Oscillations and chaos in catalytic reactions on the nm scale

We present Monte Carlo kinetics of the ${2A+B}_{2}\ensuremath{\rightarrow}2AB$ reaction occurring on a 20--30-nm-sized crystallite in the case when reactant adsorption on one of its facets results in surface restructuring. The latter is described on the basis of the well-defined lattice-gas model predicting phase separation in the overlayer. Oscillatory and chaotic kinetic regimes are found in the simulations. The mechanism of kinetic chaos on the nm scale is shown to be unique compared to that proposed for reactions on single-crystal surfaces.