Adsorption states of benzene and toluene on Pt(111): A vibrational EELS, Δφ, AES and TDS study

Abon, M.; Bertolini, J.C.; Billy, J.; Massardier, J.; Tardy, B.

doi:10.1016/0039-6028(85)90926-4

Cited by 100 publications

(86 citation statements)

References 14 publications

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“…The weak readsorption at 350 K shows that no free Pt is left and that the graphitic layer is closed. The temperature ranges for decomposition and coking are quite similar to those found for benzene and toluene [6]. The preceeding polymerization has, of course, not been observed for these gases.…”

Section: 4supporting

confidence: 68%

“…When adsorbed alone, it was found to be deformed with different expanded C-C bonds and a buckling distortion of the ring [5]. The interaction of benzene and toluene with Pt(111) have been compared using thermal desorption spectroscopy (TDS) [6]. The first half monolayer of benzene decomposes by dehydrogenation whereas the second half monolayer desorbs intact.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption and thermal decomposition of ethylbenzene and styrene on Pt(111) studied by UPS and XPS

Ranke

Weiß

2000

Surface Science

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We must sadly report that Werner Weiss passed away before the completion of this work. AbstractThe interaction of ethylbenzene (EB) and styrene with Pt(111) was studied by UPS and XPS for adsorption temperatures between 135 K and 870 K. Below 350 K, styrene chemisorbs strongly and the work function decreases by more than 2 eV indicating strong polarization or charge transfer. This is accompanied by different bonding shifts of the π and σ orbitals towards smaller binding energy. After saturation of the chemisorbed layer, physisorption and finally condensation in form of clusters is observed. The isosteric heats of adsorption for physisorbed and condensed styrene are 61 kJ/mol and 58.5 kJ/mol, respectively. The first EB layer dissociates into chem isorbed styrene and hydrogen atoms. The following physisorbed and condensed layers consist of undissociated EB. Upon annealing in EB or styrene atmosphere, chemisorbed γ-styrene polymerizes at about 400 K with a saturation coverage slightly above one monolayer. Upon further annealing the layer starts to decompose and beyond 700 K it forms a graphitic coke layer. Annealing of a γ-styrene layer without further gas admission yields the same species but with lower coverages.

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Section: 4supporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Adsorption and thermal decomposition of ethylbenzene and styrene on Pt(111) studied by UPS and XPS

Ranke

Weiß

2000

Surface Science

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“…31,33,36,43 This gave values ranging from 133 kJ/mol 36 to 121 kJ/mol. 43 It was assumed that the adsorption energy approximately equals this activation energy, giving It should be noted that these values are for ∼0.8 ML initial coverage.…”

Section: Introductionmentioning

confidence: 99%

Calorimetric Measurement of the Heat of Adsorption of Benzene on Pt(111)

et al. 2004

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The heat of adsorption of benzene on clean Pt(111) at 300 K is measured calorimetrically and found to decrease with coverage (θ) as (197 -48θ -83θ 2 ) kJ/mol. Saturation coverage (θ ) 1.0) is 2.3 × 10 14 molecules/cm 2 . Sticking probabilities of benzene on Pt(111) were measured by mass spectrometry, giving an initial value of 0.97 and showing Kisliuk-type behavior with increasing coverage that implies there is a precursor to sticking with a ratio of its hopping rate to its desorption rate of ∼28. Benzene adsorbs transiently on the benzene-saturated surface at 300 K with a trapping probability of 0.90 and a heat of adsorption of 63-73 kJ/mol.

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“…Experimentally, it was observed that C 6 H 6 completely desorbs from the Pt surfaces at 227 • C [50]. C 7 H 8 becomes more strongly bonded than C 6 H 6 on Pt(111) even at the low temperature of 300 K [51].…”

Section: Sensing Mechanismsmentioning

confidence: 97%

Selective detection of low concentration toluene gas using Pt-decorated carbon nanotubes sensors

Kwon

Kang

et al. 2016

Sensors and Actuators B: Chemical

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Adsorption states of benzene and toluene on Pt(111): A vibrational EELS, Δφ, AES and TDS study

Cited by 100 publications

References 14 publications

Adsorption and thermal decomposition of ethylbenzene and styrene on Pt(111) studied by UPS and XPS

Adsorption and thermal decomposition of ethylbenzene and styrene on Pt(111) studied by UPS and XPS

Calorimetric Measurement of the Heat of Adsorption of Benzene on Pt(111)

Selective detection of low concentration toluene gas using Pt-decorated carbon nanotubes sensors

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