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Spontaneous Deposition of Uranium Oxide at the Interface between Room Temperature Inorganic Ionic Liquid and Organic Solution

Research Project

Project/Area Number 25420905
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Nuclear engineering
Research InstitutionKyoto University

Principal Investigator

Uehara Akihiro  京都大学, 原子炉実験所, 助教 (30402952)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords電解還元 / ウラン / 水和物溶融体 / 析出 / XAFS / 液液界面 / 乾式再処理 / ナノ粒子 / 再処理
Outline of Final Research Achievements

The redox reaction of UO22+ in calcium chloride hexahydrate, CaCl2/6H2O, was investigated by electrochemical and spectroscopic methods. The hexavalent uranium UO22+ was dissolved and stabilized without hydrolysis in CaCl2/6H2O. Two step cathodic currents were observed corresponding to the reduction of UO22+. The reversible redox reaction of the UO22+/UO2+ couple was observed at the first cathodic current. The second cathodic reaction corresponding to the reduction of UO2+ was irreversible. The deposit formed at a bulk and a surface area of the platinum working electrode was determined to be uranium dioxide UO2 by X-ray diffraction analysis. The UO2+ was formed for very short lifetime at the first cathodic current resulting into UO2 formation because of UO2+ disproportionation reaction as the following reaction; 2UO2+ → UO22+ + UO2. The electron transfer reaction was observed at the interface between aqueous phase containing UO22+ and organic phase containing a reductant.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (29 results)

All 2016 2015 2014 2013 Other

All Int'l Joint Research (1 results) Journal Article (13 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 11 results,  Open Access: 6 results,  Acknowledgement Compliant: 8 results) Presentation (14 results) (of which Int'l Joint Research: 8 results,  Invited: 1 results) Book (1 results)

  • [Int'l Joint Research] University of Manchester/University of Leeds/Diamond Light Source(United Kingdom)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] An in-situ X-ray absorption spectroelectrochemical study of the electroreduction of uranium ions in HCl, HNO3, and Na2CO3 solutions2016

    • Author(s)
      Akihiro Uehara, Toshiyuki Fujii, Hajimu Yamana, and Yoshihiro Okamoto
    • Journal Title

      Radiochimica Acta

      Volume: 104 Issue: 1 Pages: 1-9

    • DOI

      10.1515/ract-2015-2436

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Detection and characterisation of sub-critical nuclei during reactive Pd metal nucleation by X-ray absorption spectroscopy2016

    • Author(s)
      S.-Y. Chang, Y. Grunder, S. G. Booth, L. B. Molleta, A. Uehara, J. F. W. Mosselmans, G. Cibin, V.-T. Pham, L. Nataf, R. A. W. Dryfe and S. L. M. Schroeder
    • Journal Title

      CrystEngComm

      Volume: 18 Issue: 5 Pages: 674-682

    • DOI

      10.1039/c5ce01883h

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] 高濃度電解質水溶液中のウランイオンの酸化還元反応2016

    • Author(s)
      上原章寛, 藤井俊行
    • Journal Title

      溶融塩および高温化学

      Volume: 59 Pages: 14-19

    • NAID

      40020798200

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Gold Deposition at a Free-Standing Liquid/Liquid Interface: Evidence for the Formation of Au(I) by Microfocus X-ray Spectroscopy (μXRF and μXAFS) and Cyclic Voltammetry2015

    • Author(s)
      Samuel G. Booth, Akihiro Uehara, Sin Yuen Chang, J. Fred W. Mosselmans, Sven L. M. Schroeder, and Robert A. W. Dryfe
    • Journal Title

      Journal of Physical Chemistry C

      Volume: 119 Issue: 29 Pages: 16785-16792

    • DOI

      10.1021/acs.jpcc.5b05127

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Electrochemical Insight into the Brust-Schiffrin Synthesis of Au Nanoparticles2015

    • Author(s)
      Akihiro Uehara, Samuel G. Booth, Sin Yuen Chang, Sven L. M. Schroeder, Takahito Imai, Teruo Hashimoto, J. Frederick W. Mosselmans, and Robert A. W. Dryfe
    • Journal Title

      Journal of the American Chemical Society

      Volume: 137 Issue: 48 Pages: 15135-15144

    • DOI

      10.1021/jacs.5b07825

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Redox and Ligand Exchange during the Reaction of Tetrachloroaurate with Hexacyanoferrate(II) at a Liquid-Liquid Interface: Voltammetry and X-ray Absorption Fine-Structure Studies2015

    • Author(s)
      Akihiro Uehara, Sin-Yuen Chang, Samuel G. Booth, Sven L. M. Schroeder, J. Frederick W. Mosselmans, and Robert A.W. Dryfe
    • Journal Title

      Electrochimica Acta

      Volume: 109 Pages: 997-1006

    • DOI

      10.1016/j.electacta.2015.12.108

    • NAID

      120005980890

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Structure and Bonding in Au(I) Chloride Species: A Critical Examination of X-ray Absorption Spectroscopy (XAS) Data2015

