The electrochemical oxidation of nitrite ion dissolved as sodium nitrite in dimethylsulphoxide on a rotating platinum disk electrode, in the temperature range 2544°C is reported. Main reaction products are NO\*. NO, NiO. and dimethylsulphone. The anodic E/I curve shows a limiting current which is di
Kinetics and mechanism of the electrochemical oxidation of nitrite ion dissolved as sodium nitrite in dimethylsulphoxide solutions on platinum electrodes
✍ Scribed by J.A. Wargon; A.J. Arvía
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 993 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
The kinetics of the electrochemical oxidation of NO,-ion dissolved in DMSO has been studied on Pt electrodes at temperature ranging from 25 to 44'C, by means of potentiostatic E/Icurves and by relaxation techniques. The oxidation reaction is explained in terms of a consecutive reaction scheme which involves, as rate-determining step, nitrite-ion discharge on an adsorbed intermediate at the reaction interface, the latter apparently obeying a Langmuir isotherm. Rhsum&On a &udie la cinttique de la reaction 6Iectrochimique de I'ion NOI-dissous dans du DMSO sur des anodes de Pt a des temperatures compris entre 25 et 44°C. Les resultats furent obtenus avec dcs differcntes techniques. On a interpret6 ces r&&tats au moyen d'un mecanisme de reactions consecutifs comportant comme &ape regulatrice une reaction du type ion plus radical adsorb6e sur Ia surface de reaction. ZusammenfassunS-Es wurde die anodische Entladung von Nitrition am Platinelektroden in NaNOa-DMSO-Losungen untersucht. Dabei wurde nach verschiedenen experimentellen Methoden vorgegangen-Die Interpretation den experimentellen Ergebnissen wird ein Reaktionsmechanismus vorgesch-Iagen, bei dem die elektrochemische Reaktion von Nitrition mit einem adsorbierten Radikal des gcschwindigkeitsbestimmende Schritt ist.
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