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

The 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 proc...

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Autores principales: Martins, María Elisa, Calandra, Alfredo J., Arvia, Alejandro Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 1970
Materias:
Ciencias Exactas
Química
Electrochemical oxidation
Platinum
Kinetic parameters
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/121502
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-121502
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Electrochemical oxidation
Platinum
Kinetic parameters
spellingShingle Ciencias Exactas
Química
Electrochemical oxidation
Platinum
Kinetic parameters
Martins, María Elisa
Calandra, Alfredo J.
Arvia, Alejandro Jorge
Kinetics and mechanism of anodic oxidation of nitrite ion in nitrate melts on platinum electrodes
topic_facet Ciencias Exactas
Química
Electrochemical oxidation
Platinum
Kinetic parameters
description The 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.
format Articulo
Articulo
author Martins, María Elisa
Calandra, Alfredo J.
Arvia, Alejandro Jorge
author_facet Martins, María Elisa
Calandra, Alfredo J.
Arvia, Alejandro Jorge
author_sort Martins, María Elisa
title Kinetics and mechanism of anodic oxidation of nitrite ion in nitrate melts on platinum electrodes
title_short Kinetics and mechanism of anodic oxidation of nitrite ion in nitrate melts on platinum electrodes
title_full Kinetics and mechanism of anodic oxidation of nitrite ion in nitrate melts on platinum electrodes
title_fullStr Kinetics and mechanism of anodic oxidation of nitrite ion in nitrate melts on platinum electrodes
title_full_unstemmed Kinetics and mechanism of anodic oxidation of nitrite ion in nitrate melts on platinum electrodes
title_sort kinetics and mechanism of anodic oxidation of nitrite ion in nitrate melts on platinum electrodes
publishDate 1970
url http://sedici.unlp.edu.ar/handle/10915/121502
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AT calandraalfredoj kineticsandmechanismofanodicoxidationofnitriteioninnitratemeltsonplatinumelectrodes
AT arviaalejandrojorge kineticsandmechanismofanodicoxidationofnitriteioninnitratemeltsonplatinumelectrodes
bdutipo_str Repositorios
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