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Cationic vacancy enriched NiFe layered double hydroxide with Co doping for ultra-stable ampere-level alkaline water oxidation 认领 引用 被引量：1
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作者 Faiza Meharban Faheem Abbas +7 位作者 Xiaotong Wu Lei Tan Kaiyang Li Haojie Zhang Yongge Wei Chao Lin Miho Yamauchi Xiaopeng Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第3期386-396,共11页
NiFe-layered double hydroxides(NiFe-LDHs)are among the most promising earth-abundant electrocatalysts for the oxygen evolution reaction(OER)in alkaline media.However,their practical application is hindered by intrinsi... NiFe-layered double hydroxides(NiFe-LDHs)are among the most promising earth-abundant electrocatalysts for the oxygen evolution reaction(OER)in alkaline media.However,their practical application is hindered by intrinsic activity limitations and poor stability,primarily due to the asymmetric adsorption of oxygen intermediates.To overcome this,the binding strength must be synergistically tuned to a moderate level to optimize catalytic performance.Here,we engineered NiFeCoCr LDH through Co doping to enhance electrical conductivity and controlled Cr leaching to introduce cationic vacancies for modulating intermediate binding strength in NiFe LDH.X-ray absorption near-edge structure and extended X-ray absorption fine structure analyses reveal that NiFe-LDH with Co doping and Cr vacancies modulates the Ni oxidation state and local coordination environment,leading to a balanced electronic structure and enhanced structural complexity around the Ni sites.Additionally,these vacancies can trap OH-/H2O species,which can serve as a reservoir for OH- transfer,facilitating the rapid formation of OER intermediates and enhancing catalytic performance at high current densities.As a result,VCr-NiFeCo LDH achieves 1.6 A cm-2current density at 1.7 V vs.RHE while maintaining stable operation for over 1000 h at 500 mA cm-2.Density functional theory(DFT)calculations validate the synergistic effects of Co doping and Cr-induced vacancies on intermediate binding energies and improved OER kinetics.Overall,this work presents a rational design strategy to simultaneously enhance the activity and durability of NiFe-based OER catalysts for their application in high-performance alkaline water electrolysis. 展开更多
关键词 Oxygen evolution reaction Cationic vacancy Layered double hydroxides(LDH) Alkaline water electrolysis(AWE) Sacrificial leaching
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Correction:Fault Identification in Renewable Energy Transmission Lines Using Wavelet Packet Decomposition and Voltage Waveform Analysis 认领 引用
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作者 Huajie Zhang Xiaopeng Li +2 位作者 Hanlin Xiao Lifeng Xing Wenyue Zhou 《Energy Engineering》 EI 2026年第8期374-374,共1页
Fault Identification in Renewable Energy Transmission Lines Using Wavelet Packet Decomposition and Voltage Waveform Analysis,vol.123,no.3,pp.20,2026.http://gffzzd3cc09b8251d45dfsq0nxun9w5kpw6cb9.ffgz.tsg.suse.edu.cn/10.32604/ee.2026.071768.Following publication of the... Fault Identification in Renewable Energy Transmission Lines Using Wavelet Packet Decomposition and Voltage Waveform Analysis,vol.123,no.3,pp.20,2026.http://gffzzd3cc09b8251d45dfsq0nxun9w5kpw6cb9.ffgz.tsg.suse.edu.cn/10.32604/ee.2026.071768.Following publication of the article,a request was received to correct the institutional affiliation of the authors.The request was supported by relevant documentation and approved by all authors. 展开更多
关键词 renewable energy transmission lines wavelet packet decomposition correct institutional affiliation transmission lines voltage waveform analysisvol no pp https doiorg ee following renewable energy fault identification
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Fault Identification in Renewable Energy Transmission Lines Using Wavelet Packet Decomposition and Voltage Waveform Analysis 认领 引用
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作者 Huajie Zhang Xiaopeng Li +2 位作者 Hanlin Xiao Lifeng Xing Wenyue Zhou 《Energy Engineering》 EI 2026年第3期434-458,共25页
The integration of a high proportion of renewable energy introduces significant challenges for the adaptability of traditional fault nature identification methods.To address these challenges,this paper presents a nove... The integration of a high proportion of renewable energy introduces significant challenges for the adaptability of traditional fault nature identification methods.To address these challenges,this paper presents a novel fault nature identification method for renewable energy grid-connected interconnection lines,leveraging wavelet packet decomposition and voltage waveform time-frequency morphology comparison algorithms.First,the paper investigates the harmonic injection mechanism during non-full-phase operation following fault isolation in photovoltaic renewable energy systems,and examines the voltage characteristics of faulted phases in renewable energy scenarios.The analysis reveals that substantial differences exist in both the time and frequency domains of phase voltages before and after the extinction of transient faults,whereas permanent faults do not exhibit such variations.Building on this observation,the paper proposes a voltage time-frequency feature extraction method based on wavelet packet decomposition,wherein low-frequency waveform components are selected to characterize fault features.Subsequently,a fault nature identification method is introduced,based on a voltage waveform time-frequency morphology comparison.By employing a windowing technique to quantify waveform differences before and after arc extinction,this method effectively distinguishes between permanent and transient faults and accurately determines the arc extinction time.Finally,a 220 kV renewable energy grid connection line model is developed using PSCAD for verification.The results demonstrate that the proposed method is highly adaptable across various fault locations,transition resistances,and renewable energy control strategies,and can reliably identify fault nature in renewable energy grid connection scenarios. 展开更多
关键词 New energy fault nature identification arc extinguishing time shunt reactors variation mode decomposition port voltage
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High quality 6-inch single-crystalline AlN template for E-mode HEMT power device 认领 引用 被引量：1
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作者 Zhiwen Liang Shangfeng Liu +12 位作者 Ye Yuan Tongxin Lu Xiaopeng Li Zirong Wang Neng Zhang Tai Li Xiangdong Li Qi Wang Shengqiang Zhou Kai Kang Jincheng Zhang Yue Hao Xinqiang Wang 《Journal of Semiconductors》 EI CAS CSCD 2025年第3期96-101,共6页
In the present work,the high uniform 6-inch single-crystalline AlN template is successfully achieved by high temperature annealing technique,which opens up the path towards industrial application in power device.Moreo... In the present work,the high uniform 6-inch single-crystalline AlN template is successfully achieved by high temperature annealing technique,which opens up the path towards industrial application in power device.Moreover,the outstanding crystalline-quality is confirmed by Rutherford backscattering spectrometry(RBS).In accompanied with the results from X-ray diffraction,the RBS results along both[0001]and[1213]reveal that the in-plane lattice is effectively reordered by high temperature annealing.In addition,the constantΦepiangle between[0001]and[1213]at different depths of 31.54°confirms the uniform compressive strain inside the AlN region.Benefitting from the excellent crystalline quality of AlN template,we can epitaxially grow the enhanced-mode high electron mobility transistor(HEMT)with a graded AlGaN buffer as thin as only~300 nm.Such an ultra-thin AlGaN buffer layer results in the wafer-bow as low as 18.1μm in 6-inch wafer scale.The fabricated HEMT devices with 16μm-LGDexhibits a threshold voltage(VTH)of 1.1 V and a high OFF-state breakdown voltage(VBD)over 1400 V.Furthermore,after 200 V high-voltage OFF-state stress,the current collapse is only 13.6%.Therefore,the advantages of both 6-inch size and excellent crystallinity announces the superiority of single-crystalline AlN template in low-cost electrical power applications. 展开更多
关键词 single-crystalline allium nitride template E-mode HEMT
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Stabilization of active ultrathin amorphous ruthenium oxide via constructing electronically interacted heterostructure for acidic water oxidation 认领 引用
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作者 Xiangxiang Pan Huidong Qian +5 位作者 Jiansheng Xu Haifeng Wang Han-Don Um Chao Lin Xiaopeng Li Wei Luo 《Green Energy & Environment》 SCIE EI CAS CSCD 2025年第3期551-559,共9页
Amorphous RuOx(a-RuOx) with disordered atomic arrangement and abundant coordinatively unsaturated Ru sites possesses high intrinsic electrocatalytic activity for oxygen evolution reaction (OER).However,the a-RuO... Amorphous RuOx(a-RuOx) with disordered atomic arrangement and abundant coordinatively unsaturated Ru sites possesses high intrinsic electrocatalytic activity for oxygen evolution reaction (OER).However,the a-RuOxis prone to fast corrosion during OER in strong acid.Here we realized the stabilization of an ultrathin a-RuOxlayer via constructing heterointerface with crystalline a-MnO2nanorods array (MnO2@aRuOx).Benefiting from the strong electronic interfacial interaction,the as-formed MnO2@a-RuOxelectrocatalyst display an ultralow overpotential of 128 mV to reach 10 mA cm-2and stable operation for over 100 h in 0.1 mol L-1HClO4.The assembled proton exchange membrane(PEM) water electrolyzer reach 1 A cm-2at applied cell voltage of 1.71 V.Extensive characterizations indicate the MnO2substrate work as an electron donor pool to prevent the overoxidation of Ru sites and the OER proceeds in adsorbent evolution mechanism process without involving lattice oxygen.Our work provides a promising route to construct robust amorphous phase electrocatalysts. 展开更多