    • Author(s)
      S.Y. Chang, A. Uehara, S.G. Booth, K. Ignatyev, J.F.W. Mosselmans, R.A.W. Dryfe, and S.L.M. Schroeder
    • Journal Title

      RSC Advances

      Volume: 5 Issue: 9 Pages: 6912-6918

    • DOI

      10.1039/c4ra13087a

    • Related Report
      2014 Research-status Report
    • Acknowledgement Compliant
  • [Journal Article] Au Electrodeposition at the Liquid-Liquid Interface: mechanistic aspects2014

    • Author(s)
      A. Uehara, T. Hashimoto, R.A.W. Dryfe
    • Journal Title

      Electrochimica Acta

      Volume: 118 Pages: 26-32

    • DOI

      10.1016/j.electacta.2013.11.162

    • NAID

      120005372983

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Metal Deposition at the Liquid–Liquid Interface2014

    • Author(s)
      R.A.W. Dryfe, A. Uehara, S. G. Booth
    • Journal Title

      The Chemical Record

      Volume: 14 Issue: 6 Pages: 1013-1023

    • DOI

      10.1002/tcr.201402027

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Redox equilibrium of the UO22+/UO2+ couple in Li2MoO4–Na2MoO4 eutectic melt at 550 °C2014

    • Author(s)
      T. Nagai, A. Uehara, T. Fujii, N. Sato, H. Kofuji, M. Myochin, H. Yamana
    • Journal Title

      Journal of Nuclear Materials

      Volume: 454 Issue: 1-3 Pages: 159-163

    • DOI

      10.1016/j.jnucmat.2014.07.070

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Raman spectroscopic study of uranyl complex in alkali chloride melts2013

    • Author(s)
      A. Uehara, T. Nagai, T. Fujii, O. Shirai, H. Yamana
    • Journal Title

      J. Nucl. Mater.

      Volume: 437 Issue: 1-3 Pages: 166-170

    • DOI

      10.1016/j.jnucmat.2013.02.003

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Reduction behavior of UO22+ in molten LiCl-RbCl and LiCl-KCl eutectics by using tungsten2013

    • Author(s)
      T. Nagai, A. Uehara, T. Fujii, H. Yamana
    • Journal Title

      J. Nucl. Mater.

      Volume: 439 Issue: 1-3 Pages: 1-6

    • DOI

      10.1016/j.jnucmat.2013.03.078

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Raman spectroscopic study of uranyl complex in alkali chloride melts2013

    • Author(s)
      T. Fujii, T. Uda, Y. Iwadate, T. Nagai, A. Uehara, H. Yamana
    • Journal Title

      J. Nucl. Mater.

      Volume: 440 Issue: 1-3 Pages: 575-579

    • DOI

      10.1016/j.jnucmat.2013.04.010

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] 濃厚電解質溶液中でのアクチノイドイオンの酸化還元反応2016

    • Author(s)
      上原章寛
    • Organizer
      溶融塩委員会
    • Place of Presentation
      東京都市大学(神奈川県・川崎市)
    • Year and Date
      2016-01-27
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Electrochemical insight into the Brust-Schiffrin synthesis of Au nanoparticles2016

    • Author(s)
      Akihiro Uehara, Samuel G. Booth, Sin Yuen Chang, Sven L.M. Schroeder, Takahito Imai, Teruo Hashimoto, J. Frederick W. Mosselmans, and Robert A.W. Dryfe
    • Organizer
      Faraday Discussion, Nanoparticle Assembly: From Fundamentals to Applications
    • Place of Presentation
      Mumbai, India
    • Year and Date
      2016-01-07
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 金ナノ粒子合成メカニズムの 液液界面イオン移動ボルタンメトリーによる解明2015

    • Author(s)
      上原章寛, S.G. Booth, S.Y. Chang, 今井崇人, S.L.M. Schroeder, R.A.W. Dryfe
    • Organizer
      ポーラログラフィーおよび電気分析化学討論会
    • Place of Presentation
      イーグレひめじ(兵庫県・姫路市)
    • Year and Date
      2015-11-24
    • Related Report
      2015 Annual Research Report
  • [Presentation] ドデカンチオールを用いた金ナノ粒子合成過程の液液界面イオン移動ボルタンメトリーに基づく理解2015

    • Author(s)
      上原章寛, S.G. Booth, S.Y. Chang, S.L.M Schroeder, R.A.W. Dryfe
    • Organizer
      日本分析化学会第64年会
    • Place of Presentation
      九州大学(福岡県・福岡市)
    • Year and Date
      2015-09-09
    • Related Report
      2015 Annual Research Report
  • [Presentation] Evidence for a Strongly Bound Solvent Molecules: XANES and EXAFS of Aqueous Au(III) Cyanide2015

