The effect of poisoning species on the oscillatory dynamics of an electrochemical reaction

Electrochemistry is a prone field for observing complex behavior such as simple and mixed-mode oscillations, chaos and spatiotemporal pattern formation. Although modeling and numerical analysis of those systems is relatively common, analysis of the inner structure of the oscillatory region is a rather unexplored issue. We describe in this paper a numerical study of a surface catalyzed reaction that is being poisoned by a foreign adsorbing species. The effect of the poison coverage on the oscillatory period and amplitude is discussed with the help of parameter plane diagrams and mechanistic analysis. A coherent picture explaining the effect of the poison adsorption on the dynamic features is then constructed based on the obtained data.