Electrode reaction of Pu3+/Pu couple in LiCl-KCl eutectic melts: Comparison of the electrode reaction at the surface of liquid Bi with that at a solid Mo electrode
O. Shirai et al., Electrode reaction of Pu3+/Pu couple in LiCl-KCl eutectic melts: Comparison of the electrode reaction at the surface of liquid Bi with that at a solid Mo electrode, ANAL SCI, 17(1), 2001, pp. 51-57
The electrode reaction of Pu3+/Pu couple at the interface between LiCl-KCl
eutectic melt containing PuCl3 and liquid Bi phase was investigated by cycl
ic voltammetry at 723, 773 and 823 K. For comparison, the system was also s
tudied using a solid Mo electrode in place of the liquid Bi electrode. It w
as found that the electrode reaction of Pu3+/Pu couple at the Bi electrode
was almost reversible. The redox potentials of Pu3+/Pu couple at the liquid
Bi electrode in the LiCl-KCl eutectic melt containing 0.87 wt% PuCl3 (0.00
14 mole fraction) at 723, 773 and 823 K were observed to be more positive b
y 0.575, 0.572 and 0.566 V, respectively, than those at the Mo electrode, T
hese differences in potential were thermodynamically analyzed by assuming a
lowering of the activity of Pu in Bi phase according to the alloy formatio
n of PuBi2.