The Nernst-Planck-Poisson Problem

For the sake of simplicity we will tackle the case of a one-electron transfer (7.1), although the same methodology here described has been successfully applied to the study of a munber of systems with different mechanisms, including comproportionation reactions [3] and amalgamation processes [5], and using different electrochemical techniques chronoamperometry [4], cyclic voltammetry [6] and multipulse voltammetries [7]. 

In the resolution of the problem we consider the electroactive species and involved in the faradaic process 

The conversion of species into in weakly supported media 

Prom Eq. (7.2), mass conservation estabhshes that the variation of the concentration of species j with time and distance to the (hemi)spherical electrode is given by 

Apart from the electroactive and electroinactive species in solution (A, B, M and X), we also need to include the description of the electric potential in the simulation. The Poisson equation relates the potential 4 with the local electric charge density, p (C cm )  

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