How do you calculate tafel slope?

Answer 1

The Tafel slope is calculated from a linear plot of the logarithm of the current density (log(j)) versus the overpotential (η). The Tafel equation is typically expressed as η = a + b * log(j), where 'a' is a constant and 'b' is the Tafel slope. To find the Tafel slope, you can perform a linear regression on the data points within the Tafel region, yielding the slope 'b' from the linear fit. The Tafel slope is often expressed in millivolts per decade (mV/decade) to indicate the change in overpotential per tenfold change in current density.