Laser-induced target patterns in the oscillatory CO oxidation on Pt(110)

Janpeter Wolff; Michael Stich; Carsten Beta; Harm Hinrich Rotermund

doi:10.1021/jp0498015

Laser-induced target patterns in the oscillatory CO oxidation on Pt(110)

Janpeter Wolff, Michael Stich, Carsten Beta, Harm Hinrich Rotermund^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The formation of target patterns in oscillatory CO oxidation on Pt(110) is studied using the controlled creation of temperature heterogeneities on the catalyst surface induced by a focused laser beam. Outward and, for the first time, inward traveling target waves are observed as well as target patterns that are spatially confined to the immediate vicinity of the temperature inhomogeneity. The experimental results are compared to theoretical studies of the complex Ginzburg-Landau equation with a nonuniform frequency distribution and to numerical simulations of the Krischer-Eiswirth-Ertl model for the catalytic CO oxidation on Pt(110). Both the complex Ginzburg-Landau equation and the kinetic model need to be extended by a global coupling term to obtain good agreement with the whole range of experimental observations.

Original language	English
Pages (from-to)	14282-14291
Number of pages	10
Journal	Journal of Physical Chemistry: Part B
Volume	108
Issue number	38
Early online date	29 May 2004
DOIs	https://doi.org/10.1021/jp0498015
Publication status	Published - 23 Sept 2004

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title = "Laser-induced target patterns in the oscillatory CO oxidation on Pt(110)",

abstract = "The formation of target patterns in oscillatory CO oxidation on Pt(110) is studied using the controlled creation of temperature heterogeneities on the catalyst surface induced by a focused laser beam. Outward and, for the first time, inward traveling target waves are observed as well as target patterns that are spatially confined to the immediate vicinity of the temperature inhomogeneity. The experimental results are compared to theoretical studies of the complex Ginzburg-Landau equation with a nonuniform frequency distribution and to numerical simulations of the Krischer-Eiswirth-Ertl model for the catalytic CO oxidation on Pt(110). Both the complex Ginzburg-Landau equation and the kinetic model need to be extended by a global coupling term to obtain good agreement with the whole range of experimental observations.",

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T1 - Laser-induced target patterns in the oscillatory CO oxidation on Pt(110)

AU - Wolff, Janpeter

AU - Stich, Michael

AU - Beta, Carsten

AU - Rotermund, Harm Hinrich

PY - 2004/9/23

Y1 - 2004/9/23

N2 - The formation of target patterns in oscillatory CO oxidation on Pt(110) is studied using the controlled creation of temperature heterogeneities on the catalyst surface induced by a focused laser beam. Outward and, for the first time, inward traveling target waves are observed as well as target patterns that are spatially confined to the immediate vicinity of the temperature inhomogeneity. The experimental results are compared to theoretical studies of the complex Ginzburg-Landau equation with a nonuniform frequency distribution and to numerical simulations of the Krischer-Eiswirth-Ertl model for the catalytic CO oxidation on Pt(110). Both the complex Ginzburg-Landau equation and the kinetic model need to be extended by a global coupling term to obtain good agreement with the whole range of experimental observations.

AB - The formation of target patterns in oscillatory CO oxidation on Pt(110) is studied using the controlled creation of temperature heterogeneities on the catalyst surface induced by a focused laser beam. Outward and, for the first time, inward traveling target waves are observed as well as target patterns that are spatially confined to the immediate vicinity of the temperature inhomogeneity. The experimental results are compared to theoretical studies of the complex Ginzburg-Landau equation with a nonuniform frequency distribution and to numerical simulations of the Krischer-Eiswirth-Ertl model for the catalytic CO oxidation on Pt(110). Both the complex Ginzburg-Landau equation and the kinetic model need to be extended by a global coupling term to obtain good agreement with the whole range of experimental observations.

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JO - Journal of Physical Chemistry: Part B

JF - Journal of Physical Chemistry: Part B

IS - 38

ER -

Laser-induced target patterns in the oscillatory CO oxidation on Pt(110)

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