Transformation of Uranyl Peroxide Studtite, [(UO2)(O2)(H2O)2](H2O)2, to Soluble Nanoscale Cage Clusters

Lobeck, Haylie L.; Isner, Jordan K.; Burns, Peter C.

doi:10.1021/acs.inorgchem.9b00230

Transformation of Uranyl Peroxide Studtite, [(UO₂)(O₂)(H₂O)₂](H₂O)₂, to Soluble Nanoscale Cage Clusters

Journal Article · Wed May 01 00:00:00 EDT 2019 · Inorganic Chemistry

DOI:https://doi.org/10.1021/acs.inorgchem.9b00230· OSTI ID:1510990

Lobeck, Haylie L. ^[1]; Isner, Jordan K. ^[2]; ^[2]

Univ. of Notre Dame, Notre Dame, IN (United States); University of Notre Dame
Univ. of Notre Dame, Notre Dame, IN (United States)

The dissolution behavior of uranyl peroxide studtite, [(UO₂)(O₂)(H₂O)₂](H₂O)₂, was examined under a wide range of alkaline aqueous environments with and without the addition of hydrogen peroxide. In the absence of added H₂O₂, studtite dissolved in aqueous solutions with a tetraethylammonium hydroxide to uranium molar ratio greater than 0.5, and the resulting species in solution characterized by Raman spectroscopy and electrospray ionization mass spectrometry (ESI-MS) is the uranyl peroxide nanocluster U₂₄, [(UO₂)(O₂)(OH)]₂₄^24–. This is the first demonstration of the formation of uranyl peroxide nanoclusters from studtite in a solution lacking additional hydrogen peroxide. In similar systems containing added hydrogen peroxide (0.01 M – 1.0 M), studtite dissolved in solutions with a TEAOH to uranium ratio greater than 0.1, and the resulting uranyl peroxide species in solution was U₂₈, [(UO₂)(O₂)_1.5]₂₈^28–.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Materials Science of Actinides (MSA); Univ. of Notre Dame, Notre Dame, IN (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: NA0003763

OSTI ID:: 1510990

Journal Information:: Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 10 Vol. 58; ISSN 0020-1669

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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