Half-cell potentials of semiconductive simple binary sulphides in aqueous solution

M. Sato

doi:10.1016/0013-4686(66)87046-9

Half-cell potentials of semiconductive simple binary sulphides in aqueous solution

Electrochimica Acta

By: M. Sato

https://doi.org/10.1016/0013-4686(66)87046-9

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Abstract

Theoretical consideration of the charge-transfer mechanism operative in cells with an electrode of a semiconductive binary compound leads to the conclusion that the half-cell potential of such a compound is not only a function of ionic activities in the electrolytic solution, but also a function of the activities of the component elements in the compound phase. The most general form of the electrode equation derived for such a compound with a formula M_iX_j which dissociates into M^j+ and Xⁱ⁻ ions in aqueous solution is

E_Mi_Xj = E_MiXj⁰ + $R T$ $2 ij$ ln [ $(sua M^{j+})_{aq}^{i} · (sua X)^{j} M_{i} X_{j}$ / $(sua X^{i−})_{aq}^{j} · (sua M)^{i} M_{i} X_{j}$ ],

where

E_Mi_Xj⁰ = $12$ (E_M,M^j+⁰ + E_Xⁱ⁻,_X).

The equation can be modified to other forms. When applied to semiconductive simple binary sulphides, these equations appear to give better descriptions of the observed electrode potentials of such sulphides than any other proposed equations.

Additional publication details
Publication type	Article
Publication Subtype	Journal Article
Title	Half-cell potentials of semiconductive simple binary sulphides in aqueous solution
Series title	Electrochimica Acta
DOI	10.1016/0013-4686(66)87046-9
Volume	11
Issue	3
Year Published	1966
Language	English
Publisher	Elsevier
Description	13 p.
First page	361
Last page	373
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