I. Bhugun et Fc. Anson, A GENERALIZED TREATMENT OF THE DYNAMICS OF THE ADSORPTION OF LANGMUIRIAN SYSTEMS AT STATIONARY OR ROTATING-DISK ELECTRODES, Journal of electroanalytical chemistry [1992], 439(1), 1997, pp. 1-6
A simple but comprehensive analysis of the behavior to be expected fro
m molecules whose Langmuirian adsorption on electrodes is controlled b
y both their rate of transfer to the surface and the rate of their tra
nsformation from the dissolved to the adsorbed state (and vice-versa)
is presented. A 'master equation' relating coverage and time is derive
d for cases where the mass transport of the adsorbate to the surface o
f the electrode is by linear diffusion (stationary electrode) or by co
nvection-diffusion (rotating disk electrode). Five sub-cases are exami
ned in which the influence of one (or a combination) of the factors co
ntrolling the adsorption is dominant. in each case, an easily computed
, dimensionless, integral equation depending on only one parameter is
derived. Corresponding calculated values of coverage vs. dimensionless
time are presented and their shapes are discussed. A global descripti
on of the dynamics of adsorption for Langmuirian systems is thereby ac
hieved. (C) 1997 Elsevier Science S.A.