WFRF:(Mortensen J. J.)
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Density functional study of the adsorbtion and van der Waals binding of aromatic and conjugated compounds on the basal plane of MoS2
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- Moses, PG (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- Mortensen, J. J. (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- Lundqvist, Bengt, 1938 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- (creator_code:org_t)
- AIP Publishing, 2009
- 2009
- English.
- In: Journal of Chemical Physics. - : AIP Publishing. - 1089-7690 .- 0021-9606. ; 130:10, s. 104709-
- Journal article (peer-reviewed)
Abstract
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- Accurate calculations of adsorption energies of cyclic molecules are of key importance in investigations of, e.g., hydrodesulfurization (HDS) catalysis. The present density functional theory (DFT) study of a set of important reactants, products, and inhibitors in HDS catalysis demonstrates that van der Waals interactions are essential for binding energies on MoS2 surfaces and that DFT with a recently developed exchange-correlation functional (vdW-DF) accurately calculates the van der Waals energy. Values are calculated for the adsorption energies of butadiene, thiophene, benzothiophene, pyridine, quinoline, benzene, and naphthalene on the basal plane of MoS2, showing good agreement with available experimental data, and the equilibrium geometry is found as flat at a separation of about 3.5 Å for all studied molecules. This adsorption is found to be due to mainly van der Waals interactions. Furthermore, the manifold of adsorption-energy values allows trend analyses to be made, and they are found to have a linear correlation with the number of main atoms. © 2009 American Institute of Physics.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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