Enhanced hydrogen desorption from Mg (BH4)2 by combining nanoconfinement and a Ni catalyst

Wahab, M. Abdul, Jia, Yi (Alec), Yang, Dongjiang, Zhao, Huijun and Yao, Xiangdong (2013) Enhanced hydrogen desorption from Mg (BH4)2 by combining nanoconfinement and a Ni catalyst. Journal of Materials Chemistry A, 1 10: 3471-3478. doi:10.1039/c2ta00899h

Author Wahab, M. Abdul
Jia, Yi (Alec)
Yang, Dongjiang
Zhao, Huijun
Yao, Xiangdong
Title Enhanced hydrogen desorption from Mg (BH4)2 by combining nanoconfinement and a Ni catalyst
Formatted title
Enhanced hydrogen desorption from Mg(BH4)2 by combining nanoconfinement and a Ni catalyst
Journal name Journal of Materials Chemistry A   Check publisher's open access policy
ISSN 2050-7488
Publication date 2013-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1039/c2ta00899h
Open Access Status Not Open Access
Volume 1
Issue 10
Start page 3471
End page 3478
Total pages 8
Place of publication Cambridge, United Kingdom
Publisher R S C Publications
Language eng
Subject 1600 Chemistry
2105 Renewable Energy, Sustainability and the Environment
2500 Materials Science
Abstract Magnesium borohydride (Mg(BH4)2) has been infiltrated into highly ordered mesoporous carbon (CMK3) containing dispersed Ni nanoparticles (Ni NPs) to investigate the possible synergetic effects of nanoconfinement and catalysis by Ni NPs. Ni NPs (5 wt%) were introduced into the CMK3 nanoscaffold (CMK3–Ni) then Mg(BH4)2 was slowly infiltrated into this prepared CMK3–Ni template to synthesize a CMK3–Ni confined (Mg(BH4)2) system (denoted as CMK3–Ni–Mg(BH4)2). Solid-state 11B NMR and FT-IR spectra confirmed that Mg(BH4)2 was in the pores of CMK3–Ni. Temperature-programmed desorption mass spectroscopy (TPD-MS) and pressure–composition–temperature (PCT) measurements were utilized to study the hydrogen desorption properties for this nanoconfined CMK3–Ni–Mg(BH4)2 system, which was demonstrated to be remarkably improved, e.g. the hydrogen desorption temperature was dramatically decreased and the release rate was significantly enhanced. The hydrogen started to be released from the CMK3–Ni–Mg(BH4)2 at a temperature of only 75 C (measured by TPD) and reached its peak release rate at a temperature of 155 C, compared with 270 C and above 350 C respectively from pure Mg(BH4)2. To the best of our knowledge, this is the first time Mg(BH4)2 decomposition has been realized at a temperature below 100 C, which is of great significance for the use of this material for practical hydrogen storage for proton exchange membrane fuel cells (PEMFCs).
Keyword Magnesium borohydride
Ni nanoparticles
Hydrogen desorption
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
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