Ethanol electrooxidation using Ti/(RuO2)(x) Pt(1-x) electrodes prepared by the polymeric precursor method

Detalhes bibliográficos
Autor(a) principal: Freitas,R. G
Data de Publicação: 2011
Outros Autores: Marchesi,L. F. Q. P, Forim,M. R, Bulhões,L. O. S, Pereira,E. C, Santos,M. C, Oliveira,R. T. S
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=S0103-50532011000900013
Resumo: This work describes a detailed study of the ethanol electrooxidation on Ti/(RuO2)(x)Pt(1-x) electrodes using several compositions prepared by the polymeric precursor method. The results obtained using cyclic voltammetry and chronoamperometry showed that the best composition of Ti/(RuO2)(x)Pt(1-x) electrodes for CO and ethanol oxidation processes is Ti/(RuO2)0.50Pt0.50. On this electrode composition the onset of CO and the ethanol oxidation occurred at 380 mV and 220 mV more negative than on Ti/Pt, respectively. Besides, there was an increase of 2.5-fold in the current density for ethanol electrooxidation under constant potential polarization. The Ti/(RuO2)0.50Pt0.50 electrodes produced lower amount of acetic acid compared to Ti/Pt and polycrystalline Pt electrodes using in situ HPLC spectrometric analysis. Also, a non common product from ethanol oxidation could be observed on higher RuO2 loads: ethyl acetate. Finally, the impedance data showed that Ti/(RuO2)0.50Pt0.50 electrode composition had the smallest charge transfer resistance for ethanol oxidation among those compositions investigated
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spelling Ethanol electrooxidation using Ti/(RuO2)(x) Pt(1-x) electrodes prepared by the polymeric precursor methodethanol electrooxidationpolymeric precursor methodCO electrooxidationeletrocatalysisin situ HPLCThis work describes a detailed study of the ethanol electrooxidation on Ti/(RuO2)(x)Pt(1-x) electrodes using several compositions prepared by the polymeric precursor method. The results obtained using cyclic voltammetry and chronoamperometry showed that the best composition of Ti/(RuO2)(x)Pt(1-x) electrodes for CO and ethanol oxidation processes is Ti/(RuO2)0.50Pt0.50. On this electrode composition the onset of CO and the ethanol oxidation occurred at 380 mV and 220 mV more negative than on Ti/Pt, respectively. Besides, there was an increase of 2.5-fold in the current density for ethanol electrooxidation under constant potential polarization. The Ti/(RuO2)0.50Pt0.50 electrodes produced lower amount of acetic acid compared to Ti/Pt and polycrystalline Pt electrodes using in situ HPLC spectrometric analysis. Also, a non common product from ethanol oxidation could be observed on higher RuO2 loads: ethyl acetate. Finally, the impedance data showed that Ti/(RuO2)0.50Pt0.50 electrode composition had the smallest charge transfer resistance for ethanol oxidation among those compositions investigatedSociedade Brasileira de Química2011-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000900013Journal of the Brazilian Chemical Society v.22 n.9 2011reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532011000900013info:eu-repo/semantics/openAccessFreitas,R. GMarchesi,L. F. Q. PForim,M. RBulhões,L. O. SPereira,E. CSantos,M. COliveira,R. T. Seng2011-09-20T00:00:00Zoai:scielo:S0103-50532011000900013Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2011-09-20T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Ethanol electrooxidation using Ti/(RuO2)(x) Pt(1-x) electrodes prepared by the polymeric precursor method
title Ethanol electrooxidation using Ti/(RuO2)(x) Pt(1-x) electrodes prepared by the polymeric precursor method
spellingShingle Ethanol electrooxidation using Ti/(RuO2)(x) Pt(1-x) electrodes prepared by the polymeric precursor method
Freitas,R. G
ethanol electrooxidation
polymeric precursor method
CO electrooxidation
eletrocatalysis
in situ HPLC
title_short Ethanol electrooxidation using Ti/(RuO2)(x) Pt(1-x) electrodes prepared by the polymeric precursor method
title_full Ethanol electrooxidation using Ti/(RuO2)(x) Pt(1-x) electrodes prepared by the polymeric precursor method
title_fullStr Ethanol electrooxidation using Ti/(RuO2)(x) Pt(1-x) electrodes prepared by the polymeric precursor method
title_full_unstemmed Ethanol electrooxidation using Ti/(RuO2)(x) Pt(1-x) electrodes prepared by the polymeric precursor method
title_sort Ethanol electrooxidation using Ti/(RuO2)(x) Pt(1-x) electrodes prepared by the polymeric precursor method
author Freitas,R. G
author_facet Freitas,R. G
Marchesi,L. F. Q. P
Forim,M. R
Bulhões,L. O. S
Pereira,E. C
Santos,M. C
Oliveira,R. T. S
author_role author
author2 Marchesi,L. F. Q. P
Forim,M. R
Bulhões,L. O. S
Pereira,E. C
Santos,M. C
Oliveira,R. T. S
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Freitas,R. G
Marchesi,L. F. Q. P
Forim,M. R
Bulhões,L. O. S
Pereira,E. C
Santos,M. C
Oliveira,R. T. S
dc.subject.por.fl_str_mv ethanol electrooxidation
polymeric precursor method
CO electrooxidation
eletrocatalysis
in situ HPLC
topic ethanol electrooxidation
polymeric precursor method
CO electrooxidation
eletrocatalysis
in situ HPLC
description This work describes a detailed study of the ethanol electrooxidation on Ti/(RuO2)(x)Pt(1-x) electrodes using several compositions prepared by the polymeric precursor method. The results obtained using cyclic voltammetry and chronoamperometry showed that the best composition of Ti/(RuO2)(x)Pt(1-x) electrodes for CO and ethanol oxidation processes is Ti/(RuO2)0.50Pt0.50. On this electrode composition the onset of CO and the ethanol oxidation occurred at 380 mV and 220 mV more negative than on Ti/Pt, respectively. Besides, there was an increase of 2.5-fold in the current density for ethanol electrooxidation under constant potential polarization. The Ti/(RuO2)0.50Pt0.50 electrodes produced lower amount of acetic acid compared to Ti/Pt and polycrystalline Pt electrodes using in situ HPLC spectrometric analysis. Also, a non common product from ethanol oxidation could be observed on higher RuO2 loads: ethyl acetate. Finally, the impedance data showed that Ti/(RuO2)0.50Pt0.50 electrode composition had the smallest charge transfer resistance for ethanol oxidation among those compositions investigated
publishDate 2011
dc.date.none.fl_str_mv 2011-09-01
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=S0103-50532011000900013
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532011000900013
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532011000900013
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.22 n.9 2011
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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