Anode processes on Pt and ceramic anodes in chloride and oxide-chloride melts

Platinum anodes are widely used for metal oxides reduction in LiCl–Li 2 O, however high-cost and low-corrosion resistance hinder their implementation. NiO–Li O ceramics is an alternative corrosion resistant anode material. Anode processes on platinum were studied (80 mol.%)LiCl-(20mol.%)KCl mol.%)LiCl-(20 mol.%)KCl–Li melts by cyclic voltammetry, potentiostatic galvanostatic electrolysis. Experiments performed the LiCl–KCl melt without Li illustrate that a Pt dissolution causes 2+ ions formation at 3.14 V 550 ° С 3.04 650 о С. A two-stage oxidation was observed with 2.40 ÷ 2.43 V, which resulted PtO 3 formation. Oxygen current efficiency of 2.8 reached about 96%. The process electrode proceeds potentials more positive than 3.1 results electrochemical decomposition ceramic to NiO . close 100%. demonstrated good characteristics during electrolysis 0.25 A/cm 35 h may be successfully pyrochemical treating spent nuclear fuel.