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Layered Metastable Cobalt Oxide with Self-Healing Properties for Enhanced Stability in Oxygen Evolution Reactions

ACS Applied Energy Materials 2025年第12期8卷 8311-8319页

作者： Diandian Lv Dongdong Gao Penghao Li Jinzeng Guo Ziliang Chen Zhenhui Kang Fan Liao Mingwang Shao Institute of Functional Nano and Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices Soochow University 199 Ren’ai Road Suzhou 215123 Jiangsu China Institute of Functional Nano and Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices Soochow University 199 Ren’ai Road Suzhou 215123 Jiangsu China；Macao Institute of Materials Science and Engineering (MIMSE) MUST-SUDA Joint Research Center for Advanced Functional Materials Macau University of Science and Technology Taipa 999078 Macao SAR China Institute of Functional Nano and Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices Soochow University 199 Ren’ai Road Suzhou 215123 Jiangsu China；Shangqi Photoelectric Co. Ltd. 2998 Taidong Road Suzhou 215100 Jiangsu China

The development of durable oxygen evolution reaction (OER) catalysts is critical for improving energy storage and conversion systems. The challenge of active site deactivation during a prolonged electrochemical operation necessitates innovative solutions. Self-healing mechanisms have emerged as a compelling approach to boost the long-term stability of the OER catalysts. Two-dimensional structure catalysts, which offer vast surface areas, can enhance the mass transfer efficiency and expedite reaction kinetics, thus promoting self-repair processes. Here, we synthesized a layered quasi-nevskite metastable-phase cobalt oxide (LQNMP-Co2O3) using a molten-alkali method and investigated its self-healing behaviors during the OER electrocatalytic process. In a Co2+-containing borate buffer solution (KBi, pH = 14), the overpotential decreased by 9 mV after 5000 cyclic voltammetry cycles. The catalyst demonstrated remarkable stability over 200 h at a current density of 10 mA cm–2, after which it exhibited further overpotential reductions. This study marks the first demonstration of self-healing properties in cubic phase cobalt oxides and underscores the potential of metastable-phase materials in advancing the efficacy of OER catalysts for energy systems.

关键词： oxygen evolution reaction self-healing behavior cobalt oxide two-dimensional metastable-phase

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Local chemical heterogeneity enabled superior zero thermal expansion in nonstoichiometric pyrochlore magnets

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National science Review 2025年第3期12卷 252-261页

作者： Yanming Sun Ruohan Yu Sergii Khmelevskyi Kenichi Kato Yili Cao Shixin Hu Maxim Avdeev Chin-Wei Wang Chengyi Yu Qiang Li Kun Lin Xiaojun Kuang Xianran Xing Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Solid State Chemistry Department of Physical Chemistry University of Science and Technology Beijing The Sanya Science and Education Innovation Park of Wuhan University of Technology Vienna Scientific Cluster Research Center Technical University of Vienna RIKEN SPring-8 Center Institute of Applied Magnetics Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou University Australian Nuclear Science and Technology Organisation School of Chemistry The University of Sydney Neutron Group Synchrotron Radiation Research Center Guangxi Key Laboratory of Electrochemical and magnetochemical Functional Materials College of Chemistry and Bioengineering Guilin University of Technology

The design of zero thermal expansion（ZTE） materials is urgently required as dimension-stable components in widespread modern high-precision technologies. Local chemical order has been of great importance in engineering advanced inorganic materials, but its role in optimizing the ZTE is often overlooked. Herein, we propose local composition heterogeneity for developing superior ZTE via a nonstoichiometric strategy. A remarkably low coefficient of thermal expansion of αa= +1.07 × 10-6K-1is achieved from 3 to 440 K in a quaternary Zr-Nb-Fe-Co pyrochlore magnet, which is the widest temperature range among known cubic ZTE metals. High-resolution synchrotron X-ray diffraction and magnetization measurements reveal that all the Bragg peaks split as resulting from two cubic phases with different magnetic orders. Scanning transmission electron microscopy, M?ssbauer spectroscopy and theoretical calculations indicate that such phase separation intimately derives from excess Co dopant preferentially clustering on the Fe pyrochlore-lattice（16d） and simultaneously yielding an antisite Fe on Zr/Nb sublattice（8a）. The Co content in pyrochlore-lattice has weaker exchange interactions than that of Fe, but the antisite Fe introduces extra positive exchange interactions between 8a and 16d sites. Local composition fluctuation of Co and Fe thus affects the interplanar ferromagnetic order of pyrochlore-lattice and balances the normal phonon effect successively on heating. Superior corrosion resistance to both acid and alkaline conditions merits potential applications of the present ZTE metal.

