Breakdown of diameter selectivity in a reductive hydrogenation reaction of single-walled carbon nanotubes

Katalin Nemeth, Emma Jakab, Ferenc Borondics, Hajnalka M. Tóháti, Áron Pekker, Mónika Bokor, Tamás Verebélyi, Kálmán Tompa, Sándor Pekker, Katalin Kamarás

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Abstract

Reductive hydrogenation was applied to two types of single-walled carbon nanotubes with different diameter range. Alkali metal intercalation, followed by reaction with methanol, led to hydrogenated products. Both yield and selectivity of this reaction showed strong dependence on diameter, contrary to expectation based on simple curvature effects. The observed yield, as detected by thermogravimetry-mass spectrometry and 1H NMR, is drastically reduced in small-diameter tubes where the alkali dopant does not reach the inside of the bundles. Wide range optical transmission measurements were employed to determine the selectivity and indicate that besides higher yield, lower diameter selectivity occurs above a critical diameter.

Original languageEnglish
Pages (from-to)214-218
Number of pages5
JournalChemical Physics Letters
Volume618
DOIs
Publication statusPublished - Jan 2 2015

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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