11:32:32Zoai:sedici.unlp.edu.ar:10915/146265Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:32:33.176SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
title Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
spellingShingle Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
Zinola Sánchez, Carlos Fernando
Química
Platinum Electrode
Oriented Surface
Rotate Disc Electrode
Prefer Crystallographic Orientation
Oxygen Electroreduction
title_short Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
title_full Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
title_fullStr Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
title_full_unstemmed Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
title_sort Kinetics and mechanism of the electrochemical reduction of molecular oxygen on platinum in KOH: influence of preferred crystallographic orientation
dc.creator.none.fl_str_mv Zinola Sánchez, Carlos Fernando
Castro Luna Berenguer, Ana María del Carmen
Triaca, Walter Enrique
Arvia, Alejandro Jorge
author Zinola Sánchez, Carlos Fernando
author_facet Zinola Sánchez, Carlos Fernando
Castro Luna Berenguer, Ana María del Carmen
Triaca, Walter Enrique
Arvia, Alejandro Jorge
author_role author
author2 Castro Luna Berenguer, Ana María del Carmen
Triaca, Walter Enrique
Arvia, Alejandro Jorge
author2_role author
author
author
dc.subject.none.fl_str_mv Química
Platinum Electrode
Oriented Surface
Rotate Disc Electrode
Prefer Crystallographic Orientation
Oxygen Electroreduction
topic Química
Platinum Electrode
Oriented Surface
Rotate Disc Electrode
Prefer Crystallographic Orientation
Oxygen Electroreduction
dc.description.none.fl_txt_mv The oxygen electroreduction reaction has been studied at both preferred oriented and conventional polycrystalline platinum rotating disc electrodes in x m KOH (0.05 ⩽ x ⩽ 3.0) aqueous solutions under oxygen saturation at 25°C. At low current densities, Tafel lines with slope -0.060 V decade⁻¹ have been obtained at all platinum electrodes. At high current densities, higher Tafel slopes ranging from -0.18 to -0.40 V decade⁻¹ have been observed, depending on the type of preferred oriented Pt and KOH concentration. Rotating ring-disc electrode data have shown that a higher amount of H₂O₂ is produced on one type of preferred oriented surface at all KOH concentrations. A complex reaction scheme has been used to evaluate the electrochemical rate constants of the reaction steps at three platinum electrodes.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description The oxygen electroreduction reaction has been studied at both preferred oriented and conventional polycrystalline platinum rotating disc electrodes in x m KOH (0.05 ⩽ x ⩽ 3.0) aqueous solutions under oxygen saturation at 25°C. At low current densities, Tafel lines with slope -0.060 V decade⁻¹ have been obtained at all platinum electrodes. At high current densities, higher Tafel slopes ranging from -0.18 to -0.40 V decade⁻¹ have been observed, depending on the type of preferred oriented Pt and KOH concentration. Rotating ring-disc electrode data have shown that a higher amount of H₂O₂ is produced on one type of preferred oriented surface at all KOH concentrations. A complex reaction scheme has been used to evaluate the electrochemical rate constants of the reaction steps at three platinum electrodes.
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/10915/146265
url http://sedici.unlp.edu.ar/handle/10915/146265
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0021-891X
info:eu-repo/semantics/altIdentifier/issn/1572-8838
info:eu-repo/semantics/altIdentifier/doi/10.1007/bf00249854
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
531-541
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
_version_ 1844616205161201664
score 13.070432