关键词： zero thermal expansion pyrochlore magnetic structure local composition heterogeneity

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Gradient C f /ZrB 2 -SiC composites integrating low-density, good mechanical properties and heat-resistant

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Journal of Materials science & technology 2026年 242卷 156-165页

作者： Qiang Gao Ping Hu Yuxuan Xia Yuan Cheng Guangdong Zhao Jiaxin Feng Zibin Chen Xinghong Zhang National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and Structures Harbin Institute of Technology Harbin 150080 China Beijing Power Machinery Institute The Third Academy of State-owned Aerospace Giant China Aerospace Science & Industry Corporation (CASIC) Beijing 100074 China School of Chemistry and Materials Science Heilongjiang University Harbin 150080 China

Ultra-high temperature ceramic composites (UHTCCs) with low density and exceptional heat resistance are essential for hypersonic vehicle applications, enabling increased payload capacity and higher Mach numbers. However, developing a fabrication process that enables UHTCCs with both lightweight and superior thermal protection performance is still a challenge. To tackle this problem, in this study, a combinatorial process of vibration-assisted slurry impregnation and polymer infiltration pyrolysis was developed to fabricate gradient lightweight C f /ZrB 2 -SiC composites, consisting of continuous carbon fiber fabric, ZrB 2 -SiC and a carbon aerogels (CAs) layer. The resulting composites exhibit a low density of (0.62–0.96 g cm −3 ) but excellent oxidation and ablation resistance, which can withstand ultrahigh temperatures between 2100 °C and 2500 °C. The porous C f /CAs layer, with a density of 0.38 g cm −3 and specific bending and compressive strengths of 43.47 MPa/(g cm −3 ) and 15.53 MPa/(g cm −3 ), respectively, provides both structural integrity and lightweight properties to the C f /ZrB 2 -SiC composite. Furthermore, the density of the composites can be precisely tailored by adjusting the thickness of the C f /ZrB 2 -SiC layer, allowing for customized fabrication to meet diverse service environment requirements. This flexibility highlights the adaptability of the combined processing techniques. The unique combination of controllable low-density properties and exceptional oxidation and ablation resistance endows gradient lightweight C f /ZrB 2 -SiC composites are promising as lightweight, ultra-high temperature thermal protection systems for hypersonic vehicle applications.

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On-Surface Stereochemical Characterization of a Highly Curved Chiral Nanographene by Noncontact Atomic Force Microscopy and Scanning Tunneling Microscopy

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CCS Chemistry 2023年第12期5卷 2888-2896页

作者： Qigang Zhong Viktor Barat Daniel Csokas Kaifeng Niu Marcin Gorecki Animesh Ghosh Jonas Bjork Daniel Ebeling Lifeng Chi Andre Schirmeisen Mihaiela C.Stuparu Institute of Applied Physics Center for Materials Research(LaMa)Justus-Liebig University Giessen35392 Giessen School of Chemistry Chemical Engineering and BiotechnologyNanyang Technological University637371 Singapore Institute of Organic Chemistry Research Center for Natural SciencesH-1117 Budapest Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano and Soft MaterialsSoochow University215123 Suzhou Department of Physics Chemistry and BiologyIFMLinkoping University58183 Linkoping Institute of Organic Chemistry Polish Academy of Sciences01-224 Warsaw Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsMacao University of Science and TechnologyTaipa 999078MacaoChina

