Tafel slope 125 Voltammogram

With reference to reversible electrode reactions, we have tackled the question of how slow the rate of change in potential has to be for the resulting voltammogram to be indistinguishable from that under true steady-state conditions [67]. It was concluded that, in order to obtain both the correct half-wave potential (to within 1 mV) and Tafel slope, the scan rate, va, must be such that... 

For a reversible electron-transfer process, the Tafel relationship corrected for mass transport holds in the central region of the voltammogram (Brett and Oliveira-Brett, 1993). Therefore, for a reversible one-electron process, a plot of - Euz versus logio(/ - Zi7m) will have a slope of 59/n mV per decade at 25°C. 

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