A reagentless non-enzymatic hydrogen peroxide sensor presented using electrochemically reduced graphene oxide modified glassy carbon electrode

•A facile green procedure proposed for high quality graphene synthesis using electrochemical reduction of graphene oxide•A simple, facile and reagentless non-enzymatic hydrogen peroxide sensor developed using ERGO/GCE.•ERGO/GCE exhibited high sensitivity, selectivity and finite limit of detection for H2O2 sensing at low overpotential.•ERGO/GCE exhibited long term stability and good reproducibility.

Herein, we report a simple, facile and reproducible non-enzymatic hydrogen peroxide (H2O2) sensor using electrochemically reduced graphene oxide (ERGO) modified glassy carbon electrode (GCE). The modified electrode was characterized by Fourier transform infrared (FT-IR), UV–Visible, scanning electron microscopy (SEM) and atomic force microscopy (AFM) techniques. Cyclic voltammetric (CV) analysis revealed that ERGO/GCE exhibited virtuous charge transfer properties for a standard redox systems and showed excellent performance towards electroreduction of H2O2. Amperometric study using ERGO/GCE showed high sensitivity (0.3 μA/μM) and faster response upon the addition of H2O2 at an applied potential of − 0.25 V vs. Ag/AgCl. The detection limit is assessed to be 0.7 μM (S/N = 3) and the time to reach a stable study state current is < 3 s for a linear range of H2O2 concentration (1–16 μM). In addition, the modified electrode exhibited good reproducibility and long-term stability.

Graphical abstractWe presented a reagentless non-enzymatic hydrogen peroxide sensor using electrochemically reduced graphene oxide material.Figure optionsDownload full-size imageDownload as PowerPoint slide