Improved reversible dehydrogenation of 2LiBH4+MgH2 system by introducing Ni nanoparticles

Jianfeng Mao; Zaiping Guo; Xuebin Yu; Huakun Liu

doi:10.1557/jmr.2011.72

Improved reversible dehydrogenation of 2LiBH₄+MgH₂ system by introducing Ni nanoparticles

Jianfeng Mao
, Zaiping Guo
, Xuebin Yu
, Huakun Liu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

22 Citations (Scopus)

Abstract

We report that the hydrogen de/resorption of the 2LiBH₄+MgH ₂ system was modified by introducing Ni nanoparticles. Dehydrogenation analysis revealed that the first-step dehydrogenation, i.e., the decomposition of MgH₂, can be significantly promoted by adding a small amount of Ni because of the catalytic effect. However, the improvement of the second-step dehydrogenation, corresponding to the decomposition of LiBH ₄, needs the addition of a large amount of Ni, resulting in the formation of a Mg-Ni-B ternary alloy. Furthermore, the presence of the Mg-Ni-B ternary alloy allowed an increased reversible H-capacity, in which about 5.3 wt% of hydrogen can be rehydrogenated under 400 °C and 55 bar hydrogen pressure over 10 h, which is higher than that of the pristine 2LiBH₄+MgH ₂ system (4.4 wt%). Copyright © Materials Research Society 2011.

Original language	English
Pages (from-to)	1143-1150
Journal	Journal of Materials Research
Volume	26
Issue number	9
DOIs	https://doi.org/10.1557/jmr.2011.72
Publication status	Published - 14 May 2011
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

Financial support from Australian Research Council Discovery project (DP0878661) and the National Natural Science Foundation of China (Grant No. 51071047) are gratefully acknowledged.

Research Keywords

Absorption
Energy storage
Hydrogenation

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Cite this

@article{7eb244a4d8ca4dbca6c7d9b49dffddfd,

title = "Improved reversible dehydrogenation of 2LiBH4+MgH2 system by introducing Ni nanoparticles",

abstract = "We report that the hydrogen de/resorption of the 2LiBH4+MgH 2 system was modified by introducing Ni nanoparticles. Dehydrogenation analysis revealed that the first-step dehydrogenation, i.e., the decomposition of MgH2, can be significantly promoted by adding a small amount of Ni because of the catalytic effect. However, the improvement of the second-step dehydrogenation, corresponding to the decomposition of LiBH 4, needs the addition of a large amount of Ni, resulting in the formation of a Mg-Ni-B ternary alloy. Furthermore, the presence of the Mg-Ni-B ternary alloy allowed an increased reversible H-capacity, in which about 5.3 wt\% of hydrogen can be rehydrogenated under 400 °C and 55 bar hydrogen pressure over 10 h, which is higher than that of the pristine 2LiBH4+MgH 2 system (4.4 wt\%). Copyright {\textcopyright} Materials Research Society 2011.",

keywords = "Absorption, Energy storage, Hydrogenation",

author = "Jianfeng Mao and Zaiping Guo and Xuebin Yu and Huakun Liu",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

year = "2011",

month = may,

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doi = "10.1557/jmr.2011.72",

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TY - JOUR

T1 - Improved reversible dehydrogenation of 2LiBH4+MgH2 system by introducing Ni nanoparticles

AU - Mao, Jianfeng

AU - Guo, Zaiping

AU - Yu, Xuebin

AU - Liu, Huakun

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2011/5/14

Y1 - 2011/5/14

N2 - We report that the hydrogen de/resorption of the 2LiBH4+MgH 2 system was modified by introducing Ni nanoparticles. Dehydrogenation analysis revealed that the first-step dehydrogenation, i.e., the decomposition of MgH2, can be significantly promoted by adding a small amount of Ni because of the catalytic effect. However, the improvement of the second-step dehydrogenation, corresponding to the decomposition of LiBH 4, needs the addition of a large amount of Ni, resulting in the formation of a Mg-Ni-B ternary alloy. Furthermore, the presence of the Mg-Ni-B ternary alloy allowed an increased reversible H-capacity, in which about 5.3 wt% of hydrogen can be rehydrogenated under 400 °C and 55 bar hydrogen pressure over 10 h, which is higher than that of the pristine 2LiBH4+MgH 2 system (4.4 wt%). Copyright © Materials Research Society 2011.

AB - We report that the hydrogen de/resorption of the 2LiBH4+MgH 2 system was modified by introducing Ni nanoparticles. Dehydrogenation analysis revealed that the first-step dehydrogenation, i.e., the decomposition of MgH2, can be significantly promoted by adding a small amount of Ni because of the catalytic effect. However, the improvement of the second-step dehydrogenation, corresponding to the decomposition of LiBH 4, needs the addition of a large amount of Ni, resulting in the formation of a Mg-Ni-B ternary alloy. Furthermore, the presence of the Mg-Ni-B ternary alloy allowed an increased reversible H-capacity, in which about 5.3 wt% of hydrogen can be rehydrogenated under 400 °C and 55 bar hydrogen pressure over 10 h, which is higher than that of the pristine 2LiBH4+MgH 2 system (4.4 wt%). Copyright © Materials Research Society 2011.

KW - Absorption

KW - Energy storage

KW - Hydrogenation

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U2 - 10.1557/jmr.2011.72

DO - 10.1557/jmr.2011.72

M3 - RGC 21 - Publication in refereed journal

SN - 0884-2914

VL - 26

SP - 1143

EP - 1150

JO - Journal of Materials Research

JF - Journal of Materials Research

IS - 9

ER -