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One-step constructing advanced N-doped carbon@metal nitride as ultra-stable electrocatalysts via urea plasma under room temperature

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Chinese Chemical Letters 2024年第11期35卷 486-491页

作者： Tao Tang Chen Li Sipu Li Zhong Qiu Tianqi Yang Beirong Ye Shaojun Shi Chunyang Wu Feng Cao Xinhui Xia Minghua Chen Xinqi Liang Xinping He Xin Liu Yongqi Zhang Institute of Fundamental and Frontier Science University of Electronic Science and Technology of ChinaChengdu 611731China Department of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China College of Materials Science&Engineering Zhejiang University of TechnologyHangzhou 310014China School of Chemistry and Materials Engineering Changshu Institute of TechnologyChangshu 215500China State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 611731China Department of Engineering Technology Huzhou CollegeHuzhou 313000China Key Laboratory of Engineering Dielectric and Applications(Ministry of Education) School of Electrical and Electronic EngineeringHarbin University of Science and TechnologyHarbin 150080China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityFuzhou 350116China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China

Highly active transition metal nitrides are desirable for electrocatalytic reactions,but their long-term stability is still unsatisfactory and thus limiting commercial ***,for the first time,we report a unique and universal room-temperature urea plasma method for controllable synthesis of N-doped carbon coated metal(Fe,Co,Ni,etc.)nitrides arrays *** preformed metal oxides arrays can be successfully converted into metal nitrides arrays with preserved nanostructures and a thin layer of N-doped carbon(N-C)via one-step urea ***,as a representative case,N-C@CoN nanowire arrays are illustrated and corresponding formation mechanism by plasma is ***,the designed N-C@Co N catalysts deliver excellent electrocatalytic activity and long-term stability both in oxygen evolution reaction(OER)and urea oxidation reaction(UOR).For OER,a low overpotential(264 mV at 10 mA/cm^(2))and high stability(>50 h at 20 mA/cm^(2))are *** UOR,a current density of100 m A/cm^(2) is achieved at only 1.39 V and maintain over 100 *** calculations reveal that the synergetic coupling effect of CoN and N-C can significantly facilitate the charge-transfer process,optimize adsorbed intermediates binding strength and further greatly decrease the energy *** strategy provides a novel method for fabrication of N-C@metal nitrides as highly active and stable catalysts.

关键词： Urea plasma Metal nitrides Carbon shell Oxygen evolution reaction Urea oxidation reaction

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Advances in cathode materials for Li-O2 batteries

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能源化学 2024年第8期95卷 126-167页

作者： Pengcheng Xing Patrick Sanglier Xikun Zhang Jing Li Yu Li Bao-Lian Su Laboratory of Inorganic Materials Chemistry(CMI) University of Namur61 rue de BruxellesB-5000 NamurBelgium Namur Institute of Structured Matter(NISM) University of Namur61 rue de BruxellesB-5000 NamurBelgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430074HubeiChina Laboratory of Inorganic Materials Chemistry(CMI) University of Namur61 rue de BruxellesB-5000 NamurBelgium Namur Institute of Structured Matter(NISM) University of Namur61 rue de BruxellesB-5000 NamurBelgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430074HubeiChina

Lithium-oxygen(Li-O2)batteries have attracted significant attention due to their ultra-high theoretical energy ***,serious challenges,such as potential lag,low-rate capability,round-trip effi-ciency,and poor cycle stability,greatly limit their practical *** review provides a comprehen-sive account of the development of Li-O2 batteries,elucidates the current discharge/charge mechanism,and highlights both the advantages and bottlenecks of this *** particular,recent research pro-gress on various cathode materials,such as carbon-based materials,noble metals,and non-noble metals,for Li-O2 batteries is deeply reviewed,emphasizing the impact of design strategies,material structures,chemical compositions,and microphysical parameters on oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)kinetics,as well as discharge products and overall battery *** review will also shed light on future research directions for oxygen electrode catalysts and material con-struction to facilitate the development of Li-O2 batteries with maximized electrochemical performance.

