Electrochemical behavior of yttrium ion in LiCl-KCl-NaCl eutectic melt

Journal Article · Wed Jul 01 00:00:00 EDT 1992 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2069504· OSTI ID:7131340

Hikino, S; Xie, G; Ema, K; Ito, Y ^[1]; Shou, Z M ^[2]

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1. Dept. of Nuclear Engineering, Faculty of Engineering, Kyoto Univ., Sakyo-ku, Kyoto 606 (JP)
2. Changchun Inst. of Applied Chemistry, Academia Sinica, Changchun 130022 (CN)

This paper reports that the electrochemical reduction of yttrium ion on a molybdenum electrode in a LiCl-LCl-NaCl eutectic melt at 723 K was found to be almost reversible and to proceed by a one-step three electron reaction. The diffusion coefficient D of the Y(III) ion was measured to be (3.3 {plus minus} 0.4) {times} 10{sup {minus}6} cm{sup 2}s{sup {minus}1} by cyclic voltammetry, (5.0 {plus minus} 0.9) {times} 10{sup {minus}6} cm{sup 2}s{sup {minus}1} by the rotating disk electrode method, and (7.1 {plus minus} 0.7) {times} 10{sup {minus}6} cm{sup 2}s{sup {minus}1} by chronopotentiometry. The D values obtained by the latter two methods are in fairly good agreement with each other. The rather low D value obtained by cyclic voltammetry might be attributed to the fact that yttrium metal can dissolve slightly in the chloride melt. The standard potential of Y(III)/Y(0) coupled was determined to be ({minus}3.174 {plus minus} 0.006) V (vs. Cl{sub 2}/Cl{sup {minus}}) by open-circuit potentiometry, ({minus}3.15 {plus minus} 0.02) V (vs. Cl{sub 2}Cl{sup {minus}}) by the totaling disk electrode method and ({minus}3.16) {plus minus} 0.02) V (vs. Cl{sub 2}/Cl{sup {minus}}) by chronopotentiometry. These three values are in good agreement with each other. Several types of Ni-Y intermetallic compounds were found to be formed on a nickel electrode.

• OSTI ID: 7131340
• Journal Information: Journal of the Electrochemical Society; (United States), Vol. 139:7; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
LITHIUM CHLORIDES
ELECTROCHEMISTRY
MOLYBDENUM
POTASSIUM CHLORIDES
ELECTRODES
SODIUM CHLORIDES
YTTRIUM IONS
REDUCTION
DIFFUSION
EUTECTICS
LIQUIDS
MELTING
POTENTIOMETRY
TEMPERATURE RANGE 0400-1000 K
VOLTAMETRY
ALKALI METAL COMPOUNDS
CHARGED PARTICLES
CHEMICAL REACTIONS
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
ELEMENTS
FLUIDS
HALIDES
HALOGEN COMPOUNDS
IONS
LITHIUM COMPOUNDS
LITHIUM HALIDES
METALS
PHASE TRANSFORMATIONS
POTASSIUM COMPOUNDS
SODIUM COMPOUNDS
TEMPERATURE RANGE
TITRATION
TRANSITION ELEMENTS
400400* - Electrochemistry