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
Plant ecologists are interested in dissecting the relationships between plants and their abiotic(physicochemical)and biotic environments.Plants assimilate carbon dioxide(CO2)and produce oxygen(O2),which are essential ...Plant ecologists are interested in dissecting the relationships between plants and their abiotic(physicochemical)and biotic environments.Plants assimilate carbon dioxide(CO2)and produce oxygen(O2),which are essential for our lives.Unlike animals,plants are sessile in nature and cannot physically escape predators,and are frequently exposed to changing environments,e.g.the availability of water,temperature,light,CO2,nutrients,herbivore and pathogen,during their life cycles.Plants have evolved highly plastic and resilient strategies to tolerate and withstand the variable environmental dynamics.The environments where plants grow are also reshaped and can influence plant traits,performances and functions.Plants often live in a community and have to share/compete resources with other plants in the community.Therefore,plants together with their surrounding environment control water and biogeochemical cycles at the ecosystem scale providing ecosystem functioning and services to support and transform the earth system.There are diverse ecosystems with many distinct vegetation types in China.How these ecosystems respond and adapt to the changing environments is a main theme of contemporary plant ecology.Scientists in China have made great achievements on the topic in 2020 as evidenced by publications in highly regarded international journals.Here,we comprehensively summarized the major progresses of plant ecology research in 2020.展开更多
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Plant ecologists are interested in dissecting the relationships between plants and their abiotic(physicochemical)and biotic environments.Plants assimilate carbon dioxide(CO2)and produce oxygen(O2),which are essential for our lives.Unlike animals,plants are sessile in nature and cannot physically escape predators,and are frequently exposed to changing environments,e.g.the availability of water,temperature,light,CO2,nutrients,herbivore and pathogen,during their life cycles.Plants have evolved highly plastic and resilient strategies to tolerate and withstand the variable environmental dynamics.The environments where plants grow are also reshaped and can influence plant traits,performances and functions.Plants often live in a community and have to share/compete resources with other plants in the community.Therefore,plants together with their surrounding environment control water and biogeochemical cycles at the ecosystem scale providing ecosystem functioning and services to support and transform the earth system.There are diverse ecosystems with many distinct vegetation types in China.How these ecosystems respond and adapt to the changing environments is a main theme of contemporary plant ecology.Scientists in China have made great achievements on the topic in 2020 as evidenced by publications in highly regarded international journals.Here,we comprehensively summarized the major progresses of plant ecology research in 2020.
