Synthesize, Optimization, and Evaluation of Fe-Co on Graphene Substrate in the Hydrogen Evolution Reaction

Document Type : Research Article

Authors

Faculty of Chemistry, Isfahan University of Technology, Isfahan, I.R. IRAN

Abstract

In this study, the FeCo/rGO was synthesized by a solvothermal procedure and evaluated as the hydrogen evolution reaction (HER) electrocatalyst in alkaline media. In this sample, the percentages of iron and cobalt were varied to determine the optimized percentage of metals in the alloy. The activities of iron-cobalt alloy catalysts were evaluated by different electrochemical techniques in KOH (1M). The CV and LSV results demonstrated the best electrochemical activity of Fe0.5Co0.5/rGO among all investigated samples. Fe0.5Co0.5/rGO showed the onset overpotential of -129 mV, the overpotential of -245 mV at the current density of 10 mA/cm2, and the Tafel slope of 165 mV/dec. Also, XRD, TEM, and FT-IR techniques were employed to investigate the structure of prepared samples. The results showed the cubic phase with the nanoparticles at the dimensions of 36 nm for the synthesized of iron-cobalt alloy.

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References

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Nashrieh Shimi va Mohandesi Shimi Iran
Volume 38, Issue 3 - Serial Number 93
October 2019
Pages 117-125

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