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Journal of Radioanalytical and Nuclear Chemistry

, Volume 302, Issue 1, pp 281–288 | Cite as

Electrochemical behavior of uranyl in ionic liquid 1-butyl-3-methylimidazolium chloride mixture with water

  • Xu-Feng Tan
  • Li-Yong Yuan
  • Chang-Ming Nie
  • Kui Lui
  • Zhi-Fang Chai
  • Wei-Qun Shi
Article

Abstract

Electrochemical behaviors of U(VI) in 1-butyl-3-methylimidazolium chloride (C4MimCl) with various water contents investigated by chronopotentiometry and cyclic voltammetry. The electrochemical reduction of U(VI) was identified to follow two processes: a lower valence intermediate U(V) was initially formed at the potential of ca. −0.2 V(vs. Ag wire). Then, further deposition of UO2 was followed at around −0.8 V. Little amount of water (1–4 wt%) in C4MimCl, however, has an effect on the U(VI) reduction by changing the current density of the redox reaction and the diffusion coefficient of U(VI) in C4MimCl. The deposited product by potentiostatic electrolysis on the surface of stainless steel electrode was characterized by the scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and X-ray diffraction (XRD) methods. Although the electrodeposited black film was amorphous, the electrochemical reduced product of U(VI) can be still confirmed to be UO2 by XRD after the crystallization of the amorphous deposits at 1,073 K in nitrogen atmosphere.

Keywords

Ionic liquid Cyclic voltammetry Electrochemical behavior Uranyl 

Notes

Acknowledgments

This work was supported by the Major Research Plan “Breeding and Trans-mutation of Nuclear Fuel in Advanced Nuclear Fission Energy System” of the Natural Science Foundation of China (Grants 91226201,11105162,11275219,11275090 and 91126006) and the “Strategic Priority Research program” of the Chinese Academy of Sciences (Grants XDA030104).

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2014

Authors and Affiliations

  1. 1.School of Chemistry and Chemical EngineeringUniversity of South ChinaHengyangChina
  2. 2.Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina
  3. 3.School of Radiological & Interdisciplinary SciencesSoochow UniversitySuzhouChina

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