Control of spatiotemporal chaos in catalytic CO oxidation by laser-induced pacemakers

Michael Stich, Christian Punckt, Carsten Beta, Harm H. Rotermund

Research output: Contribution to journalArticlepeer-review

Abstract

Control of spatiotemporal chaos is achieved in the catalytic oxidation of CO on Pt(110) by localized modification of the kinetic properties of the surface chemical reaction. In the experiment, a small temperature heterogeneity is created on the surface by a focused laser beam. This heterogeneity constitutes a pacemaker and starts to emit target waves. These waves slowly entrain the medium and suppress the spatiotemporal chaos that is present in the absence of control. We compare this experimental result with a numerical study of the Krischer-Eiswirth-Ertl model for CO oxidation on Pt(110). We confirm the experimental findings and identify regimes where complete and partial controls are possible.
Original languageEnglish
Pages (from-to)419-426
Number of pages8
JournalPhilosophical Transactions A
Volume366
Issue number1864
DOIs
Publication statusPublished - 13 Feb 2008

Keywords

  • pattern formation
  • chaos control
  • reaction–diffusion systems

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