Active sites in methanol oxidation on Cu(110) determined by STM and molecular beam measurements
- 128 Downloads
STM has been combined with molecular beam rate measurements to gain an understanding of the oxidative dehydrogenation of methanol to produce formaldehyde, both at the macroscopic and microscopic level. From this a model of the reaction is developed where the methanol initial reacts at very few active oxygen sites located at the short sides of oxygen islands on the Cu(110) surface. Such sites are very much rarer on a surface which is saturated with 0.5 monolayers of oxygen and the reaction rate is initially very low, but shows autocatalytic behaviour, rising in time as vacancies are created in the oxygen layer.
Keywordsactive site catalysis selective oxidation methanol copper
Unable to display preview. Download preview PDF.
- Y. Kagan, A. Rozovski, L. Liberov, E. Slivinski, G. Lin, S. Loktev and A. Bashkirov, Dokl. Akad. Nauk. SSR 224(1975)1081.Google Scholar
- G. Chinchen, P. Denny, D. Parker, M. Spencer and D. Whan, Appl. Catal. 30(1987)333.Google Scholar
- M. Barteau, M. Bowker and R.J. Madix, Surf. Sci. 94(1980)303.Google Scholar
- M. Bowker and R.J. Madix, Surf. Sci. 102(1981)542.Google Scholar
- M. Bowker, P. Pudney and C. Barnes, J. Vac. Sci. Technol. A 8(1990)816.Google Scholar
- C. Barnes, P. Pudney, Q. Guo and M. Bowker, J. Chem. Soc. Faraday Trans. 86(1990)2693.Google Scholar
- F. Leibsle, Surf. Sci. 311(1994)45.Google Scholar
- S. Francis, F. Leibsle, S. Haq, N. Xiang and M. Bowker, Surf. Sci. 315(1994)284.Google Scholar
- F. Leibsle, S. Francis, S. Haq and M. Bowker, Surf. Sci. 318(1994)46.Google Scholar