Front explosion in a periodically forced surface reaction
Front explosion in a periodically forced surface reaction
Publication Type:
Journal ArticleSource:
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Volume 72, Number 4 (2005)URL:
https://www.scopus.com/inward/record.uri?eid=2-s2.0-28844484490&doi=10.1103%2fPhysRevE.72.046214&partnerID=40&md5=3b84be325f99a48f018479178f98e86dKeywords:
Catalysis, Cobalt, Labyrinthine pattern, Oscillations, Oxidation, Phase locked loops, Phase-locked homogeneous states, Reaction-diffusion systems, Surface phenomena, Surface reaction, TurbulenceAbstract:
Resonantly forced oscillatory reaction-diffusion systems can exhibit fronts with complicated interfacial structure separating phase-locked homogeneous states. For values of the forcing amplitude below a critical value the front "explodes" and the width of the interfacial zone grows without bound. Such front explosion phenomena are investigated for a realistic model of catalytic CO oxidation on a Pt(110) surface in the 2:1 and 3:1 resonantly forced regimes. In the 2:1 regime, the fronts are stationary and the front explosion leads to a defect-mediated turbulent state. In the 3:1 resonantly forced system, the fronts propagate. The front velocity tends to zero as the front explosion point is reached and the final asymptotic state is a 2:1 resonantly locked labyrinthine pattern. The front dynamics described here should be observable in experiment since the model has been shown to capture essential features of the CO oxidation reaction. © 2005 The American Physical Society.
