Electrochemical properties of yttrium on W and Pb electrodes in LiCl-KCl eutectic melts

Cyclic voltammetry, square wave voltammetry, linear polarization, chronopotentiometry and chronoamperometry were performed to investigate the electrochemical properties of Y(iii) on W and Pb electrodes in LiCl–KCl eutectic melts. The diffusion coefficient of Y(iii) measured by various techniques was in the order of 10⁻⁵. The nucleation of Y on W electrode was found to comply with the instantaneous nucleation mechanism. With increasing temperature, the exchange current densities increased and the charge-transfer resistances decreased, and exchange current densities are distinctly larger on liquid Pb electrode compared with W electrode. In addition, the co-deposition mechanism of Y(iii) and Pb(ii) on W electrode was also studied and four Pb–Y intermetallics could be detected. The feasibility of extraction metallic Y from the melts was explored by co-deposition on W electrode and under-potential deposition on liquid Pb electrode and the extracted products consisted of Pb₃Y and Pb phases.

Cyclic voltammetry, square wave voltammetry, linear polarization, chronopotentiometry and chronoamperometry were performed to investigate the electrochemical properties of Y(iii) on W and Pb electrodes in LiCl–KCl eutectic melts.

Electrochemical formation and thermodynamic properties of Tb–Bi intermetallic compounds in eutectic LiCl–KCl

The electrochemical formation and thermodynamic properties of Tb–Bi intermetallic compounds were investigated on a Bi film electrode in eutectic LiCl–KCl.

Estimation of the composition of intermetallic compounds in LiCl–KCl molten salt by cyclic voltammetry

In this work, the compositions of Ce–Al, Er–Al and La–Bi intermetallic compounds were estimated by the cyclic voltammetry (CV) technique. At first, CV measurements were carried out at different reverse potentials to study the co-reduction processes of Ce–Al, Er–Al and La–Bi systems. The CV curves obtained were then re-plotted with the current as a function of time, and the coulomb number of each peak was calculated. By comparing the coulomb number of the related peaks, the compositions of the Ce–Al, Er–Al and La–Bi intermetallic compounds formed in the co-reduction process could be estimated. The results showed that Al₁₁Ce₃, Al₃Ce, Al₂Ce and AlCe could be formed by the co-reduction of Ce(iii) and Al(iii). For the co-reduction of Er(iii) and Al(iii), Al₃Er₂, Al₂Er and AlEr were formed. In a La(iii) and Bi(iii) co-existing system in LiCl–KCl melts, LaBi₂, LaBi and Li₃Bi were the major products as a result of co-reduction.