Effect of Missing-Linker Defects and Ion Exchange on Stability and Proton Conduction of a Sulfonated Layered Zr-MOF,ACS Applied Materials & Interfaces

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Effect of Missing-Linker Defects and Ion Exchange on Stability and Proton Conduction of a Sulfonated Layered Zr-MOF
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-06-02 , DOI: 10.1021/acsami.3c03873
Monika Szufla _{1,

2} , Jorge A R Navarro ₃ , Kinga Góra-Marek ₁ , Dariusz Matoga ₁

Affiliation

Intentionally introduced defects into solid materials create opportunities to control and tune their diverse physicochemical properties. Despite the growing interest in defect-engineered metal–organic frameworks (MOFs), there are still only a handful of studies on defective proton-conducting MOFs, including no reports on two-dimensional ones. Ion-conducting materials are fundamentally of great importance to the development of energy storage and conversion devices, including fuel cells and batteries. In this work, we demonstrate the introduction of missing-linker defects into a sulfonated proton conductive 2D zirconium-based MOF (JUK-14), using a facile post-synthetic approach and compare the stability and performance of the resulting materials, including proton conductivity, as well as adsorption of N₂, CO₂, and H₂O molecules. We also discuss the associated presence of interlayer counterions and their effect on the properties and stability. Our approach to defect engineering can be extended to other layered MOFs and used for tuning their activity.

中文翻译：

缺失接头缺陷和离子交换对磺化层状 Zr-MOF 稳定性和质子传导的影响

故意在固体材料中引入缺陷创造了控制和调整其不同物理化学性质的机会。尽管对缺陷工程金属有机骨架 (MOF) 的兴趣日益浓厚，但对缺陷质子传导 MOF 的研究仍然很少，包括没有关于二维 MOF 的报道。离子导电材料对于能量存储和转换设备（包括燃料电池和蓄电池）的开发具有根本性的重要意义。在这项工作中，我们展示了在磺化质子导电二维锆基 MOF ( JUK-14 ) 中引入缺失接头缺陷，使用简便的后合成方法，并比较所得材料的稳定性和性能，包括质子导电性, 以及 N 的吸附₂、CO ₂和 H ₂ O 分子。我们还讨论了层间抗衡离子的相关存在及其对性能和稳定性的影响。我们的缺陷工程方法可以扩展到其他分层 MOF 并用于调整它们的活动。

更新日期：2023-06-02

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