关键词 Amorphous ruthenium oxide Manganese dioxide Oxygen evolution reaction PEM electrolyzer
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Visible light excitation on CuPd/TiN with enhanced chemisorption for catalyzing Heck reaction 认领 引用
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作者 Xuhui Fan Fan Wang +7 位作者 Mengjiao Li Faiza Meharban Yaying Li Yuanyuan Cui Xiaopeng Li Jingsan Xu Qi Xiao Wei Luo 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第1期362-368,共7页
In this work,we developed plasmonic photocatalyst composed of Cu Pd alloy nanoparticles supported on Ti N,the optimized Cu3Pd2/Ti N catalyst shows excellent conversion(>96%)and selectivity(>99%)for Heck re... In this work,we developed plasmonic photocatalyst composed of Cu Pd alloy nanoparticles supported on Ti N,the optimized Cu3Pd2/Ti N catalyst shows excellent conversion(>96%)and selectivity(>99%)for Heck reaction at 50℃ under visible light irradiation.By in-situ spectroscopic investigations,we find that visible light excitation could achieve stable metallic Cu species on the surface of Cu Pd alloy nanoparticles,thereby eliminating the inevitable surface oxides of Cu based catalyst.The in-situ formed metallic Cu species under irradiation take advantage of the strong interactions of Cu with visible light,and manifest in the localized surface plasmon resonances(LSPR)photoexcitation.Visible light excitation could further promote the charge transfer between catalytic Pd component and the support Ti N,resulting in electron-rich Pd sites on Cu Pd/Ti N.Moreover,light excitation on Cu Pd/Ti N generates strong chemisorption of iodobenzene and styrene,favoring the activation of reactants for Heck reaction.DFT calculations suggest that electron-rich Cu Pd sites ideally lower the activation energy barrier for the coupling reaction.This work provides valuable insights for mechanistic understanding of plasmonic photocatalysis. 展开更多
关键词 Photocatalysis CuPd alloy Chemisorption Photocatalytic mechanism LSPR
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Xiaopeng Li’s Quantum AMO Theory Group,Department of Physics,Fudan University 认领 引用
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作者 Xiaopeng Li 《Frontiers of physics》 SCIE CSCD 2022年第3期F0003-F0003,190,共1页
We are a quantum theory group working on quantum simulation and quantum computation.The quantum experiments of our primary interest are about atomic,molecular,and optical systems.We aim at developing theories,algorith... We are a quantum theory group working on quantum simulation and quantum computation.The quantum experiments of our primary interest are about atomic,molecular,and optical systems.We aim at developing theories,algorithms,architectures for programmable quantum simulations,with a particular focus on the schemes accessible to present or near-term quantum technology.One direction we are currently pushing is to exploit the computation power of programmable quantum simulations in resolving computation challenges that arise in both fundamental quantum science and nontrivial applications,including correlated quantum many-body physics,classical optimization,and simulating complex chaotic dynamics.This may revolutionize computational science or even the entire field of computation itself. 展开更多
关键词 computation dynamics quantum
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Surface/interface engineering of noble-metals and transition metal-based compounds for electrocatalytic applications 认领 引用 被引量：6
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作者 Mengmeng Zhang Xiaopeng Li +4 位作者 Jun Zhao Xiaopeng Han Cheng Zhong Wenbin Hu Yida Deng 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2020年第3期221-236,共16页
Surface/interface engineering plays an important role in improving the performance and economizing the cost and usage of electrocatalysts.In recent years,substantial progress has been achieved in designing and develop... Surface/interface engineering plays an important role in improving the performance and economizing the cost and usage of electrocatalysts.In recent years,substantial progress has been achieved in designing and developing highly active electrocatalysts with the deepening understanding of surface and interface enhanced mechanism.In this review,recent development about optimizing the surface and interfacial structure in promoting the electrocatalytic activity of noble-metals and transition metal compounds is presented and the chemical enhancements are also described in detail.The relationship between the surface/interface structures(both atomic and electronic configuration)and the electrochemical behaviors has been discussed.Finally,personal perspectives have been proposed,highlighting the challenges and opportunities for future development in tuning the surface/interface active sites of electrocatalysts.We believe that this timely review will be beneficial to the construction of highly active and durable electrode materials through optimizing surface atomic arrangement and interfacial interaction,which can largely promote the development of next-generation clean energy conversion technologies. 展开更多
