Electrochemical behaviour of uranium at a tripolyphosphate modified ITO electrode

Hou, Xiangyang; McLachlan, Jeffrey R.; Dares, Christopher J.

doi:10.1039/d1cc03877j

Electrochemical behaviour of uranium at a tripolyphosphate modified ITO electrode

Journal Article · Wed Sep 29 00:00:00 UTC 2021 · ChemComm

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

Hou, Xiangyang ^[1]; McLachlan, Jeffrey R. ^[2]; ^[2]

Florida State University, Tallahassee, FL (United States); OSTI
Florida State University, Tallahassee, FL (United States)

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.

View Accepted Manuscript (DOE)

Research Organization:: Florida International University (FIU), Miami, FL (United States); Florida State University, Tallahassee, FL (United States)

Sponsoring Organization:: USDOE; 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, Journal Name: ChemComm Journal Issue: 83 Vol. 57; ISSN 1359-7345

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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