Issue 28, 2019

Electrochemical oxidation of trivalent americium using a dipyrazinylpyridine modified ITO electrode

Abstract

We present here the electrochemical oxidation of Am(III) to AmVO2+ and AmVIO22+ in pH 1 nitric acid using a mesoporous tin-doped indium oxide electrode modified with a covalently attached dipyrazinylpyridine ligand. The applied potential affects the distribution of Am oxidation products. At potential 1.8 V, only Am(V) is observed, while increasing the potential to as much as 2.0 V, results in oxidation of Am(III) to Am(V) and subsequent oxidation of Am(V) to Am(VI). At applied potentials >2.0 V, Am(III) is oxidized to Am(V), while Am(VI) is reduced to Am(V). The latter reduction reaction is likely due to the increased rate of hydrogen peroxide formation from the 2-electron oxidation of water at the electrode at these high potentials. The development of future ligand modified electrodes for actinide oxidations must consider how they facilitate Am oxidations while disfavoring unwanted or competing reactions.

Graphical abstract: Electrochemical oxidation of trivalent americium using a dipyrazinylpyridine modified ITO electrode

Supplementary files

Article information

Article type
Communication
Submitted
29 Jan 2019
Accepted
11 Mac 2019
First published
12 Mac 2019

Chem. Commun., 2019,55, 4035-4038

Author version available

Electrochemical oxidation of trivalent americium using a dipyrazinylpyridine modified ITO electrode

M. J. Lopez, M. V. Sheridan, J. R. McLachlan, T. S. Grimes and C. J. Dares, Chem. Commun., 2019, 55, 4035 DOI: 10.1039/C9CC00837C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements