where ν is the scan rate (V/s), α is the charge transfer coefficient (set to 0.5), A is the ESA in cm 2 , and D0 is the diffusion coefficient, which for [Fe(CN)6] 3-/4-is approx. 6.67•10 -6 cm 2 /s , and C0 the concentration of the electrochemically active compound (mol cm -3 ).