Photoreactions of adsorbed CH3Br on Pt(111)

Radhakrishnan, Ganesan; Stenzel, W.; Conrad, H.; Bradshaw, Alexander M.

doi:10.1016/0169-4332(90)90117-i

Cited by 10 publications

(1 citation statement)

References 21 publications

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“…Some experimental and theoretical investigations [11,16,[28][29][30][31][32] carried out on fcc(1 1 1) surfaces showed that CH 3 adopted a C 3v symmetry and tilting the molecule from C 3v to C s symmetry was not energetically favorable, while others [33][34][35] have suggested that the symmetry is only C s . Recently, the adsorption of methyl species on Cu(1 1 1) has been investigated by Pascal et al using scanned energy mode photoelectron diffraction [21].…”

Section: Introductionmentioning

confidence: 99%

A DFT investigation of the adsorption of methyl on Rh(111)

Xiao

Xie

2004

Surface Science

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Section: Introductionmentioning

confidence: 99%

A DFT investigation of the adsorption of methyl on Rh(111)

Xiao

Xie

2004

Surface Science

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The heterogeneous interaction of Br(²P_3/2) and Br(²P_1/2) with surfaces of Teflon™ and polycrystalline nickel

Müller‐Markgraf

Rossi

1995

Int J of Chemical Kinetics

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Pulses of Br('P312) and Br('P1/2) (=Br*) have been exposed to Teflon (PTFE) and to polycrystalline Ni surfaces in a Knudsen cell. The Br and Br* atom densities have been measured as a function of time using [3 + 21 Resonance Enhanced Multiphoton Ionization (REMPI) at 461.9 and 459.1 nm, respectively, and an absolute calibration of the sum of the density of Br and Br* has been obtained using molecular beam modulated mass spectrometry. The uptake coefficient of Br and Br* on Teflon a t ambient temperature has been measured to result in identical values within experimental error for both Br and Br*, namely y(Br) = (5.6 2 1.5) .if an appropriate correction for the radiative lifetime of Br* of 0.77 s-l is applied. The uptake coefficients for Br and Br* on polycrystalline Ni seem to be identical: y(Br) = y(Br*) = (5.6 ? 1.8) .and independent of temperature in the range 295 to 500 K. A possible exception is the value for y(Br*) of 2.3 .at T = 295 K which seems to be significantly lower than the remainder of the uptake data. In the temperature range 500 to 700 K the uptake coefficients for both Br and Br* can be expressed as y = 0.18. exp(-3300/RT), R = 1.987 cal mo1-lK-lThe system has a small positive activation energy in the range 3.3 to 4.5 kcal/mol. Br* seems to be less reactive than C1* with respect to surface deactivation on poly Ni by a factor of six. In analogy to C1 the present system is characterized by kinetic complications in conjunction with the reversible surface poisoning of bromine, both atomic and molecular, on surfaces of Teflon (PTFE) and poly Ni that leads to the decrease of Br and Br* uptake with increasing exposure. 0 1995 John Wiley & Sons, Inc.

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Photostimulated chemistry at the metal-adsorbate interface

Hasselbrink

1991

Appl. Phys. A

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The ultraviolet photochemistry of molecules adsorbed on metallic surfaces has been studied using excimer lasers as radiation source. Dissociation with the fragments either ejected into the gas phase or retained on the surface is one prominent channel. The other is photodesorption of intact molecules. The desorbing molecules are characterized by time-of-flight mass spectroscopy and laser spectroscopy. The state of the adsorbate after irradiation is characterized by thermal desorption spectroscopy and high resolution electron energy loss spectroscopy. The methods and fundamental characteristics are exemplified using results from three studied systems: 02, H20, and N204 adsorbed on Pd(lll).

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Photoreactions of adsorbed CH3Br on Pt(111)

Cited by 10 publications

References 21 publications

A DFT investigation of the adsorption of methyl on Rh(111)

A DFT investigation of the adsorption of methyl on Rh(111)

The heterogeneous interaction of Br(²P_3/2) and Br(²P_1/2) with surfaces of Teflon™ and polycrystalline nickel

Photostimulated chemistry at the metal-adsorbate interface

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Photoreactions of adsorbed CH3Br on Pt(111)

Cited by 10 publications

References 21 publications

A DFT investigation of the adsorption of methyl on Rh(111)

A DFT investigation of the adsorption of methyl on Rh(111)

The heterogeneous interaction of Br(2P3/2) and Br(2P1/2) with surfaces of Teflon™ and polycrystalline nickel

Photostimulated chemistry at the metal-adsorbate interface

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The heterogeneous interaction of Br(²P_3/2) and Br(²P_1/2) with surfaces of Teflon™ and polycrystalline nickel