The Electrolytic deposition of neptunium on the electrode surface

Ouchi, Kazuki  ; Otobe, Haruyoshi  ; Kitatsuji, Yoshihiro  

We investigated the behavior of deposition following the reduction of Np(V) as electrodeposition by measuring electrochemical quartz crystal microbalance in pH 34. Formation of Np deposits following the electrolytic reduction of Np (V) was confirmed at the more positive potential in the higher pH. From the relationship between the quantity of electricity of electrolytic reduction of Np(V) and the deposition in the pH 4 solution, we found that the specie of deposits is highly likely to be Np(IV) dioxide.