Electrochemical Cell Design for Emf Measurements of Liquid Nd-Bi Alloys via Coulombic Titration in LiCl–KCl–NdCl3 Electrolyte

Using an electrochemical cell containing a two-phase Nd-Sn alloy (xNd = 0.10) in LiCl–KCl–NdCl3 (1 mol%) as a reference electrode, coulometric titration emf measurements at various cathodic current densities (10–100 mA cm−2) were performed to evaluate the stability of the Nd-Sn electrode and corroborate emf values for Nd (in Bi) at T = 873 K. The potential difference between two identical Nd-Sn reference electrodes was measured before/after the electrochemical evaluation for 45 days, and the stability of the cell for the long-term operation was verified. The emf values of Nd (in liquid Bi) titrated at various current densities were consistent at each Nd concentration, demonstrating the reliability of the cell.