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Article | REF: BN3520 V2

Chemistry of Actinides. Complexes and Solids in Aqueous Medias

Author: Thomas VERCOUTER

Publication date: August 10, 2021

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3. Redox potentials of actinides

3.1 Context

It is essential to define the domains of existence of each oxidation state, defined by the redox potentials of each couple. The potential values given below are expressed relative to a standard hydrogen electrode (V/ESH).

The reduction potential of the An 3+ /An couple is very negative, between -1.7 and -2.1 V depending on the actinide: an An actinide metal is oxidized in an acid solution to the An 3+ ion where it is dissolved :

An(s)+3H+ (aq)↔An3+ (aq)+32H2 ( g)
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Redox potentials of actinides
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