Influence of the Nanostructure of Palladium Mesoparticles on the Kinetics of Molecular Oxygen Electroreduction

Autores
Hernández Creus, A.; Gimeno, Y.; Díaz, P.; Vázquez, L.; González, S.; Salvarezza, Roberto Carlos; Arvia, Alejandro Jorge
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The effect of the nanostructure of electrodeposited palladium mesoparticles on the oxygen electroreduction reaction (oerr) in acid media is studied by electrochemical techniques combined with scanning tunneling microscopy, tapping-mode atomic force microscopy, and scanning electron microscopy. Palladium mesoparticles supported on highly oriented pyrolytic graphite (HOPG) exhibit a remarkable electrocatalytic enhancement, i.e., a decrease in the cathodic overvoltage on the order of 0.25 V, as compared to polycrystalline palladium electrodes. For a similar particle size, the largest electrocatalytic activity is obtained by use of quasi-twodimensional (2D) ramified palladium particles and electrodeposited palladium charges exceeding 3 mC cm-2. For these particles, experimental results show that the electrocatalytic enhancement of the oerr can be related to the combined influence of the nanostructure of 2D branching on the HOPG and traces of oxygen-containing adsorbates that induces local perturbation of electronic states at palladium mesoparticles. The 2D nature of surfaces increases markedly the reversibility of the first two-electron-transfer step of the oerr.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Ciencias Exactas
Química
Palladium Mesoparticles
Electroreduction
Highly oriented pyrolytic graphite
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:10915/121357
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/121357
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Influence of the Nanostructure of Palladium Mesoparticles on the Kinetics of Molecular Oxygen ElectroreductionHernández Creus, A.Gimeno, Y.Díaz, P.Vázquez, L.González, S.Salvarezza, Roberto CarlosArvia, Alejandro JorgeCiencias ExactasQuímicaPalladium MesoparticlesElectroreductionHighly oriented pyrolytic graphiteThe effect of the nanostructure of electrodeposited palladium mesoparticles on the oxygen electroreduction reaction (oerr) in acid media is studied by electrochemical techniques combined with scanning tunneling microscopy, tapping-mode atomic force microscopy, and scanning electron microscopy. Palladium mesoparticles supported on highly oriented pyrolytic graphite (HOPG) exhibit a remarkable electrocatalytic enhancement, i.e., a decrease in the cathodic overvoltage on the order of 0.25 V, as compared to polycrystalline palladium electrodes. For a similar particle size, the largest electrocatalytic activity is obtained by use of quasi-twodimensional (2D) ramified palladium particles and electrodeposited palladium charges exceeding 3 mC cm<sup>-2</sup>. For these particles, experimental results show that the electrocatalytic enhancement of the oerr can be related to the combined influence of the nanostructure of 2D branching on the HOPG and traces of oxygen-containing adsorbates that induces local perturbation of electronic states at palladium mesoparticles. The 2D nature of surfaces increases markedly the reversibility of the first two-electron-transfer step of the oerr.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas2004info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf10785-10795http://sedici.unlp.edu.ar/handle/10915/121357enginfo:eu-repo/semantics/altIdentifier/issn/1520-6106info:eu-repo/semantics/altIdentifier/issn/1520-5207info:eu-repo/semantics/altIdentifier/doi/10.1021/jp0375214info: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:UNLP2025-10-22T17:09:40Zoai:sedici.unlp.edu.ar:10915/121357Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:09:40.741SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Influence of the Nanostructure of Palladium Mesoparticles on the Kinetics of Molecular Oxygen Electroreduction
title Influence of the Nanostructure of Palladium Mesoparticles on the Kinetics of Molecular Oxygen Electroreduction
spellingShingle Influence of the Nanostructure of Palladium Mesoparticles on the Kinetics of Molecular Oxygen Electroreduction
Hernández Creus, A.
