Kinetics of the discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodes
- Autores
- Arvia, Alejandro Jorge; Calandra, Alfredo J.
- Año de publicación
- 1967
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodes of known porosity has been studied in the temperature range 245–340° C. Conventional current/voltage curves, and build-up and decay of the working electrode potential, were determined. In the whole range of current density and temperature investigated the anodic process is characterized by a Tafel slope of 2RT/3F. Decay and Tafel slopes tend to coincide at the highest current densities. Electrode capacitance measurements at the initial potential suggest a roughness factor of about 50 for graphite electrodes. The results are interpreted in terms of the following reaction schemes: (Ia) NO2− + C ⇌ (NO2)C + e, (IIa) (NO2)C + NO2− → (N2O4) + C + e, (IIIa) (N2O4) ⇌ 2NO2, and (Ia) NO2− + C ⇌ (NO2)C + e, (IIb) (NO2)C → NO2+ + C + e, (IIIb) NO2+ + NO2− ⇌ (N2O2) ⇌ 2NO2, where either reaction (IIa) or (IIb) is the rate-determining step, assuming a low electrode surface coverage by reaction intermediates. Data from non-steady measurements are rather scattered and this is ascribed to probable diffusion of nitrogen dioxide through the porous electrode material.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas - Materia
-
Ciencias Exactas
Química
Nitrite ions
Electrolysis
Anodic process - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/121936
Ver los metadatos del registro completo
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Kinetics of the discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodesArvia, Alejandro JorgeCalandra, Alfredo J.Ciencias ExactasQuímicaNitrite ionsElectrolysisAnodic processThe discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodes of known porosity has been studied in the temperature range 245–340° C. Conventional current/voltage curves, and build-up and decay of the working electrode potential, were determined. In the whole range of current density and temperature investigated the anodic process is characterized by a Tafel slope of 2RT/3F. Decay and Tafel slopes tend to coincide at the highest current densities. Electrode capacitance measurements at the initial potential suggest a roughness factor of about 50 for graphite electrodes. The results are interpreted in terms of the following reaction schemes: (Ia) NO<sub>2</sub>− + C ⇌ (NO<sub>2</sub>)C + e, (IIa) (NO<sub>2</sub>)C + NO<sub>2</sub>− → (N<sub>2</sub>O<sub>4</sub>) + C + e, (IIIa) (N<sub>2</sub>O<sub>4</sub>) ⇌ 2NO<sub>2</sub>, and (Ia) NO<sub>2</sub>− + C ⇌ (NO<sub>2</sub>)C + e, (IIb) (NO<sub>2</sub>)C → NO<sub>2</sub>+ + C + e, (IIIb) NO<sub>2</sub>+ + NO<sub>2</sub>− ⇌ (N<sub>2</sub>O<sub>2</sub>) ⇌ 2NO<sub>2</sub>, where either reaction (IIa) or (IIb) is the rate-determining step, assuming a low electrode surface coverage by reaction intermediates. Data from non-steady measurements are rather scattered and this is ascribed to probable diffusion of nitrogen dioxide through the porous electrode material.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1967-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1441-1455http://sedici.unlp.edu.ar/handle/10915/121936enginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/0013468667800586info:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(67)80058-6info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:20:53Zoai:sedici.unlp.edu.ar:10915/121936Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:20:53.276SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Kinetics of the discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodes |
| title |
Kinetics of the discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodes |
| spellingShingle |
Kinetics of the discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodes Arvia, Alejandro Jorge Ciencias Exactas Química Nitrite ions Electrolysis Anodic process |
| title_short |
Kinetics of the discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodes |
| title_full |
Kinetics of the discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodes |
| title_fullStr |
Kinetics of the discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodes |
| title_full_unstemmed |
Kinetics of the discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodes |
| title_sort |
Kinetics of the discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodes |
| dc.creator.none.fl_str_mv |
Arvia, Alejandro Jorge Calandra, Alfredo J. |
| author |
Arvia, Alejandro Jorge |
| author_facet |
Arvia, Alejandro Jorge Calandra, Alfredo J. |
| author_role |
author |
| author2 |
Calandra, Alfredo J. |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
Ciencias Exactas Química Nitrite ions Electrolysis Anodic process |
| topic |
Ciencias Exactas Química Nitrite ions Electrolysis Anodic process |
| dc.description.none.fl_txt_mv |
The discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodes of known porosity has been studied in the temperature range 245–340° C. Conventional current/voltage curves, and build-up and decay of the working electrode potential, were determined. In the whole range of current density and temperature investigated the anodic process is characterized by a Tafel slope of 2RT/3F. Decay and Tafel slopes tend to coincide at the highest current densities. Electrode capacitance measurements at the initial potential suggest a roughness factor of about 50 for graphite electrodes. The results are interpreted in terms of the following reaction schemes: (Ia) NO<sub>2</sub>− + C ⇌ (NO<sub>2</sub>)C + e, (IIa) (NO<sub>2</sub>)C + NO<sub>2</sub>− → (N<sub>2</sub>O<sub>4</sub>) + C + e, (IIIa) (N<sub>2</sub>O<sub>4</sub>) ⇌ 2NO<sub>2</sub>, and (Ia) NO<sub>2</sub>− + C ⇌ (NO<sub>2</sub>)C + e, (IIb) (NO<sub>2</sub>)C → NO<sub>2</sub>+ + C + e, (IIIb) NO<sub>2</sub>+ + NO<sub>2</sub>− ⇌ (N<sub>2</sub>O<sub>2</sub>) ⇌ 2NO<sub>2</sub>, where either reaction (IIa) or (IIb) is the rate-determining step, assuming a low electrode surface coverage by reaction intermediates. Data from non-steady measurements are rather scattered and this is ascribed to probable diffusion of nitrogen dioxide through the porous electrode material. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas |
| description |
The discharge of nitrite ions in the electrolysis of molten nitrites on graphite electrodes of known porosity has been studied in the temperature range 245–340° C. Conventional current/voltage curves, and build-up and decay of the working electrode potential, were determined. In the whole range of current density and temperature investigated the anodic process is characterized by a Tafel slope of 2RT/3F. Decay and Tafel slopes tend to coincide at the highest current densities. Electrode capacitance measurements at the initial potential suggest a roughness factor of about 50 for graphite electrodes. The results are interpreted in terms of the following reaction schemes: (Ia) NO<sub>2</sub>− + C ⇌ (NO<sub>2</sub>)C + e, (IIa) (NO<sub>2</sub>)C + NO<sub>2</sub>− → (N<sub>2</sub>O<sub>4</sub>) + C + e, (IIIa) (N<sub>2</sub>O<sub>4</sub>) ⇌ 2NO<sub>2</sub>, and (Ia) NO<sub>2</sub>− + C ⇌ (NO<sub>2</sub>)C + e, (IIb) (NO<sub>2</sub>)C → NO<sub>2</sub>+ + C + e, (IIIb) NO<sub>2</sub>+ + NO<sub>2</sub>− ⇌ (N<sub>2</sub>O<sub>2</sub>) ⇌ 2NO<sub>2</sub>, where either reaction (IIa) or (IIb) is the rate-determining step, assuming a low electrode surface coverage by reaction intermediates. Data from non-steady measurements are rather scattered and this is ascribed to probable diffusion of nitrogen dioxide through the porous electrode material. |
| publishDate |
1967 |
| dc.date.none.fl_str_mv |
1967-10 |
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http://sedici.unlp.edu.ar/handle/10915/121936 |
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eng |
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eng |
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