LiNi0.9Co0.15Al0.05O2 (NCA) material is successfully synthesized with a modified co-precipitation method,in which NH3,H2O and EDTA are used as two chelating agents. The obtained LiNi0.9Co0.15Al0.05O2 materialhas wel...LiNi0.9Co0.15Al0.05O2 (NCA) material is successfully synthesized with a modified co-precipitation method,in which NH3,H2O and EDTA are used as two chelating agents. The obtained LiNi0.9Co0.15Al0.05O2 materialhas well-defined layered structure and uniform element distribution, which reveals an enhanced electro-chemical performance with a capacity retention of 97.9% after 100 cycles at 0.2 C, and reduced thermalrunaway from the isothermal calorimetry test. In situ X-ray diffraction (XRD) was employed to capturethe structural changes during the charge-discharge process. The reversible evolutions of lattice parame-ters (a, b, c, and V) further verify the structural stability.展开更多
novel honeycomb-shaped Pt Sn Na/g-Al2 O3/cordierite monolithic catalyst(Pt 0.5%, Sn 0.9%, Na 1.0%,relative to Al2 O3 weight) was developed and its catalytic performances in propane dehydrogenation were tested and co...novel honeycomb-shaped Pt Sn Na/g-Al2 O3/cordierite monolithic catalyst(Pt 0.5%, Sn 0.9%, Na 1.0%,relative to Al2 O3 weight) was developed and its catalytic performances in propane dehydrogenation were tested and compared with the classical granule catalyst with same Pt, Sn and Na contents under the conditions of 0.1 MPa, 590C, C3 H8/H2 at 3/1(molar ratio) and gas hourly space velocity(GHSV) at155 h-1. Interestingly, despite the generated coke amount and exposed Pt fraction, the honey combshaped structure of monolithic catalyst exerted important influences on its catalytic activities and led to the advanced catalytic performances over the granule catalyst.展开更多
PtSnNa/γ-Al2O3 catalyst is widely used in the dehydrogenation of light alkane. This paper reports a new fabrication method of the catalyst. In the work, γ-Al2O3, SnCl4 and NaCl were ball milled to upload Sn and Na+...PtSnNa/γ-Al2O3 catalyst is widely used in the dehydrogenation of light alkane. This paper reports a new fabrication method of the catalyst. In the work, γ-Al2O3, SnCl4 and NaCl were ball milled to upload Sn and Na+ onto the support instead of the conventionally used immersion method. The subsequent baking procedures frimly fixed Sn onto the support, which could disperse Pt introduced by immersion. The effects of Sn and Na+ additives on the catalytic performance of PtSnNa/y-Al2O3 catalyst were investigated. It was found that the appropriate molar ratio of Sn/Pt was 6:1 while the favorable weight percentage of Na+ was 0.90%. Compared with the reaction catalyzed by the industrially employed PtSnNa/ γ-Al2O3 catalyst, the conversion of propane and the selectivity of propylene had been greatly improved, which were 26.97%; and 99.18% respectivelv after 12 h reaction.展开更多
The key role played by carbon dioxide in global temperature cycles has stimulated constant research attention on carbon capture and storage.Among the various options,lithium-carbon dioxide batteries are intriguing,not...The key role played by carbon dioxide in global temperature cycles has stimulated constant research attention on carbon capture and storage.Among the various options,lithium-carbon dioxide batteries are intriguing,not only for the transformation of waste carbon dioxide to value-added products,but also for the storage of electricity from renewable power resources and balancing the carbon cycle.The development of this system is still in its early stages and faces tremendous hurdles caused by the introduction of carbon dioxide.In this review,detailed discussion on the critical problems faced by the electrode,the interface,and the electrolyte is provided,along with the rational strategies required to address these problematic issues for efficient carbon dioxide fixation and conversion.We hope that this review will provide a resource for a comprehensive understanding of lithium-carbon dioxide batteries and will serve as guidance for exploring reversible and rechargeable alkali metal-based carbon dioxide battery systems in the future.展开更多
基金partially supported by the National Key Research and Development Program of China (2016YFB0100203)the National Natural Science Foundation of China (21673116,21633003)+1 种基金the Natural Science Foundation of Jiangsu Province of China (BK20160068)PAPD of Jiangsu Higher Education Institutions
文摘LiNi0.9Co0.15Al0.05O2 (NCA) material is successfully synthesized with a modified co-precipitation method,in which NH3,H2O and EDTA are used as two chelating agents. The obtained LiNi0.9Co0.15Al0.05O2 materialhas well-defined layered structure and uniform element distribution, which reveals an enhanced electro-chemical performance with a capacity retention of 97.9% after 100 cycles at 0.2 C, and reduced thermalrunaway from the isothermal calorimetry test. In situ X-ray diffraction (XRD) was employed to capturethe structural changes during the charge-discharge process. The reversible evolutions of lattice parame-ters (a, b, c, and V) further verify the structural stability.
