1. Tuning Thiophene-Based Phenothiazines for Stable Photocatalytic Hydrogen Production.
- Author
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Cecconi B, Manfredi N, Ruffo R, Montini T, Romero-Ocaña I, Fornasiero P, and Abbotto A
- Subjects
- Catalysis, Coloring Agents chemistry, Electrochemistry, Light, Optical Phenomena, Platinum chemistry, Titanium chemistry, Hydrogen chemistry, Phenothiazines chemistry, Photochemical Processes, Thiophenes chemistry
- Abstract
Dibranched donor-(π-acceptor)2 dyes, where phenothiazine is the donor core, cyanoacrylic acid is the acceptor/anchoring group, and π is represented by mono- and poly-cyclic simple and fused thiophene derivatives, were tested as photosensitizers in the photocatalytic production of H2 , in combination with a Pt/TiO2 catalyst. The optical and electrochemical properties of the dyes were investigated, showing that careful design of the thiophene-based π spacer afforded enhanced optical properties. In the H2 production over 20 h, the new thiophene-based sensitizers revealed improved stability after longer irradiation times and enhanced performances, in terms of H2 production rates and light-to-fuel efficiencies, after an initial activation period, which were for the first time associated with enhanced stability under photocatalytic production of H2 and the absence of critical dye degradation., (© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
- Published
- 2015
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