Glycerol electrooxidation on platinum-tin electrodeposited films: inducing changes in surface composition by cyclic voltammetry

Autores
Mello, Gisele A. B.; Fernández, Pablo S.; Martins, María Elisa; Camara, Giuseppe A.
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this work, PtSn binary electrodeposits were prepared in three compositions and submitted to successive voltammetric cycles in presence of glycerol (1.0 mol L−1) in acidic media. Catalysts were characterized by energy dispersive X-ray analysis and X-ray photoelectron spectroscopy before and after the cycles being performed, in order to check eventual changes in their compositions during the process. Spectroscopic results show that surface compositions are sensibly richer in Sn than their bulk counterparts. Overall, PtSn catalysts show a poor initial catalytic activity toward glycerol electrooxidation. However, as the cycles succeed, the voltammetric responses increasingly resemble that of Pt, while the oxidation currents increase. Results are rationalized in terms of a continuous enrichment of the surface by Pt at the expenses of a loss of Sn. Moreover, when the electrochemical surface area (ECSA) is estimated by stripping of CO, it becomes evident that electrooxidation currents remain growing, even when the ECSA is decreased, which makes the gain in catalytic activity particularly relevant. Ultimately, from a broader perspective, our results suggest that catalytic surfaces with tunable features (such as surface composition and catalytic response) can be obtained by the application of easily executable electrochemical protocols.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Química
Glycerol electrooxidation
Platinum-tin
Electrodeposits
Tunable composition
Surface composition change
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:10915/104788

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network_name_str SEDICI (UNLP)
spelling Glycerol electrooxidation on platinum-tin electrodeposited films: inducing changes in surface composition by cyclic voltammetryMello, Gisele A. B.Fernández, Pablo S.Martins, María ElisaCamara, Giuseppe A.QuímicaGlycerol electrooxidationPlatinum-tinElectrodepositsTunable compositionSurface composition changeIn this work, PtSn binary electrodeposits were prepared in three compositions and submitted to successive voltammetric cycles in presence of glycerol (1.0 mol L−1) in acidic media. Catalysts were characterized by energy dispersive X-ray analysis and X-ray photoelectron spectroscopy before and after the cycles being performed, in order to check eventual changes in their compositions during the process. Spectroscopic results show that surface compositions are sensibly richer in Sn than their bulk counterparts. Overall, PtSn catalysts show a poor initial catalytic activity toward glycerol electrooxidation. However, as the cycles succeed, the voltammetric responses increasingly resemble that of Pt, while the oxidation currents increase. Results are rationalized in terms of a continuous enrichment of the surface by Pt at the expenses of a loss of Sn. Moreover, when the electrochemical surface area (ECSA) is estimated by stripping of CO, it becomes evident that electrooxidation currents remain growing, even when the ECSA is decreased, which makes the gain in catalytic activity particularly relevant. Ultimately, from a broader perspective, our results suggest that catalytic surfaces with tunable features (such as surface composition and catalytic response) can be obtained by the application of easily executable electrochemical protocols.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1-10http://sedici.unlp.edu.ar/handle/10915/104788enginfo:eu-repo/semantics/altIdentifier/issn/1868-5994info:eu-repo/semantics/altIdentifier/doi/10.1007/s12678-016-0332-zinfo: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:UNLP2025-09-29T11:22:57Zoai:sedici.unlp.edu.ar:10915/104788Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:22:57.982SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Glycerol electrooxidation on platinum-tin electrodeposited films: inducing changes in surface composition by cyclic voltammetry
title Glycerol electrooxidation on platinum-tin electrodeposited films: inducing changes in surface composition by cyclic voltammetry
spellingShingle Glycerol electrooxidation on platinum-tin electrodeposited films: inducing changes in surface composition by cyclic voltammetry
Mello, Gisele A. B.
