Enhanced hydrogen absorption kinetics by introducing fine eutectic and long-period stacking ordered structure in ternary eutectic Mg–Ni–Y alloy

Wenjie Song; Huiping Dong; Guang Zhang; Jie Liu; Guang Yang; Yanhui Liu; Yuzhi Li; Jinshan Li; Jianghua Shen; Youxing Chen; Qiuming Wei

doi:10.1016/j.jallcom.2019.153187

Enhanced hydrogen absorption kinetics by introducing fine eutectic and long-period stacking ordered structure in ternary eutectic Mg–Ni–Y alloy

Wenjie Song, Huiping Dong, Guang Zhang, Jie Liu, Guang Yang, Yanhui Liu, Yuzhi Li, Jinshan Li, Jianghua Shen, Youxing Chen, Qiuming Wei

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

36 Scopus citations

Abstract

We employ a ternary eutectic Mg_76.87Ni_12.78Y_10.35 alloy to achieve a fine eutectic structure with long-period stacking ordered (LPSO) structure, and investigate the corresponding hydrogen storage behavior. The as-cast Mg_76.87Ni_12.78Y_10.35 alloy is composed of Mg₁₅NiY, Mg₂Ni, MgNi₄Y and Mg phases. A high density of stacking faults and 14H-type LPSO structures form in the Mg₁₅NiY phase. This fine ternary eutectic structure has shown significant improvement in promotion of the activation and following hydrogen absorption kinetics compared with as-cast non-eutectic structure. Pressure-Composition-Temperature (PCT) curves demonstrate two major pressure platforms due to the presence of Mg₁₅NiY and Mg₂Ni in our Mg–Ni–Y alloys. Nanosized Mg₂NiH_x, MgH₂ and YH_x are in situ generated from the decomposition of LPSO structure during hydrogenation. The fine ternary eutectic structure and dispersed nanocatalysts from decomposition of LPSO structure synergistically facilitate the activation and hydrogen absorption kinetics of ternary eutectic Mg–Ni–Y alloy.

Original language	English
Article number	153187
Journal	Journal of Alloys and Compounds
Volume	820
DOIs	https://doi.org/10.1016/j.jallcom.2019.153187
State	Published - 15 Apr 2020

Keywords

Eutectic
Hydrogen storage
Long-period stacking ordered structure
Mg-based alloys
Mg–Ni–Y

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10.1016/j.jallcom.2019.153187

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title = "Enhanced hydrogen absorption kinetics by introducing fine eutectic and long-period stacking ordered structure in ternary eutectic Mg–Ni–Y alloy",

abstract = "We employ a ternary eutectic Mg76.87Ni12.78Y10.35 alloy to achieve a fine eutectic structure with long-period stacking ordered (LPSO) structure, and investigate the corresponding hydrogen storage behavior. The as-cast Mg76.87Ni12.78Y10.35 alloy is composed of Mg15NiY, Mg2Ni, MgNi4Y and Mg phases. A high density of stacking faults and 14H-type LPSO structures form in the Mg15NiY phase. This fine ternary eutectic structure has shown significant improvement in promotion of the activation and following hydrogen absorption kinetics compared with as-cast non-eutectic structure. Pressure-Composition-Temperature (PCT) curves demonstrate two major pressure platforms due to the presence of Mg15NiY and Mg2Ni in our Mg–Ni–Y alloys. Nanosized Mg2NiHx, MgH2 and YHx are in situ generated from the decomposition of LPSO structure during hydrogenation. The fine ternary eutectic structure and dispersed nanocatalysts from decomposition of LPSO structure synergistically facilitate the activation and hydrogen absorption kinetics of ternary eutectic Mg–Ni–Y alloy.",

keywords = "Eutectic, Hydrogen storage, Long-period stacking ordered structure, Mg-based alloys, Mg–Ni–Y",

author = "Wenjie Song and Huiping Dong and Guang Zhang and Jie Liu and Guang Yang and Yanhui Liu and Yuzhi Li and Jinshan Li and Jianghua Shen and Youxing Chen and Qiuming Wei",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2020",

month = apr,

day = "15",

doi = "10.1016/j.jallcom.2019.153187",

language = "英语",

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T1 - Enhanced hydrogen absorption kinetics by introducing fine eutectic and long-period stacking ordered structure in ternary eutectic Mg–Ni–Y alloy

AU - Song, Wenjie

AU - Dong, Huiping

AU - Zhang, Guang

AU - Liu, Jie

AU - Yang, Guang

AU - Liu, Yanhui

AU - Li, Yuzhi

AU - Li, Jinshan

AU - Shen, Jianghua

AU - Chen, Youxing

AU - Wei, Qiuming

PY - 2020/4/15

Y1 - 2020/4/15

N2 - We employ a ternary eutectic Mg76.87Ni12.78Y10.35 alloy to achieve a fine eutectic structure with long-period stacking ordered (LPSO) structure, and investigate the corresponding hydrogen storage behavior. The as-cast Mg76.87Ni12.78Y10.35 alloy is composed of Mg15NiY, Mg2Ni, MgNi4Y and Mg phases. A high density of stacking faults and 14H-type LPSO structures form in the Mg15NiY phase. This fine ternary eutectic structure has shown significant improvement in promotion of the activation and following hydrogen absorption kinetics compared with as-cast non-eutectic structure. Pressure-Composition-Temperature (PCT) curves demonstrate two major pressure platforms due to the presence of Mg15NiY and Mg2Ni in our Mg–Ni–Y alloys. Nanosized Mg2NiHx, MgH2 and YHx are in situ generated from the decomposition of LPSO structure during hydrogenation. The fine ternary eutectic structure and dispersed nanocatalysts from decomposition of LPSO structure synergistically facilitate the activation and hydrogen absorption kinetics of ternary eutectic Mg–Ni–Y alloy.

AB - We employ a ternary eutectic Mg76.87Ni12.78Y10.35 alloy to achieve a fine eutectic structure with long-period stacking ordered (LPSO) structure, and investigate the corresponding hydrogen storage behavior. The as-cast Mg76.87Ni12.78Y10.35 alloy is composed of Mg15NiY, Mg2Ni, MgNi4Y and Mg phases. A high density of stacking faults and 14H-type LPSO structures form in the Mg15NiY phase. This fine ternary eutectic structure has shown significant improvement in promotion of the activation and following hydrogen absorption kinetics compared with as-cast non-eutectic structure. Pressure-Composition-Temperature (PCT) curves demonstrate two major pressure platforms due to the presence of Mg15NiY and Mg2Ni in our Mg–Ni–Y alloys. Nanosized Mg2NiHx, MgH2 and YHx are in situ generated from the decomposition of LPSO structure during hydrogenation. The fine ternary eutectic structure and dispersed nanocatalysts from decomposition of LPSO structure synergistically facilitate the activation and hydrogen absorption kinetics of ternary eutectic Mg–Ni–Y alloy.

KW - Eutectic

KW - Hydrogen storage

KW - Long-period stacking ordered structure

KW - Mg-based alloys

KW - Mg–Ni–Y

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U2 - 10.1016/j.jallcom.2019.153187

DO - 10.1016/j.jallcom.2019.153187

M3 - 文章

AN - SCOPUS:85076999549

SN - 0925-8388

VL - 820

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 153187

ER -

Enhanced hydrogen absorption kinetics by introducing fine eutectic and long-period stacking ordered structure in ternary eutectic Mg–Ni–Y alloy

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