Interaction between residues of different organic compounds on platinum: a mass spectrometric study

Detalhes bibliográficos
Autor(a) principal: Pastor,Elena
Data de Publicação: 1997
Outros Autores: Rodríguez,José L., Castro,Candelaria M., González,Sergio
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=S0103-50531997000200004
Resumo: The consecutive adsorption of formic acid and propargyl alcohol, as well as that of formic acid and ethanol on platinum in acid media were studied by on-line mass spectrometry (DEMS). Oxidation of the coadsorbed species remaining on the electrode surface after a flow-cell experiment yields only CO2. Using isotopically labeled H13COOH, the contribution of formic acid during the electro-oxidation of the coadsorbates can be distinguished from that of ethanol or propargyl alcohol residues. It is found that ethanol replaces formic acid residues, whereas the adsorption of propargyl alcohol is modified by the presence of formic acid on the surface. Formic acid cannot chemisorb on a platinum surface covered by propargyl alcohol residues, but reacts without replacement with platinum modified by ethanol residues.
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spelling Interaction between residues of different organic compounds on platinum: a mass spectrometric studyorganic adlayersmass spectrometryisotopic labelingadsorbate replacementThe consecutive adsorption of formic acid and propargyl alcohol, as well as that of formic acid and ethanol on platinum in acid media were studied by on-line mass spectrometry (DEMS). Oxidation of the coadsorbed species remaining on the electrode surface after a flow-cell experiment yields only CO2. Using isotopically labeled H13COOH, the contribution of formic acid during the electro-oxidation of the coadsorbates can be distinguished from that of ethanol or propargyl alcohol residues. It is found that ethanol replaces formic acid residues, whereas the adsorption of propargyl alcohol is modified by the presence of formic acid on the surface. Formic acid cannot chemisorb on a platinum surface covered by propargyl alcohol residues, but reacts without replacement with platinum modified by ethanol residues.Sociedade Brasileira de Química1997-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000200004Journal of the Brazilian Chemical Society v.8 n.2 1997reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50531997000200004info:eu-repo/semantics/openAccessPastor,ElenaRodríguez,José L.Castro,Candelaria M.González,Sergioeng2012-10-30T00:00:00Zoai:scielo:S0103-50531997000200004Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2012-10-30T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Interaction between residues of different organic compounds on platinum: a mass spectrometric study
title Interaction between residues of different organic compounds on platinum: a mass spectrometric study
spellingShingle Interaction between residues of different organic compounds on platinum: a mass spectrometric study
Pastor,Elena
organic adlayers
mass spectrometry
isotopic labeling
adsorbate replacement
title_short Interaction between residues of different organic compounds on platinum: a mass spectrometric study
title_full Interaction between residues of different organic compounds on platinum: a mass spectrometric study
title_fullStr Interaction between residues of different organic compounds on platinum: a mass spectrometric study
title_full_unstemmed Interaction between residues of different organic compounds on platinum: a mass spectrometric study
title_sort Interaction between residues of different organic compounds on platinum: a mass spectrometric study
author Pastor,Elena
author_facet Pastor,Elena
Rodríguez,José L.
Castro,Candelaria M.
González,Sergio
author_role author
author2 Rodríguez,José L.
Castro,Candelaria M.
González,Sergio
author2_role author
author
author
dc.contributor.author.fl_str_mv Pastor,Elena
Rodríguez,José L.
Castro,Candelaria M.
González,Sergio
dc.subject.por.fl_str_mv organic adlayers
mass spectrometry
isotopic labeling
adsorbate replacement
topic organic adlayers
mass spectrometry
isotopic labeling
adsorbate replacement
description The consecutive adsorption of formic acid and propargyl alcohol, as well as that of formic acid and ethanol on platinum in acid media were studied by on-line mass spectrometry (DEMS). Oxidation of the coadsorbed species remaining on the electrode surface after a flow-cell experiment yields only CO2. Using isotopically labeled H13COOH, the contribution of formic acid during the electro-oxidation of the coadsorbates can be distinguished from that of ethanol or propargyl alcohol residues. It is found that ethanol replaces formic acid residues, whereas the adsorption of propargyl alcohol is modified by the presence of formic acid on the surface. Formic acid cannot chemisorb on a platinum surface covered by propargyl alcohol residues, but reacts without replacement with platinum modified by ethanol residues.
publishDate 1997
dc.date.none.fl_str_mv 1997-01-01
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=S0103-50531997000200004
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000200004
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50531997000200004
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.8 n.2 1997
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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