Steady-state and transient galvanostatic studies have been made on the anodic dissolution of liquid gallium in pure and mixed solutions of hydrochloric acid and potassium chloride at 50Β°C. The results indicate that fast ion-transfer is followed by rate-determining electron-transfer (redox control),
Anodic dissolution of liquid gallium in alkaline solutions
β Scribed by T. Hurlen
- Publisher
- Elsevier Science
- Year
- 1964
- Tongue
- English
- Weight
- 260 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0013-4686
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β¦ Synopsis
The steady-state anodic dissolution of liquid gallium in pure and mixed solutions of sodium hydroxide and potassium chloride at 50Β°C has been studied by a slow galvanostatic technique. With increasing current density, the Tafel slope increases from 215 to 213 of 2.303 RTIF, and the hydroxyl-ion interaction exponent simultaneously decreases from 4 to 3 or lower. The chloride ion has no specific effect on the active dissolution reaction in alkaline solutions. Comparisons are made to data in acid chloride solutions, and a reaction scheme is suggested. R&m&-Etude galvanostatique de la dissolution anodique de Ga liq. en rkgime stationnaire, dans des solutions, pures ou m&es, de NaOH et KOH ?I 50Β°C. Quand la densit de courant s'accroit, la pente de Tafel passe de # % # (2,303 RT/F) et l'exposant d'interaction de OH-dkroit conjointement de 4 ii 3 ou encore moins. Cl-n'a pas d'effet spkcifique. Comparaison B la dissolution anodique dam des solutions HCl et proposition d'un schema rkactionnel. Zusammenfassung-Die station&e anodische Auflijsung von fliissigem Gallium in reinen und gemischten LBsungen von Natronlauge und Kaliumchlorid bei 50Β°C wurde mittels einer langsamen galvanostatischen Methode untersucht. Mit zunehmender Stromdichte nimmt die Tafel-Steiwng zu von f auf 8 von 2,303 RTIF, und der Exponent der Hydroxylionen-Wechselwirkung nirnmt gliichr zeitig von 4 auf 3 oder weniger ab. Das Chloridion hat keine snezifische Wirkune auf die aktive Aufl&ungsreaktion in alkaliszher Liisung. Es werden Vergleiche ingestellt mit denbaten in saurer Chloridl&ung, und des weiteren wird ein Reaktionsschema vorgeschlagen.
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