Abstract
Oxidation of Np(IV) with nitric acid in the presence of Ru/SiO2 catalysts was studied by spectrophotometry. The catalytic oxidation of Np(IV) in nitric acid solutions occurs even in the presence of hydrazine. The mechanism of Ru-catalyzed oxidation of Np(IV) with nitric acid was suggested on the basis of the kinetic data. The effect of the Ru nanoparticle size on the activation energy of the catalytic oxidation of Np(IV) was revealed. It shows that the heterogeneous-catalytic reaction is structure-sensitive (positive size effect).
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Borin, L.L. and Karelin, A.I., Termodinamika okislitel’novosstanovitel’nykh protsessov v tekhnologii aktinoidov (Thermodynamics of Redox Processes in Actinide Technology), Moscow: Atomizdat, 1977, p. 125.
Vladimirova, M.V., Fedoseev, D.A., and Artemova, L.A., Radiokhimiya, 1995, vol. 37, no. 1, pp. 44–48.
Jianyu, H., Odoj, R., Baocheng, T., and Merz, E., Radiochim. Acta, 1998, vol. 83, pp. 183–187.
Anan’ev, A.V., Boltoeva, M.Yu., Tyumentsev, M.S., and Tananaev, I.G., Radiokhimiya, 2012, vol. 54, no. 6, pp. 505–510.
Ananiev, A.V., Shilov, V.P., Moisy, Ph., and Madic, Ch., Radiochim. Acta, 2003, vol. 91, pp. 499–504.
Tananaev, I.G., Dzyubenko, V.I., and Shilov, V.P., Radiokhimiya, 1989, vol. 31, no. 6, pp. 56–59.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © A.V. Anan’ev, M.Yu. Boltoeva, M.S. Tyumentsev, I.G. Tananaev, 2013, published in Radiokhimiya, 2013, Vol. 55, No. 2, pp. 116–119.
Rights and permissions
About this article
Cite this article
Anan’ev, A.V., Boltoeva, M.Y., Tyumentsev, M.S. et al. Ruthenium-catalyzed oxidation of Np(IV) in nitric acid solutions. Radiochemistry 55, 158–161 (2013). https://doi.org/10.1134/S1066362213020045
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1066362213020045