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Facile synthesis of hybridized Co/Fe-ZIF under solvent-free conditions for efficient oxidation evolution reaction electrocatalysis

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Nano Research 2025年第1期18卷 362-372页

作者： YinSheng Xu Zihan Li Zhonghan Cheng Somboon Chaemchuen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Chemical Engineering Faculty of EngineeringMahidol UniversityNakhon Pathom 73170Thailand State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

Developing non-noble catalyst synthesis under green conditions with efficient electrochemical reactions is a challenging task in green energy *** meet this challenge,the synthesis of hybridized non-noble cobalt and iron in the zeolitic-imidazole framework(Co/Fe-ZIF)through a solid-state thermal(SST)method is *** the obtained Co/Fe-ZIF structure,iron atoms are uniformly dispersed and randomly hybridized with primary cobalt atoms and imidazole linker,similar to the structure of *** hybridized Co/Fe-ZIF shows potential as an electrocatalyst for oxidation evolution reaction(OER).The optimal iron-incorporating catalyst,Co/Fe_(0.2)-ZIF,demonstrates remarkable performance with a minimized overpotential of 285 mV at the current density(j)of 10 mA·cm^(-2)in 1 M *** synergistic effect of iron and cobalt ions on the catalyst provides active sites that bind to intermediate(OOH^(*))more strongly and facilitate high electron charge transfer,enhancing efficient ***,the synergistic Co/Fe_(0.2-)ZIF catalyst demonstrates excellent durable reaction time compared to non-iron catalyst(ZIF-67)and conventional catalyst(RuO_(2)).

关键词： zeolitic-imidazole frameworks solid-state thermal method solvent-free synthesis electrocatalyst oxidation evolution reaction

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Regulation of solvation structure and electrochemical performance optimization in Zn(NH_(2)SO_(3))_(2)-based electrolytes

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Journal of Energy Chemistry 2025年第5期104卷 644-654页

作者： Lei Liu Ruxue Yan Songyan Jiang Xiao Liu Zhonghua Zhang Xiaosong Guo Xingguang Liu Jun Zheng Guicun Li College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Anhui University of TechnologyMa’anshan 243002AnhuiChina

Monovalent anions,with relatively low charge density,exhibit weak bond energy with Zn^(2+)ions,which facilitates the solubility of Zn salts and the regulation of solvation *** this study,zinc bis(aminosulfate)(Zn(NH_(2)SO_(3))_(2))with a monovalent anion,NH_(2)SO_(3)^(-),was synthesized and dissolved in different ratios of dimethyl sulfoxide(DMSO)and H_(2)O as electrolytes for Zn-ion batteries(ZIBs).From the perspective of game theory,the influences of DMSO and H_(2)O on the solvation structure and electrochemical performance of the Zn(NH_(2)SO_(3))_(2)based electrolytes has been meticulously *** and spectra analysis indicate that DMSO molecules are reluctant to penetrate the primary solvation structure of Zn^(2+)***,increasing DMSO in electrolytes can induce a transition from solvent-separated ion pairs(SSIP)to contact ion pairs(CIP),resulting in an enrichment of anions in the primary solvation *** alteration can significantly suppress parasitic reactions,enhance nucleation density,and refine the deposition morphology during the Zn plating process,leading to superior cyclic stability and high coulombic efficiency(CE)of Zn//Cu and Zn//Zn ***,the enrichment of anions in the primary solvation structure also inhibits the activity of Zn^(2+)ions,amplifies the polarization effect,and engenders a sluggish ionization dynamics,resulting in the low energy conversion efficiency of the *** findings underscore the influence of the anion ratio within the primary solvation structure on electrochemical properties of electrolytes for ZIBs,which may be a pivotal determinant in the Zn deposition process.

关键词： Monovalent anion Primary solvation structure Impressed current cathodic protection Game theory CIP

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The effect of room temperature magnetic field on photoluminescence of Mn:CsPbBr_(3) quantum dots prepared by one-pot method in air

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Nano Research 2025年第4期18卷 561-568页

作者： Mengwei Chen Chenguang Shen Wei Huang Yingping Yang Jie Shen Department of Physics School of Physics and MechanicsWuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China

