The interaction of hydrogen and carbon monoxide with oxygen on Cu(111)-Fe Surfaces
Abstract
The interaction of hydrogen and carbon monoxide with oxygen adsorbed on Cu(111)-Fe surfaces containing different amounts of iron has been studied with ellipsometry, Auger electron spectroscopy and low energy electron diffraction. With carbon monoxide copper can be reduced completely and if, at larger iron deposits, γ-Fe 2O 3 is present, γ-Fe 2O 3 can be reduced to Fe 3O 4. The maximum reaction rate is proportional to the square of the total copper surface. With hydrogen all oxygen can be removed. The reduction proceeds via a number of different stages. This is explained by the subsequent occurrence of γ-Fe 2O 3, Fe 3O 4 Fe 0.95O and Fe.
- Publication:
-
Applied Surface Science
- Pub Date:
- October 1986
- DOI:
- 10.1016/0169-4332(86)90093-0
- Bibcode:
- 1986ApSS...27...24V