Effects of external global noise on the catalytic CO oxidation on Pt(110)
P. S. Bodega, S. Alonso, H. H. Rotermund
TL;DR
This study investigates how external global noise influences CO oxidation on Pt(110), demonstrating its role in turbulence suppression and boundary modification between bistable phases through experiments and simulations.
Contribution
It introduces the effect of external stochastic signals on catalytic CO oxidation, combining experimental PEEM data with numerical modeling to reveal new control mechanisms.
Findings
External noise suppresses turbulence in the reaction system.
Noise modifies the boundaries between bistable phases.
Experimental and simulation results are consistent.
Abstract
Oxidation reaction of CO on a single platinum crystal is a reaction-diffusion system that may exhibit bistable, excitable, and oscillatory behavior. We studied the effect of a stochastic signal artificially introduced into the system through the partial pressure of CO. First, the external signal is employed as a turbulence suppression tool, and second, it modifies the boundaries in the bistable transition between the CO and oxygen covered phases. Experiments using photoemission electron microscopy (PEEM) together with numerical simulations performed with the Krischer-Eiswirth-Ertl (KEE) model are presented.
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