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- W2000481149 abstract "The adsorption of hydrogen on single-walled carbon nanotubes was measured using micro-gravimetric nitrogen and hydrogen adsorption isotherms at 77 K for gas pressures of up to 1 bar (nitrogen) and 12 bar (hydrogen). Results show that surface area and hydrogen uptake depend on the concentration of the iron catalyst used for making the nanotubes. Langmuir fits to the hydrogen uptake curves clearly show two adsorption energies for each sample which we attribute to the groove site for the higher adsorption energy and to the convex tube surface for the lower energy. We also present calculations of the binding energy of hydrogen on these same sites on SWCNTs and confirm that the groove site has a significantly higher (radius-dependent) binding energy than the surface site, consistent with the experimental values. This suggests that the use of the Langmuir model is appropriate to the adsorption of H2 on activated carbons for the temperature and pressure range investigated and could be used as a rapid way of estimating the average tube radius in the sample." @default.
- W2000481149 created "2016-06-24" @default.
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- W2000481149 date "2009-11-01" @default.
- W2000481149 modified "2023-09-24" @default.
- W2000481149 title "The dependence of the hydrogen sorption capacity of single-walled carbon nanotubes on the concentration of catalyst" @default.
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- W2000481149 doi "https://doi.org/10.1016/j.carbon.2009.07.030" @default.
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