Interaction of CO with Oxygen Adatoms on TiO₂ (110)

Journal Article · Thu Mar 17 00:00:00 EDT 2011 · Journal of Physical Chemistry. C

DOI:https://doi.org/10.1021/jp1112697· OSTI ID:1015219

Lee, Junseok ^[1]; Zhang, Zhen ^[2]; Deng, Xingyi ^[1]; Sorescu, Dan C. ^[1]; Matranga, Christopher ^[1]; Yates, John T. ^[2]

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1. National Energy Technology Lab. (NETL), Pittsburgh, PA, (United States)
2. Univ. of Virginia, Charlottesville, VA (United States) Dept. of Chemistry

The interaction between CO and O adsorbed on TiO₂(110) has been investigated using scanning tunneling microscopy (STM), electron stimulated desorption (ESD), temperature programmed desorption (TPD), and density functional theory (DFT). Coadsorption of CO and O produces CO-O and CO-O-CO surface complexes via weak attractive interaction as revealed by STM and DFT. The effect of the adsorbates interaction can also be observed in two ensemble-averaged techniques, ESD and TPD, strongly supporting the STM and DFT results. The CO molecules adsorbed near chemisorbed O cause a ~70% decrease in the O⁺ ion yield in ESD. The interaction between CO and O is considered to be electrostatic in nature due to the charge rearrangement upon chemisorption.

• Research Organization: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
• Sponsoring Organization: USDOE Assistant Secretary for Fossil Energy (FE)
• OSTI ID: 1015219
• Report Number(s): NETL-TPR3330
• Journal Information: Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 10 Vol. 115; ISSN 1932-7447
• Publisher: American Chemical Society
• Country of Publication: United States
• Language: English

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