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The nature of the electro-catalytic response of mixed metal oxides: Pt- and Ru-doped SnO2 anodes

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The nature of the electro-catalytic response of mixed metal oxides: Pt- and Ru-doped SnO2 anodes

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dc.contributor.author Berenguer Betrián, Raúl es_ES
dc.contributor.author Quijada, C. es_ES
dc.contributor.author Morallón, Emilia es_ES
dc.date.accessioned 2020-04-24T07:12:51Z
dc.date.available 2020-04-24T07:12:51Z
dc.date.issued 2019 es_ES
dc.identifier.uri http://hdl.handle.net/10251/141423
dc.description "This is the peer reviewed version of the following article: The nature of the electro-catalytic response of mixed metal oxides: Pt- and Ru-doped SnO2 anodes, which has been published in final form at https://doi.org/10.1002/celc.201801632. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving." es_ES
dc.description.abstract [EN] The catalytic behavior of metal oxides for oxidative reactions is generally classified into active or non-active, depending on whether surface redox species participate or not. In the case of mixed metal oxides, however, this simplified scenario may be more complex. Non-active oxides containing electroactive metal species, like Pt- and/or Ru-doped SnO2 electrodes, are promising anode materials for the electrochemical treatment of waste-waters. This work analyzes the effect of Pt and Ru species on the nature of the electro-oxidative catalytic response of Ti/SnO2 anodes. For this purpose, the electro-oxidation of phenol and the competing oxygen evolution reaction (OER) in NaOH have been chosen as model reactions. The different electrodes and reactions were characterized by cyclic voltammetry, electro- chemical impedance spectroscopy, and Tafel measurements. The obtained results reveal that both Pt and Ru introduce solid-state redox processes and catalyze the OER and the phenol oxidation onto Ti/SnO2-based electrodes. Nevertheless, the dopants induce quite different active behaviors in the mixed oxides. Pt practically does not affect the OER mechanism, but enhances its kinetics, so its electrocatalytic activity is associated with a specific adsorption of hydroxyl anions or phenolate on Pt sites, without participation of the irreversible Pt/PtOx couple (i.e. a "non-redox-active" behavior). On the contrary, Ru species involve various and highly reversible redox processes that accelerate and modify the rate-determining step of the OER, and that actively mediate in the phenol oxidation. es_ES
dc.description.sponsorship Financial support from the Spanish Ministerio de Economia y Competitividad and FEDER funds (MAT2016-76595-R, IJCI-201420012) is gratefully acknowledged. es_ES
dc.language Inglés es_ES
dc.publisher John Wiley & Sons es_ES
dc.relation MINECO-FEDER/MAT2016-76595-R es_ES
dc.relation info:eu-repo/grantAgreement/MINECO//IJCI-2014-20012/ES/IJCI-2014-20012/ es_ES
dc.relation.ispartof ChemElectroChem es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Pt-doped tin dioxide electrodes es_ES
dc.subject Ru-doped tin dioxide electrodes es_ES
dc.subject DSA es_ES
dc.subject Electrocatalysis es_ES
dc.subject Impedance spectroscopy es_ES
dc.subject.classification QUIMICA FISICA es_ES
dc.title The nature of the electro-catalytic response of mixed metal oxides: Pt- and Ru-doped SnO2 anodes es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1002/celc.201801632 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Textil y Papelera - Departament d'Enginyeria Tèxtil i Paperera es_ES
dc.description.bibliographicCitation Berenguer Betrián, R.; Quijada, C.; Morallón, E. (2019). The nature of the electro-catalytic response of mixed metal oxides: Pt- and Ru-doped SnO2 anodes. ChemElectroChem. 6(4):1057-1068. https://doi.org/10.1002/celc.201801632 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1002/celc.201801632 es_ES
dc.description.upvformatpinicio 1057 es_ES
dc.description.upvformatpfin 1068 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 6 es_ES
dc.description.issue 4 es_ES
dc.identifier.eissn 2196-0216 es_ES
dc.relation.pasarela S\378715 es_ES
dc.contributor.funder European Regional Development Fund es_ES
dc.contributor.funder Ministerio de Economía y Competitividad es_ES


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