Figure 6

(a) EPR profiles measured at room temperature for CeO₂ nanocubes calcined at 550 °C with (100 mg CeO₂ + 0.05 mL deionized H₂O) or without water; (b) DMPO spin-trapping ESR profiles recorded at ambient temperature in an aqueous dispersion of CeO₂ nanocubes (10 g/L) calcined at 550 °C (for DMPO-OH^• adduct).