Ethanol electrooxidation on Pt-Sn and Pt-Sn-W bulk alloys

Detalhes bibliográficos
Autor(a) principal: Anjos,D. M. dos
Data de Publicação: 2008
Outros Autores: Hahn,F., Léger,J. -M., Kokoh,K. B., Tremiliosi-Filho,G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532008000400026
Resumo: Ethanol oxidation has been studied on Pt-Sn and Pt-Sn-W electrodes prepared in an arc-melting furnace. Different electrochemical techniques like cyclic voltammetry and chronoamperometry were used to evaluate the catalytic activity of these materials. The electro-oxidation process was also investigated by in situ infrared reflectance spectroscopy in order to determine adsorbed intermediates and reaction products. Experimental results indicated that Pt-Sn and Pt-Sn-W alloys are able to oxidize ethanol mainly to acetaldehyde and acetic acid. Adsorbed CO was also detected, demonstrating the viability of splitting the C-C bond in the ethanol molecule during the oxidation process. The adsorbed CO was further oxidized to CO2.This reaction product was clearly detected by SNIFTIRS. Pt-Sn-W catalyst showed a better electrochemical performance than Pt-Sn that, in it turn, is better than Pt-alone.
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spelling Ethanol electrooxidation on Pt-Sn and Pt-Sn-W bulk alloysethanol oxidationdirect ethanol fuel cellplatinum-tinplatinum-tin-tungstenin situ Infrared Reflectance SpectroscopyEthanol oxidation has been studied on Pt-Sn and Pt-Sn-W electrodes prepared in an arc-melting furnace. Different electrochemical techniques like cyclic voltammetry and chronoamperometry were used to evaluate the catalytic activity of these materials. The electro-oxidation process was also investigated by in situ infrared reflectance spectroscopy in order to determine adsorbed intermediates and reaction products. Experimental results indicated that Pt-Sn and Pt-Sn-W alloys are able to oxidize ethanol mainly to acetaldehyde and acetic acid. Adsorbed CO was also detected, demonstrating the viability of splitting the C-C bond in the ethanol molecule during the oxidation process. The adsorbed CO was further oxidized to CO2.This reaction product was clearly detected by SNIFTIRS. Pt-Sn-W catalyst showed a better electrochemical performance than Pt-Sn that, in it turn, is better than Pt-alone.Sociedade Brasileira de Química2008-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532008000400026Journal of the Brazilian Chemical Society v.19 n.4 2008reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532008000400026info:eu-repo/semantics/openAccessAnjos,D. M. dosHahn,F.Léger,J. -M.Kokoh,K. B.Tremiliosi-Filho,G.eng2008-06-11T00:00:00Zoai:scielo:S0103-50532008000400026Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2008-06-11T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Ethanol electrooxidation on Pt-Sn and Pt-Sn-W bulk alloys
title Ethanol electrooxidation on Pt-Sn and Pt-Sn-W bulk alloys
spellingShingle Ethanol electrooxidation on Pt-Sn and Pt-Sn-W bulk alloys
Anjos,D. M. dos
ethanol oxidation
direct ethanol fuel cell
platinum-tin
platinum-tin-tungsten
in situ Infrared Reflectance Spectroscopy
title_short Ethanol electrooxidation on Pt-Sn and Pt-Sn-W bulk alloys
title_full Ethanol electrooxidation on Pt-Sn and Pt-Sn-W bulk alloys
title_fullStr Ethanol electrooxidation on Pt-Sn and Pt-Sn-W bulk alloys
title_full_unstemmed Ethanol electrooxidation on Pt-Sn and Pt-Sn-W bulk alloys
title_sort Ethanol electrooxidation on Pt-Sn and Pt-Sn-W bulk alloys
author Anjos,D. M. dos
author_facet Anjos,D. M. dos
Hahn,F.
Léger,J. -M.
Kokoh,K. B.
Tremiliosi-Filho,G.
author_role author
author2 Hahn,F.
Léger,J. -M.
Kokoh,K. B.
Tremiliosi-Filho,G.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Anjos,D. M. dos
Hahn,F.
Léger,J. -M.
Kokoh,K. B.
Tremiliosi-Filho,G.
dc.subject.por.fl_str_mv ethanol oxidation
direct ethanol fuel cell
platinum-tin
platinum-tin-tungsten
in situ Infrared Reflectance Spectroscopy
topic ethanol oxidation
direct ethanol fuel cell
platinum-tin
platinum-tin-tungsten
in situ Infrared Reflectance Spectroscopy
description Ethanol oxidation has been studied on Pt-Sn and Pt-Sn-W electrodes prepared in an arc-melting furnace. Different electrochemical techniques like cyclic voltammetry and chronoamperometry were used to evaluate the catalytic activity of these materials. The electro-oxidation process was also investigated by in situ infrared reflectance spectroscopy in order to determine adsorbed intermediates and reaction products. Experimental results indicated that Pt-Sn and Pt-Sn-W alloys are able to oxidize ethanol mainly to acetaldehyde and acetic acid. Adsorbed CO was also detected, demonstrating the viability of splitting the C-C bond in the ethanol molecule during the oxidation process. The adsorbed CO was further oxidized to CO2.This reaction product was clearly detected by SNIFTIRS. Pt-Sn-W catalyst showed a better electrochemical performance than Pt-Sn that, in it turn, is better than Pt-alone.
publishDate 2008
dc.date.none.fl_str_mv 2008-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532008000400026
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532008000400026
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532008000400026
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.19 n.4 2008
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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