Reproducible, stable and fast electrochemical activity from easy to make graphene on copper electrodes
By Bosch-Navarro, Concha; Laker, Zachary P. L.; Rourke, Jonathan P. & Wilson, Neil R.
Published in Phys. Chem. Chem. Phys.
The Royal Society of Chemistry
2015
Abstract
The electrochemical activity of graphene is of fundamental importance to applications from energy storage to sensing, but has proved difficult to unambiguously determine due to the challenges innate to fabricating well defined graphene electrodes free from contamination. Here, we report the electrochemical activity of chemical vapour deposition (CVD) graphene grown on copper foil without further treatment, through appropriate choice of electrolyte. Fast electron transfer kinetics are observed for both inner and outer sphere redox couples with fully covered graphene on copper electrodes (k[degree] = 0.014 +/- 0.001 cm s-1 or k[degree] = 0.012 +/- 0.001 cm s-1 for potassi
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