Stability investigation of the γ-MgH 2 phase synthesized by high-energy ball milling

Ntumba Lobo, Akito Takasaki, Kentaro Mineo, Alicja Klimkowicz, Kamil Goc

Research output: Contribution to journalArticle

Abstract

Structural investigations showed that the crystal structure influences the hydrogen storage properties of MgH 2 . The crystal structure and dehydriding temperature of MgH 2 activated by high energy ball milling under an argon atmosphere were studied. The X-ray diffraction characterization showed that a small amount of tetragonal α-MgH 2 phase transforms into crystalline γ-MgH 2 of an orthorhombic structure during milling, and γ-MgH 2 peak intensity increased with increasing ball milling time within a certain limit, but disappeared early in the hydrogenation cycle at a temperature of 300 °C. We studied the phase structure and the stability of the MgH 2 during absorption/desorption cycles as well as thermal stability in a context of sustainable use of MgH 2 .

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusPublished - 2019 Jan 1

Fingerprint

Ball milling
balls
Crystal structure
Hydrogen storage
Phase structure
Hydrogenation
Argon
Desorption
cycles
crystal structure
Thermodynamic stability
Crystalline materials
X ray diffraction
Temperature
hydrogenation
energy
thermal stability
desorption
argon
atmospheres

Keywords

  • Hydrogen absorption/desorption
  • Mechanical milling
  • Thermal stability
  • XRD
  • γ-MgH

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Stability investigation of the γ-MgH 2 phase synthesized by high-energy ball milling . / Lobo, Ntumba; Takasaki, Akito; Mineo, Kentaro; Klimkowicz, Alicja; Goc, Kamil.

In: International Journal of Hydrogen Energy, 01.01.2019.

Research output: Contribution to journalArticle

@article{3163df08f27144698d4814388d09cb47,
title = "Stability investigation of the γ-MgH 2 phase synthesized by high-energy ball milling",
abstract = "Structural investigations showed that the crystal structure influences the hydrogen storage properties of MgH 2 . The crystal structure and dehydriding temperature of MgH 2 activated by high energy ball milling under an argon atmosphere were studied. The X-ray diffraction characterization showed that a small amount of tetragonal α-MgH 2 phase transforms into crystalline γ-MgH 2 of an orthorhombic structure during milling, and γ-MgH 2 peak intensity increased with increasing ball milling time within a certain limit, but disappeared early in the hydrogenation cycle at a temperature of 300 °C. We studied the phase structure and the stability of the MgH 2 during absorption/desorption cycles as well as thermal stability in a context of sustainable use of MgH 2 .",
keywords = "Hydrogen absorption/desorption, Mechanical milling, Thermal stability, XRD, γ-MgH",
author = "Ntumba Lobo and Akito Takasaki and Kentaro Mineo and Alicja Klimkowicz and Kamil Goc",
year = "2019",
month = "1",
day = "1",
doi = "10.1016/j.ijhydene.2019.02.191",
language = "English",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Stability investigation of the γ-MgH 2 phase synthesized by high-energy ball milling

AU - Lobo, Ntumba

AU - Takasaki, Akito

AU - Mineo, Kentaro

AU - Klimkowicz, Alicja

AU - Goc, Kamil

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Structural investigations showed that the crystal structure influences the hydrogen storage properties of MgH 2 . The crystal structure and dehydriding temperature of MgH 2 activated by high energy ball milling under an argon atmosphere were studied. The X-ray diffraction characterization showed that a small amount of tetragonal α-MgH 2 phase transforms into crystalline γ-MgH 2 of an orthorhombic structure during milling, and γ-MgH 2 peak intensity increased with increasing ball milling time within a certain limit, but disappeared early in the hydrogenation cycle at a temperature of 300 °C. We studied the phase structure and the stability of the MgH 2 during absorption/desorption cycles as well as thermal stability in a context of sustainable use of MgH 2 .

AB - Structural investigations showed that the crystal structure influences the hydrogen storage properties of MgH 2 . The crystal structure and dehydriding temperature of MgH 2 activated by high energy ball milling under an argon atmosphere were studied. The X-ray diffraction characterization showed that a small amount of tetragonal α-MgH 2 phase transforms into crystalline γ-MgH 2 of an orthorhombic structure during milling, and γ-MgH 2 peak intensity increased with increasing ball milling time within a certain limit, but disappeared early in the hydrogenation cycle at a temperature of 300 °C. We studied the phase structure and the stability of the MgH 2 during absorption/desorption cycles as well as thermal stability in a context of sustainable use of MgH 2 .

KW - Hydrogen absorption/desorption

KW - Mechanical milling

KW - Thermal stability

KW - XRD

KW - γ-MgH

UR - http://www.scopus.com/inward/record.url?scp=85063099828&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063099828&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2019.02.191

DO - 10.1016/j.ijhydene.2019.02.191

M3 - Article

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

ER -