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Journal Article

Controlling turbulence in a surface chemical reaction by time–delay autosynchronization

MPS-Authors
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Beta,  Carsten
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Bertram,  Matthias
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21881

Mikhailov,  Alexander S.
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22027

Rotermund,  Harm H.
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21498

Ertl,  Gerhard
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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PhysRevE.67.046224.pdf
(Publisher version), 642KB

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Citation

Beta, C., Bertram, M., Mikhailov, A. S., Rotermund, H. H., & Ertl, G. (2003). Controlling turbulence in a surface chemical reaction by time–delay autosynchronization. Physical Review E, 67(4), 046224-1-046224-10. doi:10.1103/PhysRevE.67.046224.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-1064-8
Abstract
A global time–delay feedback scheme is implemented experimentally to control chemical turbulence in the catalytic CO oxidation on a Pt(110) single crystal surface. The reaction is investigated under ultrahigh vacuum conditions by means of photoemission electron microscopy. We present results showing that turbulence can be efficiently suppressed by applying time-delay autosynchronization. Hysteresis effects are found in the transition regime from turbulence to homogeneous oscillations. At optimal delay time, we find a discontinuity in the oscillation period that can be understood in terms of an analytical investigation of a phase equation with time-delay autosynchronization. The experimental results are reproduced in numerical simulations of a realistic reaction model.