Electrodeposition of uranium in dimethyl sulfoxide and its inhibition by acetylacetone as studied by EQCM

Electrochemical and spectroscopic investigations of uranium(III) with N,N,N′,N′-tetramethylmalonamide in DMF

“…4(d)). In case without TMMA, similar to the well-known voltammograms of U(dmso) 8 (ClO 4 ) 4 [21,41], the cathodic peak due to the U(IV)/U(III) reaction was observed at −1.02 V versus Fc/Fc + . As the free TMMA is added, the peak intensity wave decreased and the potential of the cathodic peak shifted negatively to the potential of the pc (−1.1 V) of the TMMA complex ((a)-(c)).…”

“…4(a)-(c), redox potential of the U(III)/U(IV) reaction is determined as E 1/2 = −1.09 V versus Fc/Fc + . This potential is approximately the same as U(IV)/U(III) potential of U(dmso) 8 (ClO 4 ) 4 in DMSO [21,41], and this result would indicate that coordination effect of the neutral ligand (TMMA) is in the same order with the DMSO ligand.…”

Electrolytic Reduction of U(IV) Salts to U(III) inN,N-Dimethylformamide: Effects of Electrode Materials and Counter Anions

“…2(b) in DMSO solution in cyclic voltammetry. 8 It is worthwhile to note that the solution potential is stable at −0.92 ∼ −1.5 V, unlike in the case of Pt, and this shows that the amalgamation did not destabilize U(III) significantly as shown in Fig. 2(b, upper).…”

“…These potentials agree approximately with the potential of -0.97, -1.23, -1.63 V, respectively, of reduction waves assigned to U(IV) → U(III) in cyclic voltammetry and EQCM measurement in DMSO solution. 8 This observation indicates that U(IV) perchlorate was reduced by the electrolysis to generate U(III) ion. After the time point of 50 min.…”

Electrodeposition of metallic uranium at near ambient conditions from room temperature ionic liquid

“…This shows that ðE c2 p Þ may be irreversible or the reduction waves, E c1 p and E c2 p , correspond to the reduction of U(IV) only, perhaps existing in different complex forms. Shirasaki et al [17] reported a similar behavior for U(ClO 4 ) 4 (DMSO) 8 complexes at platinum electrode. Based on observations similar to the ones given above, Shirasaki et al argued that the first three reduction waves obtained at platinum working electrode were due to the reduction of U(IV) to U(III) only.…”