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) (Pt₁_rGO@PILs) for detecting hydrogen peroxide (H₂O₂) 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-S₄ 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 Pt₁_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 H₂O₂ in the real commercial samples.