Kinetics of oxygen formation and dissolution on platinum electrodes in the electrolysis of molten potassium bisulphate
The kinetics of electrochemical formation and dissolution of oxygen in the electrolysis of molten potassium bisulphate in the temperature range of ca 230–330°C has been studied. The potentiostatic and galvanostatic polarization curves at high overvoltages fit a Tafel equation. The anodic slope is RT...
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| Autores principales: | , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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1968
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/121843 |
| Aporte de: |
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I19-R120-10915-121843 |
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dspace |
| institution |
Universidad Nacional de La Plata |
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I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Química Kinetics Oxygen Molten potassium bisulphate |
| spellingShingle |
Ciencias Exactas Química Kinetics Oxygen Molten potassium bisulphate Arvia, Alejandro Jorge Calandra, Alfredo J. Videla, Héctor A. Kinetics of oxygen formation and dissolution on platinum electrodes in the electrolysis of molten potassium bisulphate |
| topic_facet |
Ciencias Exactas Química Kinetics Oxygen Molten potassium bisulphate |
| description |
The kinetics of electrochemical formation and dissolution of oxygen in the electrolysis of molten potassium bisulphate in the temperature range of ca 230–330°C has been studied. The potentiostatic and galvanostatic polarization curves at high overvoltages fit a Tafel equation. The anodic slope is RT/F, and the cathodic slope RT/2F. At low anodic overvoltages oxide-film formation seems to occur on the platinum. In the cathodic overvoltage region dissolution of oxygen occurs with a well defined limiting cd related to the amount of oxygen dissolved in the melt. Non-steady measurements for the anodic reaction yield kinetic parameters which coincide with those obtained from polarization curves. Experimental capacitances have reasonable low values. Anodic results are discussed in terms of the discharge of sulphate or bisulphate ions on a totally oxidized platinum surface, the rate-determining step being a two-electron transfer. The cathodic reactions comprise a diffusion process related to oxygen dissolution and the already known electrochemical formation of hydrogen. |
| format |
Articulo Articulo |
| author |
Arvia, Alejandro Jorge Calandra, Alfredo J. Videla, Héctor A. |
| author_facet |
Arvia, Alejandro Jorge Calandra, Alfredo J. Videla, Héctor A. |
| author_sort |
Arvia, Alejandro Jorge |
| title |
Kinetics of oxygen formation and dissolution on platinum electrodes in the electrolysis of molten potassium bisulphate |
| title_short |
Kinetics of oxygen formation and dissolution on platinum electrodes in the electrolysis of molten potassium bisulphate |
| title_full |
Kinetics of oxygen formation and dissolution on platinum electrodes in the electrolysis of molten potassium bisulphate |
| title_fullStr |
Kinetics of oxygen formation and dissolution on platinum electrodes in the electrolysis of molten potassium bisulphate |
| title_full_unstemmed |
Kinetics of oxygen formation and dissolution on platinum electrodes in the electrolysis of molten potassium bisulphate |
| title_sort |
kinetics of oxygen formation and dissolution on platinum electrodes in the electrolysis of molten potassium bisulphate |
| publishDate |
1968 |
| url |
http://sedici.unlp.edu.ar/handle/10915/121843 |
| work_keys_str_mv |
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Repositorios |
| _version_ |
1764820448969752577 |