Electrochemical behaviour of nickel electrodes in molten potassium nitrate with increased basicity

✍ Scribed by S. Sternberg; C. Ghiga; T. Vişan

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 516 KB
• Volume: 36
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(91)85154-y

✦ Synopsis

The electrochemical behaviour of Ni electrodes in a KNO, melt in the 350400°C temperature range has been studied, using the cyclic voltammetry method. The occurrence of an additional anodic double-peak is attributed to some ionic species of nickelite (NiO:-) and nickelate (NiO;) type, of a very different electrochemical stability. The decrease of the KNO, local basicity, in the presence of Na+ and NO; ions, leads to the disappearance of the anodic double peak. The influence of scan rate and temperature on the anodic branch of the cyclovoltammograms is also discussed.