Non-enzymatic electrochemical sensing of hydrogen peroxide based on polypyrrole/platinum nanocomposites

In this work, we report a facile strategy for the preparation of polypyrrole/platinum nanocomposite (PPy/Pt nanocomposite), namely small and surface-clean Pt nanoparticles (Pt NPs) densely dispersed on polypyrrole nanoparticles (PPy NPs) by a simple, ultrafast, and microwave-assisted polyol process. The as-made nanocomposite was demonstrated to possess a good electrocatalytic activity toward the reduction of H2O2 by obviously enhancing the detection sensitivity and decreasing H2O2 reduction overpotential at -0.175 V (vs. Ag/AgCl). Accordingly, a selective, stable, repeatable and reproducible non-enzymatic electrochemical sensor of H2O2 based on the nanocomposite was constructed. (C) 2015 Elsevier B.V. All rights reserved.