Imaging Pattern Formation in Surface Reactions from Ultrahigh Vacuum up to Atmospheric Pressures

  • Two optical methods that allow pattern formation to be investigated at an arbitrary pressure are here applied to image concentration patterns of adsorbed species associated with heterogeneous catalytic reactions. In contrast to most surface physical techniques, these methods are not restricted to high vacuum conditions and thus bridge the “pressure gap.” With carbon monoxide oxidation on a (110) surface of platinum as an example, the coupling mechanisms responsible for spatiotemporalTwo optical methods that allow pattern formation to be investigated at an arbitrary pressure are here applied to image concentration patterns of adsorbed species associated with heterogeneous catalytic reactions. In contrast to most surface physical techniques, these methods are not restricted to high vacuum conditions and thus bridge the “pressure gap.” With carbon monoxide oxidation on a (110) surface of platinum as an example, the coupling mechanisms responsible for spatiotemporal self-organization in surface reactions were followed from reaction-diffusion control to the thermokinetic region, associated with phenomena not previously observed in pattern formation.show moreshow less

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Metadaten
Author:H. H. Rotermund, G. Haas, Robert U. Franz, R. M. Tromp, G. Ertl
DOI:https://doi.org/10.1126/science.270.5236.608
Parent Title (English):In: Science 270 (1995) 5236, pp. 608-610
Document Type:Article
Language:English
Year of Publishing:1995
Date of Publication (online):2014/10/28
Release Date:2014/10/28
First Page:608
Last Page:610
University Bibliography:Hochschulbibliographie
Licence (German):Creative Commons - Namensnennung, Nicht kommerziell, Keine Bearbeitung