The adsorption kinetics of n-pentane, thiophene, and benzene on WS2 nanotubes have been studied by thermal desorption spectroscopy (TDS). First evidence is obtained that these probe molecules adsorb on internal, external, and groove sites of the nanotubes. Reactive TDS experiments reveal some catalytic activity towards hydrodesulfurization of thiophene.
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Discussion and critical reading of the draft by R. Tenne are acknowledged. We thank C. Shahar and R. Tenne (Weizmann Institute, Israel) as well as M. Lu (now at Brookhaven National Laboratory, USA) for the SEM analysis. P. Nevin (Linköping University, Sweden) acknowledges a student exchange fellowship from North Dakota State University. Financial support from the Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, Office of Science, US Department of Energy is acknowledged (Project DE-FG02-08ER15987).