Abstract
The adsorption kinetics of thiophene on WS2 nanoparticles with fullerene-like (onion-like) structure has been studied at ultra-high vacuum conditions by sample temperature ramping techniques. At low temperatures, thiophene adsorbs molecularly. The formation of H2S and alkanes is evident at greater temperatures on fully sulfided as well as reduced and oxidized WS2 nanoparticles.
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Notes
Alkane formation rates were detectable only above 600 K. At these large surface temperatures the coverage of the reactants on the surface is very small which limits the product formation rates. This problem can be overcome by increasing the gas pressure of the reactants in a high-pressure chemical reactor.
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Acknowledgments
NDSU acknowledges financial support through an NSF-CAREER (CHE-0743932) Grant and by the DoE (“Catalyis and Chemical Transformation”—FAR0013206). Work was also performed in the Environmental Molecular Sciences Laboratory, a national scientific user facility sponsored by the DoE. RT acknowledges the support of “NanoMaterials, Ltd.” and the H. Perlman Foundation and the Moskowitz Center for Bio-Nano Imaging of the Weizmann Institute. RT is the director of the Helen and Martin Kimmel center for Nanoscale Science and holds the Drake Family Chair in Nanotechnology.
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Goering, J., Burghaus, U., Arey, B.W. et al. Reactive and Non-reactive Interactions of Thiophene with WS2 Fullerene-like Nanoparticles: An Ultra-high Vacuum Surface Chemistry Study. Catal Lett 125, 236–242 (2008). https://doi.org/10.1007/s10562-008-9565-7
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DOI: https://doi.org/10.1007/s10562-008-9565-7