Oxygen-tolerant CO₂ electroreduction over covalent organic frameworks via photoswitching control oxygen passivation strategy.

ABSTRACT: The direct use of flue gas for the electrochemical CO₂ reduction reaction is desirable but severely limited by the thermodynamically favorable oxygen reduction reaction. Herein, a photonicswitching unit 1,2-Bis(5'-formyl-2'-methylthien-3'-yl)cyclopentene (DAE) is integrated into a cobalt porphyrin-based covalent organic framework for highly efficient CO₂ electrocatalysis under aerobic environment. The DAE moiety in the material can reversibly modulate the O₂ activation capacity and electronic conductivity by the framework ring-closing/opening reactions under UV/Vis irradiation. The DAE-based covalent organic framework with ring-closing type shows a high CO Faradaic efficiency of 90.5% with CO partial current density of -20.1 mA cm^-2 at -1.0 V vs.

SUBMITTER: Zhu HJ 

PROVIDER: S-EPMC10874412 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature