Physisorption of molecular oxygen on single-wall carbon nanotube bundles and graphite

By Hendrik Ulbricht, G. Moos, T. Hertel. 2002

156 citations recorded by the source corpus.

We present a study on the kinetics of oxygen adsorption and desorption from single-wall carbon nanotube (SWNT) and highly oriented pyrolytic graphite (HOPG) samples. Thermal-desorption spectra for SWNT samples show a broad desorption feature peaked at 62 K, which is shifted to a significantly higher temperature than the low-coverage desorption feature on HOPG. The low-coverage ${\mathrm{O}}_{2}$ binding energy on SWNT bundles (18.5 kJ/mol) is 55% higher than that for adsorption on HOPG (12.0 kJ/mol). In combination with molecular mechanics calculations we show that the observed binding energies for both systems can be attributed to van der Waals interactions, i.e., physisorption. The experiments provide no evidence for a more strongly bound chemisorbed species or for dissociative oxygen adsorption.

Subfields: Biomedical Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/64b5812b5ef83ff48d25ee6ce1747083c191f9a2

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In Biomedical Engineering

1. H. Cuppen
2. E. Herbst

In Materials Chemistry

1. H. Cuppen
2. E. Herbst
3. R. Garrod

Citations in the corpus

• Simulation of the Formation and Morphology of Ice Mantles on Interstellar Grains (2007, methodology): “Our value of 0.5 lies closer to this last study and corresponds to the value found by Ulbricht et al. (2002) for oxygen adsorption on carbon nanotubes.”