Synthesis of nanostructured Mg2FeH6 hydride and hydrogen sorption properties of complex

Autor:	Yi Liu, Song-lin Li, Jian-min Cui, Shu-ke Peng, Sheng-long Tang
Rok vydání:	2010
Předmět:	Materials science Hydrogen Hydride Cryo-adsorption Metallurgy Metals and Alloys chemistry.chemical_element Sorption Geotechnical Engineering and Engineering Geology Condensed Matter Physics Hydrogen storage chemistry Chemical engineering Desorption Materials Chemistry Ball mill Mass fraction
Zdroj:	Transactions of Nonferrous Metals Society of China. 20:2281-2288
ISSN:	1003-6326
DOI:	10.1016/s1003-6326(10)60641-3
Popis:	Reactive mechanical alloying (RMA) was carried out in a planetary ball mill for the synthesis of ternary hydride Mg2FeH6 for hydrogen storage. The formation mechanism of Mg2FeH6 in RMA process and the sorption properties of the products were investigated. The results show that Mg2FeH6 has a yield ratio around 80%, and a grain size below 10 nm in the powder synthesized by milling 3Mg+Fe mixture for 150 h under the hydrogen pressure of 1 MPa. The synthesized powder possesses a high hydrogen capacity and good sorption kinetics, and absorbs 4.42% (mass fraction) of hydrogen within 200 s at 623 K under the hydrogen pressure of 4.0 MPa. In releasing hydrogen at 653 K under 0.1 MPa, it desorbs 4.43% (mass fraction) of hydrogen within 2 000 s. The addition of Ti increases the hydrogen desorption rate of the complex in the initial 120 s of the desorption process.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::01a30e7436e21f0c8c23012c74967845 https://doi.org/10.1016/s1003-6326(10)60641-3 Zobrazit plný text záznamu Full Text from ScienceDirect