Electrochemical synthesis of reduced graphene oxide and their anti-corosion properties

Hung Van Hoang, Mo Thi Nguyen, Phong Viet Pham

Abstract


Reduced graphene oxide (Gr) has been synthesized electrochemically on the surface of copper metal at a fixed potential of 1.5 V versus a standard saturated calomel electrode (SCE). The synthesized Gr was then characterized with X-Ray diffraction,  thermogravimetric analysis, raman and Fourier transform infrared (FT-IR) spectroscopies. The anti-corrosion behavior of Gr was tested with polarization measurements and electrochemical impedance spectroscopy (EIS) in acidic medium of 0.5 M sulfuric acid solution. X-ray difraction (XRD), thermogravimetric analysis (TGA), and Raman analyses revealed that the Gr is more thermo-stable than GO. The d-spacing between sheets in comparison Gr (~3.78 Å) is shorter than  d-spacing between sheets in  GO (~8.80 Å).  The Gr film synthesized within 30 seconds shows the better anti-corrosion behavior in comparison to the films synthesized with longer time interval.

Keywords


Reduced graphene oxide; corrosion protection; electrochemical synthesis

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DOI: https://doi.org/10.51316/jca.2023.011

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