Solar driven CO2 reduction with a molecularly engineered periodic mesoporous organosilica containing cobalt phthalocyanine

M Angeles Navarro; Sunanda Sain; Maximilian Wünschek; Christian M Pichler; Francisco J Romero-Salguero; Dolores Esquivel; Souvik Roy

doi:10.1039/d2nr06026d

Solar driven CO₂ reduction with a molecularly engineered periodic mesoporous organosilica containing cobalt phthalocyanine

Nanoscale. 2023 Feb 2;15(5):2114-2121. doi: 10.1039/d2nr06026d.

Authors

M Angeles Navarro^{1

2}, Sunanda Sain², Maximilian Wünschek³, Christian M Pichler^{3

4}, Francisco J Romero-Salguero¹, Dolores Esquivel¹, Souvik Roy²

Affiliations

¹ Departamento de Química Orgánica, Instituto Químico para la Energía y el Medioambiente (IQUEMA), Facultad de Ciencias, Universidad de Córdoba, Campus de Rabanales, 14071 Córdoba, Spain. q12esmem@uco.es.
² School of Chemistry, The University of Lincoln, Green Lane, Lincoln LN6 7TS, UK. sroy@lincoln.ac.uk.
³ Institute of applied Physics, TU Vienna, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria.
⁴ Centre of electrochemical and surface technology, Viktor Kaplan Straße 2, 2700 Wiener Neustadt, Austria.

PMID: 36651536
DOI: 10.1039/d2nr06026d

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 (TON_CO) 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 TON_CO for immobilised CoPc-based catalysts towards visible light-driven CO₂ reduction.