To evaluation the number of electrons transferred in the oxygen reduction reaction, in Koutecky-Levich 's equation, at what potential should we read the currents? Or what current density do we put in this equation?
1/j = 1/jk + 1/B(w^1/2)
Hadi Jabbar Alagealy
1- Record the ORR voltammograms at a different rotation speed
2-Estimate the current density with rpm from the date.
3- plot the current with the angular velocity of the disk ω using Koutecky–Levich
4- Find the number of electron transfers in oxygen reduction
from the slope of the plot
4- Use relation 1/J = 1/JL + 1/JK
where JL=Bω1/2
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