Redox equilibrium of the UO22+/UO2 + couple in Li2MoO4-Na2MoO 4 eutectic melt at 550 °c

Takayuki Nagai, Akihiro Uehara, Toshiyuki Fujii, Nobuaki Sato, Hirohide Kofuji, Munetaka Myochin, Hajimu Yamana

Research output: Contribution to journalArticle

Abstract

The redox equilibrium of UO22+/UO2 + couple was measured in Li2MoO4-Na 2MoO4 eutectic melt at 550 °C by cyclic voltammetry and absorption spectrophotometry. The standard redox potential of UO 22+/UO2+ couple was approximately evaluated by cyclic voltammetry. Further, the absorption spectrum and equilibrium potential were measured, repeatedly adding UO2 2+ source material into the melt containing UO2 +. From the correlation between the equilibrium potential of the melt and the concentration ratio [UO22+]/[UO2 +] spectrophotometrically evaluated, the standard redox potential of UO22+/UO2+ couple was determined to be -0.847 ± 0.010 V vs. O2/O2-.

Original languageEnglish
Pages (from-to)159-163
Number of pages5
JournalJournal of Nuclear Materials
Volume454
Issue number1-3
DOIs
Publication statusPublished - 2014 Aug 19

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)

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    Nagai, T., Uehara, A., Fujii, T., Sato, N., Kofuji, H., Myochin, M., & Yamana, H. (2014). Redox equilibrium of the UO22+/UO2 + couple in Li2MoO4-Na2MoO 4 eutectic melt at 550 °c. Journal of Nuclear Materials, 454(1-3), 159-163. https://doi.org/10.1016/j.jnucmat.2014.07.070