Model studies of catalysis with microstructured bimetallic surfaces

verfasst von

R. Imbihl

Abstract

Microstructured bimetallic surfaces prepared by optical lithography allow us to study dynamic effects under low pressure conditions with spatially resolving in situ techniques such as photoelectron emission microscopy (PEEM) and scanning photoelectron microscopy (SPEM). Reactions of the automotive catalytic converter on microstructured Pt/Rh surfaces have been investigated. The following effects have been observed: macroscopic size effects in reactivity due to diffusional coupling, front nucleation at Pt/Rh domain boundaries and the formation of stationary concentration patterns due to reversible adsorbate-induced segregation in bimetallic alloyed films. The experiments are complemented by simulations of the reactions for composite media aimed at 'microchemical engineering' of catalytic surfaces. (C) 2000 Elsevier Science B.V.

Organisationseinheit(en)

Institut für Physikalische Chemie und Elektrochemie

Typ

Artikel

Journal

Journal of Molecular Catalysis A: Chemical

Band

158

Seiten

101-106

Anzahl der Seiten

6

ISSN

1381-1169

Publikationsdatum

18.07.2000

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Katalyse, Prozesschemie und -technologie, Physikalische und Theoretische Chemie

Elektronische Version(en)

https://doi.org/10.1016/S1381-1169(00)00048-0 (Zugang: Geschlossen)