Herein,we report the self-sacrificial template strategy to design mesoporous layered CeVWO_(x)/TiO_(2)catalysts for the selective catalytic reduction of NO by NH_(3)(NH_(3)-SCR).As-fabricated CeVWO_(x)/TiO_(2)catalyst...Herein,we report the self-sacrificial template strategy to design mesoporous layered CeVWO_(x)/TiO_(2)catalysts for the selective catalytic reduction of NO by NH_(3)(NH_(3)-SCR).As-fabricated CeVWO_(x)/TiO_(2)catalysts with unique mesoporous and layered structure were successfully prepared through the synthesis of Ce,Ti-MOFs by solvothermal method,the impregnation of vanadium and tungsten in Ce,Ti-MOFs and high temperature calcination process.As NH_(3)-SCR catalysts,well-designed CeVWO_(x)/TiO_(2)catalysts exhibit excellent SCR activity with the NO_(x)conversion of over 90%between 210 and 470℃.Meanwhile,CeVWO_(x)/TiO_(2)shows superior tolerance to water vapor and SO_(2).The features of unique mesoporous layered nanostructure,surface acidity,tunable reducibility,active and the strong interaction of active metal oxide and support in CeVWO_(x)/TiO_(2)nanosheets should contribute to the improved SCR performance.In situ diffuse reflection infrared Fourier transform spectroscopy(DRIFTS)analysis indicates that both Langmuir-Hinshelwood(L-H)and Eley-Rideal(E-R)mechanisms are present on the surface of CeVWO_(x)/TiO_(2)at low temperature.This work offers a facile strategy to design and fabricate efficient 2D deNO_x catalyst.展开更多
Elymus sibiricus L.,a member of the Triticeae tribe,is a grass widely used for forage and restoring degraded grasslands in the Qinghai-Tibetan Plateau(QTP)region.Here,we present a high-quality reference genome assembl...Elymus sibiricus L.,a member of the Triticeae tribe,is a grass widely used for forage and restoring degraded grasslands in the Qinghai-Tibetan Plateau(QTP)region.Here,we present a high-quality reference genome assembly of allotetraploid E.sibiricus,consisting of 14 pseudochromosomes.Our findings suggest that large-scale bursts of retrotransposon activity,especially by Gypsy elements and unclassified retrotransposon elements,have played a critical role in the genome expansion of E.sibiricus as compared with other Triticeae.We identified a translocation between chromosomes Es4H and Es6H with a low recombination rate.Population genomic analysis of 90 E.sibiricus accessions and 25 diploid accessions of proposed ancestors from different habitats revealed four distinct groups,although they are of monophyletic origin.Our population analysis supports the idea that the QTP is likely the center of origin and genetic diversity of E.sibiricus.Selective sweep analysis identified significant pathways related to photosynthesis and metabolism,which are likely associated with the multiple environmental adaptations of this species to the climatic conditions of the QTP.Collectively,our study not only provides genomic resources for genetic improvement of the Elymus genus,but also provides important insights on the evolutionary history of E.sibiricus from population genomic analysis and the evolution of the tribe Triticeae.展开更多
基金Project supported by National Key Research and Development Plan of China(2021YFB3802003,2022YFB3504102)the Key Research and Development Plan of Jiangsu Province(Social Development,BE2021713)+1 种基金the Six Talent Peaks Project of Jiangsu Province(JNHB-044)the Natural Science Foundation of Jiangsu Province of China(BK20160982)。
文摘Herein,we report the self-sacrificial template strategy to design mesoporous layered CeVWO_(x)/TiO_(2)catalysts for the selective catalytic reduction of NO by NH_(3)(NH_(3)-SCR).As-fabricated CeVWO_(x)/TiO_(2)catalysts with unique mesoporous and layered structure were successfully prepared through the synthesis of Ce,Ti-MOFs by solvothermal method,the impregnation of vanadium and tungsten in Ce,Ti-MOFs and high temperature calcination process.As NH_(3)-SCR catalysts,well-designed CeVWO_(x)/TiO_(2)catalysts exhibit excellent SCR activity with the NO_(x)conversion of over 90%between 210 and 470℃.Meanwhile,CeVWO_(x)/TiO_(2)shows superior tolerance to water vapor and SO_(2).The features of unique mesoporous layered nanostructure,surface acidity,tunable reducibility,active and the strong interaction of active metal oxide and support in CeVWO_(x)/TiO_(2)nanosheets should contribute to the improved SCR performance.In situ diffuse reflection infrared Fourier transform spectroscopy(DRIFTS)analysis indicates that both Langmuir-Hinshelwood(L-H)and Eley-Rideal(E-R)mechanisms are present on the surface of CeVWO_(x)/TiO_(2)at low temperature.This work offers a facile strategy to design and fabricate efficient 2D deNO_x catalyst.
基金supported by the Key Research and Development Program of Sichuan Province(2019YFN0170)the National Natural Science Foundation of China(31872995)the Study on the Breeding Project of the Sichuan Provincial Department of Science and Technology(2021YFYZ0013)。
文摘Elymus sibiricus L.,a member of the Triticeae tribe,is a grass widely used for forage and restoring degraded grasslands in the Qinghai-Tibetan Plateau(QTP)region.Here,we present a high-quality reference genome assembly of allotetraploid E.sibiricus,consisting of 14 pseudochromosomes.Our findings suggest that large-scale bursts of retrotransposon activity,especially by Gypsy elements and unclassified retrotransposon elements,have played a critical role in the genome expansion of E.sibiricus as compared with other Triticeae.We identified a translocation between chromosomes Es4H and Es6H with a low recombination rate.Population genomic analysis of 90 E.sibiricus accessions and 25 diploid accessions of proposed ancestors from different habitats revealed four distinct groups,although they are of monophyletic origin.Our population analysis supports the idea that the QTP is likely the center of origin and genetic diversity of E.sibiricus.Selective sweep analysis identified significant pathways related to photosynthesis and metabolism,which are likely associated with the multiple environmental adaptations of this species to the climatic conditions of the QTP.Collectively,our study not only provides genomic resources for genetic improvement of the Elymus genus,but also provides important insights on the evolutionary history of E.sibiricus from population genomic analysis and the evolution of the tribe Triticeae.
