Iron-Complex-Based Supramolecular Framework Catalyst for Visible-Light-Driven CO2 Reduction

Kento Kosugi; Chiharu Akatsuka; Hikaru Iwami; Mio Kondo; Shigeyuki Masaoka

doi:10.1021/jacs.3c00783

Iron-Complex-Based Supramolecular Framework Catalyst for Visible-Light-Driven CO₂ Reduction

J Am Chem Soc. 2023 May 17;145(19):10451-10457. doi: 10.1021/jacs.3c00783. Epub 2023 Apr 6.

Authors

Kento Kosugi¹, Chiharu Akatsuka¹, Hikaru Iwami¹, Mio Kondo^{1

2

3}, Shigeyuki Masaoka^{1

2}

Affiliations

¹ Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
² Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan.
³ PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan.

PMID: 37023530
DOI: 10.1021/jacs.3c00783

Abstract

Molecule-based heterogeneous photocatalysts without noble metals are one of the most attractive systems for visible-light-driven CO₂ reduction. However, reports on this class of photocatalysts are still limited, and their activities are quite low compared to those containing noble metals. Herein, we report an iron-complex-based heterogeneous photocatalyst for CO₂ reduction with high activity. The key to our success is the use of a supramolecular framework composed of iron porphyrin complexes bearing pyrene moieties at meso positions. The catalyst exhibited high activity for CO₂ reduction under visible-light irradiation (29100 μmol g^-1 h^-1 for CO production, selectivity 99.9%), which is the highest among relevant systems. The performance of this catalyst is also excellent in terms of apparent quantum yield for CO production (0.298% at 400 nm) and stability (up to 96 h). This study provides a facile strategy to create a highly active, selective, and stable photocatalyst for CO₂ reduction without utilizing noble metals.