DOI: 10.1063/1.446047. The influence of adsorbate interactions on kinetics and equilibrium for CO on Ru(001). I. Adsorption kinetics

The influence of adsorbate interactions on kinetics and equilibrium for CO on Ru(001). I. Adsorption kinetics

10.1063/1.446047

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

After careful calibration, the work function change induced by CO adsorption on Ru(001) has been used to measure the sticking coefficient s as functions of sample temperature (between 100 and 400 K) and coverage, with the gas temperature always at about 295 K. The main results are: At θ=0, the sticking coefficient is independent of sample temperature between 100 and 400 K, at s0=0.7 for 0&lt;θ&lt;0.2. s drops proportional to (1–θ) for Ts≳200 K, and more gradually below 200 K; at 100 K, s drops slowly up to θ=0.5. Above θ=0.23 a sharp decrease of s sets in for Ts≳120 K; a second plateau becomes obvious around θ∼0.35 for Ts&lt;360 K. Close to saturation, s drops to below 10−2. These results are discussed in terms of a precursor model with strong effects of the chemisorbed layer on the properties of the precursor. A critical evaluation of the formal precursor states involved suggests that classical precursor states exist only at appreciable coverage and are defined by the lateral and vertical interactions, while at low coverage the collisional dynamics are determined for sticking of molecules.

Bibliography

PfnÃ¼r, H., & Menzel, D. (1983). The influence of adsorbate interactions on kinetics and equilibrium for CO on Ru(001). I. Adsorption kinetics. The Journal of Chemical Physics, 79(5), 2400â2410.

Authors 2

H. Pfnür (first)
D. Menzel (additional)

References 33 Referenced 163

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Dates

Type	When
Created	22 years, 6 months ago (Feb. 28, 2003, 12:03 p.m.)
Deposited	1 year, 6 months ago (Feb. 9, 2024, 8:25 p.m.)
Indexed	1 year, 5 months ago (March 16, 2024, 1:09 a.m.)
Issued	41 years, 11 months ago (Sept. 1, 1983)
Published	41 years, 11 months ago (Sept. 1, 1983)
Published Print	41 years, 11 months ago (Sept. 1, 1983)

Funders 0

None

BibTeX

@article{Pfn_r_1983, title={The influence of adsorbate interactions on kinetics and equilibrium for CO on Ru(001). I. Adsorption kinetics}, volume={79}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.446047}, DOI={10.1063/1.446047}, number={5}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Pfnür, H. and Menzel, D.}, year={1983}, month=sep, pages={2400–2410} }

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