Low-pressure methanol oxidation over a Cu(110) surface under stationary conditions: (II) adsorbate coverages and reactivity

L. Zhou, S. Günther, R. Imbihl

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The kinetics of methanol oxidation on a Cu(110) surface have been followed under stationary reaction conditions in the 10-7 to 10-5 mbar range with low-energy electron diffraction, Auger electron spectroscopy, photoelectron emission microscopy, and rate measurements. A large, 300-400 K-wide hysteresis occurs with cycling of the temperature. The (5×2) and c(2×2) structures, attributed to intermediates of the reaction, are seen only in a T-interval from 300 to ≈380 K, where the reaction ignites. The surface exhibits substantial carbon coverage upon heating, but on the cooling branch the surface is largely carbon free down to ≈400 K, where the surface becomes covered by C-containing adsorbates again.

Original languageEnglish
Pages (from-to)295-301
Number of pages7
JournalJournal of Catalysis
Volume232
Issue number2
DOIs
StatePublished - 10 Jun 2005
Externally publishedYes

Keywords

  • Copper(110)
  • Formaldehyde
  • Hysteresis
  • Methanol oxidation
  • Ordered overlayer

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