Abstract
The electrochemical reduction of hydrogen peroxide has been studied on a series of simulated nuclear fuel (SIMFUEL) materials with different amounts of simulated fission products. Steady-state polarization measurements under diffusion-compensated conditions show that the reaction proceeds with a weak dependence on applied potential and fractional reaction orders with respect to . A mechanism for reduction on SIMFUEL materials is proposed to explain these features. It is found that the activity of the material for the reduction reaction increases with the doping level. This increase can be attributed to noble metal particles present in the SIMFUEL. This enhanced reactivity is most apparent at low overpotentials, where reduction proceeds significantly faster on the noble metal particles than on the lattice.
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