A comparative kinetic study of Pb and Pb-Sb electrodes in sulfuric acid solutions

Detalhes bibliográficos
Autor(a) principal: Codaro,E.N.
Data de Publicação: 1997
Outros Autores: Varela,F.E.
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=S0103-50531997000200006
Resumo: The electrochemical responses of Pb and Pb-3.4% Sb electrodes in 5 M H2SO4 were examined combining potential sweep and potential step techniques. The presence of antimony prevents the complete blockage of the electrode active surface by PbSO4 crystals during electro-oxidation, changing the composition and structure of the passive layer. The electro-oxidation of Sb was interpreted in terms of an adsorption-dissolution mechanism where in the rate-determining step one electron is transferred. The growth kinetics of the PbO inner layer was also studied. On the Pb-Sb electrode, the growth rate of PbO decreases because of a change in the transport mechanism of ions through the anodic layer.
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spelling A comparative kinetic study of Pb and Pb-Sb electrodes in sulfuric acid solutionslead-antimony/sulfuric acid systemlead-antimony electro-oxidationlead-antimony alloy electrochemical behaviorThe electrochemical responses of Pb and Pb-3.4% Sb electrodes in 5 M H2SO4 were examined combining potential sweep and potential step techniques. The presence of antimony prevents the complete blockage of the electrode active surface by PbSO4 crystals during electro-oxidation, changing the composition and structure of the passive layer. The electro-oxidation of Sb was interpreted in terms of an adsorption-dissolution mechanism where in the rate-determining step one electron is transferred. The growth kinetics of the PbO inner layer was also studied. On the Pb-Sb electrode, the growth rate of PbO decreases because of a change in the transport mechanism of ions through the anodic layer.Sociedade Brasileira de Química1997-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000200006Journal 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/S0103-50531997000200006info:eu-repo/semantics/openAccessCodaro,E.N.Varela,F.E.eng2012-10-30T00:00:00Zoai:scielo:S0103-50531997000200006Revistahttp://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 A comparative kinetic study of Pb and Pb-Sb electrodes in sulfuric acid solutions
title A comparative kinetic study of Pb and Pb-Sb electrodes in sulfuric acid solutions
spellingShingle A comparative kinetic study of Pb and Pb-Sb electrodes in sulfuric acid solutions
Codaro,E.N.
lead-antimony/sulfuric acid system
lead-antimony electro-oxidation
lead-antimony alloy electrochemical behavior
title_short A comparative kinetic study of Pb and Pb-Sb electrodes in sulfuric acid solutions
title_full A comparative kinetic study of Pb and Pb-Sb electrodes in sulfuric acid solutions
title_fullStr A comparative kinetic study of Pb and Pb-Sb electrodes in sulfuric acid solutions
title_full_unstemmed A comparative kinetic study of Pb and Pb-Sb electrodes in sulfuric acid solutions
title_sort A comparative kinetic study of Pb and Pb-Sb electrodes in sulfuric acid solutions
author Codaro,E.N.
author_facet Codaro,E.N.
Varela,F.E.
author_role author
author2 Varela,F.E.
author2_role author
dc.contributor.author.fl_str_mv Codaro,E.N.
Varela,F.E.
dc.subject.por.fl_str_mv lead-antimony/sulfuric acid system
lead-antimony electro-oxidation
lead-antimony alloy electrochemical behavior
topic lead-antimony/sulfuric acid system
lead-antimony electro-oxidation
lead-antimony alloy electrochemical behavior
description The electrochemical responses of Pb and Pb-3.4% Sb electrodes in 5 M H2SO4 were examined combining potential sweep and potential step techniques. The presence of antimony prevents the complete blockage of the electrode active surface by PbSO4 crystals during electro-oxidation, changing the composition and structure of the passive layer. The electro-oxidation of Sb was interpreted in terms of an adsorption-dissolution mechanism where in the rate-determining step one electron is transferred. The growth kinetics of the PbO inner layer was also studied. On the Pb-Sb electrode, the growth rate of PbO decreases because of a change in the transport mechanism of ions through the anodic layer.
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=S0103-50531997000200006
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000200006
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50531997000200006
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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