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Article

Molecular Dye-Sensitized Photocatalysis with Metal-Organic Framework and Metal Oxide Colloids for Fuel Production

Chair of Inorganic and Metal-Organic Chemistry, Department of Chemistry, Technical University of Munich, 85748 Garching, Germany
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Author to whom correspondence should be addressed.
Academic Editor: Umberto Desideri
Energies 2021, 14(14), 4260; https://doi.org/10.3390/en14144260
Received: 8 June 2021 / Revised: 6 July 2021 / Accepted: 9 July 2021 / Published: 14 July 2021
(This article belongs to the Special Issue Advances in Molecular Artificial Photosynthesis)
Colloidal dye-sensitized photocatalysis is a promising route toward efficient solar fuel production by merging properties of catalysis, support, light absorption, and electron mediation in one. Metal-organic frameworks (MOFs) are host materials with modular building principles allowing scaffold property tailoring. Herein, we combine these two fields and compare porous Zr-based MOFs UiO-66-NH2(Zr) and UiO-66(Zr) to monoclinic ZrO2 as model colloid hosts with co-immobilized molecular carbon dioxide reduction photocatalyst fac-ReBr(CO)3(4,4′-dcbpy) (dcbpy = dicarboxy-2,2′-bipyridine) and photosensitizer Ru(bpy)2(5,5′-dcbpy)Cl2 (bpy = 2,2′-bipyridine). These host-guest systems demonstrate selective CO2-to-CO reduction in acetonitrile in presence of an electron donor under visible light irradiation, with turnover numbers (TONs) increasing from ZrO2, to UiO-66, and to UiO-66-NH2 in turn. This is attributed to MOF hosts facilitating electron hopping and enhanced CO2 uptake due to their innate porosity. Both of these phenomena are pronounced for UiO-66-NH2(Zr), yielding TONs of 450 which are 2.5 times higher than under MOF-free homogeneous conditions, highlighting synergistic effects between supramolecular photosystem components in dye-sensitized MOFs. View Full-Text
Keywords: dye-sensitized; metal-organic frameworks; metal oxides; host-guest photosystems; molecular catalysis; fuel production; artificial photosystems dye-sensitized; metal-organic frameworks; metal oxides; host-guest photosystems; molecular catalysis; fuel production; artificial photosystems
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MDPI and ACS Style

Stanley, P.M.; Warnan, J. Molecular Dye-Sensitized Photocatalysis with Metal-Organic Framework and Metal Oxide Colloids for Fuel Production. Energies 2021, 14, 4260. https://doi.org/10.3390/en14144260

AMA Style

Stanley PM, Warnan J. Molecular Dye-Sensitized Photocatalysis with Metal-Organic Framework and Metal Oxide Colloids for Fuel Production. Energies. 2021; 14(14):4260. https://doi.org/10.3390/en14144260

Chicago/Turabian Style

Stanley, Philip M., and Julien Warnan. 2021. "Molecular Dye-Sensitized Photocatalysis with Metal-Organic Framework and Metal Oxide Colloids for Fuel Production" Energies 14, no. 14: 4260. https://doi.org/10.3390/en14144260

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