Issue 13, 2024

A dual-functional metalloporphyrin-fluorenone covalent organic framework for solar hydrogen and oxygen production

Abstract

Developing efficient dual-functional photocatalysts for the solar-driven conversion of H2O into H2 and O2 is a challenging yet promising approach to achieve carbon-free fuel production. Herein, we present a newly developed covalent organic framework (COF), integrated with cobalt porphyrin (Co-TP) and fluorenone (FO), as an efficient dual-functional photocatalyst. The Co-TPFO-COF exhibits structural advantages in photocatalysis due to its highly crystalline structure with high surface area and porosity. Additionally, the Co-TP unit serves not only as an electron donor enabling intramolecular electron transport to the FO unit for H2 production, but also an oxidation-active moiety for efficient O2 evolution. An O2 yield rate of 2399 μmol g−1 h−1 was achieved with an apparent quantum efficiency of 1.06%, while the H2 production rate reached 1015 μmol g−1 h−1. The performances can be ascribed to the synergy between directional charge transfer, decreased O2 evolution barriers and enhanced H+ adsorption. This study paves the way for the development of dual-functional COF photocatalysts for solar-to-fuel conversion.

Graphical abstract: A dual-functional metalloporphyrin-fluorenone covalent organic framework for solar hydrogen and oxygen production

Supplementary files

Article information

Article type
Communication
Submitted
01 Feb 2024
Accepted
29 Feb 2024
First published
02 Mar 2024

J. Mater. Chem. A, 2024,12, 7515-7521

A dual-functional metalloporphyrin-fluorenone covalent organic framework for solar hydrogen and oxygen production

Z. Xiao, H. Wu, L. Jiao, X. Zhang and Y. Wang, J. Mater. Chem. A, 2024, 12, 7515 DOI: 10.1039/D4TA00759J

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