关键词： Li-O2 batteries Mechanism Cathode OER ORR

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Ballistic performance of spaced multi-ply soft fabrics: Experimental and numerical investigation

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Defence technology（防务技术） 2024年第4期34卷 143-155页

作者： Zhongwei Zhang Xiaoning Yang Yuan Lin Ziming Xiong Yuhang Xiang Yi Zhou Mingyang Wang State Key Laboratory of Explosion&Impact and Disaster Prevention&Mitigation Army Engineering University of PLANanjing 210007China School of Mechanical Engineering Nanjing University of Science&TechnologyNanjing 210007China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China Postdoctoral Station of Civil Engineering Army Engineering University of PLANanjing 210007China

It has been reported that the ply gap influences the ballistic resistance of spaced multi-ply fabric systems,but its working mechanism was not well-understood. This paper reports the experimental and numerical approaches and results of an investigation on the mechanisms that enable the improved ballistic performance of spaced multi-ply systems. Penetration tests were performed over a range of impact velocities ranging from 200 m/s to 400 m/s. The results confirmed that the ply gap is beneficial to the energy absorption capability of the systems. This is because the front plies tend to absorb more energy when they are not immediately constrained by the rear plies. During a ballistic event, the gap relieves the reflection of the compressive pulse, prolonging the projectile engagement time with the front plies;on the other hand, the rear plies become increasingly less active in dissipating energy as the gap *** the gap is sufficiently widened to avoid any interference between the plies before the failure of the front ply, the responses of the whole system no longer vary. It was also found that the ballistic performance of the spaced systems is influenced by ply thickness, impact velocity, and the stacking order of the ply gap.

关键词： Energy absorption capability Ply gap Ballistic performance The front ply The rear ply

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Deformation and phase transformation behaviors of a high Nb-containing TiAl alloy compressed at intermediate temperatures

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Journal of materials Science & technology 2022年第7期102卷 89-96页

作者： Xu Liu Lin Song Andreas Stark Uwe Lorenz Zhanbing He Junpin Lin Florian Pyczak Tiebang Zhang State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China Institute of Materials Research Helmholtz-Zentrum GeesthachtMax Planck-Str.1Geesthacht 21502Germany State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

In modernβ-solidified TiAl alloys,the decomposition of α_(2) phase is frequently observed during heat treatment or high-temperature deformation of the *** this study,high-temperature deformation and decomposition mechanisms of α_(2) phase in a Ti-45Al-8.5Nb-0.2B-0.2W-0.02Y alloy are *** a sample deformed at 800℃,the precipitation ofβ_(o)(ω_(o))phase is observed within the equiaxed α_(2) *** nucleation ofω_(o) particles within theβ_(o) matrix indicates the α_(2)→β_(o)→ω_(o) *** addition,numerous y phase precipitates form within theβ_(o)(ω)*** α_(2) lamellae decompose into ultrafine( α_(2)+γ)lamellae and coarsened y lamellae via α_(2)→ α_(2)+γand α_(2)→γtransformation,***,theω_(o) phase nucleates within the ultrafine lamellae via α_(2)→ω_(o) ***,in a sample deformed at 1000℃,the nucleation ofβ_(o) particles is sluggish,which is caused by the efficient release of the internal stress via dynamic recrystallization(DRX).These results indicate that complex phase transformations can be introduced by the decomposition of α_(2) phase in TiAl alloys with a high amount ofβ-stabilizing elements.

关键词： TiAl alloys Phase transformation Microstructure Electron microscopy

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Building a Highly Stable Ultrathin Nanoporous Layer Assisted by Glucose for Desalination

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Engineering 2022年第9期16卷 247-255页

作者： Yanqiu Zhang Fan Yang Hongguang Sun Yongping Bai Songwei Li Lu Shao MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage&State Key Laboratory of Urban Water Resource and Environment School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China MOE Key Laboratory of Materials Processing and Molding&National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou UniversityZhengzhou 450002China

Although nanoporous membranes are of great interest in desalination,it is still challenging to construct highly permeable nanoporous membranes with excellent rejections for an efficient desalination *** this work,highly permeable nanoporous membranes were built from renewable resources,assisted by the versatile functions of glucose and dopamine,with coupling reactive groups via interfacial reaction with 1,3,5-benzenetricarbonyl trichloride(TMC).The small molecules(0.66 nm)of glucose,which have high hydrophilicity,can diffuse into the membrane for an effective reaction to ensure structural *** novel ultrathin(~44 nm)nanofiltration(NF)membrane exhibits ultra-high Na_(2)SO_(4)flux and excellent rejection of Na_(2)SO_(4)(66.5 L·m^(-2)·h^(-1),97.3%)and MgSO4(63.0 L·m^(-2)·h^(-1),92.1%)under a pressure of 5 bar(1 bar=10^(5)Pa)which is much superior to the performance of natural-product NF *** membrane demonstrates excellent long-term stability,as well as tremendous acid-base and alkali-base stability and high anti-pollution *** designed membrane materials and architecture open a new door to biopolymer-based separation membranes beyond existing membrane materials.

