open access

https://hdl.handle.net/2115/95747

Dual-productive photoredox cascade catalyst for solar hydrogen production and methylarene oxidation

英語

2024-07-21

Royal Society of Chemistry

Catalysis science and technology

(14)

3893-3897

Solar H2 production during the transformation of organic compounds is a promising approach to supply both H2 and organic chemicals necessary for a sustainable carbon neutral society. To create such a dual-productive photocatalytic system, we developed a photoredox cascade catalytic (PRCC) system by combining a dual-dye sensitized Pt-TiO2 photocatalyst (DDSP) and an N-hydroxyphthalimide (NHPI) hydrogen atom transfer (HAT) catalyst. DDSP successfully evolved H2 upon blue-light excitation and simultaneously oxidized NHPI to generate phthalimido-N-oxyl radicals (PINO center dot) which produced oxidized methylarenes by the HAT reaction of the benzylic/allylic C-H bond, followed by a radical coupling reaction. The significantly higher activity of DDSP than that of single-dye sensitized analogue (SDSP) suggests that the dual-dye layer acted as an efficent separator to spatially divide the two reaction fields, while separating the electron-hole pairs produced by light absorption with high efficiency. A photoredox cascade catalyst for concurrent organic synthesis and hydrogen production was developed by combining a dual-dye sensitized Pt-TiO2 photocatalyst and an N-hydroxyphthalimide hydrogen atom transfer catalyst.

学術雑誌論文

Accepted Manuscript

2044-4753