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Boosting Oxygen Evolution Reaction Performance on NiFe‑Based Catalysts Through d‑Orbital Hybridization

Nano-Micro Letters 2025年第1期17卷 281-292页

作者： Xing Wang Wei Pi Sheng Hu Haifeng Bao Na Yao Wei Luo State Key Laboratory of New Textile Materials and Advanced Processing Technology Key Laboratory of New Textile Materials and Applications of Hubei ProvinceSchool of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200People’s Republic of China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072People’s Republic of China

Anion-exchange membrane water electrolyzers(AEMWEs)for green hydrogen production have received intensive attention due to their feasibility of using earth-abundant NiFe-based *** introducing a third metal into NiFe-based catalysts to construct asymmetrical M-NiFe units,the d-orbital and electronic structures can be adjusted,which is an important strategy to achieve sufficient oxygen evolution reaction(OER)performance in ***,the ternary NiFeM(M:La,Mo)catalysts featured with distinct M-NiFe units and varying d-orbitals are reported in this *** and theoretical calculation results reveal that the doping of La leads to optimized hybridization between d orbital in NiFeM and 2p in oxygen,resulting in enhanced adsorption strength of oxygen intermediates,and reduced rate-determining step energy barrier,which is responsible for the enhanced OER *** critically,the obtained NiFeLa catalyst only requires 1.58 V to reach 1 A cm^(−2) in an anion exchange membrane electrolyzer and demonstrates excellent long-term stability of up to 600 h.

关键词： NiFe-based catalysts d-orbital coupling Oxygen evolution reaction Anion exchange membrane electrolyzer

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Effects of TMAH dispersant on rheological behavior of Nd: YAG slurries and optical properties of transparent ceramics 17

Effects of TMAH dispersant on rheological behavior of Nd: YA...

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17th National Conference on Laser technology and Optoelectronics

作者： Luo, Peng Guo, Ruisong Xin, Yu Wang, Yaozhi Zhao, Wenhai Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and Engineering Tianjin University Tianjin300350 China The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430079 China School of Material Science and Engineering Shanghai University Shanghai200444 China

ISBN: (纸本)9781510661097

In this study, transparent Nd: YAG ceramic was fabricated by gel casting of iso bam system using a dispersant composed of tetramethylammonium hydroxide (TMAH) to modify the rheological properties of slurry. The effects of dispersant content on the dispersibility and viscosity of slurry were studied, as well as the microstructure and light transmittance of the obtained transparent ceramics were also analyzed through the introduction of 0 − 1.5 wt.% TMAH. The results showed that the dispersion mechanism of TMAH is mainly to control the electrostatic property and the alkaline Zeta potential value of the slurry. The electrostatic repulsion of ceramic particles in the slurry could be effectively increased through the dispersing action of the additive, thereby reducing the viscosity of the slurry and improving the fluidity of the slurries. Under the TMAH content of 1 wt.%, a high-fluidity and good dispersion of Nd: YAG slurry with a solid load of 78.8 wt.% was obtained. A low viscosity of 72.89 mPa·s was achieved under shearing of 100 s-1, and a dense uniform body was obtained by self-gelling reaction. Highly transparent Nd: YAG ceramics were obtained after vacuum reaction sintering at 1780°C for 10 h, with a transmittance of 75.12% at 1064 nm. In all, the TMAH dispersant could effectively improve the molding properties of PIBM single system gel injection molding transparent ceramics. © 2022 SPIE.

关键词： Optical properties

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Two-dimensional vanadium carbide for simultaneously tailoring the hydrogen sorption thermodynamics and kinetics of magnesium hydride

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Journal of Magnesium and Alloys 2022年第4期10卷 1051-1065页

作者： Chenglin Lu Haizhen Liu Li Xu Hui Luo Shixuan He Xingqing Duan Xiantun Huang Xinhua Wang Zhiqiang Lan Jin Guo Guangxi Novel Battery Materials Research Center of Engineering Technology Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured MaterialsGuangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related TechnologySchool of Physical Science and TechnologyGuangxi UniversityNanning530004China State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute Co.Ltd.Beijing102209China Department of Materials Science and Engineering Baise CollegeBaise533000GuangxiChina Department of Materials Science and Engineering Zhejiang UniversityHangzhou310027China

