标题：Crystallitic structure and thermodynamics of magnesium-based hydrogen storage materials from reactive milling under hydrogen atmosphere
作者：Zhou, Shixue; Zhang, Qianqian; Wang, Naifei; Han, Zongying; Ran, Weixian; Li, Changzhen; Ding, Chao; Li, Pengbo
作者机构：[Zhou, Shixue; Zhang, Qianqian; Wang, Naifei; Han, Zongying; Ran, Weixian; Li, Changzhen; Ding, Chao; Li, Pengbo] Shandong Univ Sci & Technol, Coll Ch 更多
会议名称：2nd International Conference on Energy and Environmental Protection (ICEEP 2013)
会议日期：APR 19-21, 2013
来源：APPLIED ENERGY TECHNOLOGY, PTS 1 AND 2
关键词：Magnesium; Hydrogen storage material; Reactive milling; Crystallitic; structure; Thermodynamics
摘要：Magnesium-based hydrogen storage materials were prepared by reactive milling of magnesium under hydrogen atmosphere with crystallitic carbon, prepared from anthracite coal, as milling aid. The NRD analysis shows that in the presence of 30 wt.% of crystallitic carbon, the Mg easily hydrided into beta-MgH2 of crystal gtain size 29.7 nm and a small amount of gamma-MgH2 after 3 h of milling under 1 MPa H-2. The enthalpy and entropy changes of the hydrogen desorption reaction are 42.7 kJ/mol and 80.7 J/mol K, respectively, calculated by the van't Hoff equation from the p-C-T data in 300-380 degrees C.