Article Dans Une Revue Inorganic Chemistry Année : 2021

Charge Distribution in U 1– x Ce x O 2+ y Nanoparticles

Résumé

In view of safe management of the nuclear wastes, a sound knowledge of the atomic-scale properties of U1–xMxO2+y nanoparticles is essential. In particular, their cation valences and oxygen stoichiometries are of great interest as these properties drive their diffusion and migration behaviors into the environment. Here, we present an in-depth study of U1–xCexO2+y, over the full compositional domain, by combining X-ray diffraction and high-energy resolution fluorescence detection X-ray absorption near-edge structure. We show, on one hand, the coexistence of UIV, UV, and UVI and, on the other hand, that the fluorite structure is maintained despite this charge distribution.

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Dates et versions

hal-04714806 , version 1 (30-09-2024)

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Damien Prieur, Jean-François Vigier, Karin Popa, Olaf Walter, Oliver Dieste, et al.. Charge Distribution in U 1– x Ce x O 2+ y Nanoparticles. Inorganic Chemistry, 2021, 60 (19), pp.14550-14556. ⟨10.1021/acs.inorgchem.1c01071⟩. ⟨hal-04714806⟩
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