Change of electrochemical impedance spectra of electrodeposited actinide compounds

Ouchi, Kazuki  ; Otobe, Haruyoshi  ; Kitatsuji, Yoshihiro  

We analyzed electrodeposited U(IV) compounds on the electrode surface with electrochemical impedance spectroscopy. Impedance spectra of U deposits on the electrode surface were observed Nyquist plot semicircles, and these semicircles grew with the increase of deposition amount. This indicates that these semicircles are originated from U deposits. The obtained electrical resistances of U deposits were increased with time. This phenomenon indicates that electrodeposits of U deposits had been transfered into oxide with high electrical resistance.