Catalytic Effect of Multi-Wall Carbon Nanotubes Supported Nickel on Hydrogen Storage Properties of Mg99Ni Prepared by Hydriding Combustion Synthesis

Autor:	Zhengwei Cui, Lingjun Wei, Liquan Li, Yunfeng Zhu
Rok vydání:	2014
Předmět:	Materials science Hydrogen Magnesium Mechanical Engineering Composite number Inorganic chemistry chemistry.chemical_element Carbon nanotube Condensed Matter Physics Combustion law.invention Hydrogen storage Nickel chemistry Mechanics of Materials law General Materials Science Dehydrogenation
Zdroj:	MATERIALS TRANSACTIONS. 55:1149-1155
ISSN:	1347-5320 1345-9678
Popis:	Multi-wall carbon nanotubes supported nickel (Nano-nickel/MWCNT) is added to the hydriding combustion synthesis (HCS) product of Mg99Ni by mechanical milling to yield a designed composite for improving the hydrogen storage properties of magnesium. It is revealed that there is a synergistic effect of nano-Mg2NiH4 and MWCNT on the hydrogen storage properties of Mg99Ni, which improves the hydrogenation and dehydrogenation performance when compared to adding either nano-Ni or MWCNT alone. The composite requires only 80 s to reach its saturated hydrogen capacity of 6.79mass% at 373K and desorbs 97.2% hydrogen within 1800 s at 543K. The dehydrogenation activation energy of this system is 105 kJmol11, which is much lower than that of as-received MgH2 (153 kJmol11). In addition, the composite preserves stable hydrogen storage capacity and kinetics in the hydrogenation/dehydrogenation cycles at 423K. [doi:10.2320/matertrans.MG201416]
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f43766c0d2ab859f71622d2f8be28bd2 https://doi.org/10.2320/matertrans.mg201416 Zobrazit plný text záznamu