Voltammetric studies of tantalum electrodeposition baths

Neodymium and gadolinium extraction from molten fluorides by reduction on a reactive electrode

“…The study showed that Nd(III) and Gd(III) could be reduced by alloying with the cathodic material (Cu or Ni) at far more anodic potentials than on an inert cathode; this so-called 'depolarization effect'allows the theoretical extraction efficiency of these lanthanides to be enhanced up to 100%. Concerning the titration of Ln ions during electrolysis, previous studies in our laboratory, showed that square wave voltammetry (SWV) is a suitable technique to monitor the electroactive species content of molten fluoride media [16,17]. Consequently, as the lanthanide ion concentration decreases during extraction runs, SWV can be used to check the Nd(III) and Gd(III) contents without sampling the molten solution.…”

Co-reduction of aluminium and lanthanide ions in molten fluorides: Application to cerium and samarium extraction from nuclear wastes

“…The cell was heated using a programmable furnace and the temperature was measured using a chromel-alumel thermocouple. A more detailed description of the device can be found in previous papers of our laboratory such as the one referred in [9]. …”

Electrochemical reduction of Gd(III) and Nd(III) on reactive cathode material in molten fluoride media

“…The cell was placed under argon atmosphere (U grade, less than 5 ppm O 2 ). A more detailed description of the device is given in refs [8,9]. The solvent used in the electrolytic bath was the eutectic LiF/CaF 2 (Merck 99.99%) (79.5/20.5 molar percent), with a melting point of 762°C.…”