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

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Visible light-driven simultaneous water oxidation and quinone reduction by a nano-structured conjugated polymer without co-catalysts.
Chemical Science ( IF 7.6 ) Pub Date : 2020-06-12 , DOI: 10.1039/d0sc02122a
Jully Patel ₁ , Xiaojiao Yuan ₂ , Stéphanie Mendes Marinho ₁ , Winfried Leibl ₁ , Hynd Remita ₂ , Ally Aukauloo _{1,

3}

Affiliation

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 H₂O₂ formation was detected, stemming from the partial reduction of O₂.

中文翻译：

通过纳米结构共轭聚合物在可见光驱动下同时进行水氧化和醌还原，无需助催化剂。

在人工光合作用中，化学家的目标是借鉴自然光合作用的原理来开发用于水分解的光电化学电池（PEC）。水质体醌光氧化还原酶，也称为光系统 II，利用光将水进行四电子、四质子氧化成双氧，并以醌的还原形式存储还原当量，最终用于合成的暗反应富含能量的分子。我们报道了一种基于聚二苯基丁二炔（nano-PDPB）的纳米结构半导体共轭聚合物，及其在没有任何牺牲剂或助催化剂的情况下分散在水中时在可见光照射下对水氧化反应的光催化活性。纳米 PDPB 上的电荷直接恢复或延迟恢复通过作为储氢库的醌的还原来例证。在不存在醌作为电子受体的情况下，由于O _{2的部分还原而检测到H}₂ O ₂的形成。

更新日期：2020-07-22

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