Systems with electrocatalytic surface reactions: Effect of the coverage dependence of the adsorption and desorption rates

Stability of steady states and possibilities for the formation of multiplicity and oscillations under potentiostatic conditions are studied for various deviations from the Langmuir adsorption kinetics in systems containing one type of substance reacting electrochemically only via its adsorptive state. If the adsorbate-adsorbate interaction between molecules of substance X along the electrode surface is repulsive or does not occur, a stable steady state exists. The multiplicity of steady states and the periodical solutions emerge only if this interaction is attractive.