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1975•Sov. Radiochem. (Engl. Transl.); (United States)Requires access

Electrochemical reduction of americium in acetonitrile medium

B. F. Myasoedov, Yu. M. Kulyako, I.S. Sklyarenko

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Abstract

The electrochemical reduction of americium in acetonitrile medium was investigated. On the basis of the data obtained and a comparison of them with the results of a study of the mechanism of the reduction of rare-earth elements, it was suggested that americium is reduced through the divalent state. Unstable Am/sup 2 +/ cations are oxidized by the water contained in the solvent, with the formation of the hydrolyzed form of trivalent americium. The reduction of the latter ends in the liberation of a precipitate of a basic salt with composition Am(OH)/sub 2/./sub 6/(ClO/sub 4/)/sub 0/./sub 4/. The formal redox potential of the couple Am(III)/Am(II) in acetonitrile, equal to -1.55 V, was estimated.

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The electrochemical reduction of americium in acetonitrile medium was investigated. On the basis of the data obtained and a comparison of them with the results of a study of the mechanism of the reduction of rare-earth elements, it was suggested that americium is reduced through the divalent state. Unstable Am/sup 2 +/ cations are oxidized by the water contained in the solvent, with the formation of the hydrolyzed form of trivalent americium. The reduction of the latter ends in the liberation of a precipitate of a basic salt with composition Am(OH)/sub 2/./sub 6/(ClO/sub 4/)/sub 0/./sub 4/. The formal redox potential of the couple Am(III)/Am(II) in acetonitrile, equal to -1.55 V, was estimated.

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Available abstract

The electrochemical reduction of americium in acetonitrile medium was investigated. On the basis of the data obtained and a comparison of them with the results of a study of the mechanism of the reduction of rare-earth elements, it was suggested that americium is reduced through the divalent state. Unstable Am/sup 2 +/ cations are oxidized by the water contained in the solvent, with the formation of the hydrolyzed form of trivalent americium. The reduction of the latter ends in the liberation of a precipitate of a basic salt with composition Am(OH)/sub 2/./sub 6/(ClO/sub 4/)/sub 0/./sub 4/. The formal redox potential of the couple Am(III)/Am(II) in acetonitrile, equal to -1.55 V, was estimated.

Key concepts: Americium, Acetonitrile, Chemistry, Inorganic chemistry, Electrochemistry, Divalent, Cationic polymerization, Hydrolysis

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