  A kinetic theory is proposed to elucidate complex nature of adsorption and
desorption on surface and to calculate the adsorption and desorption rates in a
practically simple way. This theory provides decomposition of the energy
barriers and considers synergistic effects of lateral interactions between
adsorbates. A concise formulation was derived for adsorption and desorption
rates on surfaces covered with multi-component adsorbates. The adsorption and
desorption rates are formulated by multiplying a two-body synergistic
coefficient that is explicitly dependent on surface coverage, compared
respectively to those from classical theories.
