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Article Dans Une Revue Chemical Science Année : 2020

Visible light-driven simultaneous water oxidation and quinone reduction by a nano-structured conjugated polymer without co-catalysts

Résumé

In artificial photosynthesis, chemists are aiming to borrow principles from natural photosynthesis to develop photoelectrochemical cells (PEC) for water splitting. The water plastoquinone photo-oxidoreductase enzyme, also known as photosystem II, uses light to perform the four-electron, four-proton oxidation of water to dioxygen and stores reducing equivalents in reduced forms of quinones which are ultimately used in dark reactions for the synthesis of energy-rich molecules. We report a nano-structured semiconducting conjugated polymer based on poly(diphenylbutadiyne) (nano-PDPB) and its photocatalytic activities towards the water oxidation reaction under visible light irradiation when dispersed in water in the absence of any sacrificial agents or co-catalysts. Charge recovery at the nano-PDPB directly or delayed in time was exemplified by the reduction of quinone acting as a hydrogen reservoir. In the absence of quinones as electron acceptors H(2)O(2)formation was detected, stemming from the partial reduction of O-2.

Dates et versions

hal-02928179 , version 1 (02-09-2020)

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Jully Patel, Xiaojiao Yuan, Stephanie Mendes Marinho, Winfried Leibl, Hynd Remita, et al.. Visible light-driven simultaneous water oxidation and quinone reduction by a nano-structured conjugated polymer without co-catalysts. Chemical Science, 2020, 11 (28), pp.7324--7328. ⟨10.1039/d0sc02122a⟩. ⟨hal-02928179⟩
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