Issue 14, 2024

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

Abstract

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˙) 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.

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

Supplementary files

Article information

Article type
Paper
Submitted
27 Apr 2024
Accepted
28 May 2024
First published
29 May 2024

Catal. Sci. Technol., 2024,14, 3893-3897

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

A. Kobayashi, Catal. Sci. Technol., 2024, 14, 3893 DOI: 10.1039/D4CY00544A

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