TY  - JOUR
AU  - Paskevicius, Mark
AU  - Filsø, Uffe
AU  - Karimi, Fahim
AU  - Puszkiel, Julián
AU  - Pranzas, Philipp Klaus
AU  - Pistidda, Claudio
AU  - Hoell, Armin
AU  - Welter, Edmund
AU  - Schreyer, Andreas
AU  - Klassen, Thomas
AU  - Dornheim, Martin
AU  - Jensen, Torben R.
TI  - Cyclic stability and structure of nanoconfined Ti-doped NaAlH<sub>4</sub>
JO  - International journal of hydrogen energy
VL  - 41
IS  - 7
SN  - 0360-3199
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - PUBDB-2016-05317
SP  - 4159 - 4167
PY  - 2016
N1  - (c) Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. Post referee full text in progress (embargo 1 year from 1 February 2016).
AB  - NaAlH4 was melt infiltrated within a CO<sub>2</sub> activated carbon aerogel, which had been preloaded with TiCl<sub>3</sub>. Nanoconfinement was verified by Small Angle X-Ray Scattering (SAXS) and the nature of the Ti was investigated with Anomalous SAXS (ASAXS) and X-Ray Absorption Near Edge Structure (XANES) to determine its size and chemical state. The Ti is found to be in a similar state to that found in the bulk Ti-doped NaAlH<sub>4</sub> system where it exists as Al<sub>1−x</sub>Ti<sub>x</sub> nanoalloys. Crystalline phases exist within the carbon aerogel pores, which are analysed by in-situ Powder X-Ray Diffraction (PXD) during hydrogen cycling. The in-situ data reveals that the hydrogen release from NaAlH<sub>4</sub> and its hydrogen uptake occurs through the Na<sub>3</sub>AlH<sub>6</sub> intermediate when confined at this size scale. The hydrogen capacity from the nanoconfined NaAlH<sub>4</sub> is found to initially be much higher in this CO<sub>2</sub> activated aerogel compared with previous studies into unactivated aerogels.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000372378100009
DO  - DOI:10.1016/j.ijhydene.2015.12.185
UR  - https://bib-pubdb1.desy.de/record/312128
ER  -