Aromatic hydroxylation reactions by electrogenerated HO radicals: a kinetic study

Detalhes bibliográficos
Autor(a) principal: Oliveira, Raquel
Data de Publicação: 2012
Outros Autores: Bento, M. Fátima, Geraldo, M. Dulce
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/1822/21093
Resumo: The oxidation of benzoic acid (BA) and of 4-hydroxybenzoic acid (4-HBA) by galvanostatic electrolysis with simultaneous oxygen evolution, using BDD or Pt as anode materials is studied. Results concerning the oxidation kinetics as well as the identification and quantification of hydroxylated products are reported. First order kinetics are used to describe the consumption rates of both compounds despite of the anode material and of the applied current density. A simple kinetic model that accounts for the anode surface coverage by HO radicals is proposed. Based on this model it is possible to correlate the apparent rate constant of the organic consumption with kinetic parameter related to the organics reactivity and to the degree of the adsorption of HO radicals to the anode surface.
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spelling Aromatic hydroxylation reactions by electrogenerated HO radicals: a kinetic studyElectrochemical oxidationKinetic modelHydroxyl radicalBenzoic acidPlatinumBoron-doped diamondScience & TechnologyThe oxidation of benzoic acid (BA) and of 4-hydroxybenzoic acid (4-HBA) by galvanostatic electrolysis with simultaneous oxygen evolution, using BDD or Pt as anode materials is studied. Results concerning the oxidation kinetics as well as the identification and quantification of hydroxylated products are reported. First order kinetics are used to describe the consumption rates of both compounds despite of the anode material and of the applied current density. A simple kinetic model that accounts for the anode surface coverage by HO radicals is proposed. Based on this model it is possible to correlate the apparent rate constant of the organic consumption with kinetic parameter related to the organics reactivity and to the degree of the adsorption of HO radicals to the anode surface.FCT (Fundação para a Ciência e Tecnologia); FEDER (European Fund for Regional Development); COMPETE-QREN-EU; CQ/UM (Centro de Química / Universidade do Minho), POPH Programa Operacional Potencial Humano); FSE (Fundo Social Europeu)ElsevierUniversidade do MinhoOliveira, RaquelBento, M. FátimaGeraldo, M. Dulce2012-08-152012-08-15T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/21093engOliveira, R., Bento, F., & Geraldo, D. (2012, August). Aromatic hydroxylation reactions by electrogenerated HO radicals: A kinetic study. Journal of Electroanalytical Chemistry. Elsevier BV. http://doi.org/10.1016/j.jelechem.2012.06.0171572-665710.1016/j.jelechem.2012.06.017http://www.sciencedirect.com/science/article/pii/S1572665712002470info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:18:20Zoai:repositorium.sdum.uminho.pt:1822/21093Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:11:08.870376Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Aromatic hydroxylation reactions by electrogenerated HO radicals: a kinetic study
title Aromatic hydroxylation reactions by electrogenerated HO radicals: a kinetic study
spellingShingle Aromatic hydroxylation reactions by electrogenerated HO radicals: a kinetic study
Oliveira, Raquel
Electrochemical oxidation
Kinetic model
Hydroxyl radical
Benzoic acid
Platinum
Boron-doped diamond
Science & Technology
title_short Aromatic hydroxylation reactions by electrogenerated HO radicals: a kinetic study
title_full Aromatic hydroxylation reactions by electrogenerated HO radicals: a kinetic study
title_fullStr Aromatic hydroxylation reactions by electrogenerated HO radicals: a kinetic study
title_full_unstemmed Aromatic hydroxylation reactions by electrogenerated HO radicals: a kinetic study
title_sort Aromatic hydroxylation reactions by electrogenerated HO radicals: a kinetic study
author Oliveira, Raquel
author_facet Oliveira, Raquel
Bento, M. Fátima
Geraldo, M. Dulce
author_role author
author2 Bento, M. Fátima
Geraldo, M. Dulce
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Oliveira, Raquel
Bento, M. Fátima
Geraldo, M. Dulce
dc.subject.por.fl_str_mv Electrochemical oxidation
Kinetic model
Hydroxyl radical
Benzoic acid
Platinum
Boron-doped diamond
Science & Technology
topic Electrochemical oxidation
Kinetic model
Hydroxyl radical
Benzoic acid
Platinum
Boron-doped diamond
Science & Technology
description The oxidation of benzoic acid (BA) and of 4-hydroxybenzoic acid (4-HBA) by galvanostatic electrolysis with simultaneous oxygen evolution, using BDD or Pt as anode materials is studied. Results concerning the oxidation kinetics as well as the identification and quantification of hydroxylated products are reported. First order kinetics are used to describe the consumption rates of both compounds despite of the anode material and of the applied current density. A simple kinetic model that accounts for the anode surface coverage by HO radicals is proposed. Based on this model it is possible to correlate the apparent rate constant of the organic consumption with kinetic parameter related to the organics reactivity and to the degree of the adsorption of HO radicals to the anode surface.
publishDate 2012
dc.date.none.fl_str_mv 2012-08-15
2012-08-15T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://hdl.handle.net/1822/21093
url https://hdl.handle.net/1822/21093
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Oliveira, R., Bento, F., & Geraldo, D. (2012, August). Aromatic hydroxylation reactions by electrogenerated HO radicals: A kinetic study. Journal of Electroanalytical Chemistry. Elsevier BV. http://doi.org/10.1016/j.jelechem.2012.06.017
1572-6657
10.1016/j.jelechem.2012.06.017
http://www.sciencedirect.com/science/article/pii/S1572665712002470
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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