Redox equilibrium of the UO super(2+) sub(2)/UO super(+) sub(2) couple in Li sub(2)MoO sub(4)-Na sub( 2)MoO sub(4) eutectic melt at 550 [degrees]C

The redox equilibrium of UO super(2+) sub(2)/UO sub(2) couple was measured in Li sub(2)MoO sub(4)-Na sub( 2)MoO sub(4) eutectic melt at 550 [degrees]C by cyclic voltammetry and absorption spectrophotometry. The standard redox potential of UO super(2+) sub(2)/UO super(+) sub(2) couple was approximate...

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Bibliographic Details
Published in:Journal of nuclear materials 2014-11, Vol.454 (1-3), p.159-163
Main Authors: Nagai, Takayuki, Uehara, Akihiro, Fujii, Toshiyuki, Sato, Nobuaki, Kofuji, Hirohide, Myochin, Munetaka, Yamana, Hajimu
Format: Article
Language:English
Subjects:
Electrode potentials
Eutectic temperature
Joining
Melts
Nuclear engineering
Spectrophotometry
Voltammetry
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Summary:The redox equilibrium of UO super(2+) sub(2)/UO sub(2) couple was measured in Li sub(2)MoO sub(4)-Na sub( 2)MoO sub(4) eutectic melt at 550 [degrees]C by cyclic voltammetry and absorption spectrophotometry. The standard redox potential of UO super(2+) sub(2)/UO super(+) sub(2) couple was approximately evaluated by cyclic voltammetry. Further, the absorption spectrum and equilibrium potential were measured, repeatedly adding UO super(2+) sub(2) source material into the melt containing UO super(+) sub(2). From the correlation between the equilibrium potential of the melt and the concentration ratio [UO super(2+) sub(2)]/[UO super(+) sub(2)] spectrophotometrically evaluated, the standard redox potential of UO super(2+) sub(2)/UO super(+) sub(2) couple was determined to be -0.847 + or - 0.010 V vs. O sub(2)/O super(2-).
ISSN:0022-3115
DOI:10.1016/j.jnucmat.2014.07.070