| AVS 55th International Symposium & Exhibition | |
| Graphene Topical Conference | Tuesday Sessions |
| Session GR-TuP |
| Session: | Graphene Poster Session |
| Presenter: | U. Burghaus, North Dakota State University |
| Authors: | J. Goering, North Dakota State University M. Komarneni, North Dakota State University U. Burghaus, North Dakota State University |
| Correspondent: | Click to Email |
Carbon nanotubes can be used as supports for applications such as direct liquid fuel cell catalysts. The adsorption kinetics of alkanes (butane, pentane, hexane, trimethylpentane) and alcohols (methanol, ethanol, propanol, 2-propanol, butanol, pentanol, and hexanol) on single wall carbon nanotubes (HiPco-CNTs) supported on silica has been studied by thermal desorption spectroscopy (TDS). Multi-mass TDS indicate molecular adsorption/desorption with low coverage binding energies increasing linearly with the size of the alcohols. The coverage dependence of the heat of adsorption has been determined by a Redhead analysis. The heat of sublimation, determined by a leading edge analysis, increases linearly with the size of the alcohols whereas the zero order pre-exponential factor is approx. independent of the molecular size. Coadsorption TDS of alcohol-alkane mixtures indicate adsorption of these molecules inside of the CNTs. Adsorption probabilities of alkanes measured by molecular beam scattering increase while opening the CNT tube ends by annealing fresh samples. First results on CoMoCAT CNTs are presented in order to address a possible structure activity relationship.