关键词 Surface/interface engineering Noble metals Transition metals compounds Electrocatalytic reactions
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A confined micro-reactor with a movable Fe3 O4 core and a mesoporous TiO2 shell for a photocatalytic Fenton-like degradation of bisphenol A 认领 引用 被引量：7
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作者 Pengpeng Qiu Tao Zhao +7 位作者 Xiaohang Zhu Binota Thokchom Jianping Yang Wan Jiang Lianjun Wang Yuchi Fan Xiaopeng Li Wei Luo 《Chinese Chemical Letters》 SCIE CAS CSCD 2021年第4期1456-1461,共6页
Photocatalysis and Fenton process are two primary and promising advanced oxidation processes to degrade organic pollutants.However,the practical applications of single photocatalysis and Fenton process are still limit... Photocatalysis and Fenton process are two primary and promising advanced oxidation processes to degrade organic pollutants.However,the practical applications of single photocatalysis and Fenton process are still limited.Introducing one of them into another to form a combined photocatalytic Fentonlike system has shown great potential but still faces challenges in designing a well-tailored catalyst.Herein,a confined photocatalytic Fenton-like micro-reactor catalyst with a movable Fe3 O4 core and a mesoporous TiO2 shell has been constructed via a successive Stober coating strategy,followed by an ultrasound assisted etching method.The resulting micro-reactor possesses well-defined yolk-shell structures with unifo rm mesopores(~4 nm),a large Brunauer-Emmett-Teller(BET) surface area(~166.7 m2/g),a high pore volume(~0.56 cm3/g) and a strong magnetization(~51 emu/g),as well as tunable reactor sizes(20-90 nm).When evaluated for degrading bisphenol A under solar light in the presence of peroxymo no sulfate,the micro-reactor exhibits a superior catalytic degradation perfo rmance with a high magnetic separation efficiency and an excellent recycle ability.The outstanding performance can be attributed to its unique textual structure,which leads to a great syne rgistic effect from the photocatalytic and Fenton-like process.This study gives an important insight into the design and synthesis of an advanced micro-reactor for a combined advanced oxidation processes(AOPs). 展开更多
关键词 Photocatalytic Fenton-like reaction Yolk-shell Micro-reactor Magnetic Mesoporous
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Dynamic modeling and RBF neural network compensation control for space flexible manipulator with an underactuated hand 认领 引用 被引量：9
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作者 Dongyang SHANG Xiaopeng LI +1 位作者 Meng YIN Fanjie LI 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2024年第3期417-439,共23页
In space operation,flexible manipulators and gripper mechanisms have been widely used because of light weight and flexibility.However,the vibration caused by slender structures in manipulators and the parameter pertur... In space operation,flexible manipulators and gripper mechanisms have been widely used because of light weight and flexibility.However,the vibration caused by slender structures in manipulators and the parameter perturbation caused by the uncertainty derived from grasping mass variation cannot be ignored.The existence of vibration and parameter perturbation makes the rotation control of flexible manipulators difficult,which seriously affects the operation accuracy of manipulators.What’s more,the complex dynamic coupling brings great challenges to the dynamics modeling and vibration analysis.To solve this problem,this paper takes the space flexible manipulator with an underactuated hand(SFMUH)as the research object.The dynamics model considering flexibility,multiple nonlinear elements and disturbance torque is established by the assumed modal method(AMM)and Hamilton’s principle.A dynamic modeling simplification method is proposed by analyzing the nonlinear terms.What’s more,a sliding mode control(SMC)method combined with the radial basis function(RBF)neural network compensation is proposed.Besides,the control law is designed using a saturation function in the control method to weaken the chatter phenomenon.With the help of neural networks to identify the uncertainty composition in the SFMUH,the tracking accuracy is improved.The results of ground control experiments verify the advantages of the control method for vibration suppression of the SFMUH. 展开更多
