The prototype material,Li_(1.23)Ru_(0.41)Ni_(0.36)O_(2),is proposed to gain the deep and comprehensive understanding of chemical and structural changes of the novel layered/rocksalt intergrown cathodes.Synchrotronbase...The prototype material,Li_(1.23)Ru_(0.41)Ni_(0.36)O_(2),is proposed to gain the deep and comprehensive understanding of chemical and structural changes of the novel layered/rocksalt intergrown cathodes.Synchrotronbased X-ray absorption spectra and resonant inelastic X-ray scattering reveal that both cationic and anionic redox evolves in the charge compensation process of the intergrown material,while synchrotronbased extended X-ray fine structure spectra and in situ X-ray diffraction measurements demonstrates that the intergrown material undergoes minimal local-and long-range structural variations at deep de/lithiation.This work highlights the great potential of the intergrown structure to inspire the design of advanced cathode materials for lithium-ion batteries.展开更多
Interface engineering can improve the charge separation efficiency and inhibit photocorrosion is an emerging direction of developing more efficient and cost-effective photocatalytic systems.Herein,we report the sulfur...Interface engineering can improve the charge separation efficiency and inhibit photocorrosion is an emerging direction of developing more efficient and cost-effective photocatalytic systems.Herein,we report the sulfur-confined intimate Cd S intergrown Cd(Cd S/Cd)Ohmic junction(peanut-chocolate-ball like)for high-efficient H2production with superior anti-photocorrosion ability,which was fabricated from in-situ photoreduction of CdS intergrown Cd2SO4(OH)2(CdS/Cd2SO4(OH)2)prepared through a facile space-controlled-solvothermal method.The ratios of CdS/Cd can be effectively controlled by tunning that of CdS/Cd2SO4(OH)2which were prepared by adjusting the volume of reaction liquid and the remaining space of the reactor.Experiments investigations and density functional theory(DFT)calculations reveal that the Cd S intergrown Cd Ohmic junction interfaces(with appropriate content Cd intergrown on Cd S(19.54 wt%))are beneficial in facilitating the transfer of photogenerated electrons by constructing an interfacial electric field and forming sulfur-confined structures for preventing the positive holes(h+)oxidize the Cd S.This contributes to a high photocatalytic H2production activity of 95.40μmol h-1(about 32.3 times higher than bare Cd S)and possesses outstanding photocatalytic stability over 205 h,much longer than most Cd S-based photocatalysts previously reported.The interface engineering design inspired by the structure of peanut-chocolate-ball can greatly promote the future development of catalytic systems for wider application.展开更多
Hierarchical porous zeolites attract great at- tention because of their porosity on different scales to improve molecular diffusion. Here, we report mesoporous Faujasite （FAU） zeolite nanosheets with intergrown stru...Hierarchical porous zeolites attract great at- tention because of their porosity on different scales to improve molecular diffusion. Here, we report mesoporous Faujasite （FAU） zeolite nanosheets with intergrown structure synthe- sized in an additive-free system. The sample was composed of uniform nanosheets with a slice thickness of -50 nm, which held a honeycomb-like structure with abundant mesopores. This material exhibits both microporous and mesoporous structure： the intrinsic micropores with a diameter about 0.74 nm in the zeolite framework and the mesopores with a diameter about 10 nm existing within the zeolite nanosheets. The Si/AI ratios can be adjusted from I.I to 1.9 （zeolites X or Y）. In addition, this simple and environment-friendly method may provide inspiration to the synthesis of other hierarchical zeolites.展开更多
基金sponsored by National Natural Science Foundation of China(No.22109010)National Key R&D Program of China(No.2021YFC2902905)+4 种基金Beijing Nova Program,Chongqing Outstanding Youth Fund(No.2022NSCQ-JQX3895)Chongqing Talents Plan for Young Talents(No.CQYC202005032)The Key Project of Chongqing Technology Innovation and Application Development(No.2022TIAD-DEX0024)the support from Beijing Institute of Technology Research Fund Program for Young Scholarsthe support by the Shanghai Sailing Program(No.2023×0308–103–01)。
文摘The prototype material,Li_(1.23)Ru_(0.41)Ni_(0.36)O_(2),is proposed to gain the deep and comprehensive understanding of chemical and structural changes of the novel layered/rocksalt intergrown cathodes.Synchrotronbased X-ray absorption spectra and resonant inelastic X-ray scattering reveal that both cationic and anionic redox evolves in the charge compensation process of the intergrown material,while synchrotronbased extended X-ray fine structure spectra and in situ X-ray diffraction measurements demonstrates that the intergrown material undergoes minimal local-and long-range structural variations at deep de/lithiation.This work highlights the great potential of the intergrown structure to inspire the design of advanced cathode materials for lithium-ion batteries.
基金supported by the National Natural Science Foundation of China(22162008,22162007)the Science and Technology Supporting Project of Guizhou Province([2022]208,[2021]480)the Basic Research Program of Science&Technology Department of Guizhou Province([2020]1Y055)。
文摘Interface engineering can improve the charge separation efficiency and inhibit photocorrosion is an emerging direction of developing more efficient and cost-effective photocatalytic systems.Herein,we report the sulfur-confined intimate Cd S intergrown Cd(Cd S/Cd)Ohmic junction(peanut-chocolate-ball like)for high-efficient H2production with superior anti-photocorrosion ability,which was fabricated from in-situ photoreduction of CdS intergrown Cd2SO4(OH)2(CdS/Cd2SO4(OH)2)prepared through a facile space-controlled-solvothermal method.The ratios of CdS/Cd can be effectively controlled by tunning that of CdS/Cd2SO4(OH)2which were prepared by adjusting the volume of reaction liquid and the remaining space of the reactor.Experiments investigations and density functional theory(DFT)calculations reveal that the Cd S intergrown Cd Ohmic junction interfaces(with appropriate content Cd intergrown on Cd S(19.54 wt%))are beneficial in facilitating the transfer of photogenerated electrons by constructing an interfacial electric field and forming sulfur-confined structures for preventing the positive holes(h+)oxidize the Cd S.This contributes to a high photocatalytic H2production activity of 95.40μmol h-1(about 32.3 times higher than bare Cd S)and possesses outstanding photocatalytic stability over 205 h,much longer than most Cd S-based photocatalysts previously reported.The interface engineering design inspired by the structure of peanut-chocolate-ball can greatly promote the future development of catalytic systems for wider application.
基金supported by the National Natural Science Foundation of China(21533002 and 21571128)the National Excellent Doctoral Dissertation of China(201454)
文摘Hierarchical porous zeolites attract great at- tention because of their porosity on different scales to improve molecular diffusion. Here, we report mesoporous Faujasite （FAU） zeolite nanosheets with intergrown structure synthe- sized in an additive-free system. The sample was composed of uniform nanosheets with a slice thickness of -50 nm, which held a honeycomb-like structure with abundant mesopores. This material exhibits both microporous and mesoporous structure： the intrinsic micropores with a diameter about 0.74 nm in the zeolite framework and the mesopores with a diameter about 10 nm existing within the zeolite nanosheets. The Si/AI ratios can be adjusted from I.I to 1.9 （zeolites X or Y）. In addition, this simple and environment-friendly method may provide inspiration to the synthesis of other hierarchical zeolites.
