Photocatalytic Z-scheme water splitting is considered as a promising approach to produce solar hydrogen.However,the forward hydrogen production reaction is often impeded by backward reactions.In the present study,in a...Photocatalytic Z-scheme water splitting is considered as a promising approach to produce solar hydrogen.However,the forward hydrogen production reaction is often impeded by backward reactions.In the present study,in a photosystem Ⅱ-integrated hybrid Z-scheme water splitting system,the backward hydrogen oxidation reaction was significantly suppressed by loading a PtCrOx cocatalyst on a ZrO2/TaON photocatalyst.Due to the weak chemisorption and activation of molecular hydrogen on PtCrOx,where Pt is stabilized in the oxidized forms,Pt^Ⅱ and Pt^Ⅳ,hydrogen oxidation is inhibited.However,it is remarkably well-catalyzed by the metallic Pt cocatalyst,thereby rapidly consuming the produced hydrogen.This work describes an approach to inhibit the backward reaction in the photosystem Ⅱ-integrated hybrid Z-scheme water splitting system using Fe(CN)6^3-/Fe(CN)6^4-redox couple as an electron shuttle.展开更多
Artificial photosynthetic solar fuels and foodstuffs are an effective and attractive approach for sustaining our society in a green and low‐carbon manner.Although it is a big challenge to develop science and technolo...Artificial photosynthetic solar fuels and foodstuffs are an effective and attractive approach for sustaining our society in a green and low‐carbon manner.Although it is a big challenge to develop science and technology of solar energy conversion,solar fuels including green hydrogen and liquid sunshine such as methanol produced via artificial photosynthesis are an important pathway to reduce the dependence on fossil fuels and the emission of carbon dioxide[1].Artificial photosynthetic systems aim to the efficient conversion of solar energy with water and carbon dioxide into the stable,energy‐dense carriers for chemical industrial supply chains.Furthermore,the advanced foodstuffs,such as biological macromolecules including starch and protein via artificial photosynthesis,will play an important role in animal feed and food industrial feedstock in the future.Therefore,artificial photosynthetic technologies for carbon dioxide conversion and utilization have shed light on the roadmap to move forward to carbon neutrality.展开更多
基金supported by the National Natural Science Foundation of China(32271545 and 31972030)Major Program of Haihe Laboratory of Synthetic Biology(22HHSWSS00016 and 22HHSWSS00003)+2 种基金Tianjin Synthetic Biotechnology Innovation Capacity Improvement Project(TSBICIP-KJGG-008-03 and TSBICIP-PTJJ-007-10)Youth Promotion Association of Chinese Academy of Sciences(CAS)(2021176)CAS Project for Young Scientists in Basic Research(YSBR-072)。
基金supported by the Strategic Priority Research Program of Chinese Academy of Sciences(XDB17000000)the Key Research Program of Frontier Sciences,CAS(QYZDY-SSW-JSC023)+1 种基金the National Natural Science Foundation of China(21603224,31470339)the National Key R&D Program of China(2017YFA0503700)~~
文摘Photocatalytic Z-scheme water splitting is considered as a promising approach to produce solar hydrogen.However,the forward hydrogen production reaction is often impeded by backward reactions.In the present study,in a photosystem Ⅱ-integrated hybrid Z-scheme water splitting system,the backward hydrogen oxidation reaction was significantly suppressed by loading a PtCrOx cocatalyst on a ZrO2/TaON photocatalyst.Due to the weak chemisorption and activation of molecular hydrogen on PtCrOx,where Pt is stabilized in the oxidized forms,Pt^Ⅱ and Pt^Ⅳ,hydrogen oxidation is inhibited.However,it is remarkably well-catalyzed by the metallic Pt cocatalyst,thereby rapidly consuming the produced hydrogen.This work describes an approach to inhibit the backward reaction in the photosystem Ⅱ-integrated hybrid Z-scheme water splitting system using Fe(CN)6^3-/Fe(CN)6^4-redox couple as an electron shuttle.
文摘Artificial photosynthetic solar fuels and foodstuffs are an effective and attractive approach for sustaining our society in a green and low‐carbon manner.Although it is a big challenge to develop science and technology of solar energy conversion,solar fuels including green hydrogen and liquid sunshine such as methanol produced via artificial photosynthesis are an important pathway to reduce the dependence on fossil fuels and the emission of carbon dioxide[1].Artificial photosynthetic systems aim to the efficient conversion of solar energy with water and carbon dioxide into the stable,energy‐dense carriers for chemical industrial supply chains.Furthermore,the advanced foodstuffs,such as biological macromolecules including starch and protein via artificial photosynthesis,will play an important role in animal feed and food industrial feedstock in the future.Therefore,artificial photosynthetic technologies for carbon dioxide conversion and utilization have shed light on the roadmap to move forward to carbon neutrality.