基金Jiangsu Planned Projects for Postdoctoral Research Funds (No. 1301080C)Specialized Research Fund for the Doctoral Program of Higher Education (No. SRFDP-2012009111001)+1 种基金Key Science & Technology Specific Projects of Yangzhou (No. YZ20122029)Yangzhou Nature Science Foundation (No. YZ2014040) for financial support
文摘novel honeycomb-shaped Pt Sn Na/g-Al2 O3/cordierite monolithic catalyst(Pt 0.5%, Sn 0.9%, Na 1.0%,relative to Al2 O3 weight) was developed and its catalytic performances in propane dehydrogenation were tested and compared with the classical granule catalyst with same Pt, Sn and Na contents under the conditions of 0.1 MPa, 590C, C3 H8/H2 at 3/1(molar ratio) and gas hourly space velocity(GHSV) at155 h-1. Interestingly, despite the generated coke amount and exposed Pt fraction, the honey combshaped structure of monolithic catalyst exerted important influences on its catalytic activities and led to the advanced catalytic performances over the granule catalyst.
基金the Doctoral Program of Higher Education(No. SRFDP-2012009111001)NNSFC(No. 21202141)+1 种基金Priority Academic Program Development(PAPD) of Jiangsu Higher Education Institutions, Key Science & Technology Specific Projects of Yangzhou(No. YZ20122029)Yangzhou Nature Science Foundation(No. YZ2014040) for financial support
文摘PtSnNa/γ-Al2O3 catalyst is widely used in the dehydrogenation of light alkane. This paper reports a new fabrication method of the catalyst. In the work, γ-Al2O3, SnCl4 and NaCl were ball milled to upload Sn and Na+ onto the support instead of the conventionally used immersion method. The subsequent baking procedures frimly fixed Sn onto the support, which could disperse Pt introduced by immersion. The effects of Sn and Na+ additives on the catalytic performance of PtSnNa/y-Al2O3 catalyst were investigated. It was found that the appropriate molar ratio of Sn/Pt was 6:1 while the favorable weight percentage of Na+ was 0.90%. Compared with the reaction catalyzed by the industrially employed PtSnNa/ γ-Al2O3 catalyst, the conversion of propane and the selectivity of propylene had been greatly improved, which were 26.97%; and 99.18% respectivelv after 12 h reaction.
文摘The key role played by carbon dioxide in global temperature cycles has stimulated constant research attention on carbon capture and storage.Among the various options,lithium-carbon dioxide batteries are intriguing,not only for the transformation of waste carbon dioxide to value-added products,but also for the storage of electricity from renewable power resources and balancing the carbon cycle.The development of this system is still in its early stages and faces tremendous hurdles caused by the introduction of carbon dioxide.In this review,detailed discussion on the critical problems faced by the electrode,the interface,and the electrolyte is provided,along with the rational strategies required to address these problematic issues for efficient carbon dioxide fixation and conversion.We hope that this review will provide a resource for a comprehensive understanding of lithium-carbon dioxide batteries and will serve as guidance for exploring reversible and rechargeable alkali metal-based carbon dioxide battery systems in the future.