The Role of Dissolved Hydrogen on Rare Earth–Doped Uranium Dioxide Corrosion in the Presence of Hydrogen Peroxide

Electrochemical and X-ray photoelectron spectroscopic (XPS) methods have been used to study the combined influence of H2O2 and H2 on the oxidation of SIMFUEL (UO2) electrodes in 0.1 mol·dm−3 KCl (pH = 9.5) at 60°C. The SIMFUEL electrodes contain REIII (rare earth) ions at UIV lattice sites within the UO2 matrix. In both Ar-purged and H2/Ar-purged solutions the final corrosion potential values were dependent on [H2O2]; however, the XPS analyses...