Hydrogen storage: Lattice dynamics of orthorhombic NaMgH3

Bouhadda, Y.; Fenineche, N.; Boudouma, Y.

doi:10.1016/j.physb.2010.12.048

Cited by 25 publications

(14 citation statements)

References 23 publications

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“…Structure Characterization of As-Prepared NaMgH 3 Hydride and NH-CM Composites Figure 1 shows the XRD patterns of as-prepared NaMgH 3 hydride and NH-CM composites (NH-5M, NH-5G, and NH-2.5M-2.5G). The red long string is the standard line of NaMgH 3 phase.…”

Section: Resultsmentioning

confidence: 99%

“…Perovskite-type hydride, NaMgH 3 , as a potential candidate for on-board applications, has received considerable attention for its high gravimetric and volumetric hydrogen densities (6 wt. % and 88 kg/m 3 , respectively), as well as its reversible hydriding and dehydriding reactions [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…% and 88 kg/m 3 , respectively), as well as its reversible hydriding and dehydriding reactions [1][2][3][4][5][6][7]. NaMgH 3 is characterized by an orthorhombic perovskite structure comprising [MgH 6 ] octahedra and [NaH 12 ] cubo-octahedra, which is analogous to GdFeO 3 -type perovskite (space group Pnma).…”

Section: Introductionmentioning

confidence: 99%

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The Improvement of Dehydriding the Kinetics of NaMgH3 Hydride via Doping with Carbon Nanomaterials

Wang

Song

et al. 2016

Metals

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NaMgH 3 perovskite hydride and NaMgH 3 -carbon nanomaterials (NH-CM) composites were prepared via the reactive ball-milling method. To investigate the catalytic effect of CM on the dehydriding kinetic properties of NaMgH 3 hydride, multiwall carbon nanotubes (MWCNTs) and graphene oxide (GO) were used as catalytic additives. It was found that dehydriding temperatures and activation energies (∆E 1 and ∆E 2 ) for two dehydrogenation steps of NaMgH 3 hydride can be greatly reduced with a 5 wt. % CM addition. The NH-2.5M-2.5G composite presents better dehydriding kinetics, a lower dehydriding temperature, and a higher hydrogen-desorbed amount (3.64 wt. %, 638 K). ∆E 1 and ∆E 2 can be reduced by about 67 kJ/mol and 30 kJ/mol, respectively. The results suggest that the combination of MWCNTs and GO is a better catalyst as compared to MWCNTs or GO alone.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Improvement of Dehydriding the Kinetics of NaMgH3 Hydride via Doping with Carbon Nanomaterials

Wang

Song

et al. 2016

Metals

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show abstract

“…Based in the factor group theory, the irreducible representations at point is: 4T 1u + T 2u each of them triply degenerated where T 1u and T 2u are IR-active and silent respectively. For IR-active modes there are LO-TO splitting due to the coupling of the atomic displacement with the long-range electric field by means of Born effective charges tensors [13].…”

Section: Lattice Dynamic and Born Effective Chargementioning

confidence: 99%

“…In order to contribute in this field, the full phonon-dispersion curves will be necessary for a microscopic understanding of the lattice dynamics. Indeed, the phonon spectrum knowledge has a significant role in determining various material properties such as the phase transition, thermodynamic stability, transport and thermal properties [13].…”

Section: Introductionmentioning

confidence: 99%