The sticking probabilities of gases chemisorbed on the surfaces of solids

Kisliuk, P.

doi:10.1016/0022-3697(57)90054-9

Cited by 605 publications

(225 citation statements)

References 14 publications

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“…Coverages of CO are expressed as monolayers ͑adsorbate/metal substrate surface atom͒. The general shape and peak positions of the spectra agree with those reported previously by de Jong et al 14 Also the CO uptake curve ͑not shown͒ is similar to the uptake curve presented in the former study and is best described by the precursor model by Kisliuk,15 indicating that CO adsorbs via a mobile precursor state. 14 At low coverage ( CO Ͻ0.10 ML), CO desorbs with a maximum rate around 500 K which is 10 K higher than measured by de Jong et al 14 This can be explained by the lower heating rate ͑␤ϭ3.5 K/s͒ applied in the former study.…”

Section: A Desorption Of Co From Rh"100…supporting

confidence: 85%

Quantification of lateral repulsion between coadsorbed CO and N on Rh(100) using temperature-programmed desorption, low-energy electron diffraction, and Monte Carlo simulations

Bavel

Hopstaken

Curulla

et al. 2003

The Journal of Chemical Physics

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Temperature programmed desorption of CO coadsorbed with atomic N on Rh͑100͒, reveals both long-and short-range interactions between adsorbed CO and N. For CO desorption from Rh͑100͒ at low coverage we find an activation energy E a of 137Ϯ2 kJ/mol and a preexponential factor of 10 13.8Ϯ0.2 s Ϫ1 . Coadsorption with N partially blocks CO adsorption and destabilizes CO by lowering E a for CO desorption. Destabilization at low N coverage is explained by long-range electronic modification of the Rh͑100͒ surface. At high N and CO coverage, we find evidence for a short-range repulsive lateral interaction between CO ads and N ads in neighboring positions. We derive a pairwise repulsive interaction CO-N NN ϭ19 kJ/mol for CO coadsorbed to a c͑2ϫ2͒ arrangement of N atoms. This has important implications for the lateral distribution of coadsorbed CO and N at different adsorbate coverages. Regarding the different lateral interactions and mobility of adsorbates, we propose a structural model which satisfactorily explains the observed effects of atomic N on the desorption of CO. Dynamic Monte Carlo simulations were used to verify the experimentally obtained value for the CO-N interaction, by using the kinetic parameters and interaction energy derived from the temperature-programmed desorption experiments.

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Section: A Desorption Of Co From Rh"100…supporting

confidence: 85%

Quantification of lateral repulsion between coadsorbed CO and N on Rh(100) using temperature-programmed desorption, low-energy electron diffraction, and Monte Carlo simulations

Bavel

Hopstaken

Curulla

et al. 2003

The Journal of Chemical Physics

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“…Chemisorption can occur directly or via the intrinsic precursor state. Based on these assumptions, the dependence of the sticking coefficient on the surface coverage was derived by Kisliuk to be [107]: 16) where the constant K is given by the probabilites indicated in Fig. 2.4: The coverage-independent sticking coefficient and the linear Langmuir behavior are contained as limiting cases in the Kisliuk model, since s(Θ)=s 0 for K=0, and s(Θ)=s 0 (1-Θ ) for K=1.…”

Section: Sticking Cofficientsmentioning

confidence: 99%

“…Only for the special case of dissociative adsorption, f(Θ)=(1-Θ) 2 , but quasi-first-order desorption (n=1) because of immobile dissociated species, a solution can be derived: Kisliuk model [106,107]. Parameter K is explained in text.…”

Section: Sticking Cofficientsmentioning

confidence: 99%

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Surface chemistry and catalysis on well-defined epitaxial iron-oxide layers

