Enhanced Low-Temperature Hydrogen Storage in Nanoporous Ni-Based Alloy Supported LiBH4

被引：14
作者：
Chen, Xi [1 ]
Li, Zhao [1 ]
Zhang, Yue [1 ]
Liu, Dongming [1 ]
Wang, Chunyang [1 ]
Li, Yongtao [1 ]
Si, Tingzhi [1 ]
Zhang, Qingan [1 ]
机构：
[1] Anhui Univ Technol, Sch Mat Sci & Engn, Maanshan, Peoples R China
来源：
FRONTIERS IN CHEMISTRY | 2020年 / 8卷
基金：
中国国家自然科学基金;
关键词：
hydrogen storage; lithium borohydride; nanoporous metal; nanoconfinement; catalysis; LITHIUM BOROHYDRIDE; DEHYDROGENATION; CARBON; REVERSIBILITY; DESORPTION; CAPACITY; DESTABILIZATION; NANOCONFINEMENT; NANOPARTICLES; PERFORMANCES;
D O I：
10.3389/fchem.2020.00283
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
To reveal the synergistic effect of nanoconfinement and metallic catalysis on the hydrogen storage properties of LiBH4, the nanoporous Ni-based alloy (np-Ni) was prepared herein by dealloying of the Mn70Ni30 alloy in (NH4)(2)SO4 solution, and then LiBH4 was loaded into np-Ni to construct the LiBH4/np-Ni hydrogen storage system using wet impregnation. It was found that dehydrogenation of the LiBH4/np-Ni (1:5) system starts at around 70 degrees C and ends before 400 degrees C, with similar to 11.9 wt.% of hydrogen desorbed. The apparent dehydrogenation activation energy for the LiBH4/np-Ni (1:5) system was remarkable decreased to about 11.4 kJ/mol. After rehydrogenation at 450 degrees C under 8 MPa hydrogen pressure, similar to 8.2 wt.% of hydrogen can be released from about 60 degrees C upon second dehydrogenation. These obtained results would provide an efficient strategy for improving the hydrogen storage properties of other metal borohydrides.
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页数：8
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