Ciencias Exactas
Química
Palladium Mesoparticles
Electroreduction
Highly oriented pyrolytic graphite
title_short Influence of the Nanostructure of Palladium Mesoparticles on the Kinetics of Molecular Oxygen Electroreduction
title_full Influence of the Nanostructure of Palladium Mesoparticles on the Kinetics of Molecular Oxygen Electroreduction
title_fullStr Influence of the Nanostructure of Palladium Mesoparticles on the Kinetics of Molecular Oxygen Electroreduction
title_full_unstemmed Influence of the Nanostructure of Palladium Mesoparticles on the Kinetics of Molecular Oxygen Electroreduction
title_sort Influence of the Nanostructure of Palladium Mesoparticles on the Kinetics of Molecular Oxygen Electroreduction
dc.creator.none.fl_str_mv Hernández Creus, A.
Gimeno, Y.
Díaz, P.
Vázquez, L.
González, S.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author Hernández Creus, A.
author_facet Hernández Creus, A.
Gimeno, Y.
Díaz, P.
Vázquez, L.
González, S.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_role author
author2 Gimeno, Y.
Díaz, P.
Vázquez, L.
González, S.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Palladium Mesoparticles
Electroreduction
Highly oriented pyrolytic graphite
topic Ciencias Exactas
Química
Palladium Mesoparticles
Electroreduction
Highly oriented pyrolytic graphite
dc.description.none.fl_txt_mv The effect of the nanostructure of electrodeposited palladium mesoparticles on the oxygen electroreduction reaction (oerr) in acid media is studied by electrochemical techniques combined with scanning tunneling microscopy, tapping-mode atomic force microscopy, and scanning electron microscopy. Palladium mesoparticles supported on highly oriented pyrolytic graphite (HOPG) exhibit a remarkable electrocatalytic enhancement, i.e., a decrease in the cathodic overvoltage on the order of 0.25 V, as compared to polycrystalline palladium electrodes. For a similar particle size, the largest electrocatalytic activity is obtained by use of quasi-twodimensional (2D) ramified palladium particles and electrodeposited palladium charges exceeding 3 mC cm<sup>-2</sup>. For these particles, experimental results show that the electrocatalytic enhancement of the oerr can be related to the combined influence of the nanostructure of 2D branching on the HOPG and traces of oxygen-containing adsorbates that induces local perturbation of electronic states at palladium mesoparticles. The 2D nature of surfaces increases markedly the reversibility of the first two-electron-transfer step of the oerr.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description The effect of the nanostructure of electrodeposited palladium mesoparticles on the oxygen electroreduction reaction (oerr) in acid media is studied by electrochemical techniques combined with scanning tunneling microscopy, tapping-mode atomic force microscopy, and scanning electron microscopy. Palladium mesoparticles supported on highly oriented pyrolytic graphite (HOPG) exhibit a remarkable electrocatalytic enhancement, i.e., a decrease in the cathodic overvoltage on the order of 0.25 V, as compared to polycrystalline palladium electrodes. For a similar particle size, the largest electrocatalytic activity is obtained by use of quasi-twodimensional (2D) ramified palladium particles and electrodeposited palladium charges exceeding 3 mC cm<sup>-2</sup>. For these particles, experimental results show that the electrocatalytic enhancement of the oerr can be related to the combined influence of the nanostructure of 2D branching on the HOPG and traces of oxygen-containing adsorbates that induces local perturbation of electronic states at palladium mesoparticles. The 2D nature of surfaces increases markedly the reversibility of the first two-electron-transfer step of the oerr.
publishDate 2004
dc.date.none.fl_str_mv 2004
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/10915/121357
url http://sedici.unlp.edu.ar/handle/10915/121357
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1520-6106
info:eu-repo/semantics/altIdentifier/issn/1520-5207
info:eu-repo/semantics/altIdentifier/doi/10.1021/jp0375214
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
10785-10795
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 12.982451

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