KINETICS OF ADSORPTION RELAXATION ON AN UNIFORMLY INHOMOGENEOUS ELECTRODE SURFACE

Relaxation kinetics within the limits of the Temkin model for localize d adsorption (TMLA) are considered. It is shown that for significant d eviations from equilibrium at intermediate time values, the relaxation rate is proportional to (alpha ft)(-1) or to (beta ft)(-1), and this variant is identical to the original model for two-dimensional gas (TD GM). The width of the intermediate time interval is determined by an i nhomogeneity degree f(tau) = ln(tau(max)/tau(min)), which is proportio nal to the initial deviation <(Delta theta)over bar> in TMLA. For smal l deviations, the d theta/dt dependence on tis dose to an exponential dependence at alpha approximate to 1/2. At\alpha - beta\ --> 1 this de pendence contains a region, where \d theta/dt\ decreases proportionall y to lnt. Contrary to TDGM, TMLA enables one to explain the isotope ex change kinetics. Experimental data show that for a number of systems, f(tau) does not depend upon <(Delta theta)over bar> and kinetics can b e described by a phenomenological model proposed earlier. The theoreti cal foundation of this model is discussed, and kinetics curves are giv en.