The local structure of hydrogen storage nanocrystalline graphite by neutron scattering

Keiji Itoh; Yusuke Miyahara; Shin Ichi Orimo; Hironobu Fujii; Takashi Kamiyama; Toshiharu Fukunaga

doi:10.1016/S0925-8388(02)01284-7

The local structure of hydrogen storage nanocrystalline graphite by neutron scattering

Keiji Itoh, Yusuke Miyahara, Shin Ichi Orimo, Hironobu Fujii, Takashi Kamiyama, Toshiharu Fukunaga

Research output: Contribution to journal › Conference article › peer-review

23 Citations (Scopus)

Abstract

The total and inelastic neutron scattering measurements were employed in order to get more information on the local structure of nanocrystalline graphite prepared by mechanical milling under D₂ gas atmosphere. In the RDF(r) for the sample after 50 h of milling, newly grown peak around 0.154 nm was found at the larger r side of the first nearest peak corresponding to the C-C correlation. The distance 0.154 nm of the C-C correlation is attributed to 4-fold bonding. Moreover, the inelastic neutron scattering peak observed in the 160-190 meV region for the samples after 20 h of milling indicates new emergence of sp³ bonding. The results apparently indicate that terminating D atoms at the edges of the nano-lattice plane of graphite create the new sp³ bonding of C atoms during the milling process under D₂ gas atmosphere.

Original language	English
Pages (from-to)	608-611
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	356-357
DOIs	https://doi.org/10.1016/S0925-8388(02)01284-7
Publication status	Published - Aug 11 2003
Externally published	Yes
Event	Proceedings of the Eight International Symposium on Metal Hyd (MH 2002) - Annecy, France Duration: Sept 2 2002 → Sept 6 2002

Keywords

Diffraction
Hydrogen storage materials
Mechanical alloying
Nanostructures
Neutron scattering

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/S0925-8388(02)01284-7

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title = "The local structure of hydrogen storage nanocrystalline graphite by neutron scattering",

abstract = "The total and inelastic neutron scattering measurements were employed in order to get more information on the local structure of nanocrystalline graphite prepared by mechanical milling under D2 gas atmosphere. In the RDF(r) for the sample after 50 h of milling, newly grown peak around 0.154 nm was found at the larger r side of the first nearest peak corresponding to the C-C correlation. The distance 0.154 nm of the C-C correlation is attributed to 4-fold bonding. Moreover, the inelastic neutron scattering peak observed in the 160-190 meV region for the samples after 20 h of milling indicates new emergence of sp3 bonding. The results apparently indicate that terminating D atoms at the edges of the nano-lattice plane of graphite create the new sp3 bonding of C atoms during the milling process under D2 gas atmosphere.",

keywords = "Diffraction, Hydrogen storage materials, Mechanical alloying, Nanostructures, Neutron scattering",

author = "Keiji Itoh and Yusuke Miyahara and Orimo, {Shin Ichi} and Hironobu Fujii and Takashi Kamiyama and Toshiharu Fukunaga",

note = "Funding Information: The authors express their thanks to the Booster Synchrotron Utilization Facility at KEK for providing us with the opportunity of the neutron scattering experiment. The assistance of Mr. T. Omura in the inelastic neutron scattering measurement is also gratefully acknowledged. This work was supported in part by a Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Exploratory Research and Grant-in-Aid for Encouragement of Young Scientists from the Ministry of Education, Science, Sports and Culture.; Proceedings of the Eight International Symposium on Metal Hyd (MH 2002) ; Conference date: 02-09-2002 Through 06-09-2002",

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doi = "10.1016/S0925-8388(02)01284-7",

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T1 - The local structure of hydrogen storage nanocrystalline graphite by neutron scattering

AU - Itoh, Keiji

AU - Miyahara, Yusuke

AU - Orimo, Shin Ichi

AU - Fujii, Hironobu

AU - Kamiyama, Takashi

AU - Fukunaga, Toshiharu

N1 - Funding Information: The authors express their thanks to the Booster Synchrotron Utilization Facility at KEK for providing us with the opportunity of the neutron scattering experiment. The assistance of Mr. T. Omura in the inelastic neutron scattering measurement is also gratefully acknowledged. This work was supported in part by a Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Exploratory Research and Grant-in-Aid for Encouragement of Young Scientists from the Ministry of Education, Science, Sports and Culture.

PY - 2003/8/11

Y1 - 2003/8/11

N2 - The total and inelastic neutron scattering measurements were employed in order to get more information on the local structure of nanocrystalline graphite prepared by mechanical milling under D2 gas atmosphere. In the RDF(r) for the sample after 50 h of milling, newly grown peak around 0.154 nm was found at the larger r side of the first nearest peak corresponding to the C-C correlation. The distance 0.154 nm of the C-C correlation is attributed to 4-fold bonding. Moreover, the inelastic neutron scattering peak observed in the 160-190 meV region for the samples after 20 h of milling indicates new emergence of sp3 bonding. The results apparently indicate that terminating D atoms at the edges of the nano-lattice plane of graphite create the new sp3 bonding of C atoms during the milling process under D2 gas atmosphere.

AB - The total and inelastic neutron scattering measurements were employed in order to get more information on the local structure of nanocrystalline graphite prepared by mechanical milling under D2 gas atmosphere. In the RDF(r) for the sample after 50 h of milling, newly grown peak around 0.154 nm was found at the larger r side of the first nearest peak corresponding to the C-C correlation. The distance 0.154 nm of the C-C correlation is attributed to 4-fold bonding. Moreover, the inelastic neutron scattering peak observed in the 160-190 meV region for the samples after 20 h of milling indicates new emergence of sp3 bonding. The results apparently indicate that terminating D atoms at the edges of the nano-lattice plane of graphite create the new sp3 bonding of C atoms during the milling process under D2 gas atmosphere.

KW - Diffraction

KW - Hydrogen storage materials

KW - Mechanical alloying

KW - Nanostructures

KW - Neutron scattering

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DO - 10.1016/S0925-8388(02)01284-7

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SN - 0925-8388

VL - 356-357

SP - 608

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JO - Journal of the Less-Common Metals

JF - Journal of the Less-Common Metals

T2 - Proceedings of the Eight International Symposium on Metal Hyd (MH 2002)

Y2 - 2 September 2002 through 6 September 2002

ER -

The local structure of hydrogen storage nanocrystalline graphite by neutron scattering

Abstract

Keywords

ASJC Scopus subject areas

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