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Catalytic effect of Ni, Mg2Ni and Mg2NiH4 upon hydrogen desorption from MgH2
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SYSNO ASEP 0369588 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Catalytic effect of Ni, Mg2Ni and Mg2NiH4 upon hydrogen desorption from MgH2 Author(s) Čermák, Jiří (UFM-A) RID, ORCID
David, Bohumil (UFM-A) RIDNumber of authors 2 Source Title International Journal of Hydrogen Energy. - : Elsevier - ISSN 0360-3199
Roč. 36, č. 21 (2011), s. 13614-13620Number of pages 7 s. Language eng - English Country US - United States Keywords MgH2 ; Hydrogen storage ; Hydrogen desorption ; Catalysis Subject RIV JG - Metallurgy R&D Projects GA106/09/0814 GA ČR - Czech Science Foundation (CSF) GAP108/11/0148 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000296208800030 DOI 10.1016/j.ijhydene.2011.07.133 Annotation MgH2 is a perspective hydrogen storage material whose main advantage is a relatively high hydrogen storage capacity (theoretically, 7.6 wt.% H2). This compound, however, shows poor hydrogen desorption kinetics. Much effort was devoted in the past to finding possible ways of enhancing hydrogen desorption rate from MgH2, which would bring this material closer to technical applications. One possible way is catalysis of hydrogen desorption. This paper investigates separate catalytic effects of Ni, Mg2Ni and Mg2NiH4 on the hydrogen desorption characteristics of MgH2. It was observed that the catalytic efficiency of Mg2NiH4 was considerably higher than that of pure Ni and non-hydrated intermetallic Mg2Ni. The Mg2NiH4 phase has two low-temperature modifications below 508 K: un-twinned phase LT1 and micro-twinned phase LT2. LT1 was observed to have significantly higher catalytic efficiency than LT2. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2012
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