Adsorption dynamics of CO2 on copper-precovered ZnO(0001)–Zn: A molecular-beam scattering and thermal-desorption spectroscopy study

2005 ◽  
Vol 123 (20) ◽  
pp. 204710 ◽  
Author(s):  
J. Wang ◽  
S. Funk ◽  
U. Burghaus
Keyword(s):  
Thermal Desorption ◽  
Molecular Beam ◽  
Thermal Desorption Spectroscopy ◽  
Spectroscopy Study ◽  
Molecular Beam Scattering ◽  
Adsorption Dynamics ◽  
Beam Scattering

ADSORPTION DYNAMICS OFCO2ON HYDROGEN PRECOVEREDZn-ZnO(0001): A MOLECULAR BEAM STUDY

2004 ◽  
Vol 11 (06) ◽  
pp. 521-529 ◽  
Author(s):  
J. WANG ◽  
U. BURGHAUS
Keyword(s):  
Monte Carlo ◽  
Binding Energy ◽  
Thermal Desorption ◽  
Impact Energy ◽  
Atomic Hydrogen ◽  
Molecular Beam ◽  
Thermal Desorption Spectroscopy ◽  
Adsorption Dynamics ◽  
Site Blocking ◽  
The Impact

Presented are initial, S0, and coverage, Θ, dependent, S(Θ), adsorption probability measurements, respectively, of CO2adsorption on a hydrogen precovered, polar, Zn -terminated surface of ZnO , parametric in the impact energy, Ei, and atomic hydrogen precoverage, ΘH. Furthermore, CO2Thermal Desorption Spectroscopy has been used to estimate ΘHas well as the binding energy of CO2on H / Zn - ZnO . The S(Θ) curves are below Ei=0.56 eV , consistent with precursor-mediated adsorption (S~ const ), and above that impact energy with adsorbate-assisted adsorption (S increases with Θ). Although a decrease in the CO2binding energy from 32.5 to 28.8 kJ/mol with ΘHis present, S(Θ, ΘH) curves are consistent with a physical site blocking, as demonstrated by Monte Carlo Simulations.

Inelastic Collision Processes of Methane and Ethane Molecules at a Pt(111) Surface Studied by Molecular Beam Scattering Techniques

1999 ◽  
Vol 38 (Part 1, No. 12A) ◽  
pp. 6910-6914 ◽  
Author(s):  
Shinjiro Yagyu ◽  
Yasunobu Kino ◽  
Toshiyuki Ikeuchi ◽  
Tomomi Hiraoka ◽  
Takahiro Kondo ◽  
...  
Keyword(s):  
Molecular Beam ◽  
Inelastic Collision ◽  
Molecular Beam Scattering ◽  
Beam Scattering ◽  
Collision Processes
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