Solar driven CO2 reduction with a molecularly engineered periodic mesoporous organosilica containing cobalt phthalocyanine†
Sunanda
Sain, 
b
Maximilian
Wünschek,
c
Francisco J.
Romero-Salguero,
a
Dolores
Esquivel
*a
and
Souvik
Roy
*b
b
Maximilian
Wünschek,
c
Francisco J.
Romero-Salguero,
a
Dolores
Esquivel
*a
and
Souvik
Roy
*b
Abstract
A molecular cobalt phthalocyanine (CoPc) catalyst has been integrated in an ethylene-bridged periodic mesoporous organosilica (PMO) to fabricate a hybrid material, CoPc-PMO, that catalyses CO2 reduction to CO in a photocatalytic system using [Ru(bpy)3]2+ (bpy = 2,2′-bipyridine) as a photosensitizer and 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole (BIH) as an electron donor. CoPc-PMO displays a Co-based turnover number (TONCO) of >6000 for CO evolution with >70% CO-selectivity after 4 h irradiation with UV-filtered simulated solar light, and a quantum yield of 1.95% at 467 nm towards CO. This system demonstrates a benchmark TONCO for immobilised CoPc-based catalysts towards visible light-driven CO2 reduction.
- This article is part of the themed collection: Nanoscale 2023 Emerging Investigators
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