Chen Zhijie, Mian Mohammad Rasel, Lee Seung-Joon, Chen Haoyuan, Zhang Xuan, Kirlikovali Kent O, Shulda Sarah, Melix Patrick, Rosen Andrew S, Parilla Philip A, Gennett Thomas, Snurr Randall Q, Islamoglu Timur, Yildirim Taner, Farha Omar K
Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.
Department of Chemical & Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.
J Am Chem Soc. 2021 Nov 17;143(45):18838-18843. doi: 10.1021/jacs.1c08749. Epub 2021 Nov 9.
The development of adsorbents with molecular precision offers a promising strategy to enhance storage of hydrogen and methane─considered the fuel of the future and a transitional fuel, respectively─and to realize a carbon-neutral energy cycle. Herein we employ a postsynthetic modification strategy on a robust metal-organic framework (MOF), MFU-4l, to boost its storage capacity toward these clean energy gases. MFU-4l-Li displays one of the best volumetric deliverable hydrogen capacities of 50.2 g L under combined temperature and pressure swing conditions (77 K/100 bar → 160 K/5 bar) while maintaining a moderately high gravimetric capacity of 9.4 wt %. Moreover, MFU-4l-Li demonstrates impressive methane storage performance with a 5-100 bar usable capacity of 251 cm (STP) cm (0.38 g g) and 220 cm (STP) cm (0.30 g g) at 270 and 296 K, respectively. Notably, these hydrogen and methane storage capacities are significantly improved compared to those of its isoreticular analogue, MFU-4l, and place MFU-4l-Li among the best MOF-based materials for this application.
开发具有分子精度的吸附剂为提高氢气和甲烷的存储量提供了一种很有前景的策略，氢气和甲烷分别被视为未来的燃料和过渡燃料，并且有助于实现碳中性的能量循环。在此，我们采用后合成修饰策略对一种坚固的金属有机框架（MOF）MFU-4l进行处理，以提高其对这些清洁能源气体的存储能力。在变温变压条件下（77K/100bar → 160K/5bar），MFU-4l-Li展现出50.2 g/L的最佳体积可释放氢气容量之一，同时保持9.4 wt%的适度高重量容量。此外，MFU-4l-Li在270K和296K下分别展示出令人印象深刻的甲烷存储性能，5至100bar的可用容量分别为251 cm³(STP)/cm³（0.38 g/g）和220 cm³(STP)/cm³（0.30 g/g）。值得注意的是，与同构类似物MFU-4l相比，这些氢气和甲烷存储容量有显著提高，使MFU-4l-Li跻身于该应用领域中最佳的基于MOF的材料之列。
