This MAPLE worksheet calculates electrochemical impedance for mechanisms with rapid diffusion of soluble species and a single adsorbed intermediate. If you use this in your work, please cite D.A. Harrington, Theory of Electrochemical Impedance of Surface Reactions: Second-Harmonic and Large-Amplitude Response, Can. J. Chem., 75 (1997) 1508-1517 .
To view an image of the worksheet, see here.
For a MAPLE VR4 worksheet file (produced under Windows): largeamp.mws
For a text file of the MAPLE code: largeamp.txt