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Mechanical and electrochemical properties of(MoNbTaTiZr)1-xNx high-entropy nitride coatings

材料科学技术（英文版） 2025年第5期208卷 78-91页

作者： Wei Yang Jianxiao Shen Zhenyu Wang Guanshui Ma Peiling Ke Aiying Wang Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

High-entropy materials possess high hardness and strong wear resistance,yet the key bottleneck for their practical applications is the poor corrosion resistance in harsh *** this work,the high-entropy nitride(HEN)coatings of(MoNbTaTiZr)1-xNx(x=0-0.47)were fabricated using a hybrid di-rect current magnetron sputtering *** research focus was dedicated to the effect of nitrogen content on the microstructure,mechanical and electrochemical *** results showed that the as-deposited coatings exhibited a typical body-centered cubic(BCC)structure without nitrogen,while the amorphous matrix with face-centered cubic(FCC)nanocrystalline grain was observed at x=*** increasing x in the range of 0.35-0.47 caused the appearance of polycrystalline FCC phase in *** with the MoNbTaTiZr metallic coating,the coating containing nitrogen favored the high hard-ness around 13.7-32.4 GPa,accompanied by excellent tolerance both against elastic and plastic ***,such N-containing coatings yielded a low corrosion current density of about 10-8-10-7 A/cm2 and high electrochemical impedance of 106 Ω cm2 in 3.5 wt.％NaCl solution,indicating the supe-rior corrosion *** reason for the enhanced electrochemical behavior could be ascribed to the spontaneous formation of protective passive layers over the coating surface,which consisted of the domi-nated multi-elemental oxides in chemical ***,noted that the(MoNbTaTiZr)0.83N0.17 coat-ing displayed the highest hardness of 32.4±2.6 GPa and H/E ratio at 0.09,together with remarkable cor-rosion resistance,proposing the strongest capability for harsh-environmental applications required both good anti-wear and anti-corrosion performance.

关键词： High-entropy nitride Magnetron sputtering Microstructure Mechanical property Corrosion behavior

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Tuning surface reactivity towards high-performance hard carbon in Li/Na/K-ion batteries

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Journal of Energy Chemistry 2025年第4期103卷 27-36页

作者： Wang Zhou Dan Wang Ying Mo Rui Tang Peng Gao Miaomiao Han Shi Chen Keigo Wakabayashi Takeharu Yoshii Hirotomo Nishihara Jilei Liu College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology of Clean Energy Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan University The Key Laboratory of Micro-nano Energy Materials and Application Technologies University of Hunan Province & College of Physics and Electronic Engineering Hengyang Normal University Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau Institute of Multidisciplinary Research for Advanced Materials Tohoku University Advanced Institute for Materials Research (WPI-AIMR) Tohoku University

Controlling surface chemistry is critically important for improving the initial Coulombic efficiency(ICE)and adsorption capacity of hard carbon anode used in Li/Na/K-ion ***,accurately identifying the types and concentrations of hydrogen/oxygen terminated functional groups(HTFG/OTFGs) and distinguishing their functionalities remain ***,we quantitatively investigated the surface chemistry on hard carbon via ultra-high temperature programed desorption measurements,and uncovered the role of HTFG/OTFGs in influencing ICE and adsorption capacity in Li/Na/K-ions *** C-H group is found to be dominant species on the surface of hard carbon,and presents a positive correlation with ICE values and adsorption *** low reactivity of C-H group with both electrolyte salt and solvent results in the formation of thinner and highly conducive solid electrolyte interphase(SEI) layer,which benefit for the enhanced ICE and improved Li/Na/K-ions diffusion across SEI ***,the pimping trapping effect of C-H groups allows the adsorbed Li/Na/K-ions to migrate into graphitic interlayer quickly,enhancing the slope *** fabricating a C-H group-rich surface chemistry on hard carbon,a high ICE value and satisfactory specific capacity have been *** findings enrich our understanding of the surface chemistry-induced interfacial reaction,which effectively guides the rational design of high-performance hard carbon.

关键词： Adsorption capacity C–H bond Hard carbon Initial coulombic efficiency Surface chemistry

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Co@C-N as an electronic mediator anchored with Cu2O nanoparticles enables efficient photoreduction of CO2 to CO with nearly 100% selectivity

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science China Chemistry 2025年第5期68卷 2160-2169页

作者： Xingbin Pan Xiuzheng Deng Jingshan Fan Jiangchuan Liu Changhai Liu Zhongyu Li Qian Liang Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology CNPC-CZU Innovation AllianceSchool of Petrochemical EngineeringChangzhou University School of Materials Science & Engineering Changzhou University

