Kinne M, Fuhrmann T, Zhu J, Tränkenschuh B, Denecke R, Steinrück HP (2004)
Publication Type: Journal article
Publication year: 2004
Original Authors: Kinne M., Fuhrmann T., Zhu J.F., Tränkenschuh B., Denecke R., Steinrück H.-P.
Publisher: American Chemical Society
Book Volume: 20
Pages Range: 1819-1826
Journal Issue: 5
DOI: 10.1021/la035913w
The adsorption of DO on Pt(111) and the coadsorption with CO have been revisited by quantitative and in situ high-resolution X-ray photoelectron spectroscopy (XPS). During DO adsorption at 110 K, O 1s spectra clearly show the known formation of a bilayer and multilayers. As indicated by a binding energy change of the multilayer peak in the XP spectra recorded during heating, a structural change in the DO multilayer at the onset of multilayer desorption (∼145 K) is observed. Coadsorption of CO and DO leads to occupation of bridge and on-top sites by CO, with the order in site occupation reversed as compared to the clean surface, as previously observed. In addition, a new CO species is clearly resolved in C 1s spectra, which may be identified with CO on hollow sites. Upon DO desorption, this new species disappears and the CO site occupation changes to the value observed on the clean Pt(111). Induced by CO coadsorption, partial replacement of DO from the surface into higher layers is observed, indicated by a reduced desorption temperature of water and an O 1s binding energy shift toward the value of the multilayer signal. Our results suggest an intermixed first layer of CO and DO molecules; DO on top of this layer also influences the CO site distribution. On a surface precovered with 0.5 monolayer (ML) of CO, DO molecules can only adsorb on top of the CO layer and no mixed layer is formed; hence, no site change is observed. The preadsorbed DO bilayer lowers the initial CO sticking coefficient by a factor of ∼13 as compared to the clean surface; this reduction is larger than previously detected.
APA:
Kinne, M., Fuhrmann, T., Zhu, J., Tränkenschuh, B., Denecke, R., & Steinrück, H.-P. (2004). Coadsorption of D2O and CO on Pt(111) studied by in situ high-resolution x-ray photoelectron spectroscopy. Langmuir, 20(5), 1819-1826. https://doi.org/10.1021/la035913w
MLA:
Kinne, Martin, et al. "Coadsorption of D2O and CO on Pt(111) studied by in situ high-resolution x-ray photoelectron spectroscopy." Langmuir 20.5 (2004): 1819-1826.
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