Inhibition of Electron Transfer at Partially Blocked Electrodes

Inhibition of Electron Transfer at Partially Blocked Electrodes 

An approximate resolution of the system above leads to an equation relating the substrate concentration at the active sites, (CA) [=0, to its value at the boundary between the constrained diffusion layer and the linear diffusion layer, (Ca)x=2Rq  

At the external boundary of the constrained diffusion layer, application of the linear diffusion characteristic equations leads to 

Equivalent Diffusion and Migration Laws for Electron Hopping Between Fixed Sites 

The rate constants may be expressed as functions of the self-exchange rate constant, k0, and the potential difference, linearizing the activation-driving force law and taking a value of 0.5 for the symmetry factor. Thus, 

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