Dehydrogenation and reaction pathway of Perovskite-Type NH4Ca(BH4)3

Chengguang Lang; Yi Jia; Jiangwen Liu; Hui Wang; Liuzhang Ouyang; Min Zhu; Xiangdong Yao

doi:10.1016/j.pnsc.2018.02.002

Dehydrogenation and reaction pathway of Perovskite-Type NH₄Ca(BH₄)₃

Chengguang Lang
, Yi Jia
, Jiangwen Liu
, Hui Wang
, Liuzhang Ouyang
, Min Zhu
, Xiangdong Yao

School of Energy and Power Engineering

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

8 Scopus citations

Abstract

Perovskite-type borohydride, NH₄Ca(BH₄)₃, is considered as a promising hydrogen storage material due to its high gravimetric hydrogen capacity (15.7 wt%). In this work, the dehydrogenation performance and reaction pathway of NH₄Ca(BH₄)₃ have been systematically investigated. It is found that the initial decomposition temperature is only 65 °C, suggesting a low thermodynamic stability of NH₄Ca(BH₄)₃. The desorption kinetics conducted by differential scanning calorimetry (DSC) indicates that the activation energy of decomposition is about 226.1 kJ/mol. The dehydrogenation pathway of NH₄Ca(BH₄)₃ characterized by fourier-transform infrared spectroscopy (FTIR) and solid-state nuclear magnetic resonance (NMR) shows a stepwise decomposition process, in which the initial dehydrogenation is due to destabilization of H⁺ in NH₄ and H^- in BH₄ followed by the subsequent dehydrogenation steps arising from the decomposition of homologous NH₃BH₃ and the final decomposition of Ca(BH₄)₂ at a high temperature, respectively.

Original language	English
Pages (from-to)	194-199
Number of pages	6
Journal	Progress in Natural Science
Volume	28
Issue number	2
DOIs	https://doi.org/10.1016/j.pnsc.2018.02.002
State	Published - Apr 2018

Keywords

Hydrogen storage materials
Metal borohydride
NHCa(BH)
Perovskite
Solid-state NMR

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10.1016/j.pnsc.2018.02.002

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@article{23627f6529ea448fbc211a28edb4ffcc,

title = "Dehydrogenation and reaction pathway of Perovskite-Type NH4Ca(BH4)3 ",

abstract = "Perovskite-type borohydride, NH4Ca(BH4)3, is considered as a promising hydrogen storage material due to its high gravimetric hydrogen capacity (15.7 wt\%). In this work, the dehydrogenation performance and reaction pathway of NH4Ca(BH4)3 have been systematically investigated. It is found that the initial decomposition temperature is only 65 °C, suggesting a low thermodynamic stability of NH4Ca(BH4)3. The desorption kinetics conducted by differential scanning calorimetry (DSC) indicates that the activation energy of decomposition is about 226.1 kJ/mol. The dehydrogenation pathway of NH4Ca(BH4)3 characterized by fourier-transform infrared spectroscopy (FTIR) and solid-state nuclear magnetic resonance (NMR) shows a stepwise decomposition process, in which the initial dehydrogenation is due to destabilization of H+ in NH4 and H- in BH4 followed by the subsequent dehydrogenation steps arising from the decomposition of homologous NH3BH3 and the final decomposition of Ca(BH4)2 at a high temperature, respectively.",

keywords = "Hydrogen storage materials, Metal borohydride, NHCa(BH), Perovskite, Solid-state NMR",

author = "Chengguang Lang and Yi Jia and Jiangwen Liu and Hui Wang and Liuzhang Ouyang and Min Zhu and Xiangdong Yao",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = apr,

doi = "10.1016/j.pnsc.2018.02.002",

language = "英语",

volume = "28",

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journal = "Progress in Natural Science",

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TY - JOUR

T1 - Dehydrogenation and reaction pathway of Perovskite-Type NH4Ca(BH4)3

AU - Lang, Chengguang

AU - Jia, Yi

AU - Liu, Jiangwen

AU - Wang, Hui

AU - Ouyang, Liuzhang

AU - Zhu, Min

AU - Yao, Xiangdong

PY - 2018/4

Y1 - 2018/4

N2 - Perovskite-type borohydride, NH4Ca(BH4)3, is considered as a promising hydrogen storage material due to its high gravimetric hydrogen capacity (15.7 wt%). In this work, the dehydrogenation performance and reaction pathway of NH4Ca(BH4)3 have been systematically investigated. It is found that the initial decomposition temperature is only 65 °C, suggesting a low thermodynamic stability of NH4Ca(BH4)3. The desorption kinetics conducted by differential scanning calorimetry (DSC) indicates that the activation energy of decomposition is about 226.1 kJ/mol. The dehydrogenation pathway of NH4Ca(BH4)3 characterized by fourier-transform infrared spectroscopy (FTIR) and solid-state nuclear magnetic resonance (NMR) shows a stepwise decomposition process, in which the initial dehydrogenation is due to destabilization of H+ in NH4 and H- in BH4 followed by the subsequent dehydrogenation steps arising from the decomposition of homologous NH3BH3 and the final decomposition of Ca(BH4)2 at a high temperature, respectively.

AB - Perovskite-type borohydride, NH4Ca(BH4)3, is considered as a promising hydrogen storage material due to its high gravimetric hydrogen capacity (15.7 wt%). In this work, the dehydrogenation performance and reaction pathway of NH4Ca(BH4)3 have been systematically investigated. It is found that the initial decomposition temperature is only 65 °C, suggesting a low thermodynamic stability of NH4Ca(BH4)3. The desorption kinetics conducted by differential scanning calorimetry (DSC) indicates that the activation energy of decomposition is about 226.1 kJ/mol. The dehydrogenation pathway of NH4Ca(BH4)3 characterized by fourier-transform infrared spectroscopy (FTIR) and solid-state nuclear magnetic resonance (NMR) shows a stepwise decomposition process, in which the initial dehydrogenation is due to destabilization of H+ in NH4 and H- in BH4 followed by the subsequent dehydrogenation steps arising from the decomposition of homologous NH3BH3 and the final decomposition of Ca(BH4)2 at a high temperature, respectively.

KW - Hydrogen storage materials

KW - Metal borohydride

KW - NHCa(BH)

KW - Perovskite

KW - Solid-state NMR

UR - https://www.scopus.com/pages/publications/85043569883

U2 - 10.1016/j.pnsc.2018.02.002

DO - 10.1016/j.pnsc.2018.02.002

M3 - 文章

AN - SCOPUS:85043569883

SN - 1002-0071

VL - 28

SP - 194

EP - 199

JO - Progress in Natural Science

JF - Progress in Natural Science

IS - 2

ER -

Dehydrogenation and reaction pathway of Perovskite-Type NH₄Ca(BH₄)₃

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