Dye-sensitized photocatalytic H2 generation has been investigated using a metal-free phenothiazine-based donor-acceptor sensitizer (PTZ-GLU) in combination with coadsorbents. The coadsorption of the PTZ-GLU dye, functionalized with a glucose end-group, in combination with a glucose-based coadsorbent, afforded improved photocatalytic activity compared to the absence of coadsorbents, to the use of a conventional (chenodeoxycholic acid) coadsorbent, or by replacing the dye glucose functionality with an alkyl chain. The results suggest the strategic role of directional intermolecular dye-coadsorbent interactions on the semiconductor surface, as confirmed by first principles computational modeling, which likely suppressed detrimental recombination processes.

Manfredi, N., Monai, M., Montini, T., Peri, F., De Angelis, F., Fornasiero, P., et al. (2018). Dye-Sensitized Photocatalytic Hydrogen Generation: Efficiency Enhancement by Organic Photosensitizer-Coadsorbent Intermolecular Interaction. ACS ENERGY LETTERS, 3(1), 85-91 [10.1021/acsenergylett.7b00896].

Dye-Sensitized Photocatalytic Hydrogen Generation: Efficiency Enhancement by Organic Photosensitizer-Coadsorbent Intermolecular Interaction

Manfredi, Norberto;Peri, Francesco;Abbotto, Alessandro
2018

Abstract

Dye-sensitized photocatalytic H2 generation has been investigated using a metal-free phenothiazine-based donor-acceptor sensitizer (PTZ-GLU) in combination with coadsorbents. The coadsorption of the PTZ-GLU dye, functionalized with a glucose end-group, in combination with a glucose-based coadsorbent, afforded improved photocatalytic activity compared to the absence of coadsorbents, to the use of a conventional (chenodeoxycholic acid) coadsorbent, or by replacing the dye glucose functionality with an alkyl chain. The results suggest the strategic role of directional intermolecular dye-coadsorbent interactions on the semiconductor surface, as confirmed by first principles computational modeling, which likely suppressed detrimental recombination processes.
Articolo in rivista - Articolo scientifico
renewable energy, hydrogen, solar energy;
English
2018
3
1
85
91
partially_open
Manfredi, N., Monai, M., Montini, T., Peri, F., De Angelis, F., Fornasiero, P., et al. (2018). Dye-Sensitized Photocatalytic Hydrogen Generation: Efficiency Enhancement by Organic Photosensitizer-Coadsorbent Intermolecular Interaction. ACS ENERGY LETTERS, 3(1), 85-91 [10.1021/acsenergylett.7b00896].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/179905
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