TY - JOUR
T1 - Electroseparation of zinc(II) from uranium(III) prepared by reduction of uranium(IV) with zinc amalgam in dimethylformamide
AU - Shirasaki, Kenji
N1 - Funding Information:
The author would like to express great acknowledgements to Prof. Tomoo Yamamura (Inst. for Integrated Radiation and Nuclear Science, Kyoto Univ.) and late associate Prof. Isamu Satoh for their kind encouragements and supports. This work was partly supported by JSPS KAKENHI [Grant No. 19760607].
Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Nature B.V.
PY - 2022/7
Y1 - 2022/7
N2 - The Electroseparation of zinc(II) from a solution of uranium(III) generated by the reduction of uranium(IV) triflate (U(OTf)4) with zinc amalgam (Zn(Hg)) was studied to establish a convenient route to the precursors of organic uranium(III) compounds. Specifically, the electrode reactions of U(OTf)4 in N,N-dimethylformamide on mercury (Hg) and Zn(Hg) electrodes were probed by voltammetry and bulk electrolysis measurements. The voltammograms recorded on the former electrode showed three cathodic waves assigned to the reduction of a uranium(IV) solvate complex (− 1.48 V), the reduction of [U(OTf)]3+ (− 1.81 V), and uranium amalgamation (− 2.65 V). On the latter electrode, the first cathodic wave was masked, as it was located at the potential of zinc amalgamation. Bulk electrolysis experiments revealed that for both Hg and Zn(Hg), the working electrode potential featured a plateau around − 2.3 V, which was not observed in the corresponding voltammograms and was related to the degradation of uranium(III) based on spectroscopic observations. The Electroseparation of zinc(II) from the uranium(III) solution on Zn(Hg) was successfully (highest coulombic efficiency = 0.81, final zinc(II) separation ratio = 93.4%) carried out after the reduction of U(OTf)4 by Zn(Hg). Graphical abstract: [Figure not available: see fulltext.]
AB - The Electroseparation of zinc(II) from a solution of uranium(III) generated by the reduction of uranium(IV) triflate (U(OTf)4) with zinc amalgam (Zn(Hg)) was studied to establish a convenient route to the precursors of organic uranium(III) compounds. Specifically, the electrode reactions of U(OTf)4 in N,N-dimethylformamide on mercury (Hg) and Zn(Hg) electrodes were probed by voltammetry and bulk electrolysis measurements. The voltammograms recorded on the former electrode showed three cathodic waves assigned to the reduction of a uranium(IV) solvate complex (− 1.48 V), the reduction of [U(OTf)]3+ (− 1.81 V), and uranium amalgamation (− 2.65 V). On the latter electrode, the first cathodic wave was masked, as it was located at the potential of zinc amalgamation. Bulk electrolysis experiments revealed that for both Hg and Zn(Hg), the working electrode potential featured a plateau around − 2.3 V, which was not observed in the corresponding voltammograms and was related to the degradation of uranium(III) based on spectroscopic observations. The Electroseparation of zinc(II) from the uranium(III) solution on Zn(Hg) was successfully (highest coulombic efficiency = 0.81, final zinc(II) separation ratio = 93.4%) carried out after the reduction of U(OTf)4 by Zn(Hg). Graphical abstract: [Figure not available: see fulltext.]
KW - Bulk electrolysis
KW - Electroseparation
KW - Uranium(III)
KW - Voltammetry
KW - Zinc amalgamation
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U2 - 10.1007/s10800-022-01698-7
DO - 10.1007/s10800-022-01698-7
M3 - Article
AN - SCOPUS:85127781681
SN - 0021-891X
VL - 52
SP - 1101
EP - 1108
JO - Journal of Applied Electrochemistry
JF - Journal of Applied Electrochemistry
IS - 7
ER -