Reaction fronts and pulses in the CO oxidation on Pt: therortical analysis

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Item Type:	Article
Title:	Reaction fronts and pulses in the CO oxidation on Pt: therortical analysis
Creators Name:	Baer, M., Falcke, M., Zuelicke, C., Engel, H., Eiswirth, M. and Ertl, G.
Abstract:	A set of coupled nonlinear reaction-diffusion equations was formulated for the oxidation of CO on low-index plane Pt surfaces and solved for their spatiotemporal behaviour using continuation techniques and the method of global connections. A 2-variable model for Pt(111), consisting of the CO and O coverages as a function of time and space, gave rise to reaction fronts. In order to model the behaviour of Pt(111) or Pt(100) a third equation describing the respective adsorbate-driven phase transition had to be added. The resulting 3-variable system predicts extended regions of excitability, where pulses can be triggered. The front-respectively pulse - velocities as well as the critical radii for nucleation were computed and compared to experimental data where available.
Keywords:	Induced Thermal Desorption, Single Crystal Surfaces, Traveling Waves, Microscopy
Source:	Surface Science
ISSN:	0039-6028
Publisher:	Elsevier
Volume:	269-270
Number:	Pt A
Page Range:	471-475
Date:	15 May 1992
Official Publication:	https://doi.org/10.1016/0039-6028(92)91294-L

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