Neutron spectroscopy study of single-walled carbon nanotubes hydrogenated under high pressure

A. I. Kolesnikov; I. O. Bashkin; V. E. Antonov; D. Colognesi; J. Mayers; A. P. Moravsky

doi:10.1016/j.jallcom.2006.11.207

Neutron spectroscopy study of single-walled carbon nanotubes hydrogenated under high pressure

A. I. Kolesnikov, I. O. Bashkin, V. E. Antonov, D. Colognesi, J. Mayers, A. P. Moravsky

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Single-walled carbon nanotubes (SWNT) were loaded with 5.2 wt% hydrogen at a hydrogen pressure of 3 GPa and T = 620 K, quenched to 80 K and studied at ambient pressure and 15 K by inelastic neutron scattering (INS) in the range of energy transfers 3-400 meV. An analysis of the measured INS spectra showed that the quenched SWNT & H sample contained hydrogen in two different forms, as H atoms covalently bound to the carbon atoms (∼4.7 wt%) and as H₂ molecules (∼0.5 wt%) exhibiting nearly free rotational behavior. Annealing the sample in vacuum at 332 K removed about 65% of the H₂ molecules and annealing at 623 K removed all of them. This demonstrates that H₂ molecules were kept in this sample more tightly than in earlier studied SWNT & H samples that were hydrogenated at lower pressures and temperatures and lost all molecular hydrogen on heating in vacuum to room temperature.

Original language	English
Pages (from-to)	389-392
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	446-447
DOIs	https://doi.org/10.1016/j.jallcom.2006.11.207
State	Published - Oct 31 2007
Externally published	Yes

Funding

The work performed at the IPNS was supported by the Office of Basic Energy Sciences, Division of Materials Sciences, US Department of Energy, under Contract No. W-31-109-ENG-38; and the work done at ISSP RAS was supported by the Russian Foundation for Fundamental Research, grant No. 06-02-17426, and by the Russian federal program “Research and development in the priority directions of science and engineering”, contract No. 661-05 “Development of hydrogenation technique for fullerenes and carbon nanotubes”. We would like to thank the ISIS at Rutherford Appleton Laboratory for the use of neutron beam time.

Funders	Funder number
Division of Materials Sciences
Russian Foundation for Fundamental Research	06-02-17426
U.S. Department of Energy	W-31-109-ENG-38
Basic Energy Sciences
Science and Engineering Faculty, Queensland University of Technology	661-05

Keywords

High-pressure
Inelastic neutron scattering
Nanostructured materials

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jallcom.2006.11.207

Cite this

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title = "Neutron spectroscopy study of single-walled carbon nanotubes hydrogenated under high pressure",

abstract = "Single-walled carbon nanotubes (SWNT) were loaded with 5.2 wt% hydrogen at a hydrogen pressure of 3 GPa and T = 620 K, quenched to 80 K and studied at ambient pressure and 15 K by inelastic neutron scattering (INS) in the range of energy transfers 3-400 meV. An analysis of the measured INS spectra showed that the quenched SWNT & H sample contained hydrogen in two different forms, as H atoms covalently bound to the carbon atoms (∼4.7 wt%) and as H2 molecules (∼0.5 wt%) exhibiting nearly free rotational behavior. Annealing the sample in vacuum at 332 K removed about 65% of the H2 molecules and annealing at 623 K removed all of them. This demonstrates that H2 molecules were kept in this sample more tightly than in earlier studied SWNT & H samples that were hydrogenated at lower pressures and temperatures and lost all molecular hydrogen on heating in vacuum to room temperature.",

keywords = "High-pressure, Inelastic neutron scattering, Nanostructured materials",

author = "Kolesnikov, {A. I.} and Bashkin, {I. O.} and Antonov, {V. E.} and D. Colognesi and J. Mayers and Moravsky, {A. P.}",

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T1 - Neutron spectroscopy study of single-walled carbon nanotubes hydrogenated under high pressure

AU - Kolesnikov, A. I.

AU - Bashkin, I. O.

AU - Antonov, V. E.

AU - Colognesi, D.

AU - Mayers, J.

AU - Moravsky, A. P.

PY - 2007/10/31

Y1 - 2007/10/31

N2 - Single-walled carbon nanotubes (SWNT) were loaded with 5.2 wt% hydrogen at a hydrogen pressure of 3 GPa and T = 620 K, quenched to 80 K and studied at ambient pressure and 15 K by inelastic neutron scattering (INS) in the range of energy transfers 3-400 meV. An analysis of the measured INS spectra showed that the quenched SWNT & H sample contained hydrogen in two different forms, as H atoms covalently bound to the carbon atoms (∼4.7 wt%) and as H2 molecules (∼0.5 wt%) exhibiting nearly free rotational behavior. Annealing the sample in vacuum at 332 K removed about 65% of the H2 molecules and annealing at 623 K removed all of them. This demonstrates that H2 molecules were kept in this sample more tightly than in earlier studied SWNT & H samples that were hydrogenated at lower pressures and temperatures and lost all molecular hydrogen on heating in vacuum to room temperature.

AB - Single-walled carbon nanotubes (SWNT) were loaded with 5.2 wt% hydrogen at a hydrogen pressure of 3 GPa and T = 620 K, quenched to 80 K and studied at ambient pressure and 15 K by inelastic neutron scattering (INS) in the range of energy transfers 3-400 meV. An analysis of the measured INS spectra showed that the quenched SWNT & H sample contained hydrogen in two different forms, as H atoms covalently bound to the carbon atoms (∼4.7 wt%) and as H2 molecules (∼0.5 wt%) exhibiting nearly free rotational behavior. Annealing the sample in vacuum at 332 K removed about 65% of the H2 molecules and annealing at 623 K removed all of them. This demonstrates that H2 molecules were kept in this sample more tightly than in earlier studied SWNT & H samples that were hydrogenated at lower pressures and temperatures and lost all molecular hydrogen on heating in vacuum to room temperature.

KW - High-pressure

KW - Inelastic neutron scattering

KW - Nanostructured materials

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Neutron spectroscopy study of single-walled carbon nanotubes hydrogenated under high pressure

Abstract

Funding

Keywords

UN SDGs

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