关键词 Space flexible manipulator RBF neural network Underactuated hand Dynamic models Model simplification
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Carbon nanotubes decorated FeNi/nitrogen-doped carbon composites for lightweight and broadband electromagnetic wave absorption 认领 引用 被引量：7
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作者 Juhua Luo Wenxing Yan +3 位作者 Xiaopeng Li Pengcheng Shu Jie Mei Yafan Shi 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第27期207-217,共11页
Magnetic-dielectric component modulation and heterogeneous interface engineering were considered as an effective strategy for designing lightweight and broadband electromagnetic wave(EMW)absorbors.Herein,a series of c... Magnetic-dielectric component modulation and heterogeneous interface engineering were considered as an effective strategy for designing lightweight and broadband electromagnetic wave(EMW)absorbors.Herein,a series of carbon nanotubes(CNTs)decorated core-shell nitrogen-doped carbon(CNTs/FeNi/NC)composites were successfully fabricated via the carbonization of CNTs/NiFe2O4/PDA precursors obtained by hydrothermal and polymerization method.The EMW absorption(EMWA)properties of CNTs/FeNi/NC composites were explored by varying the CNTs content.When the CNTs content was 15%,the minimum reflection loss(RLmin)value was-51.13 dB at 9.52 GHz and the corresponding effective absorption band-width(EAB)value was 2.96 GHz(8.96-11.12 GHz)at 2.5 mm.Particularly,the maximum EAB value can reach up to 4.64 GHz(12.80-17.44 GHz)at 1.7 mm.The excellent EMW attenuation capability resulted from the enhanced conductive loss,polarization loss,magnetic loss,and improved impedance matching.This work offers a novel reference for designing lightweight and broadband EMWA materials. 展开更多
关键词 Carbon nanotubes Nano-heterogeneous interface engineering Electromagnetic wave absorption Impedance matching
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Enzyme activities and gene expression of starch metabolism provide insights into grape berry development 认领 引用 被引量：5
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作者 Xudong Zhu Chaobo Zhang +3 位作者 Weimin Wu Xiaopeng Li Chuan Zhang Jinggui Fang 《Horticulture Research》 SCIE 2017年第1期277-292,共16页
Grapes are categorized as a non-climacteric type of fruit which its ripening is not associated to important rises in respiration and ethylene synthesis.The starch metabolism shares a certain role in the carbohydrate m... Grapes are categorized as a non-climacteric type of fruit which its ripening is not associated to important rises in respiration and ethylene synthesis.The starch metabolism shares a certain role in the carbohydrate metabolic pathways during grape berry development,and is regarded as an important transient pool in the pathway of sugar accumulation.However,the comprehensive role of starch and its contribution to the quality and flavor of grape berry have not been explored thoroughly.In this study,the expression levels of genes enzyme activities and carbohydrate concentrations related to starch metabolism,were analyzed to understand the molecular mechanism of starch accumulation during grape berry development.The results indicated that starch granules in grape berry were located at the chloroplast in the sub-epidermal tissues,acting as the temporary reserves of photosynthetic products to meet the needs for berry development,and relatively high starch contents could be detected at véraison stage.Moreover,both ADP-glucose pyrophosphorylase(EC 2.7.7.27)and sucrose phosphate synthase(EC 2.3.1.14)involved in starch synthesis displayed elevated gene expression and enzymes activities in the sub-epidermal tissue,whileα-andβ-amylases involved in its degradation were highly transcribed and active in the central flesh,explaining the absence of starch in this last tissue.Change in the gene expression and activities of ADP-glucose pyrophosphorylase,β-amylase and sucrose phosphate synthase revealed that they were regulated by the circadian rhythms in the fruitlets compared with those in the leaves.Both the morphological,enzymological and transcriptional data in this study provide advanced understandings on the function of starch during berry development and ripening that are so important for berry quality.This study will further facilitate our understanding of the sugar metabolism in grape berry as well as in other plant species. 展开更多
关键词 metabolism starch elevated
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Vibration suppression for rotating space slender flexible structures based on novel deformation description and NNSMC controller with hyperbolic tangent function 认领 引用
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作者 Dongyang SHANG Xiaopeng LI +1 位作者 Men YIN Sainan ZHOU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2024年第10期339-364,共26页
