Title

Hydrogen Storage in Carbon Nanotubes: Residual Metal Content and Pretreatment Temperature

Abstract

Hydrogen storage in MWNT was enhanced via the catalytic activity of NiMgO. The magnitude of the hydrogen to metal ratio for the MWNT/NiMgO system, combined with temperature programmed adsorption and desorption studies, showed hydrogen spillover from the catalyst to the carbon surface. Metal doping combined with temperature activation studies showed that both nickel and magnesium are active in the catalytic process. The yield, quality, and carbon-metal contact were shown to affect hydrogen uptake. Higher pretreatment temperatures enhanced uptake, for both low- and high-pressure measurements, due to increased carbon-metal contact and activation of the catalyst. At 69 bar (or 1,000 psia), the hydrogen adsorption and desorption of the MWNT/NiMgO system were 3.7% and 3.6%, respectively.

Department(s)

Chemical and Biochemical Engineering

Sponsor(s)

National Science Foundation (U.S.)

Comments

This work was funded by NSF CTS-0138190.

Keywords and Phrases

Adsorption; Catalyst activity; Desorption; Hydrogen; Pressure measurement; Metal ratio; Carbon nanotubes; Carbon; Hydrogen; Magnesium; Magnesium oxide; Metal; Nickel; Oxygen; Article; Catalysis; Catalyst; Chemical analysis; Chemical composition; Chemical interaction; Desorption; Dissociation; Measurement; Nanotechnology; Pressure; Proton transport; Quality control; Surface property; Synthesis; Temperature dependence

International Standard Serial Number (ISSN)

0001-1541

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2003 John Wiley & Sons, All rights reserved.

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