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Evaluation of the potential of the Np(VII)/(VI) couple in acid solutions using the reaction Ag(I) + Np(VII) ⇄ Ag(II) + Np(VI)

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Abstract

The reaction of Np(VII) with Ag(I) was studied by spectrophotometry with the aim to evaluate the potential of the Np(VII)/(VI) couple in acid solutions. In perchloric acid solutions with pH 1.5 and 3.05, the potential E is 1.93 and 1.85 V, respectively. Extrapolation to a solution with pH 0 gives 2.20 ± 0.01 V. A close value (E = 2.22 V) is obtained by extrapolating the potential from a 1 M NaOH solution (pH 13.83, E = 0.582 or 0.587 V) to acid solutions (pH 0).

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Authors and Affiliations

  1. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow, Russia

    V. P. Shilov, A. B. Yusov & A. M. Fedoseev

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  1. V. P. Shilov
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  2. A. B. Yusov
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  3. A. M. Fedoseev
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Original Russian Text © V.P. Shilov, A.B. Yusov, A.M. Fedoseev, 2009, published in Radiokhimiya, 2009, Vol. 51, No. 2, pp. 121–122.

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Shilov, V.P., Yusov, A.B. & Fedoseev, A.M. Evaluation of the potential of the Np(VII)/(VI) couple in acid solutions using the reaction Ag(I) + Np(VII) ⇄ Ag(II) + Np(VI). Radiochemistry 51, 138–139 (2009). https://doi.org/10.1134/S1066362209020064

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  • DOI: https://doi.org/10.1134/S1066362209020064

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