| Literature DB >> 25722407 |
H Öström1, H Öberg1, H Xin2, J LaRue3, M Beye4, M Dell'Angela5, J Gladh1, M L Ng2, J A Sellberg6, S Kaya2, G Mercurio5, D Nordlund7, M Hantschmann8, F Hieke5, D Kühn8, W F Schlotter9, G L Dakovski9, J J Turner9, M P Minitti9, A Mitra9, S P Moeller9, A Föhlisch10, M Wolf11, W Wurth12, M Persson13, J K Nørskov3, F Abild-Pedersen2, H Ogasawara7, L G M Pettersson1, A Nilsson14.
Abstract
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 O K-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.Entities:
Year: 2015 PMID： 25722407 DOI： 10.1126/science.1261747
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728