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Tensile Strain and Interatomic Orbital Hybridization Effects Boost the Electrocatalytic Performance of Intermetallic Pd3Pb Nanowires for Ethanol Electrooxidation

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Chinese Journal of Chemistry 2024年第21期42卷 2633-2640页

作者： Bo-Qiang Miao Zi-Han Yuan Xi-Lai Liu Xuan Ai Guang-Tao Zhao Pei Chen Pu-Jun Jin Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'anShaanxi710062 China

We present a strategy that effectively modulate the d-band electronic structure of the active center by strain effect and interatomic orbital *** strategy efficiently promotes the kinetic process of the ethanol oxidation reaction(EOR)in alkaline *** the intermetallic Pd_(3)Pb nanowires,the introduction of Pb not only causes the lattice expansion of Pd but also achieves the interatomic orbital hybridization bonding with *** interatomic orbital hybridization effect and tensile strain effect can effectively achieve a co-regulation of the d-band electronic structure of Pd,which directly affects the adsorption behavior of intermediate on Pd for ***,the intermetallic Pd_(3)Pb nanowires demonstrate enhanced EOR activity and anti-poisoning ability against CO_(ads).Theoretical calculations show that the enhanced OH^(*)adsorption ability and the low energy barrier for the oxidative dehydrogenation of ethanol are the keys to high EOR activity and stability of the intermetallic Pd_(3)Pb nanowires.

关键词： Intermetallic structure Orbital hybridization d-band structure Ethanol oxidation Synergistic effect

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Incommensurate modulated structure and its influence on the martensitic transformation temperature span of single phase multielement Ni-Cu-Co-Mn-Ga two-way shape memory single crystals

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材料科学技术（英文版） 2025年第5期208卷 230-240页

作者： Qijjia Yu Yang Liu Chen Si Wenjia Wang Jiaxi Meng Jingmin Wang Jinghua Liu Chengbao Jiang Key Laboratory of Advanced Aerospace Materials and Performance(Ministry of Education) School of Materials Science and EngineeringBeihang UniversityBeijing 100191PR China Center of Microstructure Science Frontier Institute of Science and TechnologyState Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'an 710049PR China

Significant two-way shape memory effect(TWSME)was achieved in single crystals of single-phase mul-tielement Ni42-xCu8CoxMn37Ga13(8 ≤ x ≤ 12)alloys by performing thermomechanical ***,anomalous dependence of the martensitic transformation temperature span on Co content was *** training,quite a narrow temperature span of the martensitic transformation,nearly independent of the Co content,was observed in all single *** training the temperature span was still narrow for 8 ≤ x ≤ 10.9 but was obviously expanded for 10.9＜x ≤ ***-resolution transmission electron microscopy revealed that at the atomic scale,there exists incommensurate modulated structure in the single phase single crystals,as evidenced by nonperiodic satellite spots in the selected area electronic diffraction ***,the modulated wave vector of the satellite spots was increased by higher Co *** first principal calculations it was considered that the incommensurate modulated structure originates from the formation of Co-Co *** training arrays of ordered dislocations with the same Burgers vector were introduced for 8 ≤ x ≤ 10.9 but the network of dislocations was formed for 10.9＜x ≤ *** on analysis of transmission electron microscopy,geometric phase,thermody-namics,and Landau theory,it was considered that the austenite/martensite phase interface was pinned by the network of dislocations,expanding the temperature span of the martensitic *** work supplies new insights for understanding the microstructure and martensitic transformation of Ni-Mn-Ga-based alloys.

关键词： Martensitic transformation Incommensurate modulated structure Temperature span Dislocation Two-way shape memory effect

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Low infrared emitter from Ti3C2Tx MXene towards highly-efficient electric/solar and passive radiative heating

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Journal of materials science & Technology 2023年第2期133卷 32-40页

作者： Mingming Shen Jiahao Ni Yanxia Cao Yanyu Yang Wanjie Wang Jianfeng Wang College of Materials Science and Engineering Henan Key Laboratory of Advanced Nylon Materials and ApplicationZhengzhou UniversityZhengzhou 450001China

