Confining Phosphoric Acid in Quaternized COF Channels for Ultra-Stable and Fast Anhydrous Proton Transport

作     者：Pang, Xiao Shi, Benbing Liu, Yawei Wu, Hong Shen, Jianliang Guan, Jingyuan Wang, Xiaoyao Fan, Chunyang Cao, Li Zhu, Tianhao Kong, Yan Jiang, Zhongyi 

作者机构：Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology Tianjin University Tianjin300072 China Ningbo Key Laboratory of Green Petrochemical Carbon Emission Reduction Technology and Equipment Zhejiang Institute of Tianjin University Zhejiang Ningbo315201 China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City Fuzhou350207 China Haihe Laboratory of Sustainable Chemical Transformations Tianjin300192 China Chinese Acad Sci Beijing Key Lab Ion Liquids Clean Proc CAS Key Lab Green Proc & Engn State Key Lab Multiphase Complex Syst Inst Proc En Beijing100190 China 

出 版 物：《Angewandte Chemie - International Edition》 (Angew. Chem. Int. Ed.)

年 卷 期：2025年第64卷第13期

页      面：e202423458页

核心收录：

学科分类：081704[工学-应用化学] 0817[工学-化学工程与技术] 08[工学] 070203[理学-原子与分子物理] 0703[理学-化学] 0702[理学-物理学] 

基　　金：This work was supported by National Natural Science Foundation of China  grant No. 91934302 (Z.J.)  21961142013 (Z.J.)  China Postdoctoral Science Foundation  grant No. 2023M741817 (B.S) and Program of Introducing Talents of Discipline to Universities  grant No. BP0618007 (Z.J.). The authors gratefully acknowledge the cooperation of the beamline scientists at 1W1A Diffuse Xray Scattering Station  Beijing Synchrotron Radiation Facility (BSRF-1W1A) beamline.This work was supported by National Natural Science Foundation of China  grant No. 91934302 (Z.J.)  21961142013 (Z.J.)  China Postdoctoral Science Foundation  grant No. 2023M741817 (B.S) and Program of Introducing Talents of Discipline to Universities  grant No. BP0618007 (Z.J.). The authors gratefully acknowledge the cooperation of the beamline scientists at 1W1A Diffuse Xray Scattering Station  Beijing Synchrotron Radiation Facility (BSRF\u20101W1A) beamline 

主　　题：Hydrogen bonds 

摘      要：Phosphoric acid (H3PO4) doping is a widely employed strategy to facilitate anhydrous proton transport in high-temperature proton exchange membrane fuel cells (HT-PEMFCs). However, significant H3PO4 leaching during long-term operation poses critical challenges to maintaining membrane stability and proton conductivity. Herein, H3PO4 is incorporated into positively charged nanochannels of quaternized covalent organic framework membranes (QACOFMs), leveraging strong electrostatic interactions and confinement effects to achieve exceptional H3PO4 retention under hydration conditions. Moreover, the shortened hydrogen bond length between H3PO4 (O−H…O 3PO4@QACOFMs facilitate ultra-fast anhydrous proton transport. As a result, the H3PO4@QACOFMs exhibit superior anhydrous proton transport in a broader temperature range (60 °C–200 °C) and the highest proton conductivity reaches about 379.7 mS cm−1 at 200 °C. © 2025 Wiley-VCH GmbH.