Solar-driven CO2conversion into value-added chemical provides an attractive strategy for sustainable ***,the enhanced CO2photoreduction performance with target product selectivity remains a major ***,we develop a novel strategy involving Cu2O nanoparticles in situ grown on the surface of ZIF-67-derived Co@C-N nanocages（CC） to create abundant active sites and appropriate heterointerfaces.A remarkable CO selectivity of 95.7% with a yield of 117.39 μmol g-1h-1and an apparent quantum efficiency as high as 1.88% at 420 nm was obtained over CC-60 catalyst in pure water,which was 87.6 times higher than that of pure *** calculations and experiments indicated that Co@C-N nanocages as charge mediator not only rapidly trap photogenerated electrons to promote charge separation efficiency,but also regulate the d-band center of Cu atoms to move to the Fermi energy level,thereby optimizing the reaction kinetics to facilitate the highly selective conversion of the key intermediate*CO desorption to CO.

关键词： Co nanocage electronic mediator interface regulation photocatalytic CO2 reduction high selectivity

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Excellent high-temperature strength of(HfZrTiTaNb)C high-entropy carbide diffusion-bonded joint via in-situ alloying of Ni/Nb/Ni composite interlayer

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Journal of advanced Ceramics 2025年第1期14卷 127-133,136-139页

作者： Ruijie Mu Ying Wang Shiyu Niu Kongbo Sun Zhenwen Yang Tianjin Key Laboratory of Advanced Joining Technology School of Materials Science and EngineeringTianjin UniversityTianjin 300350China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjin 300350China

To obtain high-entropy carbide(HEC)joints with excellent high-temperature performance,a(HfZrTiTaNb)C HEC joint featuring a direct diffusion-bonded interface with a Nb-based interlayer was successfully fabricated at relatively low temperatures of 1150–1250℃for 60 min under 10 *** from a modified Ni/Nb/Ni composite interlayer with a Nb content of>64 at%,an alloyed Nb_(2)Ni layer was constructed in situ by accelerating the directional diffusion of Ni atoms from the high-entropy interface into the remaining pure Nb through the Ni‒Nb eutectic ***,the excess liquid phase was squeezed out of the bonding region,ensuring the absence of Ni-based *** the intrinsic interfacial stability and sluggish diffusion effect,the HEC with its original lattice structure,was capable of developing diffusion bonding with the Nb_(2)Ni layer instead of interacting with the liquid *** high reliability of the HEC/Nb_(2)Ni bonded interface was confirmed by the coherence of(11¯3)_(HEC)//(141)_(Nb_(2))Ni and a calculated lattice misfit of *** HEC joint had a high room-temperature strength of 174 MPa because of the homogenous Nb_(2)Ni layer,which exhibited nanohardness(15.2±1.5 GPa)and an elastic modulus of 219.9±17.5 ***,the strength of the HEC joint did not decrease at 1000℃,increasing by~49%over that of HEC/Ni/HEC diffusion-bonded joints,which have stringent surface flatness *** suggested that the HEC/Nb_(2)Ni interface had excellent resistance to high-temperature softening,even though it was invariably the initial failure *** work is informative for designing bonding structures and preparing HEC components.

关键词： high-entropyceramic diffusion bonding in situ alloyed interlayer mechanical properties

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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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Fabrication of balanced optical and photocatalytic self-cleaning ARCs by embedding nano TiO₂ particles on the surface of closed-pore silica coatings

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Ceramics International 2025年第14期51卷 19682-19692页

作者： Fang, Ze Chen, Qing Yuan, Junjie Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education School of Materials Science and Engineering Tongji University Shanghai201804 China

Due to their photocatalytic self-cleaning properties, titania modified antireflective coatings (ARCs) on photovoltaic glass have become a research hotspot. However, balancing the optical properties, photocatalytic performance, weather resistance, and process complexity of composite nanocoating remains a challenge. In this work, anatase-type nano TiO2 with an initial particle size of 5 nm was embedded on the surface of closed-pore antireflective coatings (CPARCs) through a layer-by-layer dip-coating method to prepare multifunctional antireflective coatings that perfectly solved the above problems. SEM results demonstrated that the nano TiO2 modified CPARCs had the desired closed-pore structure and nano TiO2 particles were well dispersed on the surface of the CPARCs. Si-O-Ti chemical bonds were formed between the nano TiO2 and the silica on the coating surface during the calcination process which was confirmed by FT-IR and depth-etched XPS, indicating a robust connection. The TiO2 modified double-layered CPARCs can effectively balance the absorption and reflection of light caused by TiO2, and the optical properties were even better than that of CPARCs. Compared with bare glass, the average transmittance in the wavelength ranges of 400–700 nm and 400–1100 nm is 97.53% and 95.86%, respectively. The gain effects were 6.76% and 6.05%, respectively. Furthermore, the photocatalytic performance of the coatings was proven to be better than that of the coatings in which nano TiO2 was directly mixed into the system. In addition, atomic force microscopy (AFM) observation showed that the roughness of the coatings increased after TiO2 was embedded onto the surface of the coatings, reducing the contact angle from 24.2° to 6.2°, which can be reduced to 3.6° after ultraviolet irradiation, achieving a superhydrophilic effect. The TiO2 modified CPARCs also exhibited excellent abrasion resistance and weather durability. This is a new, simple, and efficient way to prepare TiO₂ modified a