Rotating Space Slender Flexible Structures(RSSFS)are extensively utilized in space operations because of their light weight,mobility,and low energy consumption.To realize the accurate space operation of the RSSFS,it i... Rotating Space Slender Flexible Structures(RSSFS)are extensively utilized in space operations because of their light weight,mobility,and low energy consumption.To realize the accurate space operation of the RSSFS,it is necessary to establish a precise mechanical model and develop a control algorithm with high precision.However,with the application of traditional control strategies,the RSSFS often suffers from the chattering phenomenon,which will aggravate structure vibration.In this paper,novel deformation description is put forward to balance modeling accuracy and computational efficiency of the RSSFS,which is better appropriate for real-time control.Besides,the Neural Network Sliding Mode Control(NNSMC)strategy modified by the hyperbolic tangent(tanh)function is put forward to compensate for modeling errors and reduce the chattering phenomenon,thereby improving the trajectory tracking accuracy of the RSSFS.Firstly,a mathematical model for the RSSFS is developed according to the novel deformation description and the vibration theory of flexible structure.Comparison of the deformation accuracy between different models proves that the novel modeling method proposed has high modeling accuracy.Next,the universal approximation property of the Radial Basis Function(RBF)neural network is put forward to determine and compensate for modeling errors,which consist of higher-order modes and the uncertainties of external disturbances.In addition,the tanh function is proposed as the reaching law in the conventional NNSMC strategy to suppress driving torque oscillation.The control law of modified NNSMC strategy and the adaptive law of weight coefficients are developed according to the Lyapunov theorem to guarantee the RSSFS stability.Finally,the simulation and physical experimental tests of the RSSFS with different control strategies are conducted.Experimental results show that the control law according to the novel deformation description and the modified NNSMC strategy can obtain accurate tracking of the rotation and reduce the vibration of the RSSFS simultaneously. 展开更多
关键词 Space slender flexible structure Novel deformation description RBF neural network Vibration suppression Hyperbolic tangent function
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Ternary Anion‑Engineered Rare Earth Crystals for Broadband UV Transparency and Enhanced Second‑Harmonic Generation 认领 引用
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作者 Xiaohui Zhang Ye Tao +12 位作者 Qianshuang Lu Jiarui Tan Chenglong Xu Yingjie Li Yi Chen Jianke Pan Feng Su Tingchao He Haifeng Dong Heng Wang Zhi Chen Xiujun Yu Xiaopeng Li 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2026年第11期1743-1752,共10页
Rare earth(RE)crystals have garnered considerable attention as second‑order nonlinear optical(NLO)materials,owing to highly electropositive nature and large ionic radii of RE cations,which facilitate strong ionic bond... Rare earth(RE)crystals have garnered considerable attention as second‑order nonlinear optical(NLO)materials,owing to highly electropositive nature and large ionic radii of RE cations,which facilitate strong ionic bonding,structural versatility,and enhanced NLO susceptibilities.Despite these intrinsic advantages,achieving simultaneously strong NLO activity and deep‑ultraviolet(deep‑UV)transparency in RE crystals remains a formidable challenge.Herein,we report the rational design and synthesis of a new family of RE crystals enabled by a ternary anion‑engineering strategy,in whichπ‑conjugated carbonate,non‑π‑conjugated sulfate,and lone‑pair‑electron‑containing hydroxyl group are synergistically integrated into a single crystal lattice.The cooperative interplay among these chemically and electronically distinct anions induces a new noncentrosymmetric structural motif,giving rise to exceptional deep‑UV transparency,with an absorption edge below 190 nm,surpassing that of many reported RE NLO crystals constructed via complementary anion engineering.Furthermore,such crystals exhibit a strong second‑harmonic generation response,with an intensity 2.5 times that of Y‑cut quartz at 860 nm,along with a suitable birefringence of 0.023@1064 nm.This work provides a versatile design paradigm for the development of high‑performance RE‑based deep‑UV NLO materials,and underscores the critical role of multi‑anions in tuning structural distortion and optical functionality. 展开更多
关键词 Rare earth crystals Anion‑engineering Deep‑ultraviolet transparency Second‑harmonic generation Nonlinear optics
Low temperature surface oxygen activation in crystalline MnO2 triggered by lattice confined Pd single atoms 认领 引用 被引量：4
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作者 Xuemei Liao Yonghui Zhao +5 位作者 Changwen Liu Xiaopeng Li Yu Sund Kenichi Kato Miho Yamauchi Zheng Jiang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第11期136-144,I0003,共9页
