The crystal structures in hydrogen absorption reactions of REMgNi4-based alloys (RE: Rare-earth metals)

Toyoto Sato; Shin Ichi Orimo

doi:10.3390/en14238163

The crystal structures in hydrogen absorption reactions of REMgNi₄-based alloys (RE: Rare-earth metals)

Toyoto Sato, Shin Ichi Orimo

Department of Engineering Science and Mechanics

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

4 Citations (Scopus)

Abstract

REMgNi₄-based alloys, RE_(2−x) Mg_x Ni₄ (RE: rare-earth metals; 0 < x < 2), with a AuBe₅-type crystal structure, exhibit reversible hydrogen absorption and desorption reactions, which are known as hydrogen storage properties. These reactions involve formation of three hydride phases. The hydride formation pressures and hydrogen storage capacities are related to the radii of the RE_(2−x) Mg_x Ni₄, which in turn are dependent on the radii and compositional ratios of the RE and Mg atoms. The crystal structures formed during hydrogen absorption reactions are the key to understanding the hydrogen storage properties of RE_(2−x) Mg_x Ni₄. Therefore, in this review, we provide an overview of the crystal structures in the hydrogen absorption reactions focusing on RE_(2−x) Mg_x Ni₄.

Original language	English
Article number	8163
Journal	Energies
Volume	14
Issue number	23
DOIs	https://doi.org/10.3390/en14238163
Publication status	Published - 2021 Dec 1

Keywords

Crystal structures
Hydrides
Hydrogen storage materials

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Energy Engineering and Power Technology
Energy (miscellaneous)
Control and Optimization
Electrical and Electronic Engineering

Access to Document

10.3390/en14238163

Cite this

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title = "The crystal structures in hydrogen absorption reactions of REMgNi4-based alloys (RE: Rare-earth metals)",

abstract = "REMgNi4-based alloys, RE(2−x) Mgx Ni4 (RE: rare-earth metals; 0 < x < 2), with a AuBe5-type crystal structure, exhibit reversible hydrogen absorption and desorption reactions, which are known as hydrogen storage properties. These reactions involve formation of three hydride phases. The hydride formation pressures and hydrogen storage capacities are related to the radii of the RE(2−x) Mgx Ni4, which in turn are dependent on the radii and compositional ratios of the RE and Mg atoms. The crystal structures formed during hydrogen absorption reactions are the key to understanding the hydrogen storage properties of RE(2−x) Mgx Ni4. Therefore, in this review, we provide an overview of the crystal structures in the hydrogen absorption reactions focusing on RE(2−x) Mgx Ni4.",

keywords = "Crystal structures, Hydrides, Hydrogen storage materials",

author = "Toyoto Sato and Orimo, {Shin Ichi}",

note = "Funding Information: Funding: This research was funded by JST SICORP, grant number JPMJSC 1802 and MEXT/JSPS KAKENHI “Hydrogenomics”, grant number JP18H05513. Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

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AU - Sato, Toyoto

AU - Orimo, Shin Ichi

N1 - Funding Information: Funding: This research was funded by JST SICORP, grant number JPMJSC 1802 and MEXT/JSPS KAKENHI “Hydrogenomics”, grant number JP18H05513. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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Y1 - 2021/12/1

N2 - REMgNi4-based alloys, RE(2−x) Mgx Ni4 (RE: rare-earth metals; 0 < x < 2), with a AuBe5-type crystal structure, exhibit reversible hydrogen absorption and desorption reactions, which are known as hydrogen storage properties. These reactions involve formation of three hydride phases. The hydride formation pressures and hydrogen storage capacities are related to the radii of the RE(2−x) Mgx Ni4, which in turn are dependent on the radii and compositional ratios of the RE and Mg atoms. The crystal structures formed during hydrogen absorption reactions are the key to understanding the hydrogen storage properties of RE(2−x) Mgx Ni4. Therefore, in this review, we provide an overview of the crystal structures in the hydrogen absorption reactions focusing on RE(2−x) Mgx Ni4.

AB - REMgNi4-based alloys, RE(2−x) Mgx Ni4 (RE: rare-earth metals; 0 < x < 2), with a AuBe5-type crystal structure, exhibit reversible hydrogen absorption and desorption reactions, which are known as hydrogen storage properties. These reactions involve formation of three hydride phases. The hydride formation pressures and hydrogen storage capacities are related to the radii of the RE(2−x) Mgx Ni4, which in turn are dependent on the radii and compositional ratios of the RE and Mg atoms. The crystal structures formed during hydrogen absorption reactions are the key to understanding the hydrogen storage properties of RE(2−x) Mgx Ni4. Therefore, in this review, we provide an overview of the crystal structures in the hydrogen absorption reactions focusing on RE(2−x) Mgx Ni4.

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