Realizing all-day and all-weather energy-saving heating is crucial for mitigating the global energy and ecology ***/solar heating are two promising heating approaches,yet materials with high elec-trical conductivity,high solar absorptivity,and low infrared emissivity at the same time are rare in na-ture,which are highly anticipated and of great significance for highly efficient electric/solar *** this work,we demonstrate that Ti_(3)C_(2)T_(x) MXene with low IR emissivity(14.5%)fills the gap in the absence of the above materials,exhibiting a remarkable electric/solar heating *** saturated heating temperature of Ti_(3)C_(2)T_(x) film reaches a record-high value of 201°C at a low driving voltage of 1.5 V,and reaches 84.3°C under practical solar irradiation(750 W/m^(2))with a high solar to the thermal conversion efficiency of 75.3%,which is far superior to other reported ***,the low IR emissivity endows Ti_(3)C_(2)T_(x) with a remarkable passive radiative heating capability of 7.0°C,ensuring zero-energy heating without electric/solar energy *** intrinsic characteristic of high electrical conductivity,high solar absorptivity,and low IR emissivity makes Ti_(3)C_(2)T_(x) unique existence in nature,which is highly promising for all-day and all-weather energy-saving heating.

关键词： Ti3C2Tx MXene Low infrared emitter Thermal radiation emission Electric/solar heating Passive radiative heating

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Cryoactivated proton-involved redox reactions enable stable-cycling fiber cooper metal batteries operating at-50℃

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Journal of Energy Chemistry 2023年第5期80卷 758-767,I0016页

作者： Changyuan Yan Zixuan Chen Hongzhong Deng Hao Huang Xianyu Deng Shenzhen Key Laboratory of Advanced Materials School of Materials Science and EngineeringHarbin Institute of TechnologyShenzhen 518055GuangdongChina

Fiber-shaped batteries that feature outstanding flexibility,light weight,and wovenability are extremely attractive for powering smart wearable electronic textiles,which further stimulates their demand in extreme ***,there are rare reports on ultralow-temperature fiber batteries to *** is mainly attributed to the poor conductivity of electrodes and freezing of electrolytes that restrain their satisfactory flexible operation in cold ***,we propose a fiber cooper metal battery consisting of a conductive polyaniline cathode,an anti-freezing Cu(BF4)2+H3PO4electrolyte and an acidresistant copper wire anode,which can withstand various deformations at ultralow ***,enhanced capacity and cyclic stability can be achieved by cryoactivated abundant reactive sites in the polyaniline,while benefiting from redox reactions with rapid kinetics involving protons rather than copper ***,this well-designed polyaniline/Cu fiber battery delivers excellent flexibility without obvious capacity decay after being bent at-30℃,as well as a remarkable discharge capacity of 120.1 mA h g-1and a capacity retention of 96.8%after 2000 cycles at-50℃.The fiber batteries integrated into wearable textiles can power various electronic *** performances greatly outperform those of most reported ***,this work provides a promising strategy toward applications of cryogenic wearable energy storage devices.

关键词： Cryoactivated sites Proton-involved redox reactions Fiber cooper metal battery Polyaniline Cyclic stability Low temperature

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Structural Difference in the Core-forming Block Reshapes RAFT-mediated Polymerization-induced Self-assembly

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Chinese Journal of Polymer science 2025年第3期43卷 429-438页

作者： Yue-Xi Zhan Li Zhang Chun Feng Jian-Bo Tan Department of Polymeric Materials and Engineering School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter Guangzhou 510006China Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

Polymerization-induced self-assembly(PISA)has become one of the most versatile approaches for scalable preparation of linear block copolymer nanoparticles with various ***,the controlled introduction of branching into the core-forming block and the effect on the morphologies of block copolymer nanoparticles under PISA conditions have rarely been ***,a series of multifunctional macromolecular chain transfer agents(macro-CTAs)were first synthesized by a two-step green light-activated photoiniferter polymerization using two types of chain transfer monomers(CTMs).These macro-CTAs were then used to mediate reversible addition-fragmentation chain transfer(RAFT)dispersion polymerization of styrene(St)to prepare block copolymers with different core-forming block structures and the *** effect of the core-forming block structure on the morphology of block copolymer nanoparticles was investigated in *** electron microscopy(TEM)analysis indicated that the brush-like core-forming block structure facilitated the formation of higher-order morphologies,while the branched core-forming block structure favored the formation of lower-order ***,it was found that using macroCTAs with a shorter length also promoted the formation of higher-order ***,structures of block copolymers and the assemblies were further controlled by changing the structure of macro-CTA or using a binary mixture of two different *** expect that this work not only sheds light on the synthesis of block copolymer nanoparticles but also provide important mechanistic insights into PISA of nonlinear block copolymers.

