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DOI	10.1039/d0ee03160g
	Realizing 6.7 wt% reversible storage of hydrogen at ambient temperature with non-confined ultrafine magnesium hydrides
	Zhang X.; Liu Y.; Ren Z.; Zhang X.; Hu J.; Huang Z.; Lu Y.; Gao M.; Pan H.
发表日期	2021
ISSN	17545692
起始页码	2302
结束页码	2313
卷号	14 期号:4
英文摘要	Using light metal hydrides as hydrogen carriers is of particular interest for safe and compact storage of hydrogen. Magnesium hydride (MgH2) has attracted significant attention due to its 7.6 wt% hydrogen content and the natural abundance of Mg. However, bulk MgH2 is stable (ΔHf ∼ 76 kJ mol-1) and releases hydrogen only at impractically high temperatures (>300 °C). Herein, we demonstrate a first attempt to achieve ambient-temperature reversibility of hydrogen storage for MgH2 by fabricating non-confined ultrafine nanoparticles. Taking advantage of the big discrepancies in the solubility of metal hydrides and chlorides in THF, a novel metathesis process of liquid-solid phase driven by ultrasound was proposed. Ultrafine MgH2 nanoparticles predominantly of around 4-5 nm in size were successfully obtained without scaffolds or supports. A reversible hydrogen storage capacity of 6.7 wt% at 30 °C was measured, which has never been achieved before, thanks to thermodynamic destabilization and decreased kinetic barriers. The bare nanoparticles exhibited a stable and rapid hydrogen cycling behaviour in 50 cycles at 150 °C, a remarkable improvement compared with bulk MgH2. Our finding brings MgH2 a step closer to practical applications and the methodology presented here opens new pathways for fabricating sensitive nanoparticles. This journal is © The Royal Society of Chemistry.
英文关键词	Chlorine compounds; Hafnium compounds; Hydrides; Hydrogen storage; Nanoparticles; Scaffolds; Temperature; Hydrogen carriers; Hydrogen contents; Hydrogen storage capacities; Magnesium hydride; Metathesis process; Natural abundance; Reversible storage; Ultra-fine nanoparticles; Magnesium compounds; gas storage; hydration; hydrogen; magnesium; temperature
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190706
作者单位	State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China; School of Chemistry and Chemical Engineering, Yantai University, Yantai, 264005, China; School of Civil and Environmental Engineering, University of Technology Sydney, 81 Broadway, Ultimo, NSW 2007, Australia; Zhejiang Province Key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang University, Hangzhou, 310027, China
推荐引用方式 GB/T 7714	Zhang X.,Liu Y.,Ren Z.,et al. Realizing 6.7 wt% reversible storage of hydrogen at ambient temperature with non-confined ultrafine magnesium hydrides[J],2021,14(4).
APA	Zhang X..,Liu Y..,Ren Z..,Zhang X..,Hu J..,...&Pan H..(2021).Realizing 6.7 wt% reversible storage of hydrogen at ambient temperature with non-confined ultrafine magnesium hydrides.Energy & Environmental Science,14(4).
MLA	Zhang X.,et al."Realizing 6.7 wt% reversible storage of hydrogen at ambient temperature with non-confined ultrafine magnesium hydrides".Energy & Environmental Science 14.4(2021).