Sensitive colorimetric detection of ascorbic acid using Pt/CeO2 nanocomposites as peroxidase mimics

Because of the high stability and low cost, nanomaterials performed as alternative artificial enzymes to natural enzymes have attracted much interest and been widely applied in bioanalysis, catalysis and environment in the past decades. In this work, Pt/CeO2 nanocomposites were designed as novel nanozymes and synthesized by a surfactant free method. The Pt nanoparticles with an average size of 2.6 ± 0.4 nm were uniformly decorated on the surface...