关键词： Nanoporous membrane Renewable resources Nanofiltration Desalination Glucose

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Recent progress in C-N coupling for electrochemical CO_(2) reduction with inorganic nitrogenous species in aqueous solution

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materials Reports(Energy) 2023年第1期3卷 65-77,I0003页

作者： Shuxia Liu Tanyuan Wang Lior Elbaz Qing Li State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanHubei430074China Department of Chemistry and the Institute of Nanotechnology and Advanced Materials Bar-Ilan UniversityRamat-Gan5290002Israel

The electrocatalytic CO_(2) reduction in aqueous solution mainly involves bond cleavage and formation between C,H and O,and it is highly desirable to expand the bond formation reaction of C with other atoms to obtain novel and valuable *** electrochemical synthesis of N-containing organic chemicals in electrocatalytic CO_(2) reduction via introducing N sources is an effective strategy to expand the product scope,since chemicals con-taining C–N bonds(*** and amines)are important reactants/products for medicine,agriculture and *** article focuses on the research progress of C–N coupling from CO_(2) and inorganic nitrogenous species in aqueous ***,the reaction pathways related to the reaction intermediates for urea,formamide,acetamide,methylamine and ethylamine are ***,the electrocatalytic performance of different catalysts for these several N-containing products are summarized and ***,the challenges and op-portunities are analyzed,aiming to provide general insights into future research directions for electrocatalytic C–N coupling.

关键词： CO_(2) reduction C-N coupling Heterogeneous electrocatalysis Amide Amine

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Defect size evaluation in eddy current testing through wavelet transform and pseudo-color enhancement

Defect size evaluation in eddy current testing through wavel...

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2024 International Workshop on Automation, Control, and Communication Engineering, IWACCE 2024

作者： Dong, Shihao Ou, Zhengyu Xu, Cheng Cen, Jisong Han, Zandong State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Department of Mechanical Engineering Tsinghua University Beijing100084 China Key Laboratory for Advanced Materials Processing Technology Ministry of Education Beijing100084 China

ISBN: (数字)9781510685420

ISBN: (纸本)9781510685413

Eddy current testing (ECT) is a method used to detect defects in conductive materials. The estimation of defect sizes from detected signals plays a crucial role in evaluating product quality and guiding production processes. However, the determination of defect sizes during testing is susceptible to variations in lift-off distances, electrical noise, and often relies on human expertise. This paper evaluates defect sizes using a convolutional neural network regression model based on the impedance signals of defects. First, a through-type eddy current testing system is constructed, resembling those used in industrial production, to obtain high-quality eddy current testing data. Secondly, data are partitioned to locate defect signals, which are then converted into time-frequency matrices using continuous wavelet transform. A pseudo-colour enhancement algorithm is utilized to transform matrices into RGB images and preserve discernibility of defect information. Finally, regression models are constructed to estimate defect sizes. Experimental results demonstrate that this method can accurately evaluate defect sizes with a resolution of 0.05mm, achieving an accuracy of 96.02% with an error margin of ±0.01 mm. For defect sizes ranging from 0.3 mm to 1.0 mm, the mean absolute error in defect estimation is 3.0201×10-3 mm. © 2024 SPIE. All rights reserved.

