Aromatic hydroxylation reactions by electrogenerated HO radicals: a kinetic study
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , |
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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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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799132542763270144 |