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A novel electrochemical strategy to detect hydrogen peroxide by utilizing peroxidase-mimicking activity of cerium oxide/graphene oxide nanocomposites.
Biosensors & Bioelectronics 2024 Februrary 23
We herein describe a novel electrochemical strategy to detect hydrogen peroxide (H2 O2 ) by utilizing the peroxidase-mimicking activity of cerium oxide nanoparticles (CeO2 NP) and reduced graphene oxide (rGO). Particularly, CeO2 NP/rGO nanocomposites were deposited on the commercial electrode by a very convenient and direct electrochemical reduction of graphene oxide. Due to the peroxidase-mimicking activity of CeO2 NP and the outstanding electrochemical properties of reduced graphene oxide, the reduction current of H2 O2 was greatly enhanced. Based on this strategy, we reliably determined H2 O2 down to 1.67 μM with excellent specificity and further validated its practical capabilities by robustly detecting H2 O2 present in heterogeneous human serum samples. We believe that this work could serve as a new facile platform for H2 O2 detection.
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