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Effect of temperature on the electro-oxidation of ethanol on platinum

Detalhes bibliográficos
Autor(a) principal: Camargo,Ana Paula M.
Data de Publicação: 2010
Outros Autores: Previdello,Bruno A. F., Varela,Hamilton, Gonzalez,Ernesto R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010001000026
Resumo: We present in this work an experimental investigation of the effect of temperature (from 25 to 180 ºC) in the electro-oxidation of ethanol on platinum in two different phosphoric acid concentrations. We observed that the onset potential for ethanol electro-oxidation shifts to lower values and the reaction rates increase as temperature is increased for both electrolytes. The results were rationalized in terms of the effect of temperature on the adsorption of reaction intermediates, poisons, and anions. The formation of oxygenated species at high potentials, mainly in the more diluted electrolyte, also contributes to increase the electro-oxidation reaction rate.
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spelling Effect of temperature on the electro-oxidation of ethanol on platinumethanolfuel cellshigh temperatureWe present in this work an experimental investigation of the effect of temperature (from 25 to 180 ºC) in the electro-oxidation of ethanol on platinum in two different phosphoric acid concentrations. We observed that the onset potential for ethanol electro-oxidation shifts to lower values and the reaction rates increase as temperature is increased for both electrolytes. The results were rationalized in terms of the effect of temperature on the adsorption of reaction intermediates, poisons, and anions. The formation of oxygenated species at high potentials, mainly in the more diluted electrolyte, also contributes to increase the electro-oxidation reaction rate.Sociedade Brasileira de Química2010-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010001000026Química Nova v.33 n.10 2010reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422010001000026info:eu-repo/semantics/openAccessCamargo,Ana Paula M.Previdello,Bruno A. F.Varela,HamiltonGonzalez,Ernesto R.eng2010-12-15T00:00:00Zoai:scielo:S0100-40422010001000026Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2010-12-15T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Effect of temperature on the electro-oxidation of ethanol on platinum
title Effect of temperature on the electro-oxidation of ethanol on platinum
spellingShingle Effect of temperature on the electro-oxidation of ethanol on platinum
Camargo,Ana Paula M.
ethanol
fuel cells
high temperature
title_short Effect of temperature on the electro-oxidation of ethanol on platinum
title_full Effect of temperature on the electro-oxidation of ethanol on platinum
title_fullStr Effect of temperature on the electro-oxidation of ethanol on platinum
title_full_unstemmed Effect of temperature on the electro-oxidation of ethanol on platinum
title_sort Effect of temperature on the electro-oxidation of ethanol on platinum
author Camargo,Ana Paula M.
author_facet Camargo,Ana Paula M.
Previdello,Bruno A. F.
Varela,Hamilton
Gonzalez,Ernesto R.
author_role author
author2 Previdello,Bruno A. F.
Varela,Hamilton
Gonzalez,Ernesto R.
author2_role author
author
author
dc.contributor.author.fl_str_mv Camargo,Ana Paula M.
Previdello,Bruno A. F.
Varela,Hamilton
Gonzalez,Ernesto R.
dc.subject.por.fl_str_mv ethanol
fuel cells
high temperature
topic ethanol
fuel cells
high temperature
description We present in this work an experimental investigation of the effect of temperature (from 25 to 180 ºC) in the electro-oxidation of ethanol on platinum in two different phosphoric acid concentrations. We observed that the onset potential for ethanol electro-oxidation shifts to lower values and the reaction rates increase as temperature is increased for both electrolytes. The results were rationalized in terms of the effect of temperature on the adsorption of reaction intermediates, poisons, and anions. The formation of oxygenated species at high potentials, mainly in the more diluted electrolyte, also contributes to increase the electro-oxidation reaction rate.
publishDate 2010
dc.date.none.fl_str_mv 2010-01-01
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=S0100-40422010001000026
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010001000026
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0100-40422010001000026
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 Química Nova v.33 n.10 2010
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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