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- W4387076298 abstract "Cerium oxide nanoparticles (CNPs) have recently gained increasing interest as redox enzyme-mimetics to scavenge the intracellular excess of reactive oxygen species, including hydrogen peroxide (H2O2). Despite the extensive exploration of CNP scavenging activity, there remains a notable knowledge gap regarding the fundamental mechanism underlying the CNP catalyzed disproportionation of H2O2. In this Letter, we present evidence demonstrating that H2O2 adsorption at CNP surface triggers the formation of stable intermediates known as ceriumperoxo complexes (Ce-O2 2-). The cerium-peroxo complexes can be resolved by Raman scattering and UV-Visible spectroscopy. We further demonstrate that the catalytic reactivity of CNPs in the H2O2 disproportionation reaction increases with the Ce(III) fraction. The developed approach using UV-Visible spectroscopy for the characterization of Ce-O2 2-complexes can potentially serve as a foundation for determining the catalytic reactivity of CNPs in the disproportionation of H2O2." @default.
- W4387076298 created "2023-09-27" @default.
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- W4387076298 date "2023-09-25" @default.
- W4387076298 modified "2023-09-28" @default.
- W4387076298 title "Cerium oxide catalyzed disproportionation of hydrogen peroxide: a closer look at the reaction intermediate" @default.
- W4387076298 doi "https://doi.org/10.48550/arxiv.2309.13981" @default.
- W4387076298 hasPublicationYear "2023" @default.
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