Carbon-supported PtSnCu, PtCu and PtSn electrocatalysts for ethanol oxidation in acid media

Detalhes bibliográficos
Autor(a) principal: Magalhães,Monah M.
Data de Publicação: 2014
Outros Autores: Colmati,Flavio
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=S0103-50532014000800001
Resumo: Carbon-supported PtSnCu, PtSn, PtCu and Pt electro-catalysts were prepared by reduction of metal precursors in ethanol reflux. These materials were characterized by energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). Electrochemical properties were characterized by cyclic voltammetry and chronoamperometry in presence and absence of ethanol in the electrolyte solution. Results showed a metal nanoparticle homogeneous distribution on the carbon support with small agglomerate formation, particle sizes were determined as 2-4 nm and solid solutions formation were observed. The electrochemical characterization evidenced the material stability and a drastic decrease of the onset potential for ethanol electrochemical reaction was observed when Cu is used as a modifying compound to the PtSn electrocatalyst.
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spelling Carbon-supported PtSnCu, PtCu and PtSn electrocatalysts for ethanol oxidation in acid mediaPtSnCuelectrocatalysisDEFCethanol oxidationPEMFCCarbon-supported PtSnCu, PtSn, PtCu and Pt electro-catalysts were prepared by reduction of metal precursors in ethanol reflux. These materials were characterized by energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). Electrochemical properties were characterized by cyclic voltammetry and chronoamperometry in presence and absence of ethanol in the electrolyte solution. Results showed a metal nanoparticle homogeneous distribution on the carbon support with small agglomerate formation, particle sizes were determined as 2-4 nm and solid solutions formation were observed. The electrochemical characterization evidenced the material stability and a drastic decrease of the onset potential for ethanol electrochemical reaction was observed when Cu is used as a modifying compound to the PtSn electrocatalyst.Sociedade Brasileira de Química2014-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532014000800001Journal of the Brazilian Chemical Society v.25 n.8 2014reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0103-5053.20140111info:eu-repo/semantics/openAccessMagalhães,Monah M.Colmati,Flavioeng2014-08-04T00:00:00Zoai:scielo:S0103-50532014000800001Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2014-08-04T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Carbon-supported PtSnCu, PtCu and PtSn electrocatalysts for ethanol oxidation in acid media
title Carbon-supported PtSnCu, PtCu and PtSn electrocatalysts for ethanol oxidation in acid media
spellingShingle Carbon-supported PtSnCu, PtCu and PtSn electrocatalysts for ethanol oxidation in acid media
Magalhães,Monah M.
PtSnCu
electrocatalysis
DEFC
ethanol oxidation
PEMFC
title_short Carbon-supported PtSnCu, PtCu and PtSn electrocatalysts for ethanol oxidation in acid media
title_full Carbon-supported PtSnCu, PtCu and PtSn electrocatalysts for ethanol oxidation in acid media
title_fullStr Carbon-supported PtSnCu, PtCu and PtSn electrocatalysts for ethanol oxidation in acid media
title_full_unstemmed Carbon-supported PtSnCu, PtCu and PtSn electrocatalysts for ethanol oxidation in acid media
title_sort Carbon-supported PtSnCu, PtCu and PtSn electrocatalysts for ethanol oxidation in acid media
author Magalhães,Monah M.
author_facet Magalhães,Monah M.
Colmati,Flavio
author_role author
author2 Colmati,Flavio
author2_role author
dc.contributor.author.fl_str_mv Magalhães,Monah M.
Colmati,Flavio
dc.subject.por.fl_str_mv PtSnCu
electrocatalysis
DEFC
ethanol oxidation
PEMFC
topic PtSnCu
electrocatalysis
DEFC
ethanol oxidation
PEMFC
description Carbon-supported PtSnCu, PtSn, PtCu and Pt electro-catalysts were prepared by reduction of metal precursors in ethanol reflux. These materials were characterized by energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). Electrochemical properties were characterized by cyclic voltammetry and chronoamperometry in presence and absence of ethanol in the electrolyte solution. Results showed a metal nanoparticle homogeneous distribution on the carbon support with small agglomerate formation, particle sizes were determined as 2-4 nm and solid solutions formation were observed. The electrochemical characterization evidenced the material stability and a drastic decrease of the onset potential for ethanol electrochemical reaction was observed when Cu is used as a modifying compound to the PtSn electrocatalyst.
publishDate 2014
dc.date.none.fl_str_mv 2014-08-01
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=S0103-50532014000800001
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532014000800001
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.5935/0103-5053.20140111
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.25 n.8 2014
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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