After plotting log(I/A) vs E/mV, you get a tafel curve. calculate the exchange current density, Io, the cathodic transfer coefficient ac and the rate constant of the reaction k.
The Attempt at a Solution
Is it simply, the exchange current density is e(y intercept)
cathodic transfer coeffiecent, the gradient of the line
And then putting those two into the following quation to get K
lnI = lnIo + (1-ac) x nF/RT
Thanks for your help!