Citation: Chong GAO, Tianyun LIU, Zhiyuan XING, Wenjun YANG, Yang PENG. Covalent organic frameworks enhancing CO₂ mass transfer for high-rate CO₂ electroreduction[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(9): 1997-2007. doi: 10.11862/CJIC.20260109 shu

Covalent organic frameworks enhancing CO₂ mass transfer for high-rate CO₂ electroreduction

School of Energy, Soochow University, Institute of Energy and Materials Innovation, Soochow University, Jiangsu Provincial Key Laboratory of Advanced Negative Carbon Technologies, Jiangsu Provincial Key Laboratory of Advanced Carbon Materials and Wearable Technologies, Suzhou, Jiangsu 215006, China

Corresponding author: Wenjun YANG, wjyang@suda.edu.cn Yang PENG, ypeng@suda.edu.cn
Received Date: 2 April 2026
Revised Date: 4 June 2026

Figures(9)

A series of triazine-based covalent organic frameworks with well-defined structures was decorated on the surfaces of Cu₂O catalysts to systematically investigate the effect of the pore microenvironment of porous materials on CO₂ mass-transfer behavior. Experimental results demonstrated that among the series of composite materials, a Cu₂O-loaded fluorine-doped imine covalent triazine framework (Cu₂O/F-Imine-CTF-2.5%) featuring both high hydrophobicity and large pore size exhibited the best performance, achieving a current density corresponding to the maximum Faradaic efficiency for ethylene (FE_max) up to 800 mA·cm^-2, which was twice that of pristine Cu₂O, accompanied by a significantly enhanced partial current density for ethylene. The findings indicate that in aqueous electrolyte environments, the enhancement of mass transfer in porous materials depends not only on their adsorption affinity for CO₂, but also on their ability to repel water molecules via hydrophobicity and to reduce diffusion resistance through large pore channels.
- electrocatalysis,
- porous materials,
- CO₂ mass transfer
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Covalent organic frameworks enhancing CO₂ mass transfer for high-rate CO₂ electroreduction