NDLI: Electrode reaction of the Np$^{3+}$/Np couple at liquid Cd and Bi electrodes in LiCl

Content Provider	Springer Nature Link
Author	Shirai, O. Uozumi, K. Iwai, T. Arai, Y.
Copyright Year	2004
Abstract	The electrode reactions of the Np$^{3+}$/Np couple at liquid Cd and Bi electrodes were investigated by cyclic voltammetry at 723, 773 and 823 K in the LiCl–KCl eutectic melt. It was found that the diffusion of Np$^{3+}$ in the salt phase was the rate-determining step in the cathodic reaction when the concentration of NpCl$_{3}$ was less than about 1 wt % and the liquid Cd or Bi phase was not saturated with Np. The redox potentials of the Np$^{3+}$/Np couple at the liquid Cd electrode at 723, 773 and 823 K were observed to be more positive than those at the Mo electrode by 0.158, 0.140 and 0.126 V, respectively. The potential shift results from a lowering of the activity of Np in the Cd phase according to the formation of the NpCd$_{11}$ alloy at 723 K and NpCd$_{6}$ at 773 and 823 K. The redox potentials of the Np$^{3+}$/Np couple at the liquid Bi electrode at 723, 773 and 823 K were more positive than those at the Mo electrode by 0.427, 0.419 and 0.410 V, respectively, which is attributable to a lowering of the activity of Np in the Bi phase due to the formation of NpBi$_{2}$.
Starting Page	323
Ending Page	330
Page Count	8
File Format	PDF
ISSN	0021891X
Journal	Journal of Applied Electrochemistry
Volume Number	34
Issue Number	3
e-ISSN	15728838
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2004-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Physical Chemistry Industrial Chemistry/Chemical Engineering Electrochemistry
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Chemical Engineering Electrochemistry

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