Bimetallic catalysts as dissipative structures: stationary concentration patterns in the O-2+H-2 reaction on a composite Rh(110)/Pt surface

Authors
Schutz, E Esch, F Gunther, S Schaak, A Marsi, M Kiskinova, M Imbihl, R
Citation
E. Schutz et al., Bimetallic catalysts as dissipative structures: stationary concentration patterns in the O-2+H-2 reaction on a composite Rh(110)/Pt surface, CATAL LETT, 63(1-2), 1999, pp. 13-19
Citations number
32
Categorie Soggetti
Physical Chemistry/Chemical Physics","Chemical Engineering
Journal title
CATALYSIS LETTERS
ISSN journal
1011372X → ACNP
Volume
63
Issue
1-2
Year of publication
1999
Pages
13 - 19
Database
ISI
SICI code
1011-372X(1999)63:1-2<13:BCADSS>2.0.ZU;2-G
Abstract
The O-2 + H-2 reaction has been studied under low pressure conditions (10(- 5) mbar) employing a microstructured Rh(110)/Pt surface as catalyst. Photoe mission electron microscopy (PEEM) and scanning photoelectron microscopy (S PEM) were used as spatially resolving in situ methods. Under reaction condi tions stationary concentration patterns (Turing-like structures) of the ads orbates develop inside the Pt domains which are associated with a compositi onal change of the metallic substrate.