Química
Glycerol electrooxidation
Platinum-tin
Electrodeposits
Tunable composition
Surface composition change
title_short Glycerol electrooxidation on platinum-tin electrodeposited films: inducing changes in surface composition by cyclic voltammetry
title_full Glycerol electrooxidation on platinum-tin electrodeposited films: inducing changes in surface composition by cyclic voltammetry
title_fullStr Glycerol electrooxidation on platinum-tin electrodeposited films: inducing changes in surface composition by cyclic voltammetry
title_full_unstemmed Glycerol electrooxidation on platinum-tin electrodeposited films: inducing changes in surface composition by cyclic voltammetry
title_sort Glycerol electrooxidation on platinum-tin electrodeposited films: inducing changes in surface composition by cyclic voltammetry
dc.creator.none.fl_str_mv Mello, Gisele A. B.
Fernández, Pablo S.
Martins, María Elisa
Camara, Giuseppe A.
author Mello, Gisele A. B.
author_facet Mello, Gisele A. B.
Fernández, Pablo S.
Martins, María Elisa
Camara, Giuseppe A.
author_role author
author2 Fernández, Pablo S.
Martins, María Elisa
Camara, Giuseppe A.
author2_role author
author
author
dc.subject.none.fl_str_mv Química
Glycerol electrooxidation
Platinum-tin
Electrodeposits
Tunable composition
Surface composition change
topic Química
Glycerol electrooxidation
Platinum-tin
Electrodeposits
Tunable composition
Surface composition change
dc.description.none.fl_txt_mv In this work, PtSn binary electrodeposits were prepared in three compositions and submitted to successive voltammetric cycles in presence of glycerol (1.0 mol L−1) in acidic media. Catalysts were characterized by energy dispersive X-ray analysis and X-ray photoelectron spectroscopy before and after the cycles being performed, in order to check eventual changes in their compositions during the process. Spectroscopic results show that surface compositions are sensibly richer in Sn than their bulk counterparts. Overall, PtSn catalysts show a poor initial catalytic activity toward glycerol electrooxidation. However, as the cycles succeed, the voltammetric responses increasingly resemble that of Pt, while the oxidation currents increase. Results are rationalized in terms of a continuous enrichment of the surface by Pt at the expenses of a loss of Sn. Moreover, when the electrochemical surface area (ECSA) is estimated by stripping of CO, it becomes evident that electrooxidation currents remain growing, even when the ECSA is decreased, which makes the gain in catalytic activity particularly relevant. Ultimately, from a broader perspective, our results suggest that catalytic surfaces with tunable features (such as surface composition and catalytic response) can be obtained by the application of easily executable electrochemical protocols.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description In this work, PtSn binary electrodeposits were prepared in three compositions and submitted to successive voltammetric cycles in presence of glycerol (1.0 mol L−1) in acidic media. Catalysts were characterized by energy dispersive X-ray analysis and X-ray photoelectron spectroscopy before and after the cycles being performed, in order to check eventual changes in their compositions during the process. Spectroscopic results show that surface compositions are sensibly richer in Sn than their bulk counterparts. Overall, PtSn catalysts show a poor initial catalytic activity toward glycerol electrooxidation. However, as the cycles succeed, the voltammetric responses increasingly resemble that of Pt, while the oxidation currents increase. Results are rationalized in terms of a continuous enrichment of the surface by Pt at the expenses of a loss of Sn. Moreover, when the electrochemical surface area (ECSA) is estimated by stripping of CO, it becomes evident that electrooxidation currents remain growing, even when the ECSA is decreased, which makes the gain in catalytic activity particularly relevant. Ultimately, from a broader perspective, our results suggest that catalytic surfaces with tunable features (such as surface composition and catalytic response) can be obtained by the application of easily executable electrochemical protocols.
publishDate 2017
dc.date.none.fl_str_mv 2017
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/10915/104788
url http://sedici.unlp.edu.ar/handle/10915/104788
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1868-5994
info:eu-repo/semantics/altIdentifier/doi/10.1007/s12678-016-0332-z
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
1-10
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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