dc.creatorKessler, Teresita
dc.creatorTriaca, Walter Enrique
dc.creatorArvia, Alejandro Jorge
dc.date1994
dc.date2022-06-14T17:13:50Z
dc.date.accessioned2023-07-15T04:44:56Z
dc.date.available2023-07-15T04:44:56Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/137887
dc.identifierissn:0021-891x
dc.identifierissn:1572-8838
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7470735
dc.descriptionOxygen evolution reaction (o.e.r.) kinetics in NaOH solutions have been studied on both fresh and oxide covered Co50Ni25Si15B10 amorphous alloy (G-16) electrodes. Steady state polarization curves obtained in different aqueous xM NaOH (0.1 ⩽ x ⩽ 4) in the 30–80°C range fulfill Tafel relationships at low overpotentials; the Tafel slope is close to 2.3(RT/F) V dec−1 for both G-16 and oxide coated G-16 electrodes. At high overpotentials, ohmic relationships with slopes becoming increasingly steep, regardless of the NaOH concentration, are observed. In the Tafel region, the reaction order with respect to OH− is near 2. The apparent current density at constant potential, for oxide coated G-16 electrodes, is greater than that for uncoated G-16. The high catalytic activity of the oxide coated G-16 for the o.e.r. is attributed to its spinel-type structure. The kinetics of the o.e.r. at low overpotentials is explained through a mechanism involving a first electron transfer step followed by a rate-determining chemical step.
dc.descriptionFacultad de Ingeniería
dc.descriptionInstituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
dc.formatapplication/pdf
dc.format310-315
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectCiencias Exactas
dc.subjectFísica
dc.subjectOxygen evolution reaction
dc.subjectTafel relationships
dc.subjectOxide coated G-16 electrodes
dc.titleKinetics and mechanism of the oxygen evolution reaction at oxide-coated Co-Ni amorphous alloy electrodes
dc.typeArticulo
dc.typeArticulo


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