关键词： Polymerization-induced self-assembly RAFT polymerization Block copolymer nanoparticles Branched structure

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C2-phenyl-substituted benzimidazolium-based covalent organic framework as efficient catalyst for CO_(2) conversion without solvents,metals,and cocatalysts

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science China Chemistry 2024年第2期67卷 551-557页

作者： Zhenzhen Wu Jing Wang Lili Liu Shang Guo Juan Li Xianming Zhang Shanxi Institute for Functional Food Shanxi Agricultural UniversityTaiyuan030031China Institute of Crystalline Materials Shanxi UniversityTaiyuan030006China Key Laboratory of Interface Science and Engineering in Advanced Materials College of ChemistryTaiyuan University of TechnologyTaiyuan030024China

Covalent organic frameworks(COFs) are a potential platform for carbon dioxide(CO_(2)) conversion owing to their periodic permanent porosity,adjustable structure,and chemical *** good catalytic performance in CO_(2) conversion,collaborative multifunctions should be strategically integrated into the catalytic system design and *** this study,a four-in-one high-efficiency catalyst was synthesized and tested for CO_(2) cycloaddition to form cyclic *** obtained Tp-MPB-BrCOF had a high nitrogen content,which enhanced its CO_(2) affinity through substantial Lewis acid-base or dipole-quadrupole interactions;moreover,the acid(protons transferring from oxygen(–OH) to nitrogen(–NH)),hydrogen bond donor(hydroxyl group),and Br-(nucleophile group) served as three active sites,further improving the catalyst *** results provide a basis for designing efficient and stable CO_(2)-conversion catalysts.

关键词： covalent organic framework C2-phenyl-substituted benzimidazolium CO_(2)conversion four-in-one catalyst

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Simultaneously enhancing the hot workability and room-temperature strength of Ti-6Al-4V alloy via adding Mo and Fe

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Journal of materials science & Technology 2024年第13期180卷 32-44页

作者： Jie Shen Zhihao Zhang Jianxin Xie Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Key Laboratory for Advanced Materials Processing(MOE) University of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China

Reducing the hot working temperature and high-temperature deformation resistance of titanium alloy to improve hot rolling and hot extrusion workability of products with thin walls and complex section shapes has always been an important topic in the field of titanium alloy *** paper proposed a strategy of adding Mo and Fe elements to simultaneously reduce the hot working temperature and high-temperature deformation resistance of Ti-6Al-4V *** effects of Mo and Fe contents on the mi-crostructure,β transus temperature(Tp),and high-temperature flow stress(HFS)of Ti-6Al-4V-xMo-xFe(x=0-5)alloys were *** results showed that adding Mo and Fe can substantially reduce the Tp and HFS of the alloy,and greatly improve its room-temperature *** with com-mercial Ti-6Al-4V samples,the T_(β) of Ti-6Al-4V-2Mo-2Fe and Ti-6Al-4V-3Mo-3Fe samples was decreased by 68-98 ℃,and the HFS at 800-900 ℃ was decreased by 37.8%-46.0%.Compared with hot-rolled Ti-6Al-4V samples,the room-temperature tensile strength of hot-rolled Ti-6Al-4V-2Mo-2Fe samples was increased by about 30%,while the elongation hardly *** increased strength was mainly at-tributed to fine grain strengthening and solid solution *** hot workability and room-temperature strength of Ti-6Al-4V alloy can be significantly improved by adding 2-3 wt.%Mo and Fe simultaneously.

关键词： Titanium alloy High-temperature flow stress Hot workability Room-temperature strength

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Scalable fabrication of high-performance two-dimensional nanocomposites

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science Bulletin 2025年第9期70卷 1368-1370页

作者： Liping Zhu Meifang Zhu State Key Laboratory of Advanced Fiber Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Two-dimensional(2D)nanomaterials,including graphene,titanium carbide(MXenes),montmorillonite,and boron nitride,etc.,have excellent mechanical,electrical,and thermal properties and good biocompatibility,which show promising applications in aerospace,flexible electronics,and biomedicine[1,2].It remains a great challenge to scalable assemble the 2D nanomaterials into highperformance macroforms for realizing these commercial *** nacre is a typical 2D nanocomposite composed of 95 vol%aragonite flakes and 5 vol%biopolymer and possesses unique mechanical properties owing to its ordered layered structure and sophisticated interface interactions[3].Inspired by the relationship between microstructure and macro-property of nacre,various assembly strategies have been developed to fabricate high-performance 2D nanocomposites by improving interlayer connectivity,alignment。

