Stability and bonding nature of tin borohydride
Stability and bonding nature of tin borohydride
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硼氢化锡的稳定性和键合性质
DOI:
10.1016/j.ijhydene.2020.06.197
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发表时间:
2020-09
影响因子:
7.2
通讯作者:
Hongshan Chen
中科院分区:
文献类型:
--
作者:
Li Ma;Tao Zhou;Hongshan Chen
Hydrogen in borohydrides M(BH4)nform BH4−unit and the binding strength is dominated by the B–H bonds. The M−H interactions regulate the B–H bonds and the stabilities depend on the electron donor properties of metal atoms M. The crystal structures of Sn(BH4)4are determined by using global optimization algorithm combined with density functional theories, and the stabilities, electronic properties and bonding natures are systematically compared with other borohydrides of Zr, Al, Mg, Na. Sn transfers 41% of its valence electrons while Na/Mg transfers 84%/82%. The Sn–H bond is of covalent nature with strong polarities, and the covalent Sn–H interaction weakens the B–H bonds. The covalent interactions of different bonds are evaluated using crystal orbital Hamilton populations (COHPs). The results show that both the ionic and covalent interactions of the B–H bonds are obviously weaker in Sn(BH4)4than in other borohydrides. With hydrogen content of 9.0 wt%, Sn(BH4)4may be a promising hydrogen storage material working at moderate temperatures.
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影响因子:
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通讯作者:
Y. Nakamori;Haiwen Li;K. Miwa;S. Towata;S. Orimo
影响因子:
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影响因子:
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通讯作者:
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