Acid-base reaction of Li3CrO4 with divalent metal ions in molten lithium chloride-potassium chloride eutectic

doi:10.1016/0022-1902(77)80009-2

Journal of Inorganic and Nuclear Chemistry

Volume 39, Issue 2, 1977, Pages 255-258

https://doi.org/10.1016/0022-1902(77)80009-2 Get rights and content

Abstract

A disproportionation reaction of Li₃CrO₄, which is considered to be the intermediate in the electrochemical reduction of chromate, was studied in the presence of various divalent cations in molten LiClKCl eutectic at 450°C, Li₃CrO₄ decomposes to CrO₄²⁻ and LiCrO₂ as a solid product in the presence of Ca(II) and Cd(II) ions. On the other hand in the presence of Zn(II), Mg(II) and Ni(II) ions the composition of the products varies with the nature of the cation. The composition approaches a compound Li_xM(II)_yCrO₄ (x + 2y = 5, M(II) = Zn, Mg and Ni) with increasing acidity of cations and with decreasing acidity the product becomes a mixture of Li_xM(II)_yCrO₄ and LiCrO₂. This composition change can be explained in terms of an acid-base reaction of Li₃CrO₄ and the cations.

References (10)

K Niki et al.
J. Inorg. Nucl. Chem.
(1975)
H.A Laitinen et al.
Anal. Chem.
(1967)
J.H Propp et al.
Anal. Chem.
(1969)
B Popov et al.
J. Electrochem. Soc.
(1970)
K.W Hanck et al.
J. Electrochem. Soc.
(1971)

There are more references available in the full text version of this article.

Cited by (2)

Pulse polarography of uranyl(VI) in molten LiClKCl eutectic
1981, Journal of Inorganic and Nuclear Chemistry
The electrochemical characterization of redox couple UO₂²⁺/UO₂⁺ in LiClKCl eutectic at 450°C has been carried out with normal pulse polarography on Pt, Au, tin oxide and glassy carbon electrodes. Pt and Au electrodes immersed in the melt containing UO₂²⁺ result in mixed potential systems, being corroded considerably with the simultaneous reduction of UO₂²⁺ at the open potentials. While the latter two electrodes give well-defined, two steps reduction waves; the first one is a reversible, one-electron transfer with $E_{12} = −0.487 ± 0.005 V$ vs 1M Pt(II)/Pt, and the second wave, whose onset potential largely depends on the kind of electrode, is ascribed to a succeeding one-electron transfer yielding UO₂ deposits. Pulse polarography on GCE, which has the largest nucleation overvoltage among them, was proved suitable for detection of the intermediate UO₂⁺.
Discharge Characteristics of Lithium-Boron Alloy Anode in Molten Salt Thermal Cells
1982, Journal of the Electrochemical Society

^†: Department of Applied Chemistry, Faculty of Engineering, Tohoku University, Sendai, Japan.

View full text

Acid-base reaction of Li3CrO4 with divalent metal ions in molten lithium chloride-potassium chloride eutectic

Abstract

J. Inorg. Nucl. Chem.

Anal. Chem.

Anal. Chem.

J. Electrochem. Soc.

J. Electrochem. Soc.

Acid-base reaction of Li₃CrO₄ with divalent metal ions in molten lithium chloride-potassium chloride eutectic