Facile microwave-assisted synthesis of Pt single atom anchored on poly (ionic liquids) functionalized reduced graphene oxide for ultrasensitive detection of H2O2

Theoretically, Single atoms are providing the maximum atomic efficiency and are very promising to improve the performance of the noble metal catalysts for high-active electrochemical sensors. In this work, Pt single atom anchored on surficial modified, reduced graphene oxides with poly(ionic liquids) (Pt 1 _rGO@PILs) for detecting hydrogen peroxide (H 2 O 2 ) was synthesized via a facile microwave-assisted method. Due to the high active sites from PILs, 1.2 wt% isolated Pt atoms were steadily loaded on the surface of rGO@PILs and formed Pt-S 4 coordination with the modified PILs layer. Such atomical dispersion of Pt atoms and their unique coordination environment promoted electronic transfer during the electrochemical reaction. The Pt 1 _rGO@PILs composite presented a detection limitation of 1.5 µM in a liner range from 2.3 to 250 µM with high sensitivity up to 725.95 µA/µM. The catalysts also showed good stability for 30 days while active and the lowest detected concentration of approximately 15 μM for H 2 O 2 in the real commercial samples.