Magnesium hydride(MgH_(2))is a potential material for solid-state hydrogen ***,the thermodynamic and kinetic properties are far from practical application in the current *** this work,two-dimensional vanadium carbide(V_(2)C)MXene with layer thickness of 50−100 nm was fist synthesized by selectively HF-etching the Al layers from V_(2)AlC MAX phase and then introduced into MgH_(2) to improve the hydrogen sorption performances of MgH_(2).The onset hydrogen desorption temperature of MgH_(2) with V_(2)C addition is significantly reduced from 318℃ for pure MgH_(2) to 190℃,with a 128℃ reduction of the onset *** MgH_(2)+10 wt%V_(2)C composite can release 6.4 wt%of H_(2) within 10 min at 300℃ and does not loss any capacity for up to 10 *** activation energy for the hydrogen desorption reaction of MgH_(2) with V_(2)C addition was calculated to be 112 kJ mol^(−1) H_(2) by Arrhenius’s equation and 87.6 kJ mol^(−1) H_(2) by Kissinger’s *** hydrogen desorption reaction enthalpy of MgH_(2)+10 wt%V_(2)C was estimated by van’t Hoff equation to be 73.6 kJ mol^(−1) H_(2),which is slightly lower than that of the pure MgH_(2)(77.9 kJ mol^(−1) H_(2)).Microstructure studies by XPS,TEM,and SEM showed that V_(2)C acts as an efficient catalyst for the hydrogen desorption reaction of MgH_(2).The first-principles density functional theory(DFT)calculations demonstrated that the bond length of Mg−H can be reduced from 1.71A for pure MgH_(2) to 2.14A for MgH_(2) with V_(2)C addition,which contributes to the destabilization of MgH_(2).This work provides a method to significantly and simultaneously tailor the hydrogen sorption thermodynamics and kinetics of MgH_(2) by two-dimensional MXene materials.

关键词： Hydrogen storage MgH_(2) V_(2)C Catalyst DFT

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Spall Strength and the Study of Damage Mechanism of Pure-Al in Different Wave Systems

SSRN

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SSRN 2025年

作者： Zhang, Yang Sun, Yi Li, Peibo Zhang, Kaichang Zhao, GuiNan Luo, Guoqiang Shen, Qiang Hubei Longzhong Laboratory Hubei Xiangyang441000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Qingdao University of Science and Technology China

To study the structural damage behavior of pure-Al under various shock wave profiles, this paper investigates the target using a light gas gun-driven density gradient material and a homogeneous material. It also conducts structural characterization and failure analysis of the postmortem target. The results indicate that spall strength increases with peak stress. At a strain rate of 103 s−1, the spall strength of the gradient material (approximately 0.502 GPa) is significantly higher than that of the homogeneous material (about 0.157 GPa). This difference is attributed to the temperature softening effect in the homogeneous material. The peak stress of the gradient material impacting pure Al is higher, leading to an increase in small-angle grain boundaries and a phenomenon of grain refinement. Here, the structural damage is primarily influenced by stress effects, resulting in higher spall strength. In contrast, the homogeneous material impacting pure Al exhibits a notable temperature rise, which significantly affects structural damage, making it more susceptible to the formation of pores and cracks, thus resulting in lower spall strength. Furthermore, there are differences in pore morphology under various wave regimes: the pores in the gradient material are elliptical, with the long axis perpendicular to the impact direction, while the pores in the homogeneous material are irregularly shaped. Additionally, the gradient material exhibits multiple spallation surfaces, whereas the homogeneous material shows only one spallation surface. By explaining the damage mechanisms of pure Al under different wave systems, this study aims to provide insights and guidance on the spallation behavior of aluminum matrix composites under complex conditions. © 2025, The Authors. All rights reserved.

关键词： Grain refinement

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Effects of Thermal Aging on Microstructure and Mechanical Properties of Interface of Hot Isostatic Pressing Densified Low Alloy Steel with Inconel 690 Cladding

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稀有金属材料与工程 2025年第4期54卷 879-885页

作者： Yu Lei Cao Rui Ma Jinyuan Yan Yingjie Dong Hao Wang Caiqin State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China Advanced Technology&Materials Co. LtdBeijing 100081China Hebei Hot Isostatic Pressing Technology Innovation Center Zhuozhou 072750China

The microstructure,micro-hardness,and tensile properties of interface between hot isostatic pressing densified low alloy steel and Inconel 690 cladding were investigated during the aging process at 600℃.The results show that the interface region can be divided into four zones from base metal to deposited metal:carbon-depleted zone(CDZ),partial melting zone(PMZ),planar growth zone(PGZ),and brownish feature zone(BFZ).Dimensions of these zones do not significantly change during ***,type I carbides noticeably increase in size in the PMZ,and precipitates clearly occur in the *** main reason for their growth and occurrence is continuous carbon *** highest micro-hardness appears in the PGZ and BFZ regions,which is related to carbon accumulation and precipitates in these *** failure occurs on the base metal side due to the high strength mismatch between these two *** CDZ,composed of only ferrite,has lower strength and fractures at the boundary between CDZ and base *** ultimate tensile strength decreases by only 50 MPa after aging for 1500 h,and the interface region maintains high strength without significant deformation.

