Funk S (2005)
Publication Type: Journal article
Publication year: 2005
Book Volume: 123
Journal Issue: 20
DOI: 10.1063/1.2126668
Initial, S-0, as well as coverage-dependent adsorption probability measurements, S(Theta), have been conducted at normal impact angle and as a function of the impact energy of CO2, E-i, adsorption temperature, T-s, and copper precoverage, Theta(Cu) (at 300 K). S-0, which decreased from similar to 0.4 exponentially to similar to 0.05 with E-i was independent of Theta(Cu). Astonishingly, S-0 for Cu on ZnO(0001)-Zn is smaller than for the clean support which indicates a chemical modification of the support by the Cu deposits. S(Theta) curves consist of two regimes, a Kisliuk-type and Langmuirian-type section. The first is consistent with capture zone models; the second may indicate direct adsorption of CO2 on the Cu cluster. The thermal-desorption (TDS) curves for Cu on ZnO(0001)-Zn consist of two structures with binding energies of 26 and similar to 40 kJ/mol (nu=1x10(13) l/s). The TDS results indicate that CO2 populates predominantly the Cu deposits and the rim along the Cu nanoparticles. No indications for CO2 dissociation could be obtained with Auger electron spectroscopy. (c) 2005 American Institute of Physics.
APA:
Funk, S. (2005). Adsorption dynamics of CO2 on copper-precovered ZnO(0001)-Zn: A molecular-beam scattering and thermal-desorption spectroscopy study. Journal of Chemical Physics, 123(20). https://doi.org/10.1063/1.2126668
MLA:
Funk, Stefan. "Adsorption dynamics of CO2 on copper-precovered ZnO(0001)-Zn: A molecular-beam scattering and thermal-desorption spectroscopy study." Journal of Chemical Physics 123.20 (2005).
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