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Engineering of Pore Geometry for Ultrahigh Capacity Methane Storage in Mesoporous Metal–Organic Frameworks

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posted on 05.09.2017, 00:00 by Cong-Cong Liang, Zhao-Lin Shi, Chun-Ting He, Jing Tan, Hu-Die Zhou, Hao-Long Zhou, Yongjin Lee, Yue-Biao Zhang
Mesoporous Zn4O­(−COO)6-based metal–organic frameworks (MOFs), including UMCM-1, MOF-205, MUF-7a, and the newly synthesized MOFs, termed ST-1, ST-2, ST-3, and ST-4 (ST = ShanghaiTech University), have been systematically investigated for ultrahigh capacity methane storage. Exceptionally, ST-2 was found to have the highest deliverable capacity of 289 cm3STP/cm3 (567 mg/g) at 298 K and 5–200 bar, which surpasses all previously reported records held by porous materials. We illustrate that the fine-tuned mesoporosity is critical in further improving the deliverable capacities at ultrahigh pressure.