Electrolytic reduction of U(IV) salts to U(III) in N,N -dimethylformamide: effects of electrode materials and counter anions

Kenji Shirasaki, Tomoo Yamamura, Yohei Monden, Yoshinobu Shiokawa

Research output: Contribution to journalArticle

Abstract

Experimental conditions of bulk electrolysis of U(IV) complexes to U(III) required for "alluranium redox-flow battery" were examined in terms of effects of electrode materials (platinum and mercury) and of counter ions (perchlorate and triflate) in N,N-dimethylformamide. When U(IV) perchlorate was used as starting material, concentration of U(III) increased until time point when that of U(IV) decreased to about a half of its initial concentration. After that the concentration of U(III) turned to decrease, in correspondence to amalgamation in case of Hg or solvent decomposition in case of Pt. When U(IV) triflate was used as starting material, efficient generation was observed on Hg, whereas on Pt, it was not observed. Mercury electrode was preferred for efficient reduction of U(IV) to U(III) both in triflate and perchlorate system but suppression of the amalgamation process is necessary.

Original languageEnglish
Pages (from-to)152-154
Number of pages3
Journaljournal of the physical society of japan
Volume75
Issue numberSUPPL.
Publication statusPublished - 2006 Dec 1

Keywords

  • Counter ions
  • Electrode materials
  • Electrolytic reduction of U(IV)
  • Trivalent uranium

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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