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Hydrogen storage and release: Kinetic and thermodynamic studies of MgH2 activated by transition metal nanoparticles
- Source :
- International Journal of Hydrogen Energy, International Journal of Hydrogen Energy, Elsevier, 2014, 39, pp.11633-11641. ⟨10.1016/j.ijhydene.2014.05.069⟩
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- EAU:ENERGIE+HYU:SBE:AAU; Commercial metal nanoparticles of Fe, Co, Ni, Cu, Zn were added to MgH2 by ball-milling to improve the kinetics of hydrogen release and the reversibility during successive absorption/desorption cycles. metal nanoparticles were well dispersed into the MgH2 matrix without formation of any ternary metal hydrides, nor binary compounds. Activation energy values were determined for the various samples by temperature programmed desorption experiments while the hydride formation enthalpy was deduced from Van't Hoff equation starting from high pressure volumetric isotherms acquired at different temperatures. The presence of transient effect during the absorption process was excluded by comparing successive hydrogenation/dehydrogenation cycles recorded at 350 degrees C on Ni and Fe-containing samples. Information about hydrogen absorption kinetics was also obtained. Promisingly, the Ni, Fe, and Co containing samples have shown a good stability, enhanced catalytic performance, and high rate of hydrogen absorption while Zn and Cu nanoparticles worked more like inhibitors than activators. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
- Subjects :
- Hydrogen
Renewable Energy, Sustainability and the Environment
Hydride
Thermal desorption spectroscopy
Magnesium hydride
Inorganic chemistry
Energy Engineering and Power Technology
chemistry.chemical_element
[CHIM.CATA]Chemical Sciences/Catalysis
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
[SDE.ES]Environmental Sciences/Environmental and Society
01 natural sciences
0104 chemical sciences
Catalysis
chemistry.chemical_compound
Hydrogen storage
Fuel Technology
chemistry
Desorption
Dehydrogenation
0210 nano-technology
Subjects
Details
- ISSN :
- 03603199
- Volume :
- 39
- Database :
- OpenAIRE
- Journal :
- International Journal of Hydrogen Energy
- Accession number :
- edsair.doi.dedup.....abaed98e4438541c9f6b5c933e74df0a