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(A) Scheme of the oxidative bromination of PR to Br4PR. (B) UV-vis spectra collected during the PR bromination assay for CeO2-x nanorods/nanocubes. The spectra were collected at the end of 10 minutes of reaction time, with the H2O2 concentration of 10 μM and the Br− concentration of 10 mM. (C) The amount of Br4PB generated over time using the CeO2-x nanorods/nanocubes with different R values. Data are mean ± SD (n = 3).