The generation and manipulation of spin-polarized electrons at room temperature are essential for the development of advanced spin-optoelectronic *** this work,a one-pot method was used to successfully synthesize homogenous Mn:CsPbBr_(3) perovskite quantum dots in air with particle sizes of 7−8 *** effects of Mn doping on the structure,optical and magnetic properties of CsPbBr_(3) quantum dots were *** findings demonstrated proper Mn doping improved the crystallinity and photoluminescence(PL)of quantum *** prepared quantum dots have a narrow full width at half maximum emission(FWHM)of about 17−20 *** magnetic properties of the doped samples and the effect of the magnetic field on the PL spectra properties were *** results show that trace Mn doping can improve the room-temperature ferromagnetism of CsPbBr_(3) quantum *** with magnetic elements makes CsPbBr_(3) quantum dots more responsive to the applied magnetic *** at a lower 50 mT magnetic field,the PL peak of Mn:CsPbBr_(3) still declined 5.91%.Mn:CsPbBr_(3) quantum dots are a new type of multifunctional material that is beneficial to spintronics *** work demonstrates a low-cost synthesis *** should make all-inorganic perovskite quantum dots a promising material for room-temperature spin optoelectronic devices.

关键词： CsPbBr_(3)quantum dots Mn doping one-pot method ferromagnetism magnetic field

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Effect of Free-End Torsion on the Corrosion and Mechanical Properties for Mg-3Zn-0.2Ca Alloy

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Acta Metallurgica Sinica(English Letters) 2025年第1期38卷 59-70页

作者： Li-Lan Gao Jiang Ma Yan-Song Tan Xiao-Hao Sun Qi-Jun Gao De-Bao Liu Chun-Qiu Zhang Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical EngineeringTianjin University of TechnologyTianjin300384China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of TechnologyTianjin300384China School of Materials Science and Engineering Tianjin University of TechnologyTianjin300384China

Magnesium alloys with excellent degradability and biocompatibility are promising materials for biomedical implants,saving patients the burden of second ***,their mechanical properties and corrosion resistance are significantly below the requirements for implant *** study aims to improve the mechanical and corrosion resistance properties of Mg-3Zn-0.2Ca alloy by pre-torsion treatment,and find out the optimal shear *** rod-shaped Mg-3Zn-0.2Ca alloy specimens were pre-torsion treated at different torsion *** effect of free-end torsion on Mg-3Zn-0.2Ca alloy was characterized through microstructure analysis,mechanical testing,and corrosion ***-torsion treatment can refine grain and induce twins and dislocations in Mg-3Zn-0.2Ca *** surface hardness increases with the increase in torsion *** yield strength and ultimate strength initially increase and then decrease with increasing torsion angle,while ductility decreases with increasing torsion *** with a shear strain of 30%exhibit the highest tensile strength,reaching 284.78±10.62 MPa,with an elongation of 19.37±1.66%.Furthermore,they show a significant improvement in fatigue lives both before and after *** the stress amplitude is 120 MPa,the fatigue lives for specimens without pre-torsion treatment are 54,275 cycles and 4324 cycles before and after pre-corrosion,while they increased significantly to 92,015 cycles and 5050 cycles with the 30%shear strain,***,the 30%shear strain specimens show a significant reduction in corrosion *** conclusion,pre-torsion treatment can effectively modify the microstructure of Mg-3Zn-0.2Ca alloy,enhancing both mechanical properties and corrosion *** optimal shear strain for this improvement is 30%.This study provides a practical method to enhance the mechanical properties and corrosion resistance of Mg-3Zn-0.2Ca alloy,making it more suitable for biomedical implan

关键词： Magnesium alloy Pre-torsion Microstructure Mechanical property Corrosion resistance

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Sequential phosphorization and carbonization with modulated d-p orbital interactions in cobalt phosphides for enhanced polysulfide redox kinetics

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Journal of Energy Chemistry 2025年第3期102卷 576-585页

作者： Chenshan Lv Zhi Zheng Liangtao Yang Hailiang Cao Peng Li Yanqin Miao Wei Deng Yuan Chen Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationCollege of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024ShanxiChina School of Chemical and Biomolecular Engineering The University of SydneyDarlingtonNew South Wales 2006Australia Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055GuangdongChina School of Science RMIT UniversityMelbourneVictoria 3000Australia

Cobalt phosphides are potential catalysts to assist the conversion of lithium polysulfides(LiPSs)in lithium-sulfur(Li-S)***,existing synthesis methods have difficulty precisely tuning their band valences,which is crucial to balancing intermediate products'adsorption and conversion abilities in Li-S ***,studies on the relationship between their band structures and electrochemical performance are ***,we report cobalt phosphides(Co_(x)P)with a heterogeneous interface of CoP/Co2P embedded in hollow carbon nanofibers(denoted as Co_(x)P@HCNF)via a one-step sequential phosphorization and carbonization strategy,which is applied as an effective interlayer for Li-S *** Co band valence in CoxP was adjusted to regulate the d-p band *** calculations predict that Co_(x)P with a narrowed d-p band center can optimize the electron transfer kinetics and the adsorption affinity with ***-S full cells with a Co_(x)P@HCNF interlayer demonstrated a high specific capacity of1265 mA h g^(-1)at 0.2C and excellent cycle stability of 788 mA h g^(-1)over 400 cycles at 2.0C.A cell with a lean electrolyte(6.0μL mg^(-1))and a high sulfur loading(6.2 mg cm^(-2))delivered a high areal capacity of4.5 mA h cm^(-2)at *** study demonstrates that bimetallic coupling-induced electronic-state modulation effectively balances the chemical adsorption and catalytic capability for developing high-performance Li-S batteries.

