Electrochemical oxidation of 243Am(III) in nitric acid by a terpyridyl-derivatized electrode
Article
Dares, CJ, Lapides, AM, Mincher, BJ et al. (2015). Electrochemical oxidation of 243Am(III) in nitric acid by a terpyridyl-derivatized electrode
. SCIENCE, 350(6261), 652-655. 10.1126/science.aac9217
Dares, CJ, Lapides, AM, Mincher, BJ et al. (2015). Electrochemical oxidation of 243Am(III) in nitric acid by a terpyridyl-derivatized electrode
. SCIENCE, 350(6261), 652-655. 10.1126/science.aac9217
Selective oxidation of trivalent americium (Am) could facilitate its separation from lanthanides in nuclear waste streams. Here, we report the application of a high-surfacearea, tin-doped indium oxide electrode surface-derivatized with a terpyridine ligand to the oxidation of Am(III) to Am(V) and Am(VI) in nitric acid. Potentials as low as 1.8 volts (V) versus the saturated calomel electrode were applied, 0.7 V lower than the 2.6 V potential for one-electron oxidation of Am(III) to Am(IV) in 1 molar acid. This simple electrochemical procedure provides a method to access the higher oxidation states of Am in noncomplexing media for the study of the associated coordination chemistry and, more important, for more efficient separation protocols.
