Visible-light-driven photocatalytic CO2 reduction to formate over a zirconium-porphyrin metal–organic framework with shp-a topology. (8th August 2022)

• Record Type: Journal Article
• Authors: Chen, Dashu; Guo, Zhifen; Li, Bin; Xing, Hongzhu
• Is Part Of: New journal of chemistry. Volume 46:Number 34(2022)
• Page Start: 16297
• Page End: 16302
• Publication Date: 2022-08-08
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj03580d
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Visible-light-driven photocatalytic CO2 reduction to formate over a zirconium-porphyrin metal–organic framework with shp-a topology. Abstract : In this study, a zirconium-porphyrin MOF (PCN-223) was synthesized, characterized and applied in the visible-light-driven photocatalytic CO2 reduction. Drawing support from a highly conjugated 4-connected TCPP ligand and 12-connected zirconium based metal units, PCN-223 with shp-a topology exhibited an open-framework, good chemical stability, ligand-based broad light-absorption and fast photocurrent response (TCPP = tetrakis(4-carboxyphenyl)porphyrin). When used as a catalyst upon visible light irradiation, PCN-223 presented high efficiency for CO2 reduction to formate with an average formate formation rate of 65.2 μmol h −1 gMOF −1, which is higher than those of most reported Zr/Ti-MOFs under similar conditions. Photocatalytic experiments, Mott–Schottky measurements, electron paramagnetic resonance and photoluminescence tests demonstrated that dual catalytic routes exist in PCN-223 where the TCPP ligand and Zr–O clusters can both serve as catalytic centers for CO2 reduction to formate. This study suggested that the combination of the porphyrin-based ligand and zirconium based metal clusters is an effective strategy for constructing MOF photocatalysts for CO2 reduction.