Kinetics and mechanism of anodic oxidation of nitrite ion in nitrate melts on platinum electrodes

dc.creatorMartins, María Elisa
dc.creatorCalandra, Alfredo J.
dc.creatorArvia, Alejandro Jorge
dc.date1970
dc.date2021-07-12T17:18:52Z
dc.date.accessioned2023-07-15T02:24:41Z
dc.date.available2023-07-15T02:24:41Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/121502
dc.identifierissn:0013-4686
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7461848
dc.descriptionThe electrochemical oxidation of nitrite ion in KNO<sub>3</sub>-NaNO<sub>3</sub> eutectic melt on a platinum rotating disk electrode has been studied in the temperature range 247 to 312°C. The current/voltage curves comprise at least two regions. At high overvoltages the process is under a net convective diffusion control whereas at low ones the kinetics of the electrode process involves both convective diffusion and activation-polarization terms. From the current/voltage curves the kinetic parameters of each contribution are evaluated as well as the diffusion coefficient of nitrite ion in the melt. The electrode process is discussed in terms of the over-all reaction NO<sub>2</sub>− → NO<sub>2</sub> + e and of the reaction mechanisms previously postulated, where the initial electron-transfer step becomes rate-determining as the nitrite ion concentration diminishes. The results are compared to those obtained with the pure nitrite melt.
dc.descriptionInstituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
dc.formatapplication/pdf
dc.format111-126
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by/4.0/
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0)
dc.subjectCiencias Exactas
dc.subjectQuímica
dc.subjectElectrochemical oxidation
dc.subjectPlatinum
dc.subjectKinetic parameters
dc.titleKinetics and mechanism of anodic oxidation of nitrite ion in nitrate melts on platinum electrodes
dc.typeArticulo
dc.typeArticulo


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