Enhancement of hydrogen adsorption by alkali-metal cation doping of metal-organic framework-5

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• 作者：Chun-Lin Chu^a ; ^{jenlen.boy@msa.hinet.net} ; Jiann-Ruey Chen^b ; Tsung-Yu Lee^b
• 关键词：Hydrogen storage ; Metal-organic frameworks ; Metal-organic frameworks-5 (MOF-5) ; Porous materials
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：April, 2012
• 卷：37
• 期：8
• 页码：6721-6726
• 文件大小：821 K

摘要

Over the past decade, metal-organic frameworks (MOFs) have been extensively studied as a novel approach to store hydrogen. The large surface area and volume of micropores that are intrinsic to MOFs make them ideal for gas adsorption. In addition, we chemically reduced MOF-5 by doping it with alkali metals (Li, Na, and K). We found that the H₂ uptake capacity of MOF-5 materials doped with Li, Na, and K exceeded that of a neutral framework by 24%, 68%, and 70%, respectively. Notably, at the same levels of doping, the Li⁺-doped framework exhibited the strongest H₂ binding, and the binding strength decreased sequentially in the order Li⁺聽>聽Na⁺聽>聽K⁺.