关键词： graphenetitanium carbide mxenes montmorilloniteand d nanocomposite d nanomaterials highperformance macroforms high performance two dimensional nanocomposites mxenes scalable fabrication boron nitrideetchave

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Rescue of dead MnO2 for stable electrolytic Zn-Mn redox-flow battery:a metric of mediated and catalytic kinetics

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National science Review 2024年第8期11卷 219-228页

作者： Qi Wang Wanhai Zhou Yanyan Zhang Hongrun Jin Xinran Li Tengsheng Zhang Boya Wang Ruizheng Zhao Junwei Zhang Wei Li Yu Qiao Chuankun Jia Dongyuan Zhao Dongliang Chao Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials State Key Laboratory of Molecular Engineering of Polymers College of Chemistry and Materials Fudan University State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials (iChEM)Department of Chemistry College of Chemistry and Chemical EngineeringXiamen University Institute of Energy Storage Technology College of Materials Science and EngineeringChangsha University of Science &Technology

The virtues of electrolytic MnO2aqueous batteries are high theoretical energy density,affordability and ***,the continuous dead MnO2and unstable Mn2+/MnO2electrolysis pose challenges to the practical output energy and ***,we demonstrate bifunctional cationic redox mediation and catalysis kinetics metrics to rescue dead MnO2and construct a stable and fast electrolytic Zn-Mn redox-flow battery（eZMRFB）.Spectroscopic characterizations and electrochemical evaluation reveal the superior mediation kinetics of a cationic Fe2+redox mediator compared with the anionic ones（e.g.I-and Br-）,thus eliminating dead *** intensified oxygen vacancies,density functional theory simulations of the reaction pathways further verify the concomitant Fe-catalys ed Mn2+/MnO2electrolysis kinetics via charge delocalization and activated O 2p electron states,boosting its rate *** a result,the elaborated eZMRF B achieves a coulombic efficiency of nearly 100%,ultra-high areal capacity of 80 mAh cm-2,rate capability of 20 C and a long lifespan of 2500 *** work may advance high-energy aqueous batteries to next-generation scalable energy storage.

关键词： aqueous batteries high areal capacity dead MnO2 redox mediator catalysed kinetics

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Phase formation mechanism of Cr2AlC MAX phase coating:In-situ TEM characterization and atomic-scale calculations

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材料科学技术（英文版） 2025年第3期206卷 176-184页

作者： Guanshui Ma Haichen Wu Zhi Fang Xiaohui Zhou Rende Chen Wei Yang Jiayue Zhang Zhenyu Wang Aiying Wang Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Analytical Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Beijing Innovation Centre for Engineering Science and Advanced Technology School of Materials Science and EngineeringPeking UniversityBeijing 100871China

Cr2AlC,a representative MAX phase,gains increasing attention for the excellent oxidation tolerance and corrosion resistance used in harsh high temperature and strong radiation ***,the lack of the phase formation mechanism has become the key bottleneck to the practical applications for Cr2AlC synthesis with high purity at low *** this work,we fabricated the amorphous Cr-Al-C coating by a hybrid magnetron sputtering/cathodic arc deposition technique,in which the in-situ heating transmission electron microscopy(TEM)was conducted in a temperature range of 25-650 ℃ to address the real-time phase transformation for Cr2AlC *** results demonstrated that increas-ing the temperature from 25 to 370 ℃ led to the structural transformation from amorphous Cr-Al-C to the crystalline Cr2Al ***,the high-purity Cr2AlC MAX phase was distinctly formed at 500 ℃,accompanied by the diminished amorphous *** the further increase of temperature to 650 ℃,the decomposition of Cr2AlC to Cr7C3 impurities was *** phase evolution was also evidenced by the Ab-initio molecular dynamics calculations,where the bond energy of Cr-Cr,Cr-Al,and Cr-C played the key role in the formed crystalline stability during the heating *** observa-tions not only provide fundamental insight into the phase formation mechanism for high-purity Cr2AlC coatings but also offer a promising strategy to manipulate the advanced MAX phase materials with high tolerance to high-temperature oxidation and heavy ion radiations.

关键词： Cr2AlC MAX phases In-situ heating transmission electron microscopy Phase formation Bond energy

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