关键词： interface thermal aging microstructure mechanical properties hot isostatic pressing densification

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Flexible three-dimensional-networked iron vanadate nanosheet arrays/carbon cloths as high-performance cathodes for magnesium ion batteries

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Science China materials 2022年第8期65卷 2197-2206页

作者： Han Tang Chunli Zuo Fangyu Xiong Cunyuan Pei Shuangshuang Tan Ping Luo Wei Yang Qinyou An Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Hubei Provincial Key Laboratory of Green Materials for Light Industry Collaborative Innovation Center of Green Light-Weight Materials and ProcessingSchool of Materials and Chemical EngineeringHubei University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528200China

Owing to their safety and low cost,magnesium ion batteries(MIBs)have attracted much attention in recent ***,the sluggish diffusion dynamics of magnesium ions hampers the search for appropriate cathode materials with excellent electrochemical ***,we design and synthesize a novel flexible three-dimensional-networked composite of iron vanadate nanosheet arrays/carbon cloths(3 D FeVO/CC)as a binder-free cathode for *** to bare FeVO nanosheets,the 3 D binder-free electrode with designed architecture enables a full range of electrochemical potential,including a high specific capacity of270 mA h g^(-1) and an increased life span(over 5000 cycles).Such achievable high-density energy originates from the synergistic optimization of electron and ion kinetics,while the durability benefits from the robust structure that prevents degradation in *** single-phase reaction mechanism of FeVO in the magnesium ion storage process is also explored by in-situ X-ray diffraction and Raman ***,a flexible MIB pouch cell(3 D FeVO/CCIMgNaTi_(3)O_(7)) is assembled and exhibits practical application *** work verifies that 3 D FeVO/CC is a potential candidate cathode material that can satisfy the requirements of highperformance *** also opens a new avenue to improve the electrochemical performance of cathode materials for MIBs.

关键词： iron vanadate nanosheet arrays flexibility cathode materials magnesium ion batteries

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Polymer “Tape”-Assisted Ball-Milling Method Fabrication Few-Atomic-Layered Bismuth for Improving K^(+)/Na^(+)Storage

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Energy & Environmental materials 2021年第3期4卷 421-427页

作者： Yu Tian Hang Li Shuyan Zhang Haode Zhang Guangze Li Dongqing Liu Yanyuan Qi Zelang Jian Xingke Cai Fujun Li Wen Chen School of Materials Science and Engineering Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China Institute for Advanced Study Shenzhen UniversityShenzhen 518060China College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjing 300071China

Few-layered 2D analogs exhibit new physical/chemical properties,leading to a strong research interest and broad areas of ***,lots of methods(such as ultrasonic and electrochemical methods)have already used to prepared 2D ***,these methods suffer from the drawbacks of low yield,high cost,or precarious state,which limit the largescale *** by the famous Scotch tape method,we develop a ball-milling with polymer"tape"method,fabricating few-atomic-layered material,showing the high-yield,low-cost,and much *** electrode material,ultrathin 2D materials can shorten the ion transfer pathway,contributing to the development of high-power ***,fewatomic-layered structure can expose more active sites to increase their capacity,showing special energy storage *** use the as-prepared few-atomic-layered Bi(FALB)and reduced oxide graphene composites as the anode for potassium/sodium-ion batteries(KIBs/NIBs).The sample achieves a high reversible capacity of 395 m Ah g^(-1)for KIBs,of which FALB contributes 438 m Ah g^(-1)(higher than the theoretical capacity of Bi,386 m Ah g^(-1)),and it carries outstanding cycle and rate performance in KIBs/NIBs.

