The following functions should be used to fit either a single non catalytic peak or to deconvolute a signal resulting from several adsorbed centers after a polynomial baseline has been subtracted, see the b command.
Note that the functions that are used to fit the shapes of the peaks assume that Nernst equation applies, i.e. that the system is very close to equilibrium. In other words, it makes sense to fit the data only if they are recorded at sufficiently slow scan rate.
Another assumption is that there are no redox interactions. (see sec. 126.96.36.199 in ref)