硅烷网络UiO-66-NH 2在水电解中的高性能复合质子交换膜。

IF 9.7 1区 化学 Q1 CHEMISTRY, PHYSICAL
Journal of Colloid and Interface Science Pub Date : 2026-01-01 Epub Date: 2025-08-18 DOI:10.1016/j.jcis.2025.138700
Jingyu Pan, Dezhou Gao, Longhui Li, Enjie Wu, Ling Xiang, Qing Shang, Ming Jiang, Guang Yang, Xupin Zhuang
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引用次数: 0

摘要

金属有机骨架(mof)由于其结构可精确调节和化学功能化的多样性,已被广泛用作质子交换膜(PEMs)高效水电解(PEMWE)的高性能质子导电材料。然而,mof在聚合物基质中的不均匀分布及其有限的质子传输途径仍然是重大挑战。在这项工作中,提出了一种硅烷网络策略来构建硅烷网络的UiO-66-NH₂(Si-UiO-66-NH₂),它不仅可以通过Si-O-Si交联作为空间屏障来抑制自聚集,还可以通过表面极性基团作为质子传导介质来增强质子传输。由此得到的硅烷网络MOF与Nafion基体的界面相容性增强,从而促进了MOF颗粒在聚合物网络中的均匀分散。更令人印象深刻的是,硅烷网络mof丰富的极性官能团重组了膜的亲/疏水微相分离结构,促进了连续、低能垒质子传输通道的形成。得益于这些结构的增强,复合膜表现出优异的性能,包括80°C时15.7%的低溶胀率和高质子电导率(236.4 mS·cm-1)。当应用于水电解槽时,优化后的Si-UiO-66-NH₂@Nafion膜在80°C电流密度为3.0 a·cm-2时显著降低了1.887 V的电池电压,与使用重铸的Nafion相比降低了15.3%。本文介绍了一种有效的离子/填料界面调制策略,以提高等离子体的水电解性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Silane-networked UiO-66-NH₂ enabled high-performance composite proton exchange membrane in water electrolysis.

Metal-organic frameworks (MOFs) have been widely used as high-performance proton-conducting materials of proton exchange membranes (PEMs) for efficient proton exchange membrane water electrolysis (PEMWE) due to their precisely tunable structures and versatile chemical functionalization. However, the poor distribution of MOFs within polymer matrices and their limited proton transport pathways remain substantial challenges. In this work, a silane-networking strategy is proposed to construct silane-networked UiO-66-NH₂ (Si-UiO-66-NH₂), which serves not only as a spatial barrier through Si-O-Si crosslinking to inhibit self-aggregation but also as a proton-conductive mediator via superficial polar groups that enhance proton transport. The resulting silane-networked MOFs exhibit enhanced interfacial compatibility with the Nafion matrix, thereby promoting uniform dispersion of MOF particles throughout the polymer network. More impressively, the abundant polar functional groups of silane-networked MOFs reorganize the hydrophilic/hydrophobic microphase-separated structure of the membrane, facilitating the formation of continuous, low-energy-barrier proton transport channels. Benefitting from these structural enhancements, the composite membranes exhibit excellent performance, including a low swelling ratio of 15.7 % at 80 °C and high proton conductivity (236.4 mS·cm-1). When applied in a water electrolyzer, the optimized Si-UiO-66-NH₂@Nafion membrane results in a significantly reduced cell voltage of 1.887 V at a current density of 3.0 A·cm-2 at 80 °C, representing a 15.3 % decrease compared to the system using recast Nafion. This work introduces an effective ionomer/filler interfacial modulation strategy to improve the water electrolysis performance of PEMs.

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来源期刊
CiteScore
16.10
自引率
7.10%
发文量
2568
审稿时长
2 months
期刊介绍: The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality. Emphasis: The journal emphasizes fundamental scientific innovation within the following categories: A.Colloidal Materials and Nanomaterials B.Soft Colloidal and Self-Assembly Systems C.Adsorption, Catalysis, and Electrochemistry D.Interfacial Processes, Capillarity, and Wetting E.Biomaterials and Nanomedicine F.Energy Conversion and Storage, and Environmental Technologies
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