Controlling nanocrystallization and hydrogen storage property of Mg-based amorphous alloy via a gas-solid reaction

Huai Jun Lin; Chi Zhang; Hui Wang; Liuzhang Ouyang; Yunfeng Zhu; Liquan Li; Weihua Wang; Min Zhu

doi:10.1016/j.jallcom.2016.05.286

Controlling nanocrystallization and hydrogen storage property of Mg-based amorphous alloy via a gas-solid reaction

Huai Jun Lin, Chi Zhang, Hui Wang, Liuzhang Ouyang, Yunfeng Zhu, Liquan Li, Weihua Wang, Min Zhu

College of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

59 Scopus citations

Abstract

A valid strategy via a gas-solid reaction for preparing Mg-based nanocomposite with controllable crystallite size and suitable for massive production is proposed. The nanocomposites consisting of well-dispersed catalytic nano-Mg₂NiH₄/CeH_2.73 embedded in the nano-MgH₂ matrix with crystallite sizes of all phases below 10 nm are fabricated via controlling activation temperature and hydrogen gas (H₂) pressure upon the amorphous Mg₈₀Ce₁₀Ni₁₀ alloy. Increasing H₂ pressure and reducing temperature are beneficial for obtaining fine hydrides, leading to lowered hydrogen desorption temperature. MgH₂ and CeH_2.73 gradually grow up with the increase of de-/re-hydrogenation cycles, while Mg₂NiH₄ remains stable during cycling. After 15 de-/re-hydrogenation cycles, the finest nanocomposite shows remarkably reduced activation energy of dehydrogenation of 87 ± 7 kJ/mol (∼160 kJ/mol for commercial MgH₂).

Original language	English
Pages (from-to)	272-277
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	685
DOIs	https://doi.org/10.1016/j.jallcom.2016.05.286
State	Published - 15 Nov 2016

Keywords

Crystallite size
Gas-solid reaction
Hydrogen storage
Mg-based alloy
Nanocomposite

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10.1016/j.jallcom.2016.05.286

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@article{131756a847444943bb9933254c50c1f2,

title = "Controlling nanocrystallization and hydrogen storage property of Mg-based amorphous alloy via a gas-solid reaction",

abstract = "A valid strategy via a gas-solid reaction for preparing Mg-based nanocomposite with controllable crystallite size and suitable for massive production is proposed. The nanocomposites consisting of well-dispersed catalytic nano-Mg2NiH4/CeH2.73 embedded in the nano-MgH2 matrix with crystallite sizes of all phases below 10 nm are fabricated via controlling activation temperature and hydrogen gas (H2) pressure upon the amorphous Mg80Ce10Ni10 alloy. Increasing H2 pressure and reducing temperature are beneficial for obtaining fine hydrides, leading to lowered hydrogen desorption temperature. MgH2 and CeH2.73 gradually grow up with the increase of de-/re-hydrogenation cycles, while Mg2NiH4 remains stable during cycling. After 15 de-/re-hydrogenation cycles, the finest nanocomposite shows remarkably reduced activation energy of dehydrogenation of 87 ± 7 kJ/mol (∼160 kJ/mol for commercial MgH2).",

keywords = "Crystallite size, Gas-solid reaction, Hydrogen storage, Mg-based alloy, Nanocomposite",

author = "Lin, {Huai Jun} and Chi Zhang and Hui Wang and Liuzhang Ouyang and Yunfeng Zhu and Liquan Li and Weihua Wang and Min Zhu",

year = "2016",

month = nov,

day = "15",

doi = "10.1016/j.jallcom.2016.05.286",

language = "英语",

volume = "685",

pages = "272--277",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Controlling nanocrystallization and hydrogen storage property of Mg-based amorphous alloy via a gas-solid reaction

AU - Lin, Huai Jun

AU - Zhang, Chi

AU - Wang, Hui

AU - Ouyang, Liuzhang

AU - Zhu, Yunfeng

AU - Li, Liquan

AU - Wang, Weihua

AU - Zhu, Min

PY - 2016/11/15

Y1 - 2016/11/15

N2 - A valid strategy via a gas-solid reaction for preparing Mg-based nanocomposite with controllable crystallite size and suitable for massive production is proposed. The nanocomposites consisting of well-dispersed catalytic nano-Mg2NiH4/CeH2.73 embedded in the nano-MgH2 matrix with crystallite sizes of all phases below 10 nm are fabricated via controlling activation temperature and hydrogen gas (H2) pressure upon the amorphous Mg80Ce10Ni10 alloy. Increasing H2 pressure and reducing temperature are beneficial for obtaining fine hydrides, leading to lowered hydrogen desorption temperature. MgH2 and CeH2.73 gradually grow up with the increase of de-/re-hydrogenation cycles, while Mg2NiH4 remains stable during cycling. After 15 de-/re-hydrogenation cycles, the finest nanocomposite shows remarkably reduced activation energy of dehydrogenation of 87 ± 7 kJ/mol (∼160 kJ/mol for commercial MgH2).

AB - A valid strategy via a gas-solid reaction for preparing Mg-based nanocomposite with controllable crystallite size and suitable for massive production is proposed. The nanocomposites consisting of well-dispersed catalytic nano-Mg2NiH4/CeH2.73 embedded in the nano-MgH2 matrix with crystallite sizes of all phases below 10 nm are fabricated via controlling activation temperature and hydrogen gas (H2) pressure upon the amorphous Mg80Ce10Ni10 alloy. Increasing H2 pressure and reducing temperature are beneficial for obtaining fine hydrides, leading to lowered hydrogen desorption temperature. MgH2 and CeH2.73 gradually grow up with the increase of de-/re-hydrogenation cycles, while Mg2NiH4 remains stable during cycling. After 15 de-/re-hydrogenation cycles, the finest nanocomposite shows remarkably reduced activation energy of dehydrogenation of 87 ± 7 kJ/mol (∼160 kJ/mol for commercial MgH2).

KW - Crystallite size

KW - Gas-solid reaction

KW - Hydrogen storage

KW - Mg-based alloy

KW - Nanocomposite

UR - http://www.scopus.com/inward/record.url?scp=84971612011&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2016.05.286

DO - 10.1016/j.jallcom.2016.05.286

M3 - 文章

AN - SCOPUS:84971612011

SN - 0925-8388

VL - 685

SP - 272

EP - 277

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Controlling nanocrystallization and hydrogen storage property of Mg-based amorphous alloy via a gas-solid reaction

Abstract

Keywords

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