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Title: Electrochemical behaviour of uranium at a tripolyphosphate modified ITO electrode

Journal Article · · ChemComm
DOI:https://doi.org/10.1039/d1cc03877j· OSTI ID:1978750

UO22+ binds to the surface of a tripolyphosphate modified mesoporous indium tin-doped oxide electrode (nanoITO|P3). Electrochemical studies reveal that nITO|P3 electrodes catalyze the 2-electron interconversion between UO22+ and U4+ with the P3-ligand assisting in the rate-limiting proton-coupled reduction of U(V) to U(IV), based on the kinetic isotope effect (1.8). Product composition between nITO|P3(U4+) and surface adsorbed UO2 can be controlled by adjusting the proton concentration and/or scan rate in voltammograms. Furthermore these studies with uranium suggest that nITO|P3 electrodes are good candidates for redox transformations with other actinides including neptunium, plutonium, and americium.

Research Organization:
Florida International University (FIU), Miami, FL (United States); Florida State Univ., Tallahassee, FL (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
NE0008539; SC0016568
OSTI ID:
1978750
Alternate ID(s):
OSTI ID: 1823499
Journal Information:
ChemComm, Vol. 57, Issue 83; ISSN 1359-7345
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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