关键词： Lithium-sulfur battery Cobalt phosphide Heterogeneous structures Interlayer

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Precipitation Behavior of MnS Inclusion in Unidirectionally-solidified Fe–18Mn–1Al–0.3C Steels

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Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan 2025年第3期111卷 122-130页

作者： Fan, Yuewen Kameda, Kouki Hu, Xiaojun Matsuura, Hiroyuki State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing China Department of Materials Engineering Graduate School of Engineering The University of Tokyo Japan

In order to reasonably control the precipitation of inclusions during solidification in TWIP steels, the precipitation behavior of typical MnS inclusions in high manganese steel was investigated by unidirectional solidification experiments. Through the combined analyses using ASEM-EDS, optical microscope, and thermodynamic calculation, it was found that Mn concentration in the liquid metal region were higher than those in the solid metal region. Furthermore, closer to the inclusion the liquid phase was, higher its Mn content was. In Fe–18mass%Mn–1Al–0.3C, MnS inclusions can precipitate at the positions located in the junction of dendrites at the end of the solidification (solid fraction fS = 0.96), Mn content reaching 34.88 mass%. Already existing Al2O3 particles could become the core of MnS to form composite inclusions to promote the MnS precipitation during the solidification process. When fS achieved 0.7 leading the Mn segregation in the liquid phase to 25 mass%, MnS starts to precipitate to attach the Al2O3 surface to form composite inclusion. © 2025 The Iron and Steel Institute of Japan.

关键词： Manganese steel

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Time-lapse S-wave tomography at a test dike with changing water levels

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Geophysics 2025年第3期90卷 KS61-KS73页

作者： Minato, Shohei Ghose, Ranajit National Institute of Advanced Industrial Science and Technology Geological Survey of Japan Tsukuba Japan Delft University of Technology Department of Geoscience and Engineering Delft Netherlands

Although seismic methods using S waves can offer high-resolution images of the shallow soil layers, the use of body S-wave tomography for near-surface water monitoring remains underexplored, and the quantitative interpretation of any observed changes in S-wave velocity (VS) in the field conditions is challenging. We conduct a time-lapse S-wave tomography experiment on a field-scale test dike with controlled water levels, allowing for detailed examination of how VS responds to water infiltration. Our results demonstrate that VS decreases progressively, starting from the high-water-side slope and extending across the dike, as the water level rises, with the most significant changes occurring in the sand body and not in the clay cover. The maximum reduction in VS is approximately 40-60 m/s, corresponding to approximately 25%-30% reduction from the initial condition. We use the squared velocity ratio to evaluate the relative contributions of bulk density and shear modulus to VS changes. In the initially unsaturated zone, both factors contribute significantly to the observed VS changes as the zone becomes fully saturated. In fully saturated zones, we assess the changes in the effective stress using the squared VS ratio. Although the low-water side of the dike shows stress changes that are consistent with numerical modeling, the high-water side shows larger stress changes than expected, possibly due to excess pore pressure during the dynamic flow conditions. These findings highlight the potential of body S-wave tomography for high-resolution, near-surface hydrologic monitoring, and provide insights into the complex interactions between physical properties that influence VS changes under varying water levels in field environments. © 2025 The Authors.

关键词： Shear waves

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Crystalline/Non-Crystalline Carbon Co-Modified Strategy to Construct N,S Co-Doped Carbon Layer Wrapped Fe_(0.95)S_(1.05)/Carbon Nanotubes for Enhanced Lithium Storage Property

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Acta Metallurgica Sinica(English Letters) 2025年第1期38卷 93-101页

作者： Liang Chen Lan−Yun Yang Li−Ting Zeng Xu Liu Xin−Rui Li Yu−Shan Tian Wei Wang Gang−Yong Li Chen−Xi Xu Zhao−Hui Hou Key Laboratory of Hunan Province for Advanced Carbon‒based Functional Materials School of Chemistry and Chemical EngineeringHunan Institute of Science and TechnologyYueyang414006China College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha410004China

