Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 39, Issue 21, Pages 11103-11109Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2014.05.087
Keywords
Nanoconfinement; CMK-1; NaAlH4; Scaffold; Hydrogen storage; Infiltration
Categories
Funding
- Thai Government
- Ministry of Science and Technology
- Mae Fah Luang University
- Australian Research Council (ARC) [LP120101848]
- ARC LIEF [LE0989180, LE0775551]
- ARC RIEF [R00107962]
- University Government
- State Government
- Commonwealth Government
- Danish National Research Foundation, Center for Materials Crystallography [DNRF93]
- Danish Strategic Research Council
- Carlsberg Foundation
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An ordered mesoporous carbon scaffold (CMK-1) has been synthesized and infiltrated with NaAlH4 nanoparticles by solvent- and melt-infiltration techniques. Small angle X-ray scattering (SAXS), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Transmission Electron Microscopy (TEM) and energy dispersive spectroscopy (EDS) are used to characterize the structure, composition and morphology before and after thermal treatment. This study illuminates some of the problems that can be associated with nanoconfinement of hydrogen storage materials including scaffold contamination, residual solvent contamination, sample morphology changes after heating, and other factors that can be detrimental to the application of these systems. Of particular interest is the expulsion of NaAlH4 decomposition products from the scaffold after heating beyond its melting point under vacuum. This results in the surface of mesoporous carbon particles having arrays of multi-micron-long Al filaments that are >100 nm in diameter. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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