Active catalytic species generated in situ in zirconia incorporated hydrogen storage material magnesium hydride

ABSTRACTCerium in various chemical forms was introduced into NaAlH4 to study the hydrogen sorption properties of the resulted material. Although all the Ce precursors tested in this work resulted in a reversible hydrogen storage material, an immediate enhancement in the desorption kinetics could be achieved by a heating treatment, resulting in the in situ formation of cerium aluminide (CeAl4) in the material. While the use of CeAl4 instead of CeCl3 can increase the hydrogen capacity by bypassing the formation of the ineffective NaCl, the highest capacity of 4.9 wt% was obtained from NaAlH4 doped directly with commercial metallic cerium, which may provide a much simplified process for a possible up-scaling preparation of this hydrogen storage material.

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In-Situ TEM Observation for Reaction Mechanism in MgH2 Hydrogen Storage Material

Journal of the Japan Institute of Metals and Materials ◽

10.2320/jinstmet.74.205 ◽

2010 ◽

Vol 74 (3) ◽

pp. 205-208 ◽

Cited By ~ 2

Author(s):

Akifumi Ono ◽

Shigehito Isobe ◽

Yongming Wang ◽

Naoyuki Hashimoto ◽

Somei Ohnuki

Keyword(s):

Reaction Mechanism ◽

Hydrogen Storage ◽

In Situ Tem ◽

Hydrogen Storage Material ◽

Storage Material

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In situ solid state 11B MAS-NMR studies of the thermal decomposition of ammonia borane: mechanistic studies of the hydrogen release pathways from a solid state hydrogen storage material

Physical Chemistry Chemical Physics ◽

10.1039/b617781f ◽

2007 ◽

Vol 9 (15) ◽

pp. 1831 ◽

Cited By ~ 290

Author(s):

Ashley C. Stowe ◽

Wendy J. Shaw ◽

John C. Linehan ◽

Benjamin Schmid ◽

Tom Autrey

Keyword(s):

Thermal Decomposition ◽

Solid State ◽

Hydrogen Storage ◽

Mas Nmr ◽

Hydrogen Release ◽

Mechanistic Studies ◽

Hydrogen Storage Material ◽

Storage Material ◽

Nmr Studies

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In Situ Hydrogenation and Desulfurization of CS2 by Mg-Based Hydrogen Storage Material:Products and Mechanism Analysis

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.726-731.668 ◽

2013 ◽

Vol 726-731 ◽

pp. 668-672

Author(s):

Tong Huan Zhang ◽

Min Jian Yang ◽

Peng Bo Li ◽

Wei Xian Ran ◽

Qian Qian Zhang ◽

...

Keyword(s):

Hydrogen Storage ◽

Ball Milling ◽

Hydrogen Desorption ◽

Mechanism Analysis ◽

Hydrogen Storage Material ◽

Storage Material ◽

Coupling Relationship ◽

Negative Effect ◽

Sulfur Fixation

Mg-based hydrogen storage material was prepared by ball milling, and then the material was used to react with CS2. The morphology and hydrogen desorption properties of the hydrogen storage material as well as the CS2hydrogenation product were analyzed. Results show that in situ hydrogenation and desulfurization of CS2happens with the MgH2in the hydrogen storage material as hydrogen donator and desulfurizer at 300 °C and ordinary pressure, and MgS, CH4and H2S are generated from the reaction. There is a coupling relationship between dehydrogenation of the hydrogen storage material and hydrogenation of CS2. The addition of nickel and molybdenum show negative effect on the sulfur fixation capability of the Mg-based hydrogen storage material though they could decrease the dehydrogenation temperature of the material.

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Small-angle scattering investigations of magnesium hydride used as a hydrogen storage material

Journal of Applied Crystallography ◽

10.1107/s0021889807008023 ◽

2007 ◽

Vol 40 (s1) ◽

pp. s383-s387 ◽

Cited By ~ 14

Author(s):

Phillip Klaus Pranzas ◽

Martin Dornheim ◽

Ulrike Bösenberg ◽

Jose Ramon Ares Fernandez ◽

Guenter Goerigk ◽

...

Keyword(s):

Hydrogen Storage ◽

Small Angle ◽

Magnesium Hydride ◽

Small Angle Scattering ◽

Hydrogen Storage Material ◽

Storage Material ◽

Angle Scattering

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Improved kinetic behaviour of Mg(NH2)2-2LiH doped with nanostructured K-modified-LixTiyOz for hydrogen storage

Scientific Reports ◽

10.1038/s41598-019-55770-y ◽

2020 ◽

Vol 10 (1) ◽

Cited By ~ 3

Author(s):

Gökhan Gizer ◽

Julián Puszkiel ◽

Maria Victoria Castro Riglos ◽

Claudio Pistidda ◽

José Martín Ramallo-López ◽

...

Keyword(s):

Hydrogen Storage ◽

Hydrogen Storage Material ◽

Storage Material ◽

Hydrogen Capacity ◽

Kinetic Behaviour ◽

Enhanced Absorption ◽

Tiny Amount ◽

Slow Absorption ◽

Kinetic Barriers

AbstractThe system Mg(NH2)2 + 2LiH is considered as an interesting solid-state hydrogen storage material owing to its low thermodynamic stability of ca. 40 kJ/mol H2 and high gravimetric hydrogen capacity of 5.6 wt.%. However, high kinetic barriers lead to slow absorption/desorption rates even at relatively high temperatures (>180 °C). In this work, we investigate the effects of the addition of K-modified LixTiyOz on the absorption/desorption behaviour of the Mg(NH2)2 + 2LiH system. In comparison with the pristine Mg(NH2)2 + 2LiH, the system containing a tiny amount of nanostructured K-modified LixTiyOz shows enhanced absorption/desorption behaviour. The doped material presents a sensibly reduced (∼30 °C) desorption onset temperature, notably shorter hydrogen absorption/desorption times and reversible hydrogen capacity of about 3 wt.% H2 upon cycling. Studies on the absorption/desorption processes and micro/nanostructural characterizations of the Mg(NH2)2 + 2LiH + K-modified LixTiyOz system hint to the fact that the presence of in situ formed nanostructure K2TiO3 is the main responsible for the observed improved kinetic behaviour.

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