Low-temperature hydrogen desorption from Mg(BH4)2 catalysed by ultrafine Ni nanoparticles in a mesoporous carbon matrix

Mohammad A Wahab; David James Young; Azharul Karim; Sabrina Fawzia; Jorge N Betramini

doi:10.1016/j.ijhydene.2016.09.098

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Low-temperature hydrogen desorption from Mg(BH4)2 catalysed by ultrafine Ni nanoparticles in a mesoporous carbon matrix

Journal article

Peer reviewed

Low-temperature hydrogen desorption from Mg(BH4)2 catalysed by ultrafine Ni nanoparticles in a mesoporous carbon matrix

Mohammad A Wahab, David James Young, Azharul Karim, Sabrina Fawzia and Jorge N Betramini

International Journal of Hydrogen Energy, Vol.41(45), pp.20573-20582

2016

DOI: https://doi.org/10.1016/j.ijhydene.2016.09.098

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Abstract

hydrogen storage

Mg(BH4)2

porous carbon

nanoconfinement

catalysis

synergistic effects

Homogenously dispersed, ultrafine Ni nanoparticles (Ni NPs) have been grown in a mesoporous carbon (MC) matrix (MC-Niinsitu) and efficiently catalyze low-temperature hydrogen desorption from Mg(BH4)2. The onset desorption temperature (Tonset) of this MC-Niinsitu-Mg(BH4)2 system is 44 °C compared to 275 °C (Tonset) for pure Mg(BH4)2. This is the lowest value reported for hydrogen desorption from this metal hydride. The activation energy (Ea) of MC-Niinsitu-Mg(BH4)2 was determined to be 21.3 kJ/mol which is less than half the value of 45.9 kJ/mol for pure Mg(BH4)2. We ascribe this reduction to the synergistic effects of nanoconfinement and the homogeneously dispersed, ultrafine Ni NPs active sites in the mesoporous carbon.

Details

Title: Low-temperature hydrogen desorption from Mg(BH4)2 catalysed by ultrafine Ni nanoparticles in a mesoporous carbon matrix
Authors: Mohammad A Wahab (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
David James Young (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Azharul Karim (Author) - Queensland University of Technology
Sabrina Fawzia (Author) - Queensland University of Technology
Jorge N Betramini (Author) - University of Queensland
Publication details: International Journal of Hydrogen Energy, Vol.41(45), pp.20573-20582
Publisher: Elsevier Ltd.
Date published: 2016
DOI: 10.1016/j.ijhydene.2016.09.098
ISSN: 0360-3199
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99451282502621
Output Type: Journal article

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