Photocatalytic Anaerobic Oxidation of Aromatic Alcohols Coupled With H 2 Production Over CsPbBr 3 /GO-Pt Catalysts
Metal halide perovskites (MHPs) have been widely investigated for various photocatalytic applications. However, the dual-functional reaction system integrated selective organic oxidation with H production over MHPs is rarely reported. Here, we demonstrate for the first time the selective oxidation o...
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Published in | Frontiers in chemistry Vol. 10; p. 833784 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
2022
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Subjects | |
Online Access | Get full text |
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Summary: | Metal halide perovskites (MHPs) have been widely investigated for various photocatalytic applications. However, the dual-functional reaction system integrated selective organic oxidation with H
production over MHPs is rarely reported. Here, we demonstrate for the first time the selective oxidation of aromatic alcohols to aldehydes integrated with hydrogen (H
) evolution over Pt-decorated CsPbBr
. Especially, the functionalization of CsPbBr
with graphene oxide (GO) further improves the photoactivity of the perovskite catalyst. The optimal amount of CsPbBr
/GO-Pt exhibits an H
evolution rate of 1,060 μmol g
h
along with high selectivity (>99%) for benzyl aldehyde generation (1,050 μmol g
h
) under visible light (
> 400 nm), which is about five times higher than the CsPbBr
-Pt sample. The enhanced activity has been ascribed to two effects induced by the introduction of GO: 1) GO displays a structure-directing role, decreasing the particle size of CsPbBr
and 2) GO and Pt act as electron reservoirs, extracting the photogenerated electrons and prohibiting the recombination of the electron-hole pairs. This study opens new avenues to utilize metal halide perovskites as dual-functional photocatalysts to perform selective organic transformations and solar fuel production. |
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ISSN: | 2296-2646 2296-2646 |