Tuning the coordination environment is the research axis of single atom catalysts (SACs). SACs are commonly stabilized by various defects from support. Here, we report a lattice confined Pd SAC using MnO2 as suppor... Tuning the coordination environment is the research axis of single atom catalysts (SACs). SACs are commonly stabilized by various defects from support. Here, we report a lattice confined Pd SAC using MnO2 as support. Compared with the Pd clusters anchored on the surface, the lattice confined Pd single atoms allows spontaneous exaction of surrounding lattice oxygen at room temperature when employed in CO oxidation. The MnO2 supported Pd SAC exhibited a high turnover frequency of 0.203 s−1 at low reaction temperature, which is higher than that of recently reported Pd SACs. Theoretical calculations also confirmed the confined monatomic Pd activate lattice oxygen with an ultralow energy barrier. Our results illustrate that the unique coordination environment of single atom provided by lattice confinement is promising to boost the activity of SACs. 展开更多
关键词 Single atom catalysts(SACs) Lattice confinement Oxygen activation Manganese oxide nanofiber
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Devitrification-induced an Ultrahigh Strength Al-based Composite Maintaining Ductility 认领 引用
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作者 Dong Kan Xiaopeng Li +2 位作者 Baijun Yang Hongwang Yang Jianqiang Wang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2015年第5期489-492,共4页
A new Al-based composite consisting of submicron-sized α-Al matrix embedded with precipitated intermetallic phases was developed by controlling the devitrification process of an Al-Ni-Y-Co-La amorphous alloy.Such a h... A new Al-based composite consisting of submicron-sized α-Al matrix embedded with precipitated intermetallic phases was developed by controlling the devitrification process of an Al-Ni-Y-Co-La amorphous alloy.Such a homogeneous composite structure presented an ultrahigh strength of about 1.34 GPa and a large compressive plastic strain up to 22%.The unique mechanical properties during compression are mainly attributed to the dislocation slip deformation of ductile a-AI matrix and the shear-induced refinement of strengthening intermetallic phases. 展开更多
关键词 Al-rich metallic glass Devitrification Composite M
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Meningeal melanocytoma in the cerebellopontine angle:A rare case report and review of the literature 认领 引用
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作者 Minhai Dong Qungen Xiao +3 位作者 Jinyang Hu Xiaopeng Li Dongsheng Guo Baofeng Wang 《Oncology and Translational Medicine》 CAS 2021年第1期35-40,共6页
Primary meningeal melanocytoma(MM)in the cerebellopontine angle(CPA)region is an extremely rare neoplasm that originates from the melanocytes in the leptomeninges.These lesions are usually misdiagnosed as they mimic o... Primary meningeal melanocytoma(MM)in the cerebellopontine angle(CPA)region is an extremely rare neoplasm that originates from the melanocytes in the leptomeninges.These lesions are usually misdiagnosed as they mimic other common CPA lesions through their nonspecific presenting symptoms,signs,and radiological characteristics.Here,we report a 47-year-old Chinese female patient who presented with a 1-month history of the right-sided tongue numbness and 1-week history of the right-sided face numbness that had been worsening for 2 days.The tumor,in the right CPA region,showed a slight isointensity on T1-weighted image and mixed signal intensity on T2-weighted image.The clinical presentation,surgical treatment,and pathologic characteristics were determined.The tumor was microsurgically resected and gross-total resection was achieved.The tumor revealed a solid,capsulated,brown-black lesion.Immunohistochemistry showed that the tumor cells were positive for human melanoma black-45(HMB-45),melanoma antigen(MelanA),S100,SOX10,and BRAF,confirming the final diagnosis of meningeal melanocytoma.Ultimately,no signs of radiological local recurrence were observed during the two-year follow-up.Collectively,meningeal melanocytoma is difficult to distinguish from common tumors in the CPA region before operation due to the lack of specificity in imaging and symptoms.Complete surgical resection is the best therapeutic option for this tumor.Although the tumor is commonly considered as a benign lesion,recurrence and metastasis are common,and pathogenesis remains unclear. 展开更多
关键词 meningeal melanocytoma cerebellopontine angle pathology therapy
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Busbar Differential Relaying Method Based on Combined Amplitude and Phase Information of High Frequency Transient Currents 认领 引用