关键词： energy storage mechanism few-atomic-layered material polymer"tape" potassium/sodium-ion batteries reduced graphene oxide

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Nitrogen‐doped tin oxide electron transport layer for stable perovskite solar cells with efficiency over 23%

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Interdisciplinary materials 2022年第2期1卷 309-315页

作者： Yanping Mo Chao Wang Xuntian Zheng Peng Zhou Jing Li Xinxin Yu Kaizhong Yang Xinyu Deng Hyesung Park Fuzhi Huang Yi‐Bing Cheng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanP.R.China Solar Hydrogen Production Lab Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong LaboratoryFoshanP.R.China International School of Materials Science and Engineering Wuhan University of TechnologyWuhanP.R.China Department of Materials Science and Engineering Graduate School of Semiconductor Materials and Devices EngineeringPerovtronics Research CenterLow Dimensional Carbon Materials CenterUlsan National Institute of Science and TechnologyUlsanRepublic of Korea

Tin oxide has made a major breakthrough in high-efficiency perovskite solar cells(PSCs)as an efficient electron transport layer by the low-temperature chemical bath deposition ***,tin oxide often contains pernicious defects,resulting in unsatisfactory ***,we develop high-quality tin oxide films via a nitrogen-doping strategy for high-efficiency and stable planar *** aligned energy level at the interface of doped SnO_(2)/perovskite,more excellent charge extraction and reduced nonradiative recombination contribute to the enhanced efficiency and ***,the power conversion efficiency of the devices based on N‐SnO_(2) film increases to 23.41% from 20.55% of the devices based on the pristine SnO_(2).The N-SnO_(2) devices show an outstanding stability retaining 97.8% of the initial efficiency after steady-state output at a maximum power point for 600s under standard AM1.5G continuous illumination without encapsulation,while less than 50% efficiency remains for the devices based on pristine SnO_(2).This simple scalable strategy has shown great promise toward highly efficient and stable PSCs.

关键词： electron transport layer N doping perovskite solar cell SnO_(2)

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Dynamics of Ring Dark Solitons and the Following Vortices in Spin-1 Bose–Einstein Condensates

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Chinese Physics Letters 2024年第7期41卷 18-26页

作者：钟毓 Houria Triki 周勤 Research Group of Nonlinear Optical Science and Technology Research Center of Nonlinear ScienceSchool of Mathematical and Physical SciencesWuhan Textile UniversityWuhan 430200China Radiation Physics Laboratory Department of PhysicsFaculty of SciencesBadji Mokhtar UniversityP.O.Box 1223000 AnnabaAlgeria State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China

This work focuses on the evolution behaviors of ring dark solitons(RDSs) and the following vortices after the collapses of RDSs in spin-1 Bose–Einstein condensates. We find that the weighted average of the initial depths of three components determines the number and motion trajectories of vortex dipoles. For the weighted average of the initial depths below the critical depth, two vortex dipoles form and start moving along the horizontal *** the weighted average depth above the critical depth, two or four vortex dipoles form, and all start moving along the vertical axis. For the RDS with weighted average depth at exactly the critical point, four vortex dipoles form, half of the vortex dipoles initiate movement vertically, and the other half initiate movement *** conclusion is applicable to the two-component system studied in earlier research, indicating its universality.

关键词： vortex dipole Einstein

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Achieving High-Strength Porous Tungsten with Wide Porosity Range Via Selective Dissolution W-Ti-Fe Precursor

SSRN

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SSRN 2024年

作者： Jia, Hao Zhang, Jian Ge, Shuai Zhu, Bing Liu, Ruxia Wu, Dongshuang Luo, Guoqiang Shen, Qiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Nanyang Technological University Singapore639798 Singapore

Porous tungsten with wide porosity variation is considered a candidate for high-energy X-ray flash radiography. This work combines tape casting and dealloying to selectively dissolve a W-Ti-Fe precursor, achieving high-strength porous tungsten with a wide porosity range. The PVB exists on the surface of particles in the form of an amorphous carbon film after pyrolysis, providing conditions for the W-Fe-C interface reaction. The porosity of porous tungsten is 50.7~80.4%. The compressive strengths of porous tungsten with porosity of 50.7% and 80.4% are 221.9 MPa and 10.6 MPa, respectively. The dissolution of the Ti located in the ligament can enhance the porosity of porous tungsten. The coating composed of the solid solution formed at the interface of W and Ti during heat treatment and Fe3W3C can enhance the ligament strength. This work provides a theoretical reference for preparing porous tungsten with a wide porosity range and high performance. © 2024, The Authors. All rights reserved.

关键词： Dissolution

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