Electrodeposition of uranium in dimethyl sulfoxide and its inhibition by acetylacetone as studied by EQCM

Kenji Shirasaki, Tomoo Yamamura, T. Herai, Y. Shiokawa

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

In the study of the all-uranium redox-flow battery with a high efficiency, electrochemical investigations of the negative electrode reaction, i.e. U(IV)/U(III) of uranium β-diketone complexes, is necessary in aprotic solvents. In our recent studies, the uranium(IV) acelylacetonate, known to show the simplest voltammograms due to a quasi-reversible U(IV)/U(III) reaction at -2.6 V versus Fc/Fc+ in the solvent with the small donor number, shows more complicated voltammograms in the solvents with the larger donor numbers such as dimethyl sulfoxide (DMSO). For U4+ ion without acetylacetone in such solvents, several researchers reported an electrodeposition at around -1.6 to -2 V versus Fc/Fc+, whereas its details have not known at all. Therefore in this study, the electrode reactions of the U(IV)/U(III) and the U(III)/U(0) reaction of U(dmso)8(ClO4)4 were investigated by direct monitoring of weight changes of a Au electrode during potential sweeps by using the EQCM, as well as the HMDE. Also, an inhibition of the uranium electrodeposition by an addition of the acetylacetone was investigated.

Original languageEnglish
Pages (from-to)217-221
Number of pages5
JournalJournal of Alloys and Compounds
Volume418
Issue number1-2
DOIs
Publication statusPublished - 2006 Jul 20

Keywords

  • Acetylacetone
  • Dimethyl sulfoxide
  • Inhibition of uranium deposition
  • U(III) → U(0)
  • U(IV) → U(III)

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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