Weiß

Ranke

2002

Progress in Surface Science

581

610

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Metal-oxide based catalysts are used for many important synthesis reactions in the chemical industry. A better understanding of the catalyst operation can be achieved by studying elemantary reaction steps on well-defined model catalyst systems. For the dehydrogenation of ethylbenzene to styrene in the presence of steam both unpromoted and potassium promoted iron-oxide catalysts are active. Here we review the work done over unpromoted single-crystalline FeO(111), Fe 3 O 4 (111) and α-Fe 2 O 3 (0001) films grown epitaxially on Pt(111) substrates. Their geometric and electronic surface structures were characterized by STM, LEED, electron microscopy and electron spectroscopic techniques. In an integrative approach, the interaction of water, ethylbenzene and styrene with these films was investigated mainly by thermal desorption and photoelectron emission spectroscopy. The adsorptiondesorption energetics and kinetics depend on the oxide surface terminations and are correlated to the electronic structures and acid-base properties of the corresponding oxide phases, which reveal insight into the nature of the active sites and into the catalytic function of semiconducting oxides in general. Catalytic studies, using a batch reactor arrangement at high gas pressures and post reaction surface analysis, showed that only α-Fe 2 O 3 (0001) containing surface defects is catalytically active, whereas Fe 3 O 4 (111) is always inactive. This can be related to the elementary adsorption and desorption properties observed in ultrahigh vacuum, which indicates that the surface chemical properties of the iron-oxide films do not change significantly across the "pressure-gap". A model is proposed according to which the active site involves a regular acidic surface sites and a defect site next to it. The results on metal-oxide surface chemistry also have implications for other fields, such as environmental science, biophysics and chemical sensors.-2 -"2kyEi9FYSQjBVrZxIPQ.FHIAC_WRa02_review.doc", Datum: 19.02.03

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“…However, since at a given temperature, the fractional coverages are precisely determined by the equilibrium between the two sites, the total coverage, , can be used without loss of information. Adsorption is commonly described with the Kisliuk model, which considers direct chemisorption on the bare surface and precursormediated adsorption on adsorbate-covered regions 34 :…”

Section: Measurements and Data Analysismentioning

confidence: 99%

Ultrafast x-ray photoelectron spectroscopy in the microsecond time domain

Höfert

Gleichweit

Steinrück

et al. 2013

Review of Scientific Instruments

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Articles you may be interested in Light-induced changes in an alkali metal atomic vapor cell coating studied by X-ray photoelectron spectroscopy J. Appl. Phys. 114, 094513 (2013) We introduce a new approach for ultrafast in situ high-resolution X-ray photoelectron spectroscopy (XPS) to study surface processes and reaction kinetics on the microsecond timescale. The main idea is to follow the intensity at a fixed binding energy using a commercial 7 channeltron electron analyzer with a modified signal processing setup. This concept allows for flexible switching between measuring conventional XP spectra and ultrafast XPS. The experimental modifications are described in detail. As an example, we present measurements for the adsorption and desorption of CO on Pt(111), performed at the synchrotron radiation facility BESSY II, with a time resolution of 500 μs. Due to the ultrafast measurements, we are able to follow adsorption and desorption in situ at pressures of 2 × 10 −6 mbar and temperatures up to 500 K. The data are consistently analyzed using a simple model in line with data obtained with conventional fast XPS at temperatures below 460 K. Technically, our new approach allows measurement on even shorter timescales, down to 20 μs. © 2013 AIP Publishing LLC. [http://dx

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The sticking probabilities of gases chemisorbed on the surfaces of solids

Cited by 605 publications

References 14 publications

Quantification of lateral repulsion between coadsorbed CO and N on Rh(100) using temperature-programmed desorption, low-energy electron diffraction, and Monte Carlo simulations

Quantification of lateral repulsion between coadsorbed CO and N on Rh(100) using temperature-programmed desorption, low-energy electron diffraction, and Monte Carlo simulations

Surface chemistry and catalysis on well-defined epitaxial iron-oxide layers

Ultrafast x-ray photoelectron spectroscopy in the microsecond time domain

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