Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/49525

TitleElectrogenerated HO radical reactions: the role of competing reactions on the degradation kinetics of hydroxy-containing aromatic compounds
Author(s)Oliveira, Raquel Santos
Geraldo, Dulce
Bento, M. Fátima
KeywordsAromatic compounds
Hydroxyl radicals
Kinetic model and competing reactions
Issue date20-Jul-2014
PublisherPergamon-Elsevier Science Ltd
JournalElectrochimica Acta
Abstract(s)The rate of degradation of some aromatic compounds, benzoic acid, 2-hydroxybenzoic acid, 4-hydroxybenzoic acid and 2,3-hydroxybenzoic acid, by electrogenerated HO radicals is investigated. The effect of the addition of secondary species, that can either be a reaction product of the target compound or not is analysed. The presence of the actual reaction products is also considered. The action of these secondary species is integrated in a general model that accounts for the dependency of the anode coverage by HO radicals on the concentration and on the reactivity of HO radical scavengers. From the magnitude of the effect of competing reactions, the reactivity of the hydroxybenzoic acid derivatives was estimated as the product between the stoichiometric coefficients and the rate constants. A possible mechanistic interpretation is provided to explain the unexpected high values of the stoichiometric coefficients estimated that largely exceed the number of radicals required for the complete mineralization of the species. (C) 2014 Elsevier Ltd. All rights reserved.
TypeArticle
URIhttp://hdl.handle.net/1822/49525
DOI10.1016/j.electacta.2014.04.012
ISSN0013-4686
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CDQuim - Artigos (Papers)

Files in This Item:
File Description SizeFormat 
manuscript_Repositorium.pdf9,41 MBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID