Efficient Proton Transport in Stable Functionalized Channels of Zirconium Metal-Organic Frameworks
Efficient Proton Transport in Stable Functionalized Channels of Zirconium Metal-Organic Frameworks
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锆金属有机框架稳定功能化通道中的高效质子传输
DOI：
10.1021/acsaem.1c01541
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发表时间：
2021-08-13
影响因子：
6.4
通讯作者：
Zeng, Lin
中科院分区：
文献类型：
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作者：
Li, Xiao-Min;Wang, Yameng;Zeng, Lin
探索具有高且持久质子传导性的稳定质子传导材料是人们所期待的，但这仍然是一个挑战。在这里，我们报告了一种修改Zr-金属有机框架（MOF）通道的策略[UiO-66, Zr6O4(OH)(4)(bdc)(6), bdc = 1,4-苯二甲酸/MOF-808, Zr6O4(OH)(4)(BTC)(2)(HCOO)(5)(H2O)(1)(OH)(1), BTC = [苯三甲酸]与离子液体1-(丙基-3-磺酸盐)咪唑鎓硫酸氢盐([(CH2)(3)SO3H-HIM]HSO4)通过无溶剂反应合成稳定的IL@UiO-66和IL@MOF-808，其具有1.42 x 10(-1)和7.01 x的超高质子电导率70 摄氏度和 98% 相对湿度下为 10(-1) S cm(-1)。电导率值与已报道的基于 MOF 的质子导体的最高性能相当。此外，通过明确的晶体结构和质子动力学的联合分析，清楚地阐明了 IL@UiO-66 的质子传导机制。值得注意的是，IL@UiO-66和IL@MOF-808被制成杂化膜，具有高效的质子传输和良好的性能稳定性，为进一步应用奠定了基础。该工作为研究质子传导机制提供了基础，对先进质子传导材料的理解、设计和评估的迭代循环具有促进作用。
Exploring stable proton-conducting materials with high and durable proton conductivity is expected, but it is still a challenge. Here, we report a strategy of modifying the channels of Zr-metal-organic frameworks (MOFs) [UiO-66, Zr6O4(OH)(4)(bdc)(6), bdc = 1,4-benzenedicarboxylate/MOF-808, Zr6O4(OH)(4)(BTC)(2)(HCOO)(5)(H2O)(1)(OH)(1), BTC = benzenetricarboxylate] by an ionic liquid, 1-(propyl-3-sulfonate) imidazolium hydrosulfate, ([(CH2)(3)SO3H-HIM]HSO4), via the free-solvent reaction to synthesize stable IL@UiO-66 and IL@MOF-808, which show ultrahigh proton conductivities of 1.42 x 10(-1) and 7.01 x 10(-1) S cm(-1) at 70 degrees C and 98% relative humidity. The conductivity values are comparable to the highest performance of reported MOF-based proton conductors. Furthermore, the proton conduction mechanism of IL@UiO-66 is clearly clarified by the conjoint analysis of the well-defined crystal structure and proton dynamics. Notably, IL@UiO-66 and IL@MOF-808 are fabricated into hybrid membranes with efficient proton transport and good performance stabilities, which lay the foundation for further application. This work provides a basis for studying the proton conduction mechanism and has a promotion on the iterative cycle of understanding, design, and evaluation of advanced proton-conducting materials.