关键词： Titanium dioxide

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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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A hierarchical NiFeOOH@CeO_(2−x)nanosheets array boosts electrocatalytic activity and durability at high current densities for water oxidation

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Nano Research 2025年第3期18卷 204-214页

作者： Wei Zhang Liyang Xiao Xiaorui Huang Chunyan Han Ying Liu Jingtong Zhang Haiwen Tan Rui Zhang Pengfei Yin Cunku Dong Hui Liu Xiwen Du Jing Yang Institute of New Energy Materials Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationSchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China

The oxygen evolution reaction(OER)reaction kinetics of nickel-iron(oxy)hydroxides(NiFeOOH)is limited by their weak adsorption of OER ***,a hierarchical NiFeOOH@CeO_(2−x)nanosheets array was in situ grown on a nickel foam by a facile laser direct writing method,which exhibits superior OER activity and durability at high current densities in alkaline *** hierarchical nanosheets array exposes abundant catalytic active sites,which greatly promote OER reaction *** strong electronic interaction at the NiFeOOH/CeO_(2−x)interface leads to favorable electron transfer from Ni^(2+)/^(3+)and Fe^(3+)to Ce^(3+)/^(4+).The Ni sites with high valences show enhanced OH−adsorption and also promote the formation of*OOH intermediate,thereby greatly improving OER intrinsic *** oxygen deficient CeO_(2−x)primary sheets guarantee good electrical *** a well-designed catalytic electrode requires overpotentials of only 229 and 287 mV to achieve current densities of 50 and 500 mA·cm^(−2),respectively,and sustains superior stability at 500 mA·cm^(−2)and 1 A·cm^(−2).

关键词： hierarchical nanosheets transition metal(oxy)hydroxides oxygen evolution reaction laser direct writing water splitting

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Characterization, Mechanical Property, Degradation Behavior, and Osteogenic Activity of Zn-Mn Alloy Foam Prepared by Electrodeposition

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Acta Metallurgica Sinica (English Letters) 2025年 1-17页

作者： Wang, Tiantian Liu, Lin Liu, Zexin Wang, Kang Yao, Runhua Yao, Xiaohong Hang, Ruiqiang Shanxi Key Laboratory of Biomedical Metal Materials College of Materials Science and Engineering Taiyuan University of Technology Taiyuan030024 China Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of Education Taiyuan University of Technology Taiyuan030024 China

Zinc (Zn)-based materials show broad application prospects for bone repair due to their biodegradability and good biocompatibility. In particular, Zn metal foam has unique interconnected pore structure that facilitates inward growth of new bone tissue, making it ideal candidates for orthopedic implants. However, pure Zn metal foam shows poor mechanical property, high degradation rate, and unsatisfactory osteogenic activity. Herein, Zinc-manganese (Zn-Mn) alloy foams were electrodeposited in Zn and Mn-containing electrolytes to overcome the concerns. The results showed that Mn could be incorporated into the foams in the form of MnZn13. Zn-Mn alloy foams showed better mechanical property and osteogenic activity as well as moderate degradation rate when compared with pure Zn metal foam. In addition, these properties could also be regulated by preparation process. The peak stress and osteogenic activity increased with deposition current (0.3‒0.5 A) and electrolyte pH (3‒5), but decreased with electrolyte temperature (20‒40 °C), while the degradation rate exhibited opposite tendency, which suggests high deposition current and electrolyte pH and low electrolyte temperature can fabricate Zn-Mn alloy foam with favorable mechanical property, moderate degradation rate, and osteogenic activity. These findings provide a valuable reference for the design and fabrication of novel Zn-based biodegradable materials. © The Chinese Society for Metals (CSM) and Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Machinability

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An unexpected vortex field by twist

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science China materials 2025年第5期68卷 1680-1681页

作者： Yunhao Lu School of Physics Zhejiang University State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science & EngineeringZhejiang University

Due to their reduced dimensionality and strong quantum confinement, two-dimensional (2D) materials have emerged as a versatile platform for exploring quantum phenomena absent in their bulk counterparts. Stacking 2D materials to form bilayer heterostructures or homostructures introduces additional degrees of freedom to tune or even create novel quantum properties [1].

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