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The generation of hydroxyl radicals and electro-oxidation of diclofenac on Pt-doped SnO<inf>2</inf>–Sb electrodes

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dc.contributor.author Fernández-Aguirre M.G.
dc.contributor.author Berenguer R.
dc.contributor.author Beaumont S.
dc.contributor.author Nuez M.
dc.contributor.author LA ROSA TORO GOMEZ, ADOLFO
dc.contributor.author Peralta-Hernández J.M.
dc.contributor.author Morallón E.
dc.date.accessioned 2023-11-24T18:09:11Z
dc.date.available 2023-11-24T18:09:11Z
dc.date.created 2022-10-09
dc.date.issued 2020-09-10
dc.description.abstract Pt-doped SnO2–Sb electrodes constitute promising candidates for the electrochemical abatement of refractory pollutants, but their efficacy to oxidize emerging pollutants remains uncertain. In this work, the electrochemical oxidation of diclofenac, pharmaceutical pollutant, on Pt-doped Ti/SnO2–Sb electrodes has been studied by cyclic voltammetry and galvanostatic treatment in neutral medium. In parallel, the capability of these anodes to generate hydroxyl radicals ([rad]OHs) has been analyzed by in-situ UV spectroelectrochemical measurements. For comparison purposes, the responses of Ti/SnO2–Sb and commercial Ti/Pt and BDD anodes were also evaluated. The voltammetric and electrolysis results show that the different Ti/SnO2–Sb anodes can effectively oxidize and mineralize diclofenac, so their electrochemical activity lies in between that of Ti/Pt and BDD. The incorporation of small amounts of Pt (3–13 at.%) into the SnO2–Sb coatings, despite hindering the [rad]OHs generation, enhances the kinetics and efficiency for diclofenac oxidation and mineralization. This better overall response is attributed to a synergy between diclofenac-Pt interaction and efficient [rad]OHs generation. Pt-doped Ti/SnO2–Sb electrodes are then presented as a cheaper potential alternative to BDD for treating pharmaceutics pollutants in waters.
dc.description.sponsorship The authors thank the Spanish Ministerio de Economía y Competitividad ( MINECO ) and FEDER funds (grants MAT2016-76595-R and RYC-2017-23618 ) and Generalitat Valenciana (grant PROMETEO/2018/087 ) for financial support.
dc.identifier.doi 10.1016/j.electacta.2020.136686
dc.identifier.scopus 2-s2.0-85087808574
dc.identifier.uri https://www.perucris.pe/handle/123456789/80244
dc.language.iso en
dc.publisher Elsevier Ltd
dc.relation.ispartofseries Electrochimica Acta
dc.relation.issn 00134686
dc.subject Anodic oxidation
dc.subject Diclofenac removal
dc.subject Electrocatalysis
dc.subject Hydroxyl radicals
dc.subject Tin dioxide electrodes
dc.title The generation of hydroxyl radicals and electro-oxidation of diclofenac on Pt-doped SnO<inf>2</inf>–Sb electrodes
dc.type Controlled Vocabulary for Resource Type Genres::texto::revista::artículo
dspace.entity.type CvPublicationClone
oaire.citation.volume 354
oairecerif.access http://purl.org/coar/access_right/c_abf2
oairecerif.affiliation.orgunit Universitat d'Alacant
oairecerif.affiliation.orgunit Universitat d'Alacant
oairecerif.affiliation.orgunit Universitat d'Alacant
oairecerif.affiliation.orgunit Universitat d'Alacant
oairecerif.affiliation.orgunit Universidad Nacional de Ingenieria, Lima
oairecerif.affiliation.orgunit Universidad de Guanajuato
oairecerif.affiliation.orgunit Universitat d'Alacant
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oairecerif.author.affiliation Universidad Nacional de Ingeniería
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oairecerif.citation.number 136686
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perucris.subject.ocde oecd::Ciencias naturales::Química::Electroquímica
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