This work presents the electrochemical study of NdCl3 solutions in fused low-melting LiCl-KCl-CsCl eutectic and individual CsCl at the temperature range 573-943 K using inert molybdenum electrodes. The mechanism of the electrochemical reduction was investigated by transient electrochemical technique. It has been shown that Nd3+ ions are reduced to metallic neodymium through two consecutive steps: Nd3+ + (e) over bar -> Nd2+ and Nd2+ + 2 (e) over bar -> Nd-0. The chemical stability of Nd2+ ions in fused chloride melts was studied at different temperatures. It was determined that the compound NdCl2 is not stable in molten solutions at high temperatures (above 810-840 K). The results of a study of the Nd3+/Nd2+ couple redox potentials vs. Cl-/Cl-2 reference electrode at a wide temperature range in molten LiCl-KCl-CsCl eutectic was carried out by direct potentiometric method. Apparent standard redox potentials of the couple E*(Nd3+/Nd2+) were determined. Basic thermodynamic N properties of the reaction NdCl2(l) + 1/2Cl(2(g)) reversible arrow NdCl3(l) were calculated. (C) 2012 Elsevier Ltd. All rights reserved.