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Electronic modulation induced by coupling RuO_(2)with electron-donating Co_(3)O_(4)for high-active and long-life rechargeable Zn-air batteries

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Journal of Energy Chemistry 2025年第2期101卷 99-109,I0004页

作者： Xuena Ma Zhangxin Xu Mingyang Liu Panzhe Qiao Qi Li Ruihong Wang Baojiang Jiang Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People's Republic of ChinaSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080HeilongjiangChina Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China

Electronic-state modulation strategy offers great potential in designing RuO_(2)-based bifunctionalelectrocatalysts for rechargeable Zn-air batteries(ZABs).Various three-dimensional(3D)transition metal oxides are attempted to couple with RuO_(2)for constructing an appropriate Ru—O—M *** work aims to construct Co_(3)O_(4)-RuO_(2)heterostructures on carbon sheets(Co_(3)O_(4)/RuO_(2)/NCNS)for boosting electronic transfer and *** and theoretical calculations identify the electronic transfer from Co_(3)O_(4)to RuO_(2)that modulates the electronic structure of metal surfaces/***,it leads to the increase in Co3+content,electron-rich state at RuO_(2)surface and electronic accumulation at ***,this electronic-state modulation optimizes the d-band center in Co_(3)O_(4)/RuO_(2)that lowers the reaction barriers and endows interfaces as the biggest contributor to oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)performance,The Co_(3)O_(4)/RuO_(2)/NCNS shows a quite low potential difference of 0.62 V and remarkable durability for ORR/***_(3)O_(4)/RuO_(2)/NCNS-assembled ZABs exhibit an excellent specific capacity of 818.3 mA h g^(-1)and a superior lifespan over 750 h.

关键词： Co_(3)O_(4)-RuO_(2)heterostructure Electronic modulation Reaction energy barrier Zn-air battery Charge-discharge stability

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Ballistic response mechanism and resistance-driven evaluation method of UHMWPE composite

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Defence Technology(防务技术) 2025年第2期44卷 1-16页

作者： Yemao He Johnny Qing Zhou Yanan Jiao Hongshuai Lei Zeang Zhao Daining Fang Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Beijing Institute of TechnologyBeijing 100081China Beijing Protech New Material Science Co. Ltd.Beijing 102200China School of Textile Science and Engineering Tiangong UniversityTianjin 300387China Key Laboratory of Advanced Textile Composite Materials Ministry of EducationInstitute of Textile Composite MaterialsTiangong UniversityTianjin 300387China

The use of ultra-high molecular weight polyethylene(UHMWPE)composite in the design of lightweight protective equipment,has gained a lot of ***,there is an urgent need to understand the ballistic response mechanism and theoretical prediction model of *** paper explores the ballistic response mechanism of UHMWPE composite through experimental and simulation ***,a resistance-driven modeling method was proposed to establish a theoretical model for predicting the bulletproof *** ballistic response mechanism of UHMWPE composite encompassed three fundamental modes:local response,structural response,and coupled *** occurrence ratio of these fundamental response modes during impact was dependent on the projectile velocity and laminate *** bulletproof performance of laminate under different response modes was assessed based on the penetration depth of the projectile,the bulging height on the rear face of the laminate,the thickness of remaining sub-laminate,and residual velocity of the *** absolute deviations of bulletproof performance indicator between theoretical value and experimental value were well within 11.13%,demonstrating that the established evaluation model possessed high degree of prediction accuracy.

关键词： UHMWPE composite Ballistic response mechanism Theoretical model Performance evaluation

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Electrochemical dissolution, reduction, and nucleation mechanisms of molybdenum in NaCl-KCl molten salt systems

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Journal of materials Science and Technology 2025年 238卷 45-54页

作者： Lv, Hongzhan Zhang, Liwen Xi, Xiaoli Nie, Zuoren Collaborative Innovation Center of Capital Resource-Recycling Material Technology Beijing University of Technology Beijing100124 China Key Laboratory of Advanced Functional Materials Ministry of Education Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China National Engineering Laboratory for Industrial Big-data Application Technology Beijing University of Technology Beijing100124 China

This study investigates the anodic dissolution and electrochemical behavior of molybdenum in a NaCl-KCl molten salt system at 1023 K. The anodic dissolution process was systematically analyzed, revealing a sequential oxidation pathway of molybdenum into high-valence ions (Mo6+, Mo5+, Mo4+) under varying electrolysis potentials. Electrochemical Impedance Spectroscopy (EIS) demonstrated that the dissolution is governed by both charge transfer and diffusion mechanisms, with reduced impedance at higher potentials facilitating molybdenum dissolution. The reduction behavior of dissolved molybdenum ions was further explored using cyclic voltammetry (CV) and square wave voltammetry (SWV), confirming a multi-step reduction process controlled by diffusion and high reversibility. Nucleation studies using chronoamperometry established that molybdenum deposition follows an instantaneous nucleation mechanism. Morphological analysis of cathodic deposits revealed that current density significantly influences particle size, transitioning from nano-sized spherical particles to larger equiaxed crystals with increasing current density. These findings provide a comprehensive understanding of molybdenum's electrochemical properties in molten salts, offering valuable insights for optimizing electrolysis processes and advancing molybdenum-based material production. © 2025

关键词： Cyclic voltammetry

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Impact of Hard Segment Structures on Fatigue Threshold of Casting Polyurethane Using Cutting Method

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Chinese Journal of Polymer Science 2025年第2期43卷 303-315页

作者： Guang-Zhi Jin Le-Hang Chen Yu-Zhen Gong Peng Li Run-Guo Wang Fan-Zhu Li Yong-Lai Lu State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing100029China Engineering Research Center of Elastomer Materials Energy Conservation and Resources Ministry of EducationBeijing100029China Key Laboratory of Carbon Fiber and Functional polymers Beijing University of Chemical TechnologyBeijing100029China Center of Advanced Elastomer Materials College of Material Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China

The fatigue resistance of casting polyurethane(CPU)is crucial in various sectors,such as construction,healthcare,and the automotive *** its importance,no studies have reported on the fatigue threshold of *** study employed an advanced Intrinsic Strength Analyzer(ISA)to evaluate the fatigue threshold of CPUs,systematically exploring the effects of three types of isocyanates(PPDI,NDI,TDI)that contribute to hard segment structures based on the cutting *** multiple advanced characterization techniques(XRD,TEM,DSC,AFM),the results indicate that PPDI-based polyurethane exhibits the highest fatigue threshold(182.89 J/m^(2))due to a highest phase separation and a densely packed spherulitic structure,although the hydrogen bonding degree is the lowest(48.3%).Conversely,NDI-based polyurethane,despite having the high hydrogen bonding degree(53.6%),exhibits moderate fatigue performance(122.52 J/m^(2)),likely due to a more scattered ***-based polyurethane,with the highest hydrogen bonding degree(59.1%)but absence of spherulitic structure,shows the lowest fatigue threshold(46.43 J/m^(2)).Compared to common rubbers(NR,NBR,EPDM,BR),the superior fatigue performance of CPU is attributed to its well-organized microstructure,polyurethane possesses a higher fatigue threshold due to its high phase separation degree and orderly and dense spherulitic structure which enhances energy dissipation and reduces crack propagation.

关键词： Casting polyurethane Fatigue threshold Cutting method Hard segment structures materials characterization

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Accurate regulation of carbon skeletons bonded to Fe-N_(4)single atom nanozymes for efficient generation of reactive oxygen species

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Science China Chemistry 2025年第3期68卷 1067-1077页

作者： Fuchun Nan Qilin Wei Tongtong Kou Yuxuan Zhao Lanbo Shen Dawei Li Tong Chang Lingyun Wang Fangfang Lang William W.Yu School of Chemistry and Chemical Engineering Ministry of Education Key Laboratory of Special Functional Aggregated MaterialsShandong Key Laboratory of Advanced Organosilicon Materials and TechnologiesShandong UniversityJinan 250100China Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion Science Center for Material Creation and Energy ConversionShandong UniversityQingdao 266237China Department of Urology Qilu Hospital of Shandong UniversityJinan 250063China Jinan Central Hospital Shandong First Medical UniversityJinan 250013China School of Integrated Circuits Shandong UniversityJinan 250101China Shandong Provincial Maternal and Child Health Care Hospital Qingdao UniversityJinan 250014China

