Investigation of the surface properties and the hydrogen evolution reaction, HER, at thermal rhodium oxide electrodes

dc.creatorGouveia, H
dc.creatorLanders, R
dc.creatorBoodts, JFC
dc.date2007
dc.dateFEB 1
dc.date2014-11-17T03:02:22Z
dc.date2015-11-26T16:27:30Z
dc.date2014-11-17T03:02:22Z
dc.date2015-11-26T16:27:30Z
dc.date.accessioned2018-03-28T23:08:26Z
dc.date.available2018-03-28T23:08:26Z
dc.identifierElectrochimica Acta. Pergamon-elsevier Science Ltd, v. 52, n. 7, n. 2359, n. 2369, 2007.
dc.identifier0013-4686
dc.identifierWOS:000244344100003
dc.identifier10.1016/j.electacta.2006.08.042
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/60644
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/60644
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/60644
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1269206
dc.descriptionA systematic investigation was conducted of the surface properties and the HER at electrodes of nominal composition Ti/RhxTi((1-x))O-y prepared by thermal decomposition (T-cal: 500 degrees C; t(cal): 2h; O-2 flux: 5 dm(-1) min(-1)) from salt precursor solutions dissolved in 6.0 mol dm(-3) HNO3. Films were characterized ex situ by SEM, EDX, XPS and XRD and in situ by open circuit potential measurements and CV. The electrochemical behaviour was investigated by CV as function of the anodic, E-lambda,E-a, and cathodic, E-lambda,E-c, switching potentials showing the Rh surface oxidation states strongly depend on these experimental variables. Surface Rh-sites are reduced to metallic rhodium in the cathodic potential region while higher oxidation states (I-III) are formed at more positive potentials (E >= 0.5 V/RHE). Hydrogen adsorption and desorption peaks as well as a short double layer charging region are observed at intermediate potential values. The HER was investigated by Tafel coefficients and reaction order with respect to H+ as function of nominal Rh-content. (c) 2006 Elsevier Ltd. All rights reserved.
dc.description52
dc.description7
dc.description2359
dc.description2369
dc.languageen
dc.publisherPergamon-elsevier Science Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationElectrochimica Acta
dc.relationElectrochim. Acta
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectthermal rhodium oxide
dc.subjectEx situ characterisation
dc.subjectvoltammetric behaviours
dc.subjectsurface properties
dc.subjecthydrogen evolution reaction
dc.subjectCathodic Behavior
dc.subjectRuthenium Dioxide
dc.subjectAlkaline-solution
dc.subjectIro2 Electrodes
dc.subjectIridium Oxide
dc.subjectKinetics
dc.subjectFilms
dc.titleInvestigation of the surface properties and the hydrogen evolution reaction, HER, at thermal rhodium oxide electrodes
dc.typeArtículos de revistas


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