Home > Publications database > Symmetry-resolved CO desorption and oxidation dynamics on O/Ru(0001) probed at the C K-edge by ultrafast x-ray spectroscopy > print |
001 | 483446 | ||
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100 | 1 | _ | |a LaRue, Jerry |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
245 | _ | _ | |a Symmetry-resolved CO desorption and oxidation dynamics on O/Ru(0001) probed at the C K-edge by ultrafast x-ray spectroscopy |
260 | _ | _ | |a Melville, NY |c 2022 |b American Institute of Physics |
336 | 7 | _ | |a article |2 DRIVER |
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520 | _ | _ | |a We report on carbon monoxide desorption and oxidation induced by 400 nm femtosecond laser excitation on the O/Ru(0001) surface probed by time-resolved x-ray absorption spectroscopy (TR-XAS) at the carbon K-edge. The experiments were performed under constant background pressures of CO (6 × 10$^{−8}$ Torr) and O$_2$ (3 × 10$^{−8}$ Torr). Under these conditions, we detect two transient CO species with narrow 2$π^*$ peaks, suggesting little 2π* interaction with the surface. Based on polarization measurements, we find that these two species have opposing orientations: (1) CO favoring a more perpendicular orientation and (2) CO favoring a more parallel orientation with respect to the surface. We also directly detect gas-phase CO2 using a mass spectrometer and observe weak signatures of bent adsorbed CO2 at slightly higher x-ray energies than the 2$π^*$ region. These results are compared to previously reported TR-XAS results at the O K-edge, where the CO background pressure was three times lower (2 × 10$^{−8}$ Torr) while maintaining the same O$_2$ pressure. At the lower CO pressure, in the CO 2$π^*$ region, we observed adsorbed CO and a distribution of OC–O bond lengths close to the CO oxidation transition state, with little indication of gas-like CO. The shift toward “gas-like” CO species may be explained by the higher CO exposure, which blocks O adsorption, decreasing O coverage and increasing CO coverage. These effects decrease the CO desorption barrier through dipole–dipole interaction while simultaneously increasing the CO oxidation barrier. |
536 | _ | _ | |a 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) |0 G:(DE-HGF)POF4-632 |c POF4-632 |f POF IV |x 0 |
536 | _ | _ | |a VH-NG-1105 - Novel soft X-ray spectroscopies for materials science (2016_IVF-VH-NG-1105) |0 G:(DE-HGF)2016_IVF-VH-NG-1105 |c 2016_IVF-VH-NG-1105 |x 1 |
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700 | 1 | _ | |a Liu, Boyang |b 1 |
700 | 1 | _ | |a Rodrigues, Gabriel L. S. |0 0000-0002-6580-3336 |b 2 |
700 | 1 | _ | |a Liu, Chang |b 3 |
700 | 1 | _ | |a Garrido Torres, Jose Antonio |b 4 |
700 | 1 | _ | |a Schreck, Simon |b 5 |
700 | 1 | _ | |a Diesen, Elias |0 0000-0002-8235-3920 |b 6 |
700 | 1 | _ | |a Weston, Matthew |b 7 |
700 | 1 | _ | |a Ogasawara, Hirohito |b 8 |
700 | 1 | _ | |a Perakis, Fivos |0 0000-0001-9863-9811 |b 9 |
700 | 1 | _ | |a Dell’Angela, Martina |0 0000-0003-1228-2458 |b 10 |
700 | 1 | _ | |a Capotondi, Flavio |b 11 |
700 | 1 | _ | |a Ball, Devon |b 12 |
700 | 1 | _ | |a Carnahan, Conner |b 13 |
700 | 1 | _ | |a Zeri, Gary |b 14 |
700 | 1 | _ | |a Giannessi, Luca |b 15 |
700 | 1 | _ | |a Pedersoli, Emanuele |b 16 |
700 | 1 | _ | |a Naumenko, Denys |b 17 |
700 | 1 | _ | |a Amann, Peter |b 18 |
700 | 1 | _ | |a Nikolov, Ivaylo |b 19 |
700 | 1 | _ | |a Raimondi, Lorenzo |b 20 |
700 | 1 | _ | |a Spezzani, Carlo |b 21 |
700 | 1 | _ | |a Beye, Martin |0 P:(DE-H253)PIP1005334 |b 22 |
700 | 1 | _ | |a Voss, Johannes |b 23 |
700 | 1 | _ | |a Wang, Hsin-Yi |b 24 |
700 | 1 | _ | |a Cavalca, Filippo |b 25 |
700 | 1 | _ | |a Gladh, Jörgen |0 P:(DE-H253)PIP1084379 |b 26 |
700 | 1 | _ | |a Koroidov, Sergey |b 27 |
700 | 1 | _ | |a Abild-Pedersen, Frank |b 28 |
700 | 1 | _ | |a Kolb, Manuel |b 29 |
700 | 1 | _ | |a Miedema, Piter S. |0 P:(DE-H253)PIP1032830 |b 30 |
700 | 1 | _ | |a Costantini, Roberto |b 31 |
700 | 1 | _ | |a Heinz, Tony F. |b 32 |
700 | 1 | _ | |a Luntz, Alan C. |b 33 |
700 | 1 | _ | |a Pettersson, Lars G. M. |b 34 |
700 | 1 | _ | |a Nilsson, Anders |b 35 |
773 | _ | _ | |a 10.1063/5.0114399 |g Vol. 157, no. 16, p. 164705 - |0 PERI:(DE-600)1473050-9 |n 16 |p 164705 |t The journal of chemical physics |v 157 |y 2022 |x 0021-9606 |
856 | 4 | _ | |y Published on 2022-10-25. Available in OpenAccess from 2023-10-25. |u https://bib-pubdb1.desy.de/record/483446/files/5.0114399.pdf |
856 | 4 | _ | |y Published on 2022-10-25. Available in OpenAccess from 2023-10-25. |u https://bib-pubdb1.desy.de/record/483446/files/Accepted%20manuscript.pdf |
856 | 4 | _ | |y Published on 2022-10-25. Available in OpenAccess from 2023-10-25. |x pdfa |u https://bib-pubdb1.desy.de/record/483446/files/Accepted%20manuscript.pdf?subformat=pdfa |
856 | 4 | _ | |y Published on 2022-10-25. Available in OpenAccess from 2023-10-25. |x pdfa |u https://bib-pubdb1.desy.de/record/483446/files/5.0114399.pdf?subformat=pdfa |
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