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Your search keyword '"Zeuthen, Helene"' showing total 12 results
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12 results on '"Zeuthen, Helene"'

5. Water clustering on nanostructured iron oxide films

Author

Merte, Lindsay R., primary, Bechstein, Ralf, additional, Peng, Guowen, additional, Rieboldt, Felix, additional, Farberow, Carrie A., additional, Zeuthen, Helene, additional, Knudsen, Jan, additional, Lægsgaard, Erik, additional, Wendt, Stefan, additional, Mavrikakis, Manos, additional, and Besenbacher, Flemming, additional

Published
2014
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7. In Situ Study of CO Oxidation on HOPG‐Supported Pt Nanoparticles

Author

Porsgaard, Soeren, primary, Ono, Luis K., additional, Zeuthen, Helene, additional, Knudsen, Jan, additional, Schnadt, Joachim, additional, Merte, Lindsay R., additional, Chevallier, Jacques, additional, Helveg, Stig, additional, Salmeron, Miquel, additional, Wendt, Stefan, additional, and Besenbacher, Flemming, additional

Published
2013
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10. Reduction of FeO/Pt(111) thin films by exposure to atomic hydrogen

Author

Knudsen, Jan, primary, Merte, Lindsay R., additional, Grabow, Lars C., additional, Eichhorn, Falk M., additional, Porsgaard, Soeren, additional, Zeuthen, Helene, additional, Vang, Ronnie T., additional, Lægsgaard, Erik, additional, Mavrikakis, Manos, additional, and Besenbacher, Flemming, additional

Published
2010
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11. Direct Visualization of Catalytically Active Sites at the FeO–Pt(111) Interface

Author

Kudernatsch, Wilhelmine, Peng, Guowen, Zeuthen, Helene, Bai, Yunhai, Merte, Lindsay R., Lammich, Lutz, Besenbacher, Flemming, Mavrikakis, Manos, and Wendt, Stefan

Abstract

Within the area of surface science, one of the “holy grails” is to directly visualize a chemical reaction at the atomic scale. Whereas this goal has been reached by high-resolution scanning tunneling microscopy (STM) in a number of cases for reactions occurring at flat surfaces, such a direct view is often inhibited for reaction occurring at steps and interfaces. Here we have studied the CO oxidation reaction at the interface between ultrathin FeO islands and a Pt(111) support by in situSTM and density functional theory (DFT) calculations. Time-lapsed STM imaging on this inverse model catalyst in O2and CO environments revealed catalytic activity occurring at the FeO–Pt(111) interface and directly showed that the Fe-edges host the catalytically most active sites for the CO oxidation reaction. This is an important result since previous evidence for the catalytic activity of the FeO–Pt(111) interface is essentially based on averaging techniques in conjunction with DFT calculations. The presented STM results are in accord with DFT+U calculations, in which we compare possible CO oxidation pathways on oxidized Fe-edges and O-edges. We found that the CO oxidation reaction is more favorable on the oxidized Fe-edges, both thermodynamically and kinetically.

Published
2015
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