language: en

Electrochemical Behavior of Ba^'*' at Liquid Metal Cathodes in Molten Chlorides

Masahiko Matsumiya, Masatoshi Takano, Ryuzo Takagi^, and Reiko Fujita^
Japan Atomic Energy Research Insdtute,
Tokai-mura, Naka-gun, Ibaraki-ken, 319-1195, Japan
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology ,
O-okayama, Meguro-ku, Tokyo 152-8550
^ Nuclear Engineering Laboratory, Toshiba Corporadon ,
Ukishima-cho, Kawasaki-ku, Kawasaki 210-0862

[Reprint requests to Prof. M. M.; Fax: 81 29 2825922]

E-mail: matsumiya@molten.tokai.jaeri.go.jp Z. Naturforsch. 54 a, 739-746 (1999);

[received September 13, 1999]

The electrochemcal behavior of Ba^"" on several liquid metal electrodes (Al, Bi, Cd, Pb, Sn and Zn) in a NaCl-KCl equimolar solvent at 1000 K has been invesUgated by means of cyclic voltammetry and chronopotentiometry. The kinetic parameters and the diffusion coefficient for Ba^^ were determined by cyclic voltammetry widi conventional, semi-integral, semi-differential methods and chronopotentiometry. It was revealed diat on a liquid Pb electrode in the NaCl-KCl system at 1000 K the quasi-reversible cathodic reaction Ba^"" + 2e~ + Pb BaPb takes place. In addition, the kinetic parameters and die diffusion coefficient agree well widi die values determined by various electroanalyses. The possibility of alloy formation between Ba and Sn was also demonsUated in this paper.

Key words: Alloy Formation Reaction; Barium; Liquid Metal Cadiodes; Molten Salts.

1. Introduction