Low-pressure methanol oxidation over a Cu(110) surface under stationary conditions: (I) reaction kinetics

L. Zhou, S. Günther, R. Imbihl

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11 Scopus citations

Abstract

The steady-state kinetics of methanol oxidation over Cu(110) have been studied in the 10-7 to 10-3 mbar range. H2, H2O, and CO2 are found in addition to the main product formaldehyde. The reactive sticking coefficient of methanol reaches 0.2. A pronounced hysteresis is observed when the temperature is cycled. Our data indicate the presence of two rate maxima, one at ≈400-520 K and the other at ≈900 K. The amplitude of the low-temperature reactivity peak decreases with increasing total pressure, vanishing beyond 10-3 mbar. High oxygen partial pressures led to a poisoning of the reaction, which was apparently caused by the inhibitory effect of high oxygen coverage on methanol adsorption.

Original languageEnglish
Pages (from-to)166-172
Number of pages7
JournalJournal of Catalysis
Volume230
Issue number1
DOIs
StatePublished - 15 Feb 2005
Externally publishedYes

Keywords

  • Copper(110)
  • Formaldehyde
  • Hysteresis
  • Methanol oxidation
  • Pressure gap
  • Stationary kinetics

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