通过基于viologen的共价有机框架 (vCOFs) 进行氧化离子导电:向进步的方法
Pampa Jhariat1, Anil Kumar U2,3, Arjun Warrier1
1Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India.
ACS applied materials & interfaces
|April 29, 2024
概括
阴离子共价有机框架 (COFs) 促进性燃料电池的高效氧化离子运输. 这项研究证明了一种新型的COF,vTAPA,可以在没有合成后修改的情况下实现直接氧化导电,实现高导电性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 性燃料电池需要高效的氧化离子 (OH-) 运输,但由于其低扩散率和高质量而受到阻碍.
- 在共价有机框架 (COF) 内的有序通道为增强OH导电提供了潜在的解决方案.
研究的目的:
- 为了合成和表征一个为高效的氧化离子导电提供阴离子COF.
- 为了研究COF结构内OH-运输的机制.
- 为了评估COF在性燃料电池应用中的性能.
主要方法:
- 溶热辅助基反应用于vTAPA合成.
- 使用三级氧化引入OH-离子的离子交换.
- 密度函数理论 (DFT) 用于研究离子交换机制.
- 电化学测量以确定OH-离子导电性.
主要成果:
- 合成了vTAPA,一种性COF,在强的基本溶液中具有出色的稳定性.
- 通过COF的1D通道内的离子交换证明了高效的OH导电.
- 在vTAPA框架内,DFT研究证实了有利的OH-相互作用点.
- 在90°C和98%的RH下,Butyl@vTAPA实现了1.05 × 10^-4 S cm^-1的高OH导电性.
结论:
- 阴离子COF可以作为有针对性的氧化离子运输的有效平台.
- 这项工作是首次直接使用COF用于氧化离子导电,而没有合成后的修改.
- 开发的vTAPA框架为推进性燃料电池技术提供了一个有希望的途径.
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