Towards an understanding of the beneficial effect of mesoporous materials on dehydrogenation characteristics of NH3BH3

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Show simple item record Sullivan, James A. Herron, Rory Phillips, Andrew D. 2016-08-23T14:19:51Z 2016 Elsevier en 2016
dc.identifier.citation Applied Catalysis B: Environmental en
dc.description.abstract Ammonia borane (AB) was loaded onto a range of mesoporous materials (MCM-41, SBA-15 and MCF) by wet impregnation from THF solutions and its thermal dehydrogenation studied using TGA/MS. The interactions between the AB and the surfaces were characterised using difference FTIR spectroscopy. The presence of mesoporous materials promotes lower temperature H2 release, and greater selectivity towards the formation of H2, i.e. decreased formation of gaseous boroncontaining side products. D-FTIR results confirm interactions between isolated silanol groups or surface Si-O-Si species and AB and this supports the proposal that a H-bonding interaction between the surface and deposited AB is important in promoting decomposition at lower temperature. AB interacting with silanol groups decomposes more readily than that coordinated to Si-O-Si. The effect on the temperature of H2 release is greater for materials of larger pore size (rather than materials of larger surface area), i.e. MCF>SBA-15>MCM-41. This suggests that access to the internal surface of the mesoporous material (where the majority of surface silanols are located) is important, and this in turn suggests that polymeric species, which may have restricted access to the internal surface of the different materials, form when AB is dissolved in THF. Decomposition of B-N-containing gaseous materials (to AB(g)) following their formation, on the silanol groups of the SiO2, is suggested as the reason for the increased selectivity of the reaction to H2 (and decreased release of unwanted side products) in the presence of mesoporous material. en
dc.description.sponsorship Science Foundation Ireland en
dc.language.iso en en
dc.publisher Elsevier en
dc.rights This is the author’s version of a work that was accepted for publication in Applied Catalysis B: Environmental. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Catalysis B: Environmental (VOL#, ISSUE#, (2016)) DOI: 10.1016/j.apcatb.2016.08.040. en
dc.subject Ammoniaborane en
dc.subject Hydrogen storage en
dc.subject Mesoporous SiO2 en
dc.subject Thermal analysis en
dc.title Towards an understanding of the beneficial effect of mesoporous materials on dehydrogenation characteristics of NH3BH3 en
dc.type Journal Article en
dc.status Peer reviewed en
dc.identifier.doi 10.1016/j.apcatb.2016.08.040
dc.neeo.contributor Sullivan|James A.|aut|
dc.neeo.contributor Herron|Rory|aut|
dc.neeo.contributor Phillips|Andrew D.|aut| 2018-08-17
dc.internal.rmsid 637655040 2016-08-17T09:12:17Z
 Access to this item has been restricted by the copyright holder until: 2018-08-17

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