关键词： Eddy current testing

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One-step solvothermal preparation of Fe-doped Ni_(0.85)Se/NF:An efficient catalyst for the oxygen evolution reaction

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ChemPhysMater 2025年第1期4卷 78-85页

作者： Longqi Zhu Runze Wang Chen Wang Shuhan Yang Haizhen Liu Bo Xing Honghui Cheng Kuikui Wang Institute of Materials for Energy and Environment Laboratory of New Fiber Materials and Modern TextileGrowing Basis for State Key LaboratoryCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004China National Engineering Laboratory of Circular Economy Sichuan University of Science and EngineeringZigong 643000China School of Mechanical Engineering Yangzhou UniversityYangzhou 225127China Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Changzhou UniversityChangzhou 213164China

Metal-cation doping is a fundamental strategy for enhancing catalyst ***-doped Ni_(0.85)Se/NF(Fe-Ni_(0.85)Se/NF)nanoparticles were prepared at 80°C via Fe^(2+)etching *** addition of Fe altered the coordination environment of the Ni species along with the catalyst's morphology,creating additional active ***,the synergistic interaction between the bimetallic components augmented the built-in activity and accelerated reaction *** Fe-Ni_(0.85)Se/NF electrocatalysts demonstrated remarkable catalytic activity for the oxygen evolution reaction(OER),with an acceptable overpotential of 276 mV and a Tafel slope of 58.1 mV dec^(−1)at 100 mA cm^(−2).Moreover,they demonstrated exceptional *** situ Raman and X-ray photoelectron spectroscopy(XPS)analyses showed that the excellent OER performance stemmed from the reconstruction-induced hydroxyl *** study offers a novel approach for streamlining the synthesis procedures and reducing the experimental costs for developing high-efficiency electrocatalysts.

关键词： Doping Selenylation Hydrothermal reaction Oxygen evolution reaction Electrocatalysts

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Garnet-type solid electrolyte:Advances of ionic transport performance and its application in all-solid-state batteries

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Journal of advanced Ceramics 2021年第5期10卷 933-972页

作者： P.M.GONZALEZ PUENTE Shangbin SONG Shiyu CAO Leana Ziwen RANNALTER Ziwen PAN Xing XIANG Qiang SHEN Fei CHEN State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

All-solid-state lithium batteries(ASSLBs),which use solid electrolytes instead of liquid ones,have become a hot research topic due to their high energy and power density,ability to solve battery safety issues,and capabilities to fulfill the increasing demand for energy storage in electric vehicles and smart grid ***-type solid electrolytes have attracted considerable interest as they meet all the properties of an ideal solid electrolyte for *** garnet-type Li_(7)La_(3)Zr_(2)O_(12)(LLZO)has excellent environmental stability;experiments and computational analyses showed that this solid electrolyte has a high lithium(Li)ionic conductivity(10^(-4)-10^(-3) S·cm^(-1)),an electrochemical window as wide as 6 V,stability against Li metal anode,and compatibility with most of the cathode *** this review,we present the fundamentals of garnet-type solid electrolytes,preparation methods,air stability,some strategies for improving the conductivity based on experimental and computational results,interfacial issues,and finally applications and challenges for future developments of LLZO solid electrolytes for ASSLBs.

关键词： Li_(7)La_(3)Zr_(2)O_(12)(LLZO) solid electrolytes lithium ionic conductivity lithium concentration mobility of lithium-ion air stability solid-state batteries

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Hollow CdS-based photocatalysts

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Journal of Materiomics 2021年第3期7卷 419-439页

作者： Xiangyu Liu Mahmoud Sayed Chuanbiao Bie Bei Cheng Biwei Hu Jiaguo Yu Liuyang Zhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology122 Luoshi RoadWuhan430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China Corresponding author.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology122 Luoshi RoadWuhan430070China.

In recent years,photocatalytic technology,driven by solar energy,has been extensively investigated to ease energy crisis and environmental ***,efficiency and stability of photocatalysts are still *** address these issues,design of advanced photocatalysts is *** sulphide(CdS)nanomaterials are one of the promising *** them,hollow-structured CdS,featured with enhanced light absorption ability,large surface area,abundant active sites for redox reactions,and reduced diffusion distance of photogenerated carriers,reveals a broad application ***,main synthetic strategies and formation mechanism of hollow CdS photocatalysts are ***,we comprehensively discuss the current development of hollow-structured CdS nanomaterials in photocatalytic applications,including H2 production,CO2 reduction and pollutant ***,brief conclusions and perspectives on the challenges and future directions for hollow CdS photocatalysts are proposed.

关键词： Hollow sphere CdS photocatalysts Pollutant degradation Hydrogen production CO2 reduction

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