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Rotating ring disk electrode in molten chloride

✍ Scribed by Hideki Yabe; Keiko Ema; Yasuhiko Ito

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 380 KB
Volume: 34
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(89)87191-9

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✦ Synopsis

A rotating ring disk electrode (rrde) assembly for use in molten chloride at 723 K has been constructed. The electrode is made of nickel and high purity alumina. The rotating electrode sealing is made of glass cloth. By the use of this rotating ring disk electrode, cathodic reduction of CdCI, in molten LiCI-KC1 eutectic melt at 723 K has been investigated in detail. The rotating ring disk system voltammograms have been obtained at rotation velocities of SO&3000 'pm and composition ranging from 0.002 to 0.1 M. As a result of n-de experiments, the existence of monovalent cadmium ion has been confirmed in LiCI-KCl. The standard potential of Cd(II)/Cd(O) is 1.98 50.07 V, and that of Cd(II)/Cd(I) is 2.3 +O. 1 V us Li/Li + , respectively. From the dependence of the limiting current on the rotation velocity and concentration a diffusion coefficient of Cd(H) ion has been estimated to be D,,,,,, = 2.1 (k 0.3) x lo-5 cm% i (2.1( + 0.3) , x 10-9 m*s-').

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