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Improvement of Hydrogen Adsorption on Carbon Nanostructures

Published online by Cambridge University Press:  01 February 2011

Lyubov Lafi ,
Richard Chahine ,
Pierre Bénard  and
Éric Poirier
Lyubov Lafi
Affiliation:
[email protected], UQTR, IRH, 3351 boul.des Forges, Trois-Rivieres, G9A 5H7, Canada, 819 376-5011 4460, 819 376-5164
Richard Chahine
Affiliation:
[email protected], UQTR, IRH, 3351 boul. des Forges, P.O. Box 500, Trois-Rivieres, G9A 5H7, Canada
Pierre Bénard
Affiliation:
[email protected], UQTR, IRH, 3351 boul. des Forges, P.O. Box 500, Trois-Rivieres, G9A 5H7, Canada
Éric Poirier
Affiliation:
[email protected], UQTR, IRH, 3351 boul. des Forges, P.O. Box 500, Trois-Rivieres, G9A 5H7, Canada
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Abstract

We present results of a study of the effect of various surface treatments on the adsorption properties of hydrogen on single-walled carbon nanotubes (SWNTs) and activated carbon. The alteration of the surface area by thermal and chemical treatments of SWNTs was studied by Raman spectroscopy, x-ray photoelectron spectroscopy (XPS) and nitrogen adsorption. The Horwath-Kawazoe (HK) method was applied to describe the increase of the surface area and of the pore volume of the SWNT samples. The surface treatments lead to substantially improvement of hydrogen adsorption at 77 K and 1 atm. The averaged heat of adsorption (enthalpy), estimated from a Dubinin-Astakhov (DA) analysis, was found to be about 3.6 and 4.2 kJ/mol for heat-treated and as-received SWNTs, respectively.

Keywords

Hadsorptionnanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1018: Symposium EE – Applications of Nanotubes and Nanowires , 2007 , 1018-EE14-21
Copyright
Copyright © Materials Research Society 2007

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