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

Németh, Katalin and Pekkerné Jakab, Emma and Borondics, Ferenc and Tóháti, Hajnalka-Mária and Pekker, Áron and Bokor, Mónika Zsuzsanna and Verebélyi, Tamás and Tompa, Kálmán and Pekker, Sándor and Kamarás, Katalin (2015) Breakdown of diameter selectivity in a reductive hydrogenation reaction of single-walled carbon nanotubes. CHEMICAL PHYSICS LETTERS, 618 (2). pp. 214-218. ISSN 0009-2614

Preview

Text 1409.4922.pdf Available under License Creative Commons Attribution. Download (360kB) | Preview

Abstract

Reductive hydrogenation was applied to two types of single-walled carbon nanotubes (SWNTs) with different diameter range. Alkali metal intercala- tion, 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 measure- ments were employed to determine the selectivity and indicate that besides higher yield, lower diameter selectivity occurs above a critical diameter.

Actions (login required)

Edit Item