An In-situ X-ray absorption spectroelectrochemical study of the electroreduction of uranium ions in HCl, HNO, and NaCO solutions

Uehara, Akihiro*; Fujii, Toshiyuki*; Yamana, Hajimu*; Okamoto, Yoshihiro

The spectroelectrochemical cell was fabricated for in-situ X-ray absorption fine structure (XAFS) measurement. The XAFS spectra of U L-edge were monitored in electrolyte solutions during the electrochemical reduction. Tetravalent uranium was electrochemically prepared from hexavalent uranium and the extended X-ray absorption fine structure (EXAFS) was analyzed. The U $^{4+}$ formed in 0.1M HNO was partially re-oxidized to UO $^{2+}$ by NO in the solution. The UO carbonates were prepared during electrolysis.

Language	:	English
Journal	:	Radiochimica Acta
Volume	:	104
Number	:	1
Pages	:	p.1 - 9
Publication Year/Month	:	2016/01
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Paper URL	:	https://doi.org/10.1515/ract-2015-2436
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Keywords	:	放射光XAFS; 電気化学; 溶液化学
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Registration No. : AA20150672
JAEA Abstracts No. : 44001323
Paper Submission No. : 17995

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