Construction of dense H-bond acceptors in the channels of covalent organic frameworks for proton conduction

被引：20

作者：

Liu, Sijia ^{[1
,2
]}

Liu, Minghao ^{[1
,3
]}

Li, Xuewen ^{[1
,3
]}

Xu, Qing ^{[1
,3
]}

Sun, Yuhan ^{[2
,4
]}

Zeng, Gaofeng ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Shanghai Adv Res Inst SARI, CAS Key Lab Low Carbon Convers Sci & Engn, Shanghai 201210, Peoples R China

[2] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

[3] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China

[4] ShanghaiTech Univ, Inst Carbon Neutral, Shanghai 201203, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2023年 / 11卷 / 26期

基金：

中国国家自然科学基金; 上海市自然科学基金;

关键词：

PROGRESS; ENERGY;

D O I：

10.1039/d3ta01907a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The design of high-conductivity proton exchange membranes (PEMs) under high-temperature anhydrous conditions is important for fuel cells. Covalent organic frameworks (COFs) are a class of promising templates for proton conduction because their one-dimensional porous channels provide a fast pathway for proton transport. Herein, we have demonstrated two two-dimensional (2D) COFs with different densities of oxygen atoms along the pore walls as a host with H3PO4 loading for proton conduction. The O atoms facilitated the formation of the hydrogen-bond networks along the pores, further facilitating proton transport. The COF (PA@PyTTA-BMTP-COF) with 12 O atoms in each pore showed a proton conductivity of 26.00 mS cm(-1), which was three times that of the COF (PA@PyTTA-DHTA-COF) with four atoms in each pore at 140 degrees C under anhydrous conditions. This work gives us a new platform to design porous channels for ionic conduction.

引用

页码：13965 / 13970

页数：6