Chemical state tuning of surface Ce species on pristine CeO₂ with 2400% boosting in peroxidase-like activity for glucose detection

Abstract

We demonstrate that the Ce reactivity of CeO₂ towards H₂O₂ is dictated by its local structure and electron density. More than 2400% increase in peroxidase-like activity has been achieved on the (100) surface for glucose detection due to the promoted H₂O₂ adsorption and subsequent activation by the electron-rich Ce species.