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Electrochemical Reaction on electrode
Posted 25 mar 2011, 15:34 GMT-4 Chemical Reaction Engineering Version 4.1 0 Replies
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I am using Chemical Reaction Engineering module in COMSOL4.1version.
I am trying to make the model of the corrosion which consists of two electrodes(anode and cathode).
I could build the model potential distribution and current flow in NaCl solution using Nernst-Planc equation.
But, I have to consider electrochemical reaction on electrode. That should affect the environmental change like concentration of metal, pH and so on. Normally, anodic reaction is dissolution of metal like M = M+ + e. On the other hand, cathodic reaction is reduction of oxygen, O2 + H2O + 4e = 4OH-. In addition, I have to consider the ion product of water, W.
How should I set the boundary condition to know the concentration of metal and pH in the solution depending on the current density on electrodes (electrochemical reactions)? Should I add new physics 'Chemical spices transport / reaction engineering' and use it in conjunction with Nernst Plank Equation ?
D.M
Hello Dicke
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