Catalysis on mesoscopic composite surfaces: Influence of palladium boundaries on pattern formation during CO oxidation on Pt(1 1 0)

J. Lauterbach, K. Asakura, P. B. Rasmussen, H. H. Rotermund, M. Bär, M. D. Graham, I. G. Kevrekidis, G. Ertl

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

The effect of well-defined palladium boundaries on the formation of reaction-diffusion patterns during the oxidation of CO on Pt(1 1 0) has been investigated. The Pd boundaries were created by microlithography technique. Reaction-diffusion patterns formed on this surface were observed by photoemission electron microscopy (PEEM). On a multilayer Pd-covered Pt( 1 1 0) surface, depending on the partial pressures, Pd areas may act as a reservoir of CO for adjacent Pt regions. Therefore, patterns forming on the bare Pt areas exhibit a pronounced interaction with the artificial Pt/Pd boundaries.

Original languageEnglish (US)
Pages (from-to)493-501
Number of pages9
JournalPhysica D: Nonlinear Phenomena
Volume123
Issue number1-4
DOIs
StatePublished - Jan 1 1998

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Mathematical Physics
  • Condensed Matter Physics
  • Applied Mathematics

Keywords

  • CO oxidation
  • Composite catalyst
  • Pattern formation
  • Photoemission electron microscope
  • Pt( 1 1 0)

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