Denecke R, Tränkenschuh B, Engelhardt MP, Steinrück HP (2003)
Publication Type: Journal article
Publication year: 2003
Original Authors: Denecke R., Tränkenschuh B., Engelhardt M.P., Steinrück H.-P.
Publisher: Elsevier
Pages Range: 173-178
Event location: Malmo
DOI: 10.1016/S0039-6028(03)00170-5
We report on sticking coefficient measurements for CO adsorption at 90 K on differently prepared Cr layers on Ru(0 0 0 1). Using a supersonic molecular beam we study initial and coverage-dependent sticking coefficients, S and S(θ), respectively, as function of the kinetic energy of the CO molecules. For a pseudomorphic Cr monolayer (prepared at 700 K), S decreases from 0.93 for low kinetic energies (0.09 eV) to 0.82 at 0.4 eV, and stays unchanged for higher kinetic energies up to 2.15 eV. In contrast, on a Cr/Ru surface alloy (for Cr deposition at 1000 K) S closely follows the behavior of clean Ru(0 0 0 1), decreasing from 0.93 to about 0.6 for 2.15 eV. The coverage-dependent sticking coefficients at low kinetic energies show pronounced precursor-mediated behavior, while for higher kinetic energies a Langmuir-like adsorption kinetics is found, which is most prominent for the Cr monolayer. © 2003 Elsevier Science B.V. All rights reserved.
APA:
Denecke, R., Tränkenschuh, B., Engelhardt, M.P., & Steinrück, H.-P. (2003). Adsorption kinetics of CO on Cr/Ru surfaces. Surface Science, 173-178. https://doi.org/10.1016/S0039-6028(03)00170-5
MLA:
Denecke, Reinhard, et al. "Adsorption kinetics of CO on Cr/Ru surfaces." Surface Science (2003): 173-178.
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