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Spatial pattern formation in a catalytic surface reaction: The facetting of Pt(110) in CO+O2

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Imbihl,  Ronald
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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PhysRevLett.64.1409.pdf
(Publisher version), 296KB

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Citation

Falta, J., Imbihl, R., & Henzler, M. (1990). Spatial pattern formation in a catalytic surface reaction: The facetting of Pt(110) in CO+O2. Physical Review Letters, 64(12), 1409. doi:10.1103/PhysRevLett.64.1409.


Cite as: http://hdl.handle.net/21.11116/0000-0007-69F7-D
Abstract
A detailed LEED beam profile analysis of the structural changes induced by the catayltic CO oxidation on Pt(110) has been carried out with a high-resolution instrument (SPALEED). Under conditions where the 1×2⇄1×1 phase transition also takes place one observes spatial pattern formation via a faceting process. Facts of roughly uniform size and orientation build up a regular array characterized by a lateral periodicity of 70 lattice units along [11¯0]. The mechanism is discussed in terms of a nonequilibrium structure arising from kinetic instabilities.