Kinetic Aspects of the Electrode Reactions

It was mentioned in Section 2.2 that even in the case of a simple electrode reaction one must take into account both heterogeneous electron transfer and mass transport processes. Let us therefore examine the mathematical relationships which govern the two processes. 

Before examining the electrode reaction kinetics it is necessary to recall a few basic aspects of chemical kinetics. Consider the following elementary process  

for an elementary step, reaction order and molecularity coincide, one can write  

The overall rate of transformation of A into B can, therefore, be expressed by  

At equilibrium, the rate of conversion will be zero (vf= vr). Hence  

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