Due to their high theoretical capacity and abundant resources,transition metal sulfides are regarded as a prospering alternative to replace the commercial graphite anode in lithium-ion batteries(LIBs),particularly for large-scale energy storage and conversion ***,low conductivity,easy agglomeration and obvious volume change greatly impede their practical *** this work,a novel crystalline/non-crystalline carbon co-modified strategy is proposed to fabricate N,S co-doped carbon(NSC)layer wrapped Fe_(0.95)S_(1.05)/carbon nanotubes(CNTs)composite(Fe_(0.95)S_(1.05)/CNTs@NSC)through a simple Fenton reaction followed by a sulfurization *** characterizations and analyses reveal that this strategy well combines the advantages of crystalline CNTs and non-crystalline NSC,ensuring good conductivity and a high contribution to capacity from the carbon ***,the joint encapsulation of Fe_(0.95)S_(1.05)by both CNTs and NSC can significantly mitigate the agglomeration and volume change of Fe_(0.95)S_(1.05)during the continuous charge/discharge *** from these advantageous features,the resultant Fe_(0.95)S_(1.05)/CNTs@NSC composite displays much improved cycling stability and rate capability when compared to the ***,our research offers a distinct and innovative approach to design and construct advanced transition metal sulfides/carbon composite anodes for LIBs.

关键词： Lithium-ion batteries Crystalline/non-crystalline carbon Joint encapsulation Fe_(0.95)S_(1.05)/CNTs@NSC Lithium storage property

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Defect engineering with Rational Dopants Modulation for High‑Temperature Energy Harvesting in Lead‑Free Piezoceramics

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Nano-Micro Letters 2025年第3期17卷 87-101页

作者： Kaibiao Xi Jianzhe Guo Mupeng Zheng Mankang Zhu Yudong Hou Key Laboratory of Advanced Functional Materials Ministry of EducationCollege of Materials Science and EngineeringBeijing University of TechnologyBeijing 100124People’s Republic of China

High temperature piezoelectric energy harvester(HTPEH)is an important solution to replace chemical battery to achieve independent power supply of HT wireless ***,simultaneously excellent performances,including high figure of merit(FOM),insulation resistivity(ρ)and depolarization temperature(Td)are indispensable but hard to achieve in lead-free piezoceramics,especially operating at 250°C has not been reported ***,well-balanced performances are achieved in BiFeO3–BaTiO3 ceramics via innovative defect engineering with respect to delicate manganese *** to the synergistic effect of enhancing electrostrictive coefficient by polarization configuration optimization,regulating iron ion oxidation state by high valence manganese ion and stabilizing domain orientation by defect dipole,comprehensive excellent electrical performances(Td=340°C,ρ250°C>10^(7)Ωcm and FOM_(250°C)=4905×10^(–15)m^(2)N^(−1))are realized at the solid solubility limit of manganese *** HT-PEHs assembled using the rationally designed piezoceramic can allow for fast charging of commercial electrolytic capacitor at 250°C with high energy conversion efficiency(η=11.43%).These characteristics demonstrate that defect engineering tailored BF-BT can satisfy high-end HT-PEHs requirements,paving a new way in developing selfpowered wireless sensors working in HT environments.

关键词： Lead-free piezoceramic Defect engineering Dopants modulation High-temperature Piezoelectric energy harvester

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Advance Warning Prior to Capacity Plunge of Liquid Metal Battery Using Data-driven Methods

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IEEE Transactions on Industry Applications 2025年第3期61卷 4147-4154页

作者： Shi, Qionglin Zhou, Min Li, Haomiao Wang, Kangli Jiang, Kai Ministry of Education Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering School of Electrical and Electronic Engineering Engineering Research Center of Power Safety and Efficiency Wuhan China

The liquid metal battery (LMB) has gained attention as a novel energy storage technology due to its exceptional safety and long lifespan. Analyzing the aging trajectory, particularly capacity plunge process, is crucial for understanding its aging mechanism and enabling effective health diagnosis. However, it often lacks clear warning signs prior to the capacity plunge, hindering accurate capacity prediction and proactive measures in real-world applications. To address this challenge, this study proposes a data-driven method that effectively quantifies the capacity various in LMBs, enabling advance warning before the occurrence of a capacity plunge. Firstly, the Empirical Mode Decomposition method decomposes the capacity data into several components, representing different characteristics of LMBs. Subsequently, a Gaussian mixture model is applied to construct the feature distribution for each component, which exhibits a hump-shaped pattern. Finally, The Jensen-Shannon divergence is used to quantify the divergence of these humps, offering a concrete measure of LMB health and aging progression. The proposed method integrating both aging analysis and data-driven insights provides an advance warning of the capacity plunge, offering a reliable foundation for future lifespan prediction and fault diagnosis of LMBs. © 2025 IEEE.

关键词： Network security

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