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作者 Xiao Wu Zhengyou He Xiaopeng Li 《Energy and Power Engineering》 2013年第4期1288-1292,共5页
Busbar differential relaying method based on combined amplitude and phase information of high frequency transient currents is put forward in this paper for the speed and reliability problems of busbar protection based... Busbar differential relaying method based on combined amplitude and phase information of high frequency transient currents is put forward in this paper for the speed and reliability problems of busbar protection based on fundamental frequency. Under the analysis of features of bus high frequency differential currents, complex wavelet analysis is used to extract the amplitude and phase features of 1/4 period high frequency differential currents, and amplitude and phase information are used to form the polar coordinates. Bus fault is identified intuitively and precisely according to polar locus differences. This polar coordinates represented busbar differential protection scheme based on high frequency transient signals can not only avoid TA saturation, realizing quick protection, lots of PSCAD/EMTDC simulations also show that this busbar differential protection scheme works well under different fault conditions. 展开更多
关键词 Busbar Protection High Frequency Transient Currents Complex Wavelet Analysis Polar Coordinate
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Hierarchical Chirality Transfer and Reversible Chiroptical Switching in Metallo-Helicoids 认领 引用
19
作者 Feng Su Yinzhi Zhu +11 位作者 Runxu Tang Shunran Zhang Wenjing Zhang Zhengong Meng Weijia Wu Yue Wu Fang Fang Zhi Chen Haifeng Dong Heng Wang Xiujun Yu Xiaopeng Li 《CCS Chemistry》 CSCD 2026年第6期2999-3014,共16页
Helicoidal structures,inherently chiral when adopting a preferred-handed conformation,hold great promise for a variety of applications.However,the rational design and synthesis of helicoidal structures with controlled... Helicoidal structures,inherently chiral when adopting a preferred-handed conformation,hold great promise for a variety of applications.However,the rational design and synthesis of helicoidal structures with controlled handedness at the molecular level remain formidable challenges,which further limit the comprehensive understanding of multiscale chirality transfer within such hierarchical systems.Herein,we incorporated(−)/(+)-pineno-fused 2,2′:6′,2″-terpyridine into polymer backbones,and constructed metallo-helicoids with preferred-handed conformations.Chiroptical studies and direct visualization of the screw-sense of metallo-helicoids elucidate the hierarchical chirality transfer,ranging from chiral center to coordination junction,helicoidal surface,entire helicoidal backbone,assembly of multiple helicoid chains,and ultimately extending to interactions with achiral guests.Moreover,super-helices as several strands of metallo-helicoid chains were reversibly formed by treatingemoving water from the polymer solution,leading to an inverse screw-sense compared with individual metallo-helicoids.Such super-helices are further able to induce the chiroptical activity of achiral dye molecules via intermolecular electrostatic interactions,thereby resulting in a significant enhancement of circularly polarized luminescence.Our study not only enables precise control over the handedness of metallo-helicoids but also serves as an ideal platform for investigating chirality transfer across a wide range of length scales. 展开更多
关键词 metallo-helicoids chirality transfer superhelix chiroptical inversion preferred-handed conformation
Optimization of Processing Technology for Roasted Licorice with Water by Orthogonal Method 认领 引用
20
作者 Yali XU Xiaopeng LI +2 位作者 Liyang HA Zhilong SHI Jian GU 《Medicinal Plant》 2020年第3期43-46,50,共4页
[Objectives]To optimize the processing technology for roasted licorice with water.[Methods]Through the orthogonal experimental design,taking the water added,moistening time,frying temperature and frying time as the fa... [Objectives]To optimize the processing technology for roasted licorice with water.[Methods]Through the orthogonal experimental design,taking the water added,moistening time,frying temperature and frying time as the factors,and the content of glycyrrhizin and glycyrrhizic acid as the evaluation index,the processing technology for roasted licorice with water was optimized.[Results]The best processing technology of licorice was as follows:Pure licorice slices were mixed with water and moistened for 3 h,and then fried at 160℃for 6 min.20 kg of water was added to every 100 kg of licorice.[Conclusions]The best processing technology for roasted licorice with water was established,laying a foundation for the research and application of roasted licorice with water and its preparation. 展开更多
关键词 Roasted licorice with water Orthogonal test Processing technology High performance liquid chromatography
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