Combining Dithienosilole-Based Organic Dyes with a Brookite/Platinum Photocatalyst toward Enhanced Visible-Light-Driven Hydrogen Production
| Autor: | Jonathan Filippi, Alessio Dessì, Matteo Bartolini, Paolo Fornasiero, Gianna Reginato, Ottavia Bettucci, Theodosis Skaltsas, Lorenzo Zani, Alessandro Mordini, Massimo Calamante, Adalgisa Sinicropi |
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| Přispěvatelé: | Bettucci, O., Skaltsas, T., Calamante, M., Dessi, A., Bartolini, M., Sinicropi, A., Filippi, J., Reginato, G., Mordini, A., Fornasiero, P., Zani, L., Bettucci, O, Skaltsas, T, Calamante, M, Dessì, A, Bartolini, M, Sinicropi, A, Filippi, J, Reginato, G, Mordini, A, Fornasiero, P, Zani, L |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Hydrogen Energy Engineering and Power Technology chemistry.chemical_element Photochemistry photocatalysi Materials Chemistry Electrochemistry Chemical Engineering (miscellaneous) Electrical and Electronic Engineering organic dyes organic dye Hydrogen production Brookite brookite chemistry dithienosilole visual_art hydrogen Photocatalysis visual_art.visual_art_medium photocatalysis Energy source Platinum Visible spectrum |
| Zdroj: | ACS applied energy materials Online 2 (2019): 5600–5612. doi:10.1021/acsaem.9b00782 info:cnr-pdr/source/autori:Ottavia Bettucci, Theodosis Skaltsas, Massimo Calamante, Alessio Dessì, Matteo Bartolini, Adalgisa Sinicropi, Jonathan Filippi, Gianna Reginato, Alessandro Mordini, Paolo Fornasiero, Lorenzo Zani/titolo:Combining dithienosilole-based organic dyes with a brookite%2FPt photocatalyst towards enhanced visible light-driven hydrogen production/doi:10.1021%2Facsaem.9b00782/rivista:ACS applied energy materials Online/anno:2019/pagina_da:5600/pagina_a:5612/intervallo_pagine:5600–5612/volume:2 |
| Popis: | Dye-sensitized photocatalytic hydrogen generation is emerging as a promising process to produce fuels using a clean and abundant energy source such as sunlight. In the first part of this work, three organic dyes featuring a dithieno[3,2-b:2',3'-d]silole heterocyclic unit (OB1-OB3), bearing different substituents on various parts of the molecular scaffold, were synthesized, characterized, and used as sensitizers for the commercially available benchmark TiO2 (P25), first in dye-sensitized solar cells and then for the photocatalyzed production of hydrogen with triethanolamine as a sacrificial electron donor. In the second part of the study, aiming to improve the efficiency of the photocatalytic system, P25 was replaced with the less investigated brookite TiO2 polymorph. The photocatalyst obtained upon sensitization with the best performing dye, OB2, still in the presence of Pt as co-catalyst, displayed an enhanced performance in hydrogen production compared to that based on P25 at a lower dye loading. Extended time experiments confirmed that the catalyst was still significantly active after 1 week under continuous illumination, providing a maximum TON of 4201. The higher efficiency of the brookite-based catalytic system and its prolonged stability are especially significant in the perspective of the practical application of the dye-sensitized photocatalytic H-2 production technology. |
| Databáze: | OpenAIRE |
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