Figure 3.

Multienzyme-like activity of Cr/CeO₂ nanozyme. A) Concentration-dependent reaction rate for Cr/CeO₂ nanozyme in TMB Assay. B) POD-like activity of Cr/CeO₂ nanozyme. Inset: Photo images of final solution after reacting with Cr/CeO₂ nanozymes for 60 min in TMB method. C) Time-dependent absorbance at 562 nm with Cr/CeO₂ nanozyme in NBT method. D) SOD-like activity of Cr/CeO₂ nanozyme. Inset: Photo images of result solution after reacting with Cr/CeO₂ nanozymes for 140 min in NBT method. E) Absorbance of H₂O₂ solution with or without Cr/CeO₂ nanozyme. F) H₂O₂ clearance rate of Cr/CeO₂ nanozyme. Inset: Photo images of H₂O₂ solution after reacting with Cr/CeO₂ nanozyme for 10 min. G) GPx-like activity of Cr/CeO₂ nanozyme by GPx Assay Kit. H) Corresponding reaction rate of Cr/CeO₂ nanozyme was calculated during GPx-like activity assay. Deionized water serves as blank control in all assay, marked as "con".