    • Author(s)
      Sin-Yuen Chang, Samuel Booth, Robert Dryfe, Akihiro Uehara, Konstantin Ignatyev, Fred Mosselmans, Sven Schroeder
    • Organizer
      XAFS16, 16th International Conference on X-ray Absorption Fine Structure
    • Place of Presentation
      Karlsruhe, Germany
    • Year and Date
      2015-08-23
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] In Situ XAS Studies of Pd Nanoparticle Nucleation at an Interface of Two Immiscible Phases2015

    • Author(s)
      S.-Y. Chang, S.G. Booth, Y. Grunder, L.B. Molleta, A. Uehara, J.F.W. Mosselmans, G. Cibin, R.A.W. Dryfe, S.L.M. Schroeder
    • Organizer
      XAFS16, 16th International Conference on X-ray Absorption Fine Structure
    • Place of Presentation
      Karlsruhe, Germany
    • Year and Date
      2015-08-23
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Why Au L3 XANES White Line Intensities Can Be a Poor Predictor of Oxidation State2015

    • Author(s)
      Sin-Yuen Chang, Samuel G. Booth, Akihiro Uehara, Konstantin Ignatyev, J. Fred W. Mosselmans, Robert A.W. Dryfe, and Sven L. M. Schroeder
    • Organizer
      XAFS16, 16th International Conference on X-ray Absorption Fine Structure
    • Place of Presentation
      Karlsruhe, Germany
    • Year and Date
      2015-08-23
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Brust-Schiffrin Synthesis: A mechanistic study2015

    • Author(s)
      S. G. Booth, A. Uehara, S.-Y. Chang, J. F. W. Mosslemans, S. L. M. Schroeder and R. A. W. Dryfe
    • Organizer
      XAFS16, 16th International Conference on X-ray Absorption Fine Structure
    • Place of Presentation
      Karlsruhe, Germany
    • Year and Date
      2015-08-23
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Structure and Bonding in Au(I) Chloride Species: A Critical Examination of X-ray Absorption Spectroscopy (XAS) Data2015

    • Author(s)
      S-Y Chang, SG Booth, A Uehara, K Ignatyev, JFW Mosselmans, RAW Dryfe, SLM Schroeder
    • Organizer
      GOLD2015
    • Place of Presentation
      Cardiff University, UK
    • Year and Date
      2015-07-26
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Brust-Schiffrin Synthesis: A mechanistic study2015

    • Author(s)
      S. G. Booth, A. Uehara, S.-Y. Chang, J. F. W. Mosslemans, S. L. M. Schroeder and R. A. W. Dryfe
    • Organizer
      GOLD2015
    • Place of Presentation
      Cardiff University, UK
    • Year and Date
      2015-07-26
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Electrochemical insight into the Brust-Schiffrin synthesis of Au nanoparticles2015

    • Author(s)
      A. Uehara, S. G. Booth, S.-Y. Chang, S.L.M. Schroeder, T. Imai, T. Hashimoto, J.F.W. Mosselmans, R.A.W. Dryfe
    • Organizer
      48th Heyrovsky Discussion
    • Place of Presentation
      Trest, Czech Republic
    • Year and Date
      2015-06-14
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ドデカンチオールを用いた金ナノ粒子生成過程における金(I)の存在2015

    • Author(s)
      上原 章寛, S.G. Booth, S.Y. Chang, S.L.M. Schroeder, R.A.W. Dryfe
    • Organizer
      日本分析化学会討論会
    • Place of Presentation
      山梨大学(山梨県・甲府市)
    • Year and Date
      2015-05-23
    • Related Report
      2015 Annual Research Report
  • [Presentation] 金ナノ粒子生成過程の電荷移動ボルタンメトリーによる解析2014

    • Author(s)
      上原章寛, S.G. Booth, S.Y. Chang, S.L.M. Schroeder, J.F.W. Mosselmans, R.A.W. Dryfe
    • Organizer
      ポーラログラフ及び電気分析化学討論会
    • Place of Presentation
      京都工芸繊維大学
    • Year and Date
      2014-11-15 – 2014-11-16
    • Related Report
      2014 Research-status Report
  • [Presentation] ヘキサシアノ鉄(II)酸による四塩化金イオンの還元及び錯生成反応2014

    • Author(s)
      上原 章寛、Robert A.W. Dryfe, Sven L.M. Schroeder, J. Fred W. Mosselmans, Sin Yuen Chang
    • Organizer
      日本分析化学会 2014年春の年会
    • Place of Presentation
      福島大学
    • Year and Date
      2014-05-24 – 2014-05-25
    • Related Report
      2014 Research-status Report
  • [Book] Molten Salts Chemistry and Technology2014

    • Author(s)
      A. Uehara, O. Shirai, T. Fujii, N. Sato, H. Yamana
    • Total Pages
      6
    • Publisher
      John Wiley and Sons
    • Related Report
      2014 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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