Inversion of Pattern Anisotropy During CO Oxidation on Pt(110) Correlated with Appearance of Subsurface Oxygen

• DOI: 10.1021/jp210742c
• Publication Date: 2012-01-13T19:43:02Z
• Authors: P. Sadeghi; K. Dunphy; C. Punckt; H. H. Rotermund
• Keywords: 0303 health sciences; 03 medical and health sciences

Spatiotemporal patterns occurring during the catalytic oxidation of carbon monoxide on Pt(110) show a strong anisotropy due to differences in diffusion coefficients along two major crystallographic axes catalyst: Reaction waves propagating parallel missing rows reconstructed Pt surface are much faster than reaction perpendicular direction. In this Article, we report observation that, as function exposure reactant gases, propagation velocities change drastically, resulting complete reversal anisotropy. This is correlated with appearance subsurface oxygen photoemission electron microscopic images patterns.