Rational design of single atom nanozymes(SAzymes)could be achieved through the accurate configuration regulation of metal coordination sites,nevertheless,the un-defined carbon environment of traditional SAzymes synthesized by high-temperature pyrolysis makes it difficult to unveil the influence of carbon skeletons with enzyme mimicking activities of ***,we investigated the relationship between the carbon skeletons and the enzyme mimicking activities through the construction of a series of fullyπ-conjugated covalent organic polymer(COP)-based SAzymes with analogous Fe-N_(4)*** experimental results and theoretical calculations demonstrated that carbon skeletons bonded to the Fe-N_(4)catalytic sites strongly affect the enzyme mimicking activities of COP *** the number of benzene rings in carbon skeletons was 1,the COP SAzyme possessed much more remarkable oxidase(OXD)and peroxidase(POD)mimicking activities,and further reducing or increasing the benzene rings would dramatically inhibit the enzyme mimicking ***,the fantastic enzyme mimicking activity of COP-1 could be applied to colorimetric detection of biological molecules and degradation of *** results provide a new perspective for the rational fabrication of SAzymes with high catalytic efficiency.

关键词： single atom nanozyme covalent organic polymer carbon skeleton reactive oxygen species generation

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Achieving a large field-induced polarization and energy density in BaTiO_(3)films sputter-deposited on Si at 200℃ via a buffer-layer technique

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Journal of advanced Ceramics 2025年第3期14卷 69-78页

作者： Chao Liu Jun Ouyang Yuyao Zhao Hanfei Zhu Hongbu Cheng Zhenyan Liang Li Wang Institute of Advanced Energy Materials and Chemistry Jinan Engineering Laboratory for Multi-scale Functional MaterialsShandong Provincial Key Laboratory of Molecular EngineeringSchool of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China Key Laboratory of Key Film Materials&Application for Equipments(Hunan Province) Hunan Provincial Key Laboratory of Thin Film Materials and DevicesSchool of Material Sciences and EngineeringXiangtan UniversityXiangtan 411105China Key Laboratory for Liquid–Solid Structure Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China

Ferroelectric oxide films with a large field-induced polarization can be used in dielectric capacitors for charge or energy storage in microelectronic systems and hence have attracted intense research interest.A high processing temperature is usually required to produce a well-crystallized polar phase and hence a large polarization in the film,corresponding to a high charge or energy ***,high processing temperature not only reduces the charge‒discharge efficiency by producing a sizable remnant polarization but is also incompatible with the integration *** this study,we address this problem by creating a large field-induced polarization(~55.8μC/cm^(2))in BaTiO_(3)films sputter-deposited on Si at 200℃ via a buffer-layer *** large polarization led to a high energy density and efficiency(Wrec≈94.7 J/cm^(3),η≈78.2%@4 MV/cm).The thickness of LaNiO_(3)buffer layer was revealed to be the key factor determining the electric polarization(remnant and field-induced ones).A 50 nm LaNiO_(3)thickness,corresponding to the aforementioned polarization and energy storage performance,not only ensures proper crystallization in the BaTiO_(3)film,but also leads to an optimal combination of polycrystalline grains with a high dielectric *** latter accounts for the majority of the field-induced *** results revealed the key role of a buffer layer in tuning the microstructure of a low-temperature deposited ferroelectric oxide ***,the excellent charge/energy storage performance of these 200℃-deposited BaTiO_(3)films has provided many opportunities for this simple dielectric in microelectronics.

