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Title: Electrochemical oxidation of 243Am(III) in nitric acid by a terpyridyl-derivatized electrode

Abstract

A high surface area, tin-doped indium oxide electrode surface-derivatized with a terpyridine ligand has been applied to the oxidation of trivalent americium to Am(V) and Am(VI) in nitric acid. Potentials as low as 1.8 V vs. the saturated calomel electrode are used, 0.7 V lower than the 2.6 V potential for one-electron oxidation of Am(III) to Am(IV) in 1 M acid. This simple electrochemical procedure provides, for the first time, a method for accessing the higher oxidation states of Am in non-complexing media for developing the coordination chemistries of Am(V) and Am(VI) and, more importantly, for separation of americium from nuclear waste streams.

Authors:
; ; ;
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1248209
Report Number(s):
INL/JOU-15-35686
Journal ID: ISSN 0036-8075
DOE Contract Number:  
DE-AC07-99ID13727
Resource Type:
Journal Article
Journal Name:
Science
Additional Journal Information:
Journal Volume: 350; Journal Issue: 6261; Journal ID: ISSN 0036-8075
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; americium, electrochemistry, minor actinides, oxidation

Citation Formats

Dares, C. J., Lapides, A. M., Mincher, B. J., and Meyer, T. J. Electrochemical oxidation of 243Am(III) in nitric acid by a terpyridyl-derivatized electrode. United States: N. p., 2015. Web. doi:10.1126/science.aac9217.
Dares, C. J., Lapides, A. M., Mincher, B. J., & Meyer, T. J. Electrochemical oxidation of 243Am(III) in nitric acid by a terpyridyl-derivatized electrode. United States. doi:10.1126/science.aac9217.
Dares, C. J., Lapides, A. M., Mincher, B. J., and Meyer, T. J. Thu . "Electrochemical oxidation of 243Am(III) in nitric acid by a terpyridyl-derivatized electrode". United States. doi:10.1126/science.aac9217. https://www.osti.gov/servlets/purl/1248209.
@article{osti_1248209,
title = {Electrochemical oxidation of 243Am(III) in nitric acid by a terpyridyl-derivatized electrode},
author = {Dares, C. J. and Lapides, A. M. and Mincher, B. J. and Meyer, T. J.},
abstractNote = {A high surface area, tin-doped indium oxide electrode surface-derivatized with a terpyridine ligand has been applied to the oxidation of trivalent americium to Am(V) and Am(VI) in nitric acid. Potentials as low as 1.8 V vs. the saturated calomel electrode are used, 0.7 V lower than the 2.6 V potential for one-electron oxidation of Am(III) to Am(IV) in 1 M acid. This simple electrochemical procedure provides, for the first time, a method for accessing the higher oxidation states of Am in non-complexing media for developing the coordination chemistries of Am(V) and Am(VI) and, more importantly, for separation of americium from nuclear waste streams.},
doi = {10.1126/science.aac9217},
journal = {Science},
issn = {0036-8075},
number = 6261,
volume = 350,
place = {United States},
year = {2015},
month = {11}
}