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Probing the transition state region in catalytic CO oxidation on Ru
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
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2015 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 347, no 6225, 978-982 p.Article in journal (Refereed) Published
Abstract [en]

Femtosecond x-ray laser pulses are used to probe the carbon monoxide (CO) oxidation reaction on ruthenium (Ru) initiated by an optical laser pulse. On a time scale of a few hundred femtoseconds, the optical laser pulse excites motions of CO and oxygen (O) on the surface, allowing the reactants to collide, and, with a transient close to a picosecond (ps), new electronic states appear in the OK-edge x-ray absorption spectrum. Density functional theory calculations indicate that these result from changes in the adsorption site and bond formation between CO and O with a distribution of OC-O bond lengths close to the transition state (TS). After 1 ps, 10% of the CO populate the TS region, which is consistent with predictions based on a quantum oscillator model.

Place, publisher, year, edition, pages
2015. Vol. 347, no 6225, 978-982 p.
National Category
Physical Sciences
Research subject
Chemical Physics
URN: urn:nbn:se:su:diva-115673DOI: 10.1126/science.1261747ISI: 000349958900034PubMedID: 25722407OAI: diva2:800002


Available from: 2015-04-01 Created: 2015-03-27 Last updated: 2016-08-18Bibliographically approved

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Östrom, HenrikÖberg, HenrikGladh, JörgenSellberg, Jonas A.Pettersson, Lars G. M.Nilsson, Anders
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