Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Dual Porphyrin Sensitized Photocatalytic System for Visible-Light-Driven CO2 Reduction
Δημιουργός/Συγγραφέας:	Katsari, Anna Nikoloudakis, Emmanouil [EL] Χαραλαμπίδης, Γεώργιος[EN] Charalambidis, Georgios Iliakis, Antonios Odobel, Fabrice Stratakis, Emmanuel
Ημερομηνία:	2026-10-14
Γλώσσα:	Αγγλικά
ISSN:	1864-5631 1864-564X
DOI:	10.1002/cssc.71128
Άλλο:	42837434
Περίληψη:	Dye-sensitized photocatalysis offers a powerful strategy for combining the molecular selectivity of transition-metal catalysts with the robustness and charge-separation capabilities of semiconductor materials. Herein, we report a dual porphyrin-sensitized TiO2 platform for visible-light-driven CO2 reduction, integrating a Zn-porphyrin photosensitizer with newly designed Fe-porphyrin catalysts bearing urea-based secondary-sphere functionalities. These hydrogen-bonding motifs promote CO2 preorganization and stabilization of key reduced intermediates at the metal center. Systematic comparison of homogeneous and heterogeneous systems reveals a pronounced enhancement in activity and durability upon immobilization onto TiO2 nanoparticles. Optimization studies demonstrate that catalytic activity is strongly governed by both sacrificial electron donor (SED) availability and proton concentration. Under anhydrous conditions, increased SED concentration boosts turnover numbers, while the introduction of controlled amounts of water enhances proton-coupled electron transfer but ultimately compromises catalyst stability at higher concentrations. Under optimized conditions, the best-performing assembly achieves turnover numbers (TONs) exceeding 15,000 after 96 h of irradiation, representing, to the best of our knowledge, the highest reported TON for Fe-porphyrin-based dye-sensitized photocatalytic systems (DSPs). These findings highlight the delicate balance between electron and proton management in dye-sensitized architectures and provide key design principles for developing durable and efficient molecular-semiconductor hybrids for solar-driven CO2 conversion.
Τίτλος πηγής δημοσίευσης:	ChemSusChem
Τόμος/Κεφάλαιο:	19
Τεύχος:	19
Θεματική Κατηγορία:	[EL] Φωτοχημεία[EN] Photochemistry [EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	CO2 photoreduction TiO2 nanoparticles dual sensitization dye‐sensitized photocatalysis iron porphyrin catalysts
Χρηματοδότης:	European Union Bodossaki Foundation
Χρηματοδοτικό πρόγραμμα:	Horizon Europe research and innovation programme
Αναγνωριστικό χρηματοδοτικού προγράμματος:	101120397
Κάτοχος πνευματικών δικαιωμάτων:	© 2026 The Author(s). ChemSusChem published by Wiley‐VCH GmbH.
Όροι και προϋποθέσεις δικαιωμάτων:	This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1002/cssc.71128
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο