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Science China materials 2025年

作者：赵文英杨雄肖宇轩余菲田歌沈凌卢毅耿伟吴思明应杰 Ion Tiginyanu Kenneth I. Ozoemena 阳晓宇 State Key Laboratory of Silicate Materials for Architectures & State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Chemistry Chemical Engineering and Life Sciences & Laoshan Laboratory & School of Materials Science and Engineering & International School of Materials Science and Engineering Wuhan University of Technology School of Chemical Engineering and Technology Sun Yat-sen University National Center for Materials Study and Testing Technical University of Moldova Molecular Sciences Institute School of Chemistry University of the Witwatersrand National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory

Cl-吸附及腐蚀效应是Pt基催化剂在海水析氢反应（HER）中性能的主要障碍.虽然引入羟基是提升HER动力学和缓解氯毒化的有效策略,但在Pt基催化剂体系中实现这一策略仍具挑战性.本研究通过高温还原法制备了具有Ni空位（路易斯酸位点）的PtN...

Cl-吸附及腐蚀效应是Pt基催化剂在海水析氢反应（HER）中性能的主要障碍.虽然引入羟基是提升HER动力学和缓解氯毒化的有效策略,但在Pt基催化剂体系中实现这一策略仍具挑战性.本研究通过高温还原法制备了具有Ni空位（路易斯酸位点）的PtNi合金纳米颗粒.路易斯酸位点促进Ni-LDH载体上晶格羟基向表面羟基的转化.Ni-LDH的晶格羟基通过与路易斯酸位点相互作用,产生表面羟基并协同提升其表面亲水性.这种双功能特性既能促进水分子吸附,又可抑制Cl-吸附.优化后的PtNi/Ni-LDH在碱性真实海水中展现出优异的HER性能,仅需1 9 mV过电位即可达到1 0 mA cm-2电流密度,塔菲尔斜率为31 mV dec-1,并在100小时耐久性测试中具有优异的稳定性.该研究为通过定向羟基工程设计高效海水裂解催化剂提供了理论基础.

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Nanowires in composite solid-state electrolytes: synthesis, structures and applications

Nano Trends

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Nano Trends 2024年 7卷

作者： Dong, Guangyao Zhang, Hong Cheng, Yu Xu, Lin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China Hubei Longzhong Laboratory Wuhan University of Technology (Xiangyang Demonstration Zone) Hubei Xiangyang 441000 China Hainan Institute Wuhan University of Technology Sanya 572000 China

Solid-state electrolytes (SSEs) are regarded as crucial materials, thus determining the comprehensive properties of solid-state lithium batteries (SSLBs). However, the existing issues of ion transport and interface limit their further development and application. As the inorganic solid-state electrolytes (ISEs) and polymer solid-state electrolytes (PSEs) both present obvious advantages and defects, the strategy of preparing composite solid-state electrolytes (CSEs) by incorporating inorganic components in polymer matrix is considered an effective way to overcome the above-mentioned problems. Nanowires with high aspect ratios are widely used in CSEs. Moreover, nanowires can not only effectively enhance the mechanical properties and ion transport efficiency of SSEs, but also boost the contact between electrolyte and electrode interface, thereby improving the cycle stability and safety of SSLBs. This review systematically categorized nanowires according to their morphology, function, and Li⁺ conductivity, and discussed their structural properties and synthesis strategies in detail. Moreover, application examples and mechanisms of nanowires in different polymer matrices are also introduced. In the summary and prospect section, we anticipate the existing challenges and future objectives of nanowires in the future research of CSEs. © 2024 The Authors

关键词： Composite solid-state electrolytes Inorganic fillers Nanowires Polymer matrix Solid-state lithium batteries

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Interlocking Strategy Confined in Multifunctional Rubber-Based Composites for Boosting Anti-Corrosion and Electromagnetic Interference Shielding

SSRN

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SSRN 2025年

作者： Sun, Jiahao Chen, Jianing Gao, Zhenliang Li, Yang Liu, Chuntai Li, Muhe Liu, Xianhu Shen, Changyu State Key Laboratory of Structural Analysis Optimization and CAE Software for Industrial Equipment National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou University Zhengzhou450002 China College of Material Science and Engineering Zhengzhou University Zhengzhou450001 China Zhengzhou University China

Addressing the corrosion issues arising from incorporating highly conductive fillers into the rubber matrix remains a significant challenge, particularly in the harsh marine corrosion environment and under the threat of early warning radar detection. Inspired by the principles of interface engineering in composites, an interlocking strategy for regulating the multiple interfacial interactions (including dipole-dipole, electrostatic and chemical bonding) between methyl vinyl silicone rubber (VMQ) and metal nanoparticles is proposed. This modification facilitates molecular conformational transformation and ordering within the VMQ-based composite, thereby inducing stable dipole distribution of silicone rubber at the composite interface. Consequently, this significantly enhanced the crosslinking degree of rubber vulcanization and interfacial adhesion between the filler and matrix. Compared to conventional rubber-based composites, the engineered VMQ/Ag@Al/ MWCNTs composite maintained an electromagnetic interference (EMI) shielding effectiveness exceeding 100 dB after a 240-hour copper accelerated salt spray (CASS) test. Furthermore, the modified rubber matrix composite exhibits a breaking strength of 2.5 MPa and an elongation at break of 120%, significantly higher than that of pure silicone rubber with a breaking strength of only 0.43 MPa. Additionally, the VMQ/Ag@Al/MWCNTs composite avoids a series of issues, including complex molecular orientation, interface instability, and performance degradation due to structural relaxation following 240-hour post-treatments such as ultraviolet aging, and high temperature and humidity. The findings offer a novel approach for multi-scale interface control, enhancing the performance and functional applications of rubber matrix composites. © 2025, The Authors. All rights reserved.

关键词： Seawater corrosion

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In-situ microstructural investigations of the TRIP-to-TWIP evolution in Ti-Mo-Zr alloys as a function of Zr concentration

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Journal of materials Science & technology 2021年第6期65卷 228-237页

作者： Bingnan Qian Jinyong Zhang Yangyang Fu Fan Sun Yuan Wu Jun Cheng Philippe Vermaut Frederic Prima Chimie ParisTech PSL UniversityCNRSInstitut de Recherche de Chimie Paris75005 PahsFrance School of Material Science and Engineering China University of Mining and TechnologyXuzhou Jiangsu 221008China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'anShaanxi 710072China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Northwest Institute for Non-ferrous Metal Research Shaanxi Key Laboratory of Biomedical Metal MaterialsXi'an 710016China Sorbonne Universities UPMC University ParisUFR92675005 ParisFrance

Aiming at overcoming the strength-ductility trade-off in structural Ti-alloys,a new family of TRIP/TWIP Ti-alloys was developed in the past decade(TWIP:twinning-induced plasticity;TRIP:transformationinduced plasticity).Herein,we study the tunable nature of deformation mechanisms with various TWIP and TRIP contributions by fine adjustment of the Zr content on ternary Ti-12 Mo-xZr(x=3,6,10)*** microstructure and deformation mechanisms of the Ti-Mo-Zr alloys are explored by using in-situ electron backscatter diffraction(EBSD)and transmission electron microscopy(TEM).The results show that a transition of the dominant deformation mode occurred,going from TRIP to TWIP major mechanism with increasing Zr *** the Ti-12 Mo-3 Zr alloy,the stress-induced martensitic transformation(SIM)is the major deformation mode which accommodates the plastic *** the Ti-12 Mo-6 Zr alloy,the combined deformation twinning(DT)and SIM modes both contribute to the overall plasticity with enhanced strain-hardening rate and subsequent large uniform *** increase of the Zr content in Ti-12 Mo-10 Zr alloy leads to an improved yield stress involving single DT mode as a dominant deformation mechanism throughout the plastic *** the present work,a set of comprehensive in-situ and ex-situ microstructural investigations clarify the evolution of deformation microstructures during tensile loading and unloading processes.

关键词： Metastable beta(β)Ti-alloys TRIP/TWIP effects Deformation mechanisms In-situ traction-EBSD TEM observation

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Hierarchically Porous Few-Layer Carbon Nitride and Its High H+Selectivity for Efficient Photocatalytic Seawater Splitting

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Nano Letters 2023年第10期23卷 4390-4398页

作者： Shi-Tian Xiao Rui Yin Lu Wu Si-Ming Wu Ge Tian Menny Shalom Li-Ying Wang Yi-Tian Wang Fu-Fei Pu Hannah-Noa Barad Fazhou Wang Xiao-Yu Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & State Key Laboratory of Silicate Materials for Architectures & Shenzhen Research Institute Wuhan University of Technology Wuhan 430070 China Key Laboratory for the Synthesis and Application of Organic Functional Molecules Ministry of Education College of Chemistry and Chemical Engineering Hubei University Wuhan 430062 China Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology Ben-Gurion University of the Negev Beer-Sheva 8410501 Israel State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in Wuhan Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430071 China Department of Chemistry Institute of Nanotechnology & Advanced Materials Bar Ilan University Ramat Gan 5290002 Israel

Photocatalysts for seawater splitting are severely restricted because of the presence of multiple types of ions in seawater that cause corrosion and deactivation. As a result, new materials that promote adsorption of H+and hinder competing adsorption of metal cations should enhance utilization of photogenerated electrons on the catalyst surface for efficient H2production. One strategy to design advanced photocatalysts involves introduction of hierarchical porous structures that enable fast mass transfer and creation of defect sites that promote selective hydrogen ion adsorption. Herein, we used a facile calcination method to fabricate the macro–mesoporous C3N4derivative, VN-HCN, that contains multiple nitrogen vacancies. We demonstrated that VN-HCN has enhanced corrosion resistance and elevated photocatalytic H2production performance in seawater. Experimental results and theoretical calculations reveal that enhanced mass and carrier transfer and selective adsorption of hydrogen ions are key features of VN-HCN that lead to its high seawater splitting activity.

关键词： Adsorption Defects in solids Ions Nitrogen Seawater

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External field-assisted catalysis

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eScience 2025年

作者： Linbo Jiang Lintao Jiang Xu Luo Ruidong Li Qingqu Zhou Weihao Zeng Jun Yu Lei Chen Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070 China

In recent years, substantial effort has been dedicated to improving the intrinsic catalytic activity of catalysts through structural modification, component regulation, and chemical state optimization. However, complexity in the design and construction of catalysts, and the possibility of encountering performance ceilings, may constrain their widespread use. Currently, the introduction of in situ external fields, such as force, electric, magnetic, acoustic, light, and thermal fields, is an attractive approach to enhance the catalytic efficiency of catalysts. Such in situ physical fields feature continuity, reversibility, and controllability, and can exert external force or energy on catalysts, thereby affecting their microscopic structures and electron arrangements, accelerating their mass transfer and reaction kinetics. Mutual coupling and conversion among different external fields are also worth exploring. Various in situ external field effects work in multifaceted ways to promote catalysis in energy-environment systems by optimizing mass/energy transfer processes, modifying structures, and accelerating catalytic reaction kinetics, thereby significantly improving the catalytic properties of materials. This review summarizes and analyzes the latest developments in external field-assisted methods for boosting catalyst performance. The external field effect, related catalysis mechanism, and external field-enhanced catalysis are highlighted, and we discuss future challenges, countermeasures, and opportunities for external field-assisted catalysis and beyond.

关键词： Catalysis External field Field-assisted effects Reaction mechanism

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Energetic Mof-Derived Hollow Carbon Tubes with Interconnected Channels and Encapsulated Nickel-Cobalt Alloy Sites as Bifunctional Catalysts for Zn–Air Batteries with Stable Cycling Over 600 Cycles

SSRN

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SSRN 2022年

作者： Duan, Xin-De Zhu, Jia-Wei Zheng, He-Gen State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Collaborative Innovation Center of Advanced Microstructures Nanjing University Jiangsu Nanjing210023 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China

Energetic metal–organic frameworks (EMOFs) and EMOF-derived materials are currently a hot spot to replace precious-metal electrocatalysts. Here, the reasonable strategy and synthesis of an inventive class of alloy@C materials from EMOFs via one-step pyrolysis is reported as the first example. The freshly progressive NiCo@C with a individual hierarchical structure, being composed of uniformly distributive metal alloy nanoparticles (MANPs) decorated by N-doped porous hollow carbon nanotubes (HCNTs), displays extraordinary bifunctional catalytic activities for oxygen reduction and oxygen evolution reactions (ORR and OER) than that of commercial precious-metal catalysts. Experimental characterizations and theoretical calculations reveal the vital role of Ni-Co alloy doping in adjusting both performances. Moreover, as an air electrode in Zn–air batteries, NiCo@C demonstrates a large peak power density of 170 mW cm−2 and superior long-term stability over 600 cycles. In consideration of the expansive category of EMOFs and the governable fixation of single/multiple metal particles, this strategy gives evidence of a capacious scientific range. © 2022, The Authors. All rights reserved.

关键词： Nickel alloys

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Improvement of Sic Deposition Uniformity in Cvd Reactor by Showerhead with Baffle

SSRN

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SSRN 2023年

作者： Li, Qizhong Zhang, Yixuan Ji, Baifeng Zhang, Song Tu, Rong Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Civil Engineering and Architecture Wuhan University of Technology Wuhan430070 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City Guangdong Zhongshan528400 China

The deposition rate distribution during halide chemical vapour deposition of silicon carbide (SiC) is influenced by equipment structure, and a uniform film can be obtained by optimising the chamber structure. A detailed chemical reaction mechanism was incorporated into a reaction chamber model to verify the SiC deposition kinetics model. We studied the influence of spray hole size, baffle size, and baffle positioning on the deposition rate uniformity. The results show that reducing the size of the spray holes leads to a "double peak" in the deposition rate across the substrate from the edge to both sides, which first increases and then decreases. The "double peak" disappears when the spray hole size is reduced. With an increase in baffle size, the uniformity of the deposition rate first increased and then decreased. Moreover, the baffle displacement had little effect on the deposition rate when the baffle-to-spray plate distance was at least 45 mm. Meanwhile, the deposition uniformity gradually worsened when the baffle distance was reduced. The spray plate and baffle reduced the extreme difference in deposition rates across the effective deposition area by improving the velocity field of the reaction chamber. A uniform SiC film can be obtained using the proposed optimisation method. © 2023, The Authors. All rights reserved.

关键词： Structural optimization

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Controllable preparation and microwave absorption properties of shape anisotropic Fe_(3)O_(4) nanobelts

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Journal of Materiomics 2021年第5期7卷 957-966页

作者： Jialiang Pan Rujing Zhang Jun Ling Min Wang Zechen Li Zhen Zhen Limin He Hongwei Zhu State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China The First Scientific Research Institute of Wuxi Wuxi214035JiangsuChina Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material AECC Beijing Institute of Aeronautical MaterialsBeijing100095China

To substantially prevent electromagnetic threatens,microwave absorbing materials(MAMs)are required to eliminate surplus electromagnetic *** a typical MAM,Fe_(3)O_(4) particles with complex permittivity and permeability have been widely applied due to the coexistence of magnetic loss and dielectric ***,the necessary high mass fraction significantly limited its applications,thus Fe_(3)O_(4) nanostructures have been extensively investigated to overcome this *** this work,uniform Fe_(3)O_(4) nanobelts were prepared by electrospinning and two-step thermal *** controlling the composition and viscosity of the electrospinning precursor solution,Fe_(3)O_(4) nanobelts with tunable lateral sizes(200 nme1 mm)were *** samples with low content(only 16.7 wt%)Fe_(3)O_(4) exhibited wide maximum effective absorbing bandwidths(EAB)over 3 GHz,and Fe_(3)O_(4) nanobelts with smaller lateral sizes showed a maximum EAB of 4.93 ***,Fe_(3)O_(4) nanobelts with smaller lateral sizes presented superior reflection loss properties,the lowest reflection loss reached-53.93 dB at 10.10 GHz,while the maximum EAB was up to 2.98 *** excellent microwave reflection loss of Fe_(3)O_(4) nanobelts was contributed to the enhanced synergistic effect of magnetic loss,dielectric loss,and impedance matching,originated from the hierarchically cross-linked networks and shape *** study could broaden the practical applications of magnetic absorbers,and provided an approach for the development of shape anisotropic magnetic materials.

关键词： Fe_(3)O_(4) Nanobelts Shape anisotropy Microwave absorption Reflection loss

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Activating lattice oxygen of two-dimensional MnXn-1O2 MXenes via zero-dimensional graphene quantum dots for water oxidation

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Science China materials 2022年第11期65卷 3053-3061页

作者： Yiyuan Ma Yurong An Zhuo Xu Laifei Cheng Wenyu Yuan Science and Technology on Thermostructural Composite Materials Laboratory School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China State Key Laboratory of Solidification Processing School of Material Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy TechnologyInstitute for Advanced Energy MaterialsSchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119China Key Laboratory of Macromolecular Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid ChemistrySchool of Chemistry&Chemical EngineeringShaanxi Normal UniversityXi’an 710062China

The poor oxygen evolution reaction(OER)activity of two-dimensional(2 D)transition metal carbides(MXenes)is a major obstacle to their application in highperformance water splitting and fuel cells due to the high energy barriers for the absorption of ***,we demonstrate that the lattice oxygen of M_(n)X_(n-1)O_(2)MXenes can be activated by 0 D graphene quantum dots(GQDs),thereby activating the OER via the lattice-oxygen oxidation mechanism(LOM)instead of the conventional adsorbate evolving *** pH-dependent OER activity of M_(n)X_(n-1)O_(2)@GQDs and ^(18)O isotope-labelling experiments with time-of-flight secondary-ion mass spectrometry(TOF-SIMS)provide the direct evidence of ***,the activated lattice oxygen amount can be controlled by the *** as-prepared 0 D/2 D Ti_(3)C_(2)O_(2)@GQDs heterostructure delivers a highly reduced overpotential of 390 mV(bare Ti_(3)C_(2)O_(2):530 mV)at a benchmark current density of 10 mA cm^(-2).Through optimizing the thickness and the additional conductive substrate,the overpotential at 10 mA cm^(-2)decreases to 250 mV,while the Tafel slope is reduced to 39 mV dec^(-1);these values indicate the as-prepared heterostructure is superior to the state-of-the-art MXene-based OER *** work provides a new strategy to enhance the OER activity of M_(n)X_(n-1)O_(2)and extends the application of LOM from perovskite to MXenes.

关键词： graphene quantum dots lattice-oxygen activation oxygen evolution reaction water splitting heterostructure

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