The Electroreduction of Gadolinium and Dysprosium Ions in Equimolar NaCl-KCl Melt

Abstract

The mechanism of rare earth metals (Gd and Dy) chloride complexes electroreduction on the tungsten electrode in equimolar NaCl-KCl melt at 973 K has been studied by linear and cyclic voltammetry. Some kinetic parameters of processes were calculated. It was shown that the tungsten electrode was indifferent to gadolinium and dysprosium which were reduced on the surface. We found that the discharge mechanism of gadolinium and dysprosium chloride complexes was described by three-electron step when the steady-state conditions of polarization were limited by the mass transfer stage. The conditions of nonstationary polarization made the slowness of the charge transfer stage. The diffusion coefficient of gadolinium and dysprosium ions was calculated, the diffusion coefficient of ions was (0.9, and for ions, it was (1.60 ± 0.2) × 10 −5 сm 2 ·s DyCl −

Capillary Imbibition of Gadolinium Halides into WS2 Nanotubes: a Molecular Dynamics View

“…They are in excellent agreement with available electrochemical data. Particularly, D (Gd)=9×10 −6 cm 2 s −1 is found in the equimolar NaCl‐GdCl 3 melt at 973 K, D (Gd)=12.8×10 −6 cm 2 s −1[36] at 873 K, and D (Gd)≈86×10 −6 cm 2 s −1[37] at 1300 K for GdCl 3 highly diluted in LiCl‐KCl eutectic.…”

Mechanism of Dy3+ and Nd3+ Ions Electrochemical Coreduction with Ni2+, Co2+, and Fe3+ Ions in Chloride Melts

“…We previously studied the electroreduction of the Nd 3+ and Dy 3+ ions in the KCl-NaCl melt on the active electrode materials (Ag, Pt, and GC) using DyCl 3 and NdCl 3 obtained via dewatering of NdCl 3 ·6H 2 O and DyCl 3 ·6H 2 O by dehydrating agents NH 4 Cl and CCl 4 [ 26 , 27 , 28 ]. Experimental conditions and purity of the used reagents as well as the material of the electrode have a great impact on the structure, state, and electrochemical behavior of the Nd 3+ and Dy 3+ ions in chloride melts.…”

Thermal neutron flux monitors based on vibrating wire

“…[30]). An alternative possibility is electrodeposition of gadolinium on tungsten electrodes in equimolar NaCl-KCl melt at 973 K [31] or in the molten LiCl-KCl eutectics [32]. According to the recommendation in [33] we intend to use a solution of GdCl 3 in LiClb (molar 59.5%)-KCl eutectic at 359 1C.…”