Photocatalytic hydrogen evolution from FeMoS-based biomimetic chalcogels
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Ημερομηνία
Συγγραφείς
Yuhas, B. D.
Smeigh, A. L.
Douvalis, A. P.
Wasielewski, M. R.
Kanatzidis, M. G.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
J Am Chem Soc
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
The naturally abundant elements used to catalyze photochemical processes in biology have inspired many research efforts into artificial analogues capable of proton reduction or water oxidation under solar illumination. Most biomimetic systems are isolated molecular units, lacking the protective encapsulation afforded by a protein's tertiary structure. As such, advances in biomimetic catalysis must also be driven by the controlled integration of molecular catalysts into larger superstructures. Here, we present porous chalcogenide framework materials that contain biomimetic catalyst groups immobilized in a chalcogenide network. The chalcogels are formed via metathesis reaction between the clusters [Mo 2Fe 6S 8(SPh) 3Cl 6] 3- and [Sn 2S 6] 4- in solution, yielding an extended, porous framework structure with strong optical absorption, high surface area (up to 150 m 2/g), and excellent aqueous stability. Using [Ru(bpy) 3] 2+ as the light-harvesting antenna, the chalcogels are capable of photocatalytically producing hydrogen from mixed aqueous solutions and are stable under constant illumination over a period of at least 3 weeks. We also present improved hydrogen yields in the context of the energy landscape of the chalcogels. © 2012 American Chemical Society.
Περιγραφή
Λέξεις-κλειδιά
Aqueous stability, Biomimetic catalysis, Biomimetic catalysts, Biomimetic systems, Energy landscape, Framework structures, High surface area, Hydrogen yields, Light-harvesting antennas, Metathesis reactions, Molecular catalysts, Molecular units, Photocatalytic hydrogen evolution, Photochemical process, Protective encapsulation, Proton reduction, Research efforts, Ru(bpy), Solar illumination, Tertiary structures, Water oxidation, Chlorine compounds, Hydrogen, Hydrogen production, Phase change memory, Tin, Biomimetics, biomimetic material, chalcogen, porous polymer, absorption, article, catalyst, controlled study, hydrogen evolution, illumination, photocatalysis, Catalysis, Iron, Microscopy, Electron, Scanning, Molecular Structure, Molybdenum, Oxidation-Reduction, Photochemical Processes, Porosity, Water
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Παραπομπή
Σύνδεσμος
http://www.scopus.com/inward/record.url?eid=2-s2.0-84863455104&partnerID=40&md5=af1f66c3ab4951dc3a3947d779390c6d
Γλώσσα
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών