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Study on the effect of metal sulfates on the reactivity of activated aluminum composites

International Journal of Hydrogen Energy 2025年 138卷 296-306页

作者： Yang, Guang Huo, Zheng Xin, Kai Cui, Yuanlu Xu, Guoxin Yang, Rongjie Zhang, Wenchao School of Materials Science and Engineering Beijing Institute of Technology Beijing100081 China

In this paper, aluminum composites with metal sulfates (sodium sulfate, iron sulfate, copper sulfate) and bismuth are prepared via ball milling to investigate the role of sulfates in influencing hydrolysis performance. Characterization is performed by scanning electron microscopy (SEM) and X-ray diffraction (XRD) to systematically investigate the hydrogen generation properties of the composites. Al–Bi–Na2SO4 exhibits excellent hydrolysis performance, with low activation energy, low corrosion potential, and high corrosion current density, achieving a maximum hydrogen generation rate of 46.7 mL/s·g. Furthermore, Al–Bi–Fe2(SO4)3 enhances activity by altering the microstructure and increasing the specific surface area. Although its hydrogen generation rate is moderate, it exhibits a high hydrogen conversion yield of 97.0 %. In contrast, Al–Bi–CuSO4 inhibits the hydrolysis reaction. Analysis of the hydrolysate reveals that flocculent precipitates form on the surface after the reaction begins, preventing further progress of the reaction. © 2025

关键词： Activation energy

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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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Revealing the exceptional cryogenic strength-ductility synergy of a solid solution 6063 alloy by in-situ EBSD experiments

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材料科学技术（英文版） 2025年第5期208卷 313-322页

作者： Youhong Peng Li Wang Chenglu Liu Chao Xu Lin Geng Guohua Fan School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China Key Laboratory for Light-weight Materials Nanjing Tech UniversityNanjing211816China

A solid solution 6063 aluminium alloy features an exceptional combination of strength and ductility at 77 ***,the deformation mechanisms responsible for superior strength-ductility synergy and excellent strain hardening capacity at a cryogenic temperature of the alloy were comparatively investigated by in-situ electron backscatter diffraction(EBSD)observations coupled with transmission electron microscopy(TEM)characterization and fracture morphologies at both 298 and 77 *** is found that kernel average misorientation(KAM)mappings and quantified KAM in degree suggest a higher proportion of geometri-cally necessary dislocations(GNDs)at 77 *** existence of orientation scatter partitions at 77 K implies the activation of multiple slip systems,which is consistent with the results of potential slip systems cal-culated by Taylor ***,dislocation tangles characterized by brief and curved dislocation cells and abundant small dimples have been observed at 77 *** temperature-mediated activation of dislo-cations facilitates the increased dislocations,thus enhancing the strain hardening capacity and ductility of the *** research enriches cryogenic deformation theory and provides valuable insights into the design of high-performance aluminium alloys that are suitable for cryogenic applications.

关键词： Aluminium alloy Cryogenic temperature Strength-ductility synergy In-situ EBSD Deformation mechanisms

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Improved oxygen electrocatalysis at Fe N_(4)and Co N_(4)sites via construction of axial coordination

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Chinese Chemical Letters 2025年第2期36卷 454-459页

作者： Ze Zhang Lei Yang Jin-Ru Liu Hao Hu Jian-Li Mi Chao Su Bei-Bei Xiao Zhi-Min Ao School of Energy and Power Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Institute for Computation in Molecular and Materials Science School of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094China Institute for Advanced Materials School of Materials Science and EngineeringJiangsu UniversityZhenjiang 212013China Advanced Interdisciplinary Institute of Environment and Ecology Beijing Normal UniversityZhuhai 519087China

The quest for efficient and durable catalysts using abundant resources has garnered significant interest in the field of bifunctional oxygen *** this contribution,we have designed a FeN_(4)or CoN_(4)embedded graphene-based bilayer as active layer and TMC_(3)or TMN_(3)doped graphene as supporting layer,named as FeN_(4)/TMC_(3)or FeN_(4)/TMN_(3)and CoN_(4)/TMC_(3)or CoN_(4)/TMN_(3),wherein TM strands for transition *** on density functional theory calculations,our results demonstrate that the interaction formed between dual metal atoms in the bilayer interspace leads to the coordination environment altered from flat four-coordination to spatial five-coordination,further stabilizing the bilayer structure and impairing its affinity toward the O-containing *** to thermodynamic analysis,the bilayers of CoN_(4)/CoN_(3),FeN_(4)/FeC_(3),FeN_(4)/CoC_(3),FeN_(4)/NiC_(3),FeN_(4)/ZnC_(3),FeN_(4)/FeN_(3),FeN_(4)/CrN_(3)and FeN_(4)/ZnN_(3)are attractively promising for bifunctional oxygen electrocatalysis due to the small overpotential differenceΔηbetween oxygen reduction and oxygen evolution that are less than 1 *** functional theory calculations combined with machine learning analysis directly identify the key role played by the interbinding formed between bilayers,that boosts catalytic activity,which establishes a predictable framework for a fast screen for graphene-based bilayer vertical *** work opens up a new path for designing the efficient electrocatalysts via modification of coordination environment.

关键词： Oxygen electrocatalysis Thermodynamic analysis Density functional theory Machine learning

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Cr doping modification for tribological behavior of Cr/a-C multilayer coatings against PEEK under diverse operational conditions

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Friction 2025年第3期13卷 117-126页

作者： Xiaohui Zhou Yingpeng Zhang Hao Li Li Cui Wei Yang Aiying Wang Peng Guo Peiling Ke 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 School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Considering the increasing demand for wearresistant materials used for various frictions with dynamic sealing parts,we employed hybrid magnetron sputtering technology to fabricate Cr/amorphous carbon(a-C)multilayered coatings with and without Cr doping for *** tribological behaviors of coatings paired with polyether ether ketone(PEEK)balls were investigated under different friction environments,including an evolving atmosphere,a NaCl solution,polyalphaolefin(PAO)oil,and water-in-oil(W/O).The results demonstrated that the tribological properties of all friction pairs were strongly influenced by the surrounding *** the atmosphere and in a NaCl solution,the addition of Cr promoted the formation of a-C-containing transfer films,thereby yielding stable and low friction ***,the dominant factor contributing to the tribological performance shifted from the coatings themselves to the PAO oil film with PAO *** the case of the W/O solution,both the facile reactivity of Cr and the intrinsic instability of the W/O mixture accelerated the presence of Cr_(2)O_(3),which caused more severe *** current observations not only identified the tribological failure mechanism of Cr/a-C coatings with and without Cr doping modifications in conjunction with their PEEK counterparts but also addressed the importance of designing and fabricating adaptive lubricant coatings for harsh multi-environment applications.

关键词： polyether ether ketone(PEEK) amorphous carbon polyalphaolefin(PAO)oil dynamic sealing tribo-chemistry

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Highly electrically conductive MOF/conducting polymer nanocomposites toward tunable electromagnetic wave absorption

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材料科学技术（英文版） 2025年第2期205卷 258-269页

作者： Xin Wu Peiyuan Kang Yinghan Zhang Haocheng Guo Shuoying Yang Qi Zheng Lianjun Wang Wan Jiang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials & College of Materials Science and Engineering Donghua UniversityShanghai 201620China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials & College of Materials Science and Engineering Donghua UniversityShanghai 201620China Engineering Research Center of Advanced Glasses Manufacturing Technology Ministry of EducationDonghua UniversityShanghai 201620China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials & College of Materials Science and Engineering Donghua UniversityShanghai 201620China Institute of Functional Materials Donghua UniversityShanghai 201620China

Metal-organic frameworks(MOFs)have attracted significant interest as self-templates and precursors for the synthesis of carbon-based composites aimed at electromagnetic wave(EMW)***,the utilization of high-temperature treatments has introduced uncertainties regarding the compositions and microstructures of resulting ***,complete carbonization has led to diminished yields of the produced carbon composites,significantly limiting their practical ***,the exploration of pristine MOF-based EMW absorbers presents an intriguing yet challenging endeavor,primarily due to inherently low electrical *** this study,we showcase the utilization of struc-turally robust Zr-MOFs as scaffolds to build highly conductive Zr-MOF/PPy composites via an inner-outer dual-modification approach,which involves the production of conducting polypyrrole(PPy)both within the confined nanoporous channels and the external surface of Zr-MOFs via post-synthetic *** interconnection of confined PPy and surface-lined PPy together leads to a consecutive and extensive conducting network to the maximum *** therefore entails outstanding conductivity up to～14.3 S cm-1 in Zr-MOF/PPy composites,which is approximately 1-2 orders of magnitude higher than that for conductive MOF nanocomposites constructed from either inner or outer *** from the strong and tunable conduction loss,as well as the induced dielectric polarization originated from the porous structures and MOF-polymer interfaces,Zr-MOF/PPy exhibits excellent microwave attenuation capabilities and a tunable absorption frequency ***,with only 15 wt.％loading,the mini-mum reflection loss(RLmin)can reach up to-67.4 dB,accompanied by an effective absorption bandwidth(EAB)extending to 6.74 ***,the microwave absorption characteristics can be tailored from the C-band to the Ku-band by adjusting the loading of *** work provide

关键词： Conductive mof nanocomposites Electromagnetic wave absorption MOF/conducting polymer Electrical conductivity Zr-MOF/PPy

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Effects of metal ion implantation(Fe,Ti,Zn and Zr)on mechanical properties,corrosion resistance and biocompatibility of WE43 Mg alloy

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Journal of Magnesium and Alloys 2025年第1期13卷 296-310页

作者： Lianhui Li Zhiqiang Zhang Dechuang Zhang Fugang Qi Yilong Dai Wenwen Wei Xiaoping Ouyang School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China Key Lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang 110819China Christian Doppler Laboratory for Interfaces and Precipitation Engineering CDL-IPE Institute of Materials Science and TechnologyTU Wien 1060Austria

To improve the corrosion resistance of biodegradable Mg alloys,WE43 alloys were implanted with Fe,Ti,Zn and Zr ions at the same implantation *** surface morphology,valence state of elements,nano-hardness(NH),elastic modulus(EM),degradation rate and in vitro cell experiments of the modified WE43 alloys were systematically studied.A modified layer composed of Mg,MgO,the implanted elements and their oxides was formed on the modified *** high-speed metal ions caused severe surface lattice damage,the surface hardness of the substrate considerable *** tests demonstrated a substantial enhancement in the corrosion resistance of the modified alloys via the implantation of Ti and Zr ions,resulting in a reduction of the corrosion current density to 88.1±9.9 and 15.6±11.4μA cm^(−2),respectively,compared with the implantation of Fe and Zn *** tests showed that the implantation of Fe,Ti,Zn and Zr ions enhanced the anticoagulant and hemolytic resistance of the WE43 *** surface-modified samples showed negligible cytotoxicity(0-1)at 12.5%extract ***,the alloys implanted with Fe,Ti and Zn ions significantly promoted proliferation of human umbilical vein endothelial cells(HUVEC)compared with the unmodified *** results demonstrate that Ti ion implantation is the best choice for WE43 alloy modification to achieve outstanding corrosion resistance and biocompatibility.

关键词： Biomaterial Ion implantation Surface mechanical properties Corrosion rate Biocompatibility

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Evidence of microstructural evolution linked to non-monotonic distribution of micromechanical properties induced by shot peening

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材料科学技术（英文版） 2025年第4期207卷 238-245页

作者： Guoxin Lu Qiang Wang Bonnie Attard Huhu Su Shijian Zheng Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationSchool of Materials Science and EngineeringShandong UniversityJinan250061China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material AECC Beijing Institute of Aeronautical MaterialsBeijing100095China Department of Metallurgy and Materials Engineering University of MaltaMSD2080Malta Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Materials Science and EngineeringHebei University of TechnologyTianjin300130China

The residual stress field induced by surface strengthening processes such as mechanical shot peening and other forms of plastic deformation does not generally exhibit a simple"monotonic"distribution *** researchers have analyzed this fact from a mechanical perspective based on Hertz ***,the micro/nano-scale microstructural changes corresponding to the distribution of residual stress fields still appear to be *** this study,we focused on a widely used material in aviation manufacturing,namely nickel-based superalloy GH4169,as our experimental *** subjected GH4169 alloy to me-chanical strengthening treatment using a shot peening intensity of 0.25 mmA,followed by quantitative testing of micromechanical performance indicators such as microhardness and residual *** thor-oughly investigate the relationship between micromechanical properties and microstructure changes,we utilized transmission electron microscopy(TEM)to observe and analyze shot-peened materials at differ-ent *** findings revealed that the most severe microstructural distortion induced by mechanical shot peening in GH4169 alloy was likely to occur within a depth range of 25 to 75 *** observation aligns with the actual phenomenon that the maximum microhardness and maximum residual compres-sive stress did not manifest on the outermost surface of the *** presenting a detailed analysis of deformation defects such as dislocations,stacking faults,and twinning in different depths of mechan-ically strengthened layers,our study contributes to a deeper understanding and practical application of post-processing technologies based on plastic deformation.

关键词： Mechanical shot peening Surface strengthening Residual stress Microstructure

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Measurements of Diffusion Coefficients in Liquid Alloys Using Two Measurement Points of In Situ X-Ray Fluorescence Analysis

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Defect and Diffusion Forum 2025年 439卷 127-138页

作者： Kobayashi, Yoshihiro Shiinoki, Masato Masaki, Tadahiko Suzuki, Shinsuke Department of Materials Science Waseda University Tokyo Japan Department of Applied Mechanics and Aerospace Engineering Waseda University Tokyo Japan Kagami Memorial Institute of Materials Science and Technology Waseda University Tokyo Japan Department of Materials Science and Engineering Shibaura Institute of Technology Tokyo Japan

This study aims to quantify the improvement in diffusion experiments in liquid alloys using two measurement points of in situ X-ray fluorescence analysis (in situ XRF). The impurity diffusion coefficient of Bi in liquid Sn at 573 K was measured by monitoring the temporal change in Bi concentration at two fixed points using in situ XRF. Two XRF measurement points were set in order to determine two unknown parameters corresponding to the diffusion coefficient and initial concentration at the measurement point immediately after complete melting. When only one measurement point was set for in situ XRF, the initial concentration was treated as a variable, and the obtained impurity diffusion coefficients of Bi deviated by 20%–30% from the reliable reference data. Using two measurement points for in situ XRF, the obtained impurity diffusion coefficient of Bi was (2.44±0.08)×10-9 m2 s-1, which agreed with the reference data obtained under microgravity and on the ground. © 2025 Trans Tech Publications Ltd, All Rights Reserved.

关键词： Bismuth alloys

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Highly conductive and stable iodine doped argyrodite electrolyte for all-solid-state lithium batteries

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Journal of Energy Chemistry 2025年第1期100卷 50-58页

作者： Gaozhan Liu Jing Zhang Jing Yang Jinghui Chen Xingyue Xiao Xiayin Yao Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Lithium argyrodites with high ionic conductivity and low cost are considered as one of the most prospective solid electrolytes for all-solid-state lithium ***,the poor chemical stability and compatibility with lithium metal limit their ***,Li_(5.4)PS_(4.4)Cl1.4I0.2solid electrolyte with high ionic conductivity of 11.49 m S ccm^(-1)and improved chemical stability is synthesized by iodine *** ultra-thin Li_(5.4)PS_(4.4)Cl_(1.4)I_(0.2)membrane with thickness of 10μm can be obtained by wet coating process,exhibiting a high ionic conductivity of 2.09 mS ccm^(-1)and low areal resistance of 1.17Ωcm^(-2).Moreover,iodine doping could in-situ form LiI at the lithium/electrolyte interface and improve the critical current density of Li_(5.4)PS_(4.4)Cl_(1.6)from 0.8 to 1.35 mA cm^(-2).The resultant LiCoO_(2)/Li_(5.4)PS_(4.4)Cl_(1.4)I_(0.2)/Li battery shows excellent cycling stability at 1 C,with a reversible specific capacity of 110.1 mA h g^(-1)and a retention of 80.5% after 1000 *** addition,the assembled LiCoO_(2)/Li_(5.4)PS_(4.4)Cl_(1.4)I_(0.2)membrane/Li pouch cell delivers an initial discharge capacity of 110.4 mA h g^(-1)and 80.5% capacity retention after 100 cycles.

关键词： Argyrodite electrolytes lodine doping lonic conductivity Stability All-solid-state lithium battery

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