One-Step Electrochemical Synthesis of Cobalt-Doped Fe2O2CO3-Reduced Graphene Oxide Nanocomposites and Their Application for H2O2 Electro-Catalytic Reduction

Abstract

In this work, cobalt-doped Fe2O2CO3-reduced graphene oxide (Co@Fe2O2CO3-rGO) nanocomposites were synthesized by using one-step electrodeposition. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical methods were used to characterize the nanocomposites. The results showed that the Co@Fe2O2CO3 nanoparticles with average 20–40 nm were anchored on the rGO film tightly and the resulting nanocomposites showed excellent electro-catalytic effect toward the reduction of hydrogen peroxide. The determination of hydrogen peroxide was successfully achieved in the high salinity solution (0.5 mol L−1 NaCl) and the calibration curve was observed in the range of 1.5–956 μmol L−1 with the limit of quantitation of 1.5 μmol L−1 and the limit of detection of 0.4 μmol L−1.