The electrochemical behavior of hydride ions at a Mo electrode in a LiBr-KBr-CsBr-LiH melt was studied by using cyclic voltammetry and chronopotentiometry. The resultant voltammograms and chronopotentiograms were classified as pertaining to a reversible system. The electron number was found to be equal to unity. It was noted that the hydride ion was anodically oxidized at around 0.50V (versus Li+/Li), and that pure H gas was generated according to the reaction: H- → ½H2 + e. By using voltammetry and chronopotentiometry, the diffusivity of the hydride ion was found to be described by,

D (cm2/s) = 1.2 x 10-1 exp[-45000/RT]

at 523 to 673K.

Electrochemical Behavior of Hydride Ion in a LiBr-KBr-CsBr Eutectic Melt. T.Kasajima, T.Nishikiori, T.Nohira, Y.Ito: Journal of the Electrochemical Society, 2003, 150[8], E403-8