Determination of adsorption sites of pure and coadsorbed CO on Ni(111) by high resolution X-ray photoelectron spectroscopy
Held G, Schuler J, Sklarek W, Steinrück HP (1998)
Publication Type: Journal article
Publication year: 1998
Journal
Original Authors: Held G., Schuler J., Sklarek W., Steinrück H.-P.
Publisher: Elsevier
Book Volume: 398
Pages Range: 154-171
DOI: 10.1016/S0039-6028(98)80020-4
Abstract
O 1s and C 1s peak positions from high resolution X-ray photoelectron spectroscopy were used to determine adsorption sites of CO and CO coadsorbed with O and benzene, respectively, on Ni(111). Pure CO layers at 80 K were characterised by low energy electron diffraction and temperature programmed desorption and studied by X-ray photoelectron spectroscopy in a wide coverage range. For low coverages up to the well-known c(4 × 2) structure (Θ = 0.5 ML) the CO resides on threefold hollow sites. In the p(√7 × √7)R19° structure (Θ = 0.57 ML) the on-top and bridge sites are occupied; for the compressed c(2√3×4) rect structure (Θ = 0.62 ML) there is no clear preference for high symmetry adsorption sites. At room temperature the additional occupation of on-top and bridge sites is even observed at low coverages. In the p(2√3 × 2√3) R30° (benzene+ 2CO) structure the CO resides most likely on threefold hollow sites with benzene molecules occupying the same adsorption sites. After the adsorption onto a p(2 × 2) oxygen layer at about 100 K the CO occupies two sites: on-top and bridge or hollow sites. If this layer is annealed to 260 K only the on-top sites are left on the surface. © 1998 Elsevier Science B.V.
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APA:
Held, G., Schuler, J., Sklarek, W., & Steinrück, H.-P. (1998). Determination of adsorption sites of pure and coadsorbed CO on Ni(111) by high resolution X-ray photoelectron spectroscopy. Surface Science, 398, 154-171. https://doi.org/10.1016/S0039-6028(98)80020-4
MLA:
Held, Georg, et al. "Determination of adsorption sites of pure and coadsorbed CO on Ni(111) by high resolution X-ray photoelectron spectroscopy." Surface Science 398 (1998): 154-171.
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