CO oxidation over ZnO films on Pt(1 1 1) at near-atmospheric pressures

Y. Martynova, B. H. Liu, M. E. McBriarty, I. M.N. Groot, M. J. Bedzyk, S. Shaikhutdinov*, H. J. Freund

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

Well-ordered ultrathin ZnO(0 0 0 1) films were grown on Pt(1 1 1) in a layer-by-layer mode. The reactivity of the films as a function of the film thickness and coverage was examined by the CO oxidation reaction at near-atmospheric pressures. At low temperatures (∼450 K), CO2 production is found to be much higher on the films of partial coverage than on dense ZnO(0 0 0 1) films and bare Pt(1 1 1). Under reaction conditions, monolayer islands and an entire monolayer film transform into two-monolayers-thick islands, which dominate the surface of the active catalysts. The results provide an adequate structural model for elucidating the reaction mechanism on the oxide/metal boundary at technologically relevant conditions.

Original languageEnglish (US)
Pages (from-to)227-232
Number of pages6
JournalJournal of Catalysis
Volume301
DOIs
StatePublished - May 1 2013

Keywords

  • CO oxidation
  • Thin oxide films
  • Zinc oxide

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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