Journalartikel

Jahr der Veröffentlichung: 2000

Seiten: 1474-1476

Zeitschrift: Science

Bandnummer: 287

Heftnummer: 5457

DOI Link: https://doi.org/10.1126/science.287.5457.1474

Verlag: American Association for the Advancement of Science

Abstract: 

The structure of RuO2(110) and the mechanism for catalytic carbon monoxide oxidation on this surface were studied by low-energy electron diffraction, scanning tunneling microscopy, and density-functional calculations. The RuO2(110) surface exposes bridging oxygen atoms and ruthenium atoms not capped by oxygen. The latter act as coordinatively unsaturated sites—a hypothesis introduced long ago to account for the catalytic activity of oxide surfaces—onto which carbon monoxide can chemisorb and from where it can react with neighboring lattice-oxygen to carbon dioxide. Under steady-state conditions, the consumed lattice-oxygen is continuously restored by oxygen uptake from the gas phase. The results provide atomic-scale verification of a general mechanism originally proposed by Mars and van Krevelen in 1954 and are likely to be of general relevance for the mechanism of catalytic reactions at oxide surfaces.

Harvard-Zitierstil: Over, H., Kim, Y., Seitsonen, A., Wendt, S., Lundgren, E., Schmid, M., et al. (2000) Atomic-Scale Structure and Catalytic Reactivity of the RuO2(110) Surface, Science, 287(5457), pp. 1474-1476. https://doi.org/10.1126/science.287.5457.1474

APA-Zitierstil: Over, H., Kim, Y., Seitsonen, A., Wendt, S., Lundgren, E., Schmid, M., Varga, P., Morgante, A., & Ertl, G. (2000). Atomic-Scale Structure and Catalytic Reactivity of the RuO2(110) Surface. Science. 287(5457), 1474-1476. https://doi.org/10.1126/science.287.5457.1474