| The spontaneous formation of patterns in reaction-diffusion systems has been broadly studied in the last decades. Its full understanding is many times restrained to the possibility of modification and control of the merging structures. The catalytic CO oxidation on Pt (110) is an outstanding example of a 2D extended system of diffusively coupled oscillators that far from equilibrium is able to developed self organized structures. Purposeful global modulations of one of the reaction parameters have already been proofed to be a fruitful technique and give rise to a number of spatiotemporal patterns. A possibility is to introduce a slight fluctuation in the amount of CO involved in the reaction. The present work is focus on the effect of noise induced in the CO oxidation on Platinum and the stemming pattern formation. Numerical studies and experimental observations are presented. Theoretical studies are done by using the realistic KEE model. Initial bistable and excitable regimes were chosen, and well documented in the literature phenomena arise, like coherence resonance or suppression-recovery of chemical turbulence. |
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