Fabrication of Nitrogen-Doped Reduced Graphene Oxide Modified Screen Printed Carbon Electrode (N-rGO/SPCE) as Hydrogen Peroxide Sensor

In recent years, the electrochemical sensing approach has attracted electrochemists because of its excellent detection process, simplicity, high sensitivity, cost-effectiveness, and high selectivity. In this study, we prepared nitrogen doped reduced graphene oxide (N-rGO) and characterized it using various advanced techniques such as XRD, SEM, EDX, Raman, and XPS. Furthermore, we modified the active surface of a screen printed carbon electrode (SPCE) via the drop-casting of N-rGO. This modified electrode (N-rGO/SPCE) exhibited an excellent detection limit (LOD) of 0.83 mu M with a decent sensitivity of 4.34 mu A mu M(-1)cm(-2) for the detection of hydrogen peroxide (H2O2). In addition, N-rGO/SPCE also showed excellent selectivity, repeatability, and stability for the sensing of H2O2. Real sample investigations were also carried out that showed decent recovery.

Automated summary

In recent years, the electrochemical sensing approach has gained significant attention due to its excellent detection performance. In this study, the active surface of a screen printed carbon electrode was successfully modified using nitrogen doped reduced graphene oxide, resulting in an electrode with excellent detection performance and selectivity. The experimental results also demonstrated the outstanding performance of this electrode in the detection of hydrogen peroxide.