Noticeable improvement in the desorption temperature from graphite in rehydrogenated MgH2/graphite composite

Z. G. Huang; Z. P. Guo; A. Calka; D. Wexler; J. Wu; P. H.L. Notten; H. K. Liu

doi:10.1016/j.msea.2006.11.074

Noticeable improvement in the desorption temperature from graphite in rehydrogenated MgH₂/graphite composite

Z. G. Huang
, Z. P. Guo
, A. Calka
, D. Wexler
, J. Wu
, P. H.L. Notten
, H. K. Liu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

41 Citations (Scopus)

Abstract

MgH₂/graphite composite was fabricated by mechanically milling elemental ingredients in hydrogen using a special low-energy ball-particle shearing milling. Rehydrogenated MgH₂/graphite composite exhibits a desorption temperature that is lower by about 35 °C compared with that of the as-prepared composite. X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscope (SEM), differential scanning calorimeter (DSC), and Raman and IR spectroscopy were used to investigate the possible origins of the noticeable enhancement in the desorption temperature. It is found that γ-MgH₂, a by-product of ball milling, does not contribute to the enhancement of the hydrogen desorption. Carbon hydrogen bonding is not detected and it seems that the formation of classical C-H bonding is not feasible with this kind of milling mode. It is believed that the structural change in hydrogenated carbon clusters and/or charge-transfer reactions upon hydrogen cycling are likely to be responsible for the enhancement in the hydrogen desorption temperature. © 2006 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	180-185
Journal	Materials Science and Engineering: A
Volume	447
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2006.11.074
Publication status	Published - 25 Feb 2007
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

Financial support from the Australian Research Council through an ARC Discovery project (DP 0449660) and the ARC Centre of Excellence Scheme (CE0561616) are gratefully acknowledged.

UN SDGs

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

SDG 7 Affordable and Clean Energy

Research Keywords

Graphite
Hydrogen storage
Magnesium
Magnesium hydride

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Cite this

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title = "Noticeable improvement in the desorption temperature from graphite in rehydrogenated MgH2/graphite composite",

abstract = "MgH2/graphite composite was fabricated by mechanically milling elemental ingredients in hydrogen using a special low-energy ball-particle shearing milling. Rehydrogenated MgH2/graphite composite exhibits a desorption temperature that is lower by about 35 °C compared with that of the as-prepared composite. X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscope (SEM), differential scanning calorimeter (DSC), and Raman and IR spectroscopy were used to investigate the possible origins of the noticeable enhancement in the desorption temperature. It is found that γ-MgH2, a by-product of ball milling, does not contribute to the enhancement of the hydrogen desorption. Carbon hydrogen bonding is not detected and it seems that the formation of classical C-H bonding is not feasible with this kind of milling mode. It is believed that the structural change in hydrogenated carbon clusters and/or charge-transfer reactions upon hydrogen cycling are likely to be responsible for the enhancement in the hydrogen desorption temperature. {\textcopyright} 2006 Elsevier B.V. All rights reserved.",

keywords = "Graphite, Hydrogen storage, Magnesium, Magnesium hydride",

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note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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doi = "10.1016/j.msea.2006.11.074",

language = "English",

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T1 - Noticeable improvement in the desorption temperature from graphite in rehydrogenated MgH2/graphite composite

AU - Huang, Z. G.

AU - Guo, Z. P.

AU - Calka, A.

AU - Wexler, D.

AU - Wu, J.

AU - Notten, P. H.L.

AU - Liu, H. K.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2007/2/25

Y1 - 2007/2/25

N2 - MgH2/graphite composite was fabricated by mechanically milling elemental ingredients in hydrogen using a special low-energy ball-particle shearing milling. Rehydrogenated MgH2/graphite composite exhibits a desorption temperature that is lower by about 35 °C compared with that of the as-prepared composite. X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscope (SEM), differential scanning calorimeter (DSC), and Raman and IR spectroscopy were used to investigate the possible origins of the noticeable enhancement in the desorption temperature. It is found that γ-MgH2, a by-product of ball milling, does not contribute to the enhancement of the hydrogen desorption. Carbon hydrogen bonding is not detected and it seems that the formation of classical C-H bonding is not feasible with this kind of milling mode. It is believed that the structural change in hydrogenated carbon clusters and/or charge-transfer reactions upon hydrogen cycling are likely to be responsible for the enhancement in the hydrogen desorption temperature. © 2006 Elsevier B.V. All rights reserved.

AB - MgH2/graphite composite was fabricated by mechanically milling elemental ingredients in hydrogen using a special low-energy ball-particle shearing milling. Rehydrogenated MgH2/graphite composite exhibits a desorption temperature that is lower by about 35 °C compared with that of the as-prepared composite. X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscope (SEM), differential scanning calorimeter (DSC), and Raman and IR spectroscopy were used to investigate the possible origins of the noticeable enhancement in the desorption temperature. It is found that γ-MgH2, a by-product of ball milling, does not contribute to the enhancement of the hydrogen desorption. Carbon hydrogen bonding is not detected and it seems that the formation of classical C-H bonding is not feasible with this kind of milling mode. It is believed that the structural change in hydrogenated carbon clusters and/or charge-transfer reactions upon hydrogen cycling are likely to be responsible for the enhancement in the hydrogen desorption temperature. © 2006 Elsevier B.V. All rights reserved.

KW - Graphite

KW - Hydrogen storage

KW - Magnesium

KW - Magnesium hydride

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DO - 10.1016/j.msea.2006.11.074

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JO - Materials Science and Engineering: A

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