Happel M, Luckas N, Vines Solana F, Sobota M, Laurin M, Görling A, Libuda J (2011)
Publication Type: Journal article, Original article
Publication year: 2011
Original Authors: Happel M., Luckas N., Vines F., Sobota M., Laurin M., Görling A., Libuda J.
Publisher: American Chemical Society
Book Volume: 115
Pages Range: 479-491
Journal Issue: 2
DOI: 10.1021/jp107171t
We have performed a combined molecular beam (MB)/infrared reflection absorption spectroscopy (IRAS) and density functional (DF) study on the adsorption of sulfur dioxide (SO) on clean and oxygen precovered Pt(111). The adsorbate species formed as a function of coverage and their structural and chemical transformations upon subsequent annealing were followed systematically by IRAS. It is shown that, upon adsorption on clean Pt(111) at 100 K, SO adsorbs molecularly in two geometries. Calculations reveal that these geometries correspond to molecules oriented parallel or perpendicular to the surface. Upon heating up to 250 K, conversion between the two species occurs with the fraction of upright standing SO increasing with increasing temperature. Between 300 and 350 K, all surface species desorb without decomposition. This is in sharp contrast to oxygen precovered Pt(111), on which, in addition to the formation of molecular SO in flat and perpendicular geometry, partial formation of SO is observed even at low temperature. Upon annealing, part of the surface SO species are converted to SO and, subsequently, to SO, which remains stable up to 450 K. DF calculations on the stable adsorption structures of SO species provide characteristic IR frequencies, which can be correlated with the present IRAS data and photoelectron spectroscopy (PES) data previously published. © 2010 American Chemical Society.
APA:
Happel, M., Luckas, N., Vines Solana, F., Sobota, M., Laurin, M., Görling, A., & Libuda, J. (2011). SO2 adsorption on Pt(111) and oxygen precovered Pt(111): A combined infrared reflection absorption spectroscopy and density functional study. Journal of Physical Chemistry C, 115(2), 479-491. https://dx.doi.org/10.1021/jp107171t
MLA:
Happel, Markus, et al. "SO2 adsorption on Pt(111) and oxygen precovered Pt(111): A combined infrared reflection absorption spectroscopy and density functional study." Journal of Physical Chemistry C 115.2 (2011): 479-491.
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