关键词： ferroelectric oxide films field-induced polarization BaTiO_(3) LaNiO3 energy density

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Modulation of the octahedral structure and potential superconductivity of La_(3)Ni_(2)O_(7)through strain engineering

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Science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 145-152页

作者： Zihao Huo Zhihui Luo Peng Zhang Aiqin Yang Zhengtao Liu Xiangru Tao Zihan Zhang Shumin Guo Qiwen Jiang Wenxuan Chen Dao-Xin Yao Defang Duan Tian Cui Key Laboratory of Material Simulation Methods&Software of Ministry of Education State Key Laboratory of Superhard MaterialsCollege of PhysicsJilin UniversityChangchun130012China Center for Neutron Science and Technology Guangdong Provincial Key Laboratory of Magnetoelectric Physics and DevicesState Key Laboratory of Optoelectronic Materials and TechnologiesSchool of PhysicsSun Yat-sen UniversityGuangzhou510275China MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic PhysicsSchool of PhysicsXi’an Jiaotong UniversityXi’an710049China Institute of High Pressure Physics School of Physical Science and TechnologyNingbo UniversityNingbo315211China

The recent transport measurements of La_(3)Ni_(2)O_(7)uncovered a“right-triangle”shape of the superconducting dome in the pressure-temperature(P-T)phase *** by this,we perform theoretical first-principles studies of La_(3)Ni_(2)O_(7)with the pressure ranging from 0 to 100 ***,we reveal a pressure dependence of the Ni-d_(z^(2))electron density at the Fermi energy(n_(z)^(E_(F)))that highly coincides with such *** this basis,we further explore the electronic structure under uniaxial *** tracking the stress response of n_(z)^(E_(F)),we propose that superconductivity can be achieved by applying only ~2GPa of compression along the c *** idea is further exemplified from the perspectives of lattice distortion,band structure,Fermi surface and superconducting phase *** also discuss the possible charge modulation under the stress and provide an insight into the relation between nz E Fand the superconducting T_(c)in La_(3)Ni_(2)O_(7)*** study provides new routes to the search of high-T_(c)superconductors in future experiments.

关键词： nickelate superconductors density functional theory strong correlated systems strain engineering

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Effect of fiber breakage defect and waviness defect on compressive fatigue behavior and damage evolution of 3D multiaxial braided composites

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Chinese Journal of Aeronautics 2025年第2期38卷 491-504页

作者： Yan SUN Yifan ZHANG Tao LIU Yunjuan JING Jun MA Yao LU Chan WANG Xinhai HE Xiaogang CHEN Wei FAN School of Textile Science and Engineering Xi’an Polytechnic UniversityXi’an 710048China Key Laboratory of Advanced Textile Composite Materials Ministry of EducationTiangong UniversityTianjin 300387China Shaanxi Yuanfeng Textile Technology Research Co.LTD. Xi’an 710038China Longi Green Energy Technology Co.LTD. Xi’an 710068China Department of Textile Engineering and Materials School of MaterialsThe University of ManchesterManchester M139PLUK Key Laboratory of Functional Textile Material and Product of Ministry of Education Xi’an Polytechnic UniversityXi’an 710048China

This paper reports the effects of fiber breakage defects and waviness defects on the compressive fatigue behavior and the progressive damage evolution process of 3D Multiaxial Braided Composites (3DMBCs). Combined with finite element compression simulation and ultra-depth microscope, the internal defect content of composites with different braiding angles was determined. The results demonstrate that the weakening effect of waviness and fiber breakage defects is greater than the strengthening effect of the braiding angle. This causes the fatigue resistance of 3DMBCs with the 31° braiding angle being better in both directions of 0° and 90°. The increase of 4° waviness and 10% fiber breakage defect results in the average fatigue life of composites being shortened by 48% and the energy consumption rate increased by 10% at 85% stress level in 90° compression direction. The alteration in loading direction modifies the included angle corresponding to the stress component. The stress component parallel to the fiber direction under compressive fatigue load leads to interfacial debonding in the composites, whereas the stress component perpendicular to the fiber direction results in pronounced shear failure.

