Superstoichiometric Alloying of H and Close‐Packed Fe‐Ni Metal Under High Pressures: Implications for Hydrogen Storage in Planetary Core
Superstoichiometric Alloying of H and Close‐Packed Fe‐Ni Metal Under High Pressures: Implications for Hydrogen Storage in Planetary Core
复制标题
高压下 H 和密堆积 Fe-Ni 金属的超化学计量合金化:对行星核心储氢的影响
DOI:
10.1029/2022gl101155
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发表时间:
2023
影响因子:
5.2
通讯作者:
Shim, Sang‐Heon
中科院分区:
文献类型:
--
作者:
Piet, Hélène;Chizmeshya, Andrew;Chen, Bin;Chariton, Stella;Greenberg, Eran;Prakapenka, Vitali;Buseck, Peter;Shim, Sang‐Heon
Although high pressure enables alloying between hydrogen and iron, hydrogen‐to‐iron molar ratio (H/Fe) so far found in experiments is mostly limited to 1 in the close‐packed iron metal under high pressure. We report a H/(Fe + Ni) ratio of 1.8 ± 0.1 from (Fe,Ni)Hx(orx≥ 1.8) quenched from liquid, exceeding the amounts so far reported for densely packed Fe alloys. From the metastable behavior of the frozen (Fe,Ni)Hxliquid during decompression, we infer that the amount is a lower bound and therefore even a greater amount of H can be dissolved in the liquid part of Fe‐rich cores of planets. The significant H storage capacity of liquid Fe‐Ni alloy is important to consider for potential storage of H in the interiors of low‐density planets as well as rocky planets.
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DOI:
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发表时间:
2013
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