Abstract
Graphene oxide (GO) film was evaporated onto graphite and used as an electrode to produce electrochemically reduced graphene oxide (ERGO) films by electrochemical reduction in 6 M KOH solution through voltammetric cycling. Fourier transformed infrared and Raman spectroscopy confirmed the presence of ERGO. Electrochemical impedance spectroscopy characterization of ERGO and GO films in ferrocyanide/ferricyanide redox couple with 0.1 M KCl supporting electrolyte gave results that are in accordance with previous reports. Based on the EIS results, ERGO shows higher capacitance and lower charge transfer resistance compared to GO.
Highlights
Graphene, a one-dimensional carbon sp2-bonded compound is finding considerable attention in the development of advance nanomaterials
The higher current and charge for each scans for the oxygenated solutions are due to the oxygen reduction reaction (ORR) which occurs concurrent with the reduction of graphene oxide (GO) to electrochemically reduced graphene oxide (ERGO)
Solid-phase electrochemical reduction of GO films on graphite in alkaline solution produced ERGO which was confirmed with Fourier transformed infrared (FTIR) and Raman spectra
Summary
A one-dimensional carbon sp2-bonded compound is finding considerable attention in the development of advance nanomaterials. Among the methods to synthesize RGO are by chemical exfoliation of GO in propylene carbonate followed by thermal reduction [4,5]. Another method of reduction of GO is by using hydrohalic acids [6]. A suspension of GO was evaporated on glassy carbon and used as an electrode and reduced by voltammetric cycling in 0.1 M Na2SO4 solution to produce ERGO films [11]. Voltammetric cycling was used to electrochemically reduce GO films to ERGO in KOH solution
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