关键词： Three-dimensional reinforcement Defects Compression fatigue behavior Mechanical properties Crack propagation Numerical analysis

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Interfacial modification enhancing corrosion resistance of boron nitride nanosheets/Al matrix composites

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Journal of materials Science & Technology 2026年 240卷 98-113页

作者： Ancang Yang Lishi Ma Yonghua Duan Xudong Rong Yimin Zhang Lin Zhu Shanju Zheng Mingjun Peng Mengnie Li Faculty of Material Science and Engineering Yunnan Key Laboratory of Integrated Computational Materials Engineering for Advanced Light Alloys Kunming University of Science and Technology Kunming 650093 China School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional Materials Tianjin University Tianjin 300350 China National Key Laboratory of Nuclear Fuel and Material Nuclear Power Institute of China Chengdu 610041 China

The difference in electrochemical behavior between reinforcement and metal matrix usually damages the corrosion resistance of composites. Herein, the coherent BNNSs-AlN-Al transition interface is creatively constructed in the Aluminium-Boron nitride nanosheets (Al-BNNSs) system based on reactive sintering. It is demonstrated that BNNSs/Al composites exhibit good corrosion resistance via interfacial modification. The BNNSs-AlN-Al transition interface not only optimizes the interfacial structure of BNNSs/Al composites but also significantly enhances the interface bonding strength. Many low-angle grain boundaries (LAGBs) are induced during extrusion due to the pinning effect of strong bonding transition interface. Besides, density functional theory (DFT) calculation and geometric phase analysis (GPA) were executed to clarify the influence of interface design on the corrosion behavior of BNNSs/Al composites. It is found that the transition interface and LAGBs have strong valence electron constraint ability, thus weakening the galvanic effect in composites. Also, the construction of the transition interface reduces the geometrically necessary dislocations and lattice distortion in the grains of Al matrix, avoiding the decrease of corrosion potential of Al matrix. Ultimately, the coupling effect between LAGB and transition interface not only significantly enhances the ion erosion resistance of composites, but also shifts the corrosion mechanism from intergranular corrosion (IGC) to pitting corrosion (PC) in Al matrix. The current work provides a feasible route for the design of aluminum matrix composites (AMCs) with high corrosion resistance.

关键词： BNNSs/Al composites Coherent transition interface Corrosion potential Corrosion resistance

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Regulating the local electronic structure by constructing Ni–O–Ni sites confined in TiO2 for selective photocatalytic glycerol reforming

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Journal of Energy Chemistry 2025年 108卷 129-137页

作者： Liu, Jianan Zhou, Yujie Fan, Yuying Sun, Xuemeng Qiao, Panzhe Xiao, Xudong Zhang, Qun Tian, Chungui Jiang, Baojiang Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People's Republic of China School of Chemistry and Materials Science Heilongjiang University Heilongjiang Harbin150080 China Hefei National Research Center for Physical Sciences at the Microscale Department of Chemical Physics University of Science and Technology of China Anhui Hefei230026 China Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai201210 China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai201210 China

Engineering the local electronic structure of atomic-dispersed catalytic sites plays a critical role in selective photocatalysis. Here, we show the regulation of local electronic structure of atomic-dispersed Ni sites by forming oxygen-bridged diatomic Ni–O–Ni confined in MOF-derived TiO2 (O–Ni2/TiO2) via oxalic acid chelation. Among them, MOF-derived TiO2 scaffold provides a highly porous structure, supporting highly exposed active sites of Ni–O–Ni dimers linked by oxygen bridges. Density functional theory calculations show that the Ni–O–Ni sites regulate the local electronic structure of Ni sites, promoting the adsorption and activation of reactant molecules. Ultrafast spectroscopy shows that, in comparison with monomeric Ni/TiO2, the strong interaction in dimeric O–Ni2/TiO2 tends to bring forth a more pronounced suppression of photogenerated electron–hole recombination, beneficial for achieving better charge separation and transfer as desired. As a direct outcome, the O–Ni2/TiO2 photocatalyst has shown enhanced photocatalytic activity and selectivity in glycerol reforming reaction, with the average rates of H2 and CO evolution attaining as high as 2542.6 and 361.7 μmol g−1 h−1, respectively, along with a remarkable selectivity of 96.1% towards the syngas production (under a 365-nm light irradiation). Notably, the H2 and CO yields of the O–Ni2/TiO2 photocatalyst are 3.9 and 6.7 times higher than those of the Ni/TiO2 photocatalyst, respectively. This study highlights the beneficial role of engineering the local electronic structure of atomic-dispersed catalytic sites and provides an effective way for selective photocatalytic biomass conversion. © 2025 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences

关键词： Local density approximation

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