Abstract
Adsorption isotherms of H2 and D2 deposited on single wall, closed end carbon nanotube bundles have been measured. Two temperature ranges were covered, a) T>77 K to study adsorption on high energy binding sites, and b) T<45 K to characterize adsorption on the graphite-like (graphene) outside surface of the bundles. For reference, N2 and Ar isotherms were measured at T>77 K. We observe two well defined steps in the isotherms that correspond to adsorption on at least two distinct locations, grooves/interstitials and the graphene surface. The calculated isosteric heats of adsorption, Qst, in the grooves/interstitials are approximately twice the value on the graphene.
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Wilson, T., Tyburski, A., DePies, M.R. et al. Adsorption of H2 and D2 on Carbon Nanotube Bundles. Journal of Low Temperature Physics 126, 403–408 (2002). https://doi.org/10.1023/A:1013769823838
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DOI: https://doi.org/10.1023/A:1013769823838