globalchange  > 气候变化与战略
DOI: 10.1073/pnas.0610332104
论文题名:
High-pressure/low-temperature neutron scattering of gas inclusion compounds: Progress and prospects
作者: Zhao Y.; Xu H.; Daemen L.L.; Lokshin K.; Tait K.T.; Mao W.L.; Luo J.; Currier R.P.; Hickmott D.D.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2007
卷: 104, 期:14
起始页码: 5727
结束页码: 5731
语种: 英语
英文关键词: Framework-pressurizing effect ; Hydrogen storage ; Inelastic neutron scattering ; Neutron diffraction
Scopus关键词: benzene derivative ; carboxylic acid derivative ; cobalt derivative ; copper derivative ; hydrogen ; methane ; hydrogen ; water ; article ; energy resource ; gas ; hydrogen bond ; low temperature ; molecular stability ; neutron scattering ; pressure ; priority journal ; chemical model ; chemical structure ; chemistry ; equipment design ; gas ; instrumentation ; methodology ; neutron diffraction ; synthesis ; temperature ; Equipment Design ; Gases ; Hydrogen ; Hydrogen Bonding ; Methane ; Models, Chemical ; Models, Molecular ; Neutron Diffraction ; Pressure ; Temperature ; Water
英文摘要: Alternative energy resources such as hydrogen and methane gases are becoming increasingly important for the future economy. A major challenge for using hydrogen is to develop suitable materials to store it under a variety of conditions, which requires systematic studies of the structures, stability, and kinetics of various hydrogen-storing compounds. Neutron scattering is particularly useful for these studies. We have developed high-pressure/low- temperature gas/fluid cells in conjunction with neutron diffraction and inelastic neutron scattering instruments allowing in situ and real-time examination of gas uptake/release processes. We studied the formation of methane and hydrogen clathrates, a group of inclusion compounds consisting of frameworks of hydrogen-bonded H2O molecules with gas molecules trapped inside the cages. Our results reveal that clathrate can store up to four hydrogen molecules in each of its large cages with an intermolecular H 2-H2 distance of only 2.93 Å. This distance is much shorter than that in the solid/metallic hydrogen (3.78 Å), suggesting a strong densification effect of the clathrate framework on the enclosed hydrogen molecules. The framework-pressurizing effect is striking and may exist in other inclusion compounds such as metal-organic frameworks (MOFs). Owing to the enormous variety and flexibility of their frameworks, inclusion compounds may offer superior properties for storage of hydrogen and/or hydrogen-rich molecules, relative to other types of compounds. We have investigated the hydrogen storage properties of two MOFs, Cu3[Co(CN)6] 2 and Cu3(BTC)2 (BTC = benzenetricarboxylate), and our preliminary results demonstrate that the developed neutron-scattering techniques are equally well suited for studying MOFs and other inclusion compounds. © 2007 by The National Academy of Sciences of the USA.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162238
Appears in Collections:气候变化与战略

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作者单位: Zhao, Y., Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, United States; Xu, H., Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, United States, Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States; Daemen, L.L., Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, United States; Lokshin, K., Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, United States, Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, United States; Tait, K.T., Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, United States; Mao, W.L., Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, United States; Luo, J., Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, United States; Currier, R.P., Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States; Hickmott, D.D., Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States

Recommended Citation:
Zhao Y.,Xu H.,Daemen L.L.,et al. High-pressure/low-temperature neutron scattering of gas inclusion compounds: Progress and prospects[J]. Proceedings of the National Academy of Sciences of the United States of America,2007-01-01,104(14)
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