Metal-loaded SBA-16-like silica – Correlation between basicity and affinity towards hydrogen

[Display omitted] •Metal dispersion in longitudinal channels confers adsorption properties to SBA-16.•Both Fe0-NPs and Cu0-NPs seem to be responsible of this effect.•Effect of the repetitive adsorption-desorption cycles on CO2 and water sorption.•Hydrogen storage on the functionalized materials. Nan...

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Bibliographic Details
Published in:Applied surface science 2017-07, Vol.411, p.476-486
Main Authors: Ouargli-Saker, R., Bouazizi, N., Boukoussa, B., Barrimo, Diana, Paola-Nunes-Beltrao, Ana, Azzouz, A.
Format: Article
Language:English
Subjects:
Copper nanoparticles
Hydrogen storage
Iron nanoparticles
SBA-16
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Summary:[Display omitted] •Metal dispersion in longitudinal channels confers adsorption properties to SBA-16.•Both Fe0-NPs and Cu0-NPs seem to be responsible of this effect.•Effect of the repetitive adsorption-desorption cycles on CO2 and water sorption.•Hydrogen storage on the functionalized materials. Nanoparticles of Cuo (CuNPs) and Feo (FeNPs) were dispersed in SBA-16-like silica, resulting metal-loaded materials (Cu-SBA-16 and Fe-SBA-16) with improved affinity towards hydrogen. Electron microscopy and X-ray diffraction showed that MNP dispersion occurs mainly inside SBA-16 channels. MNP incorporation was found to confer affinity to the silica surface, since higher CO2 retention capacity (CRC) was registered Cu/SBA-16 and Fe/SBA-16. This was accompanied by a significant improvement of the affinity towards hydrogen, as supported by hydrogen adsorption tests. This was explained in terms of strong hydrogen interaction with MNP and lattice oxygen atoms. The results reported herein open new prospects for SBA-16 as potential adsorbents for hydrogen storage.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2017.03.165