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Metals
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Metal Hydrides
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Metal Hydrides

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (30 April 2017) | Viewed by 9394

Special Issue Editor

Prof. Dr. Jacques Huot

E-Mail Website
Guest Editor
Department of Chemistry, Biochemistry, and Physics, Université du Québec à Trois-Rivières, Trois-Rivières, QC G9A 5H7, Canada
Interests: metal-hydrogen interactions; hydrogen storage; hydrogen diffusion; material characterization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Research on Metal Hydrides has been active for more than 50 years now, but many aspects of these materials still have to be understood. In fact, metal hydrides are a perfect system to investigate complex metal hydrogen interactions. Metal hydrides are also interesting materials for practical applications in the renewable energy field. Hydrogen is considered to be the energetic vector of choice for renewable energies and metal hydrides are one of the key methods to store hydrogen in an efficient and safe way. Recently, other usages, such as thermal storage and use in Li-batteries, have also been envisioned.
This Special Issue is open to all aspects of metal hydrides: Theoretical, experimental and applications. Contributions in the following topics are encouraged.

  • Synthesis and processing of metal hydrides by casting, ball milling, and severe plastic deformation techniques.
  • High capacity hydrogen storage materials
  • Surface phenomena
  • Novel metal hydride materials
  • New means of characterization, including in situ techniques
  • Fundamental understanding of hydrogenation/dehydrogenation process
  • Nanomaterials

Prof. Jacques Huot
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Metal hydrides
  • Hydrogenation/dehydrogenation mechanism
  • Complex hydrides
  • In situ techniques
  • Metal-hydrogen interactions
  • nanomaterials

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Published Papers (2 papers)

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Research

4173 KiB  
Article
Improved Dehydrogenation Properties of 2LiNH2-MgH2 by Doping with Li3AlH6
by Shujun Qiu, Xingyu Ma, Errui Wang, Hailiang Chu, Yongjin Zou, Cuili Xiang, Fen Xu and Lixian Sun
Metals 2017, 7(2), 34; https://doi.org/10.3390/met7020034 - 26 Jan 2017
Cited by 16 | Viewed by 4483
Abstract
Doping with additives in a Li-Mg-N-H system has been regarded as one of the most effective methods of improving hydrogen storage properties. In this paper, we prepared Li3AlH6 and evaluated its effect on the dehydrogenation properties of 2LiNH2-MgH [...] Read more.
Doping with additives in a Li-Mg-N-H system has been regarded as one of the most effective methods of improving hydrogen storage properties. In this paper, we prepared Li3AlH6 and evaluated its effect on the dehydrogenation properties of 2LiNH2-MgH2. Our studies show that doping with Li3AlH6 could effectively lower the dehydrogenation temperatures and increase the hydrogen content of 2LiNH2-MgH2. For example, 2LiNH2-MgH2-0.1Li3AlH6 can desorb 6.43 wt % of hydrogen upon heating to 300 °C, with the onset dehydrogenation temperature at 78 °C. Isothermal dehydrogenation testing indicated that 2LiNH2-MgH2-0.1Li3AlH6 had superior dehydrogenation kinetics at low temperature. Moreover, the release of byproduct NH3 was successfully suppressed. Measurement of the thermal diffusivity suggests that the enhanced dehydrogenation properties may be ascribed to the fact that doping with Li3AlH6 could improve the heat transfer for solid–solid reaction. Full article
(This article belongs to the Special Issue Metal Hydrides)
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2983 KiB  
Article
The Improvement of Dehydriding the Kinetics of NaMgH3 Hydride via Doping with Carbon Nanomaterials
by Zhong-Min Wang, Song Tao, Jia-Jun Li, Jian-Qiu Deng, Huaiying Zhou and Qingrong Yao
Metals 2017, 7(1), 9; https://doi.org/10.3390/met7010009 - 30 Dec 2016
Cited by 15 | Viewed by 4267
Abstract
NaMgH3 perovskite hydride and NaMgH3–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 NaMgH3 hydride, multiwall carbon nanotubes (MWCNTs) and graphene oxide (GO) were [...] Read more.
NaMgH3 perovskite hydride and NaMgH3–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 NaMgH3 hydride, multiwall carbon nanotubes (MWCNTs) and graphene oxide (GO) were used as catalytic additives. It was found that dehydriding temperatures and activation energies (ΔE1 and ΔE2) for two dehydrogenation steps of NaMgH3 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). ΔE1 and ΔE2 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. Full article
(This article belongs to the Special Issue Metal Hydrides)
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