A highly distorted chiral nanographene structure composed of triple corannulene-fused[5]helicenes is prepared with the help of the Heck reaction and oxidative photocyclization with an overall isolated yield of 28%.The complex three-dimensional(3D)structure of the bowl-helix hybrid nanostructure is studied by a combination of noncontact atomic force microscopy(AFM)and scanning tunneling microscopy(STM)on the Cu(111)surface,density functional theory calculations,AFM/STM simulations,and high-performance liquid chromatography-electronic circular dichroism *** examination reveals a molecular structure in which the three bowl-shaped corannulene bladesd position themselves in a C3-symmetric fashion around a highly twisted triphenylene *** molecule appears to be shaped like a propeller in which the concave side of the bowls face away from the connected[5]helicene *** chirality of the nanostructure is confirmed by the direct visualization of both MMM and PPP enantiomers at the single-molecule level by scanning probe *** results underline that submolecular resolution imaging by AFM/STM is a powerful real-space tool for the stereochemical characterization of 3D curved chiral nanographene structures.

关键词： chirality at surfaces noncontact atomic force microscopy scanning tunnelling microscopy submolecular resolution imaging single-bond resolution curved nanographenes multiple helicenes chiral nanostructures bowl-helix hybrids scanning probe microscopy

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Mode I Fracture Analysis of Adhesively Bonded Bi-Material Dcb Joints

SSRN

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SSRN 2023年

作者： Wang, Wandong Zhang, Shijie Chen, Guiyong Zhu, Yangxuan Zhao, Tian School of Civil Aviation Northwestern Polytechnical University Shaanxi Xi’an710072 China Co. Ltd 610000 China Hubei Key Laboratory of Theory and Application of Advanced Material Mechanics School of Science Wuhan University of Technology Wuhan430070 China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Institute of Advanced Structure Technology Beijing Institute of Technology Beijing100081 China

There has been a disputation about how to design bi-material double cantilever beam (DCB) joints to measure pure mode I fracture toughness. This paper develops a theoretical frame to calculate the stresses in the adhesive layer and perform the data reduction and mode partitioning for generic bi-material DCB specimens. The theoretical model was validated using experimental data and conventional finite element method. The prediction results substantiate that the strain-based design strategy leads to a pure mode I fracture of the bi-material DCB joints. The proposed theoretical method can promote the application of strain-based criterion for designing the adhesively bonded bi-material DCB joints to appropriately obtain the pure mode I critical fracture toughness. © 2023, The Authors. All rights reserved.

关键词： Adhesives

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Pilot-Scale Poly(Alkyl-Biphenyl Pyridine)-Based Monovalent Anion Perm-Selective Membranes with Exceptional Cl-/So42- Separation Coefficient in Ion-Distillation

SSRN

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SSRN 2024年

作者： Chen, Qian Zhu, Yanran Jiang, Chenxiao Song, Wanjie Ye, Qiaoyun He, Haoyang Ding, Ziyi Fu, Rongqiang Liu, Zhaoming Ge, Liang Xu, Tongwen Key Laboratory of Precision and Intelligent Chemistry School of Chemistry and Materials Science University of Science and Technology of China Hefei230026 China Applied Engineering Technology Research Center for Functional Membranes Institute of Advanced Technology University of Science and Technology of China Hefei230088 China Shandong Tianwei Membrane Technology Co. LTD Weifang262737 China

Monovalent anion perm-selective membranes (MAPMs) were fabricated from poly(alkyl-biphenyl pyridine) backbone via Menshutkin reaction and in-situ thermal crosslinking. Compared to the commercial ACS membrane (Cl- flux of 2.44 mol m-2 h-1, perm-selectivity of 5.55), the optimum MAPM exhibited superior Cl- ions flux of 2.78 mol m-2 h-1 and Cl-/SO42- perm-selectivity of 10.5 at current density of 10 mA cm-2. Additionally, the optimum MAPM was successfully scaled up and comprehensively evaluated, demonstrating exceptional ion separation performance and operational stability. Notably, in the ion-distillation process, the scale-up membrane displayed an extremely high separation coefficient of Cl-/SO42- over 15,000. The membrane shows promise for practical applications in treating high salt wastewater and desalination processes requiring Cl-/SO42- separation. © 2024, The Authors. All rights reserved.

关键词： Distillation

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An Efficient Boron Source Activation Strategy for the Low‑Temperature Synthesis of Boron Nitride Nanotubes

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Nano-Micro Letters 2025年第1期17卷 548-558页

作者： Ying Wang Kai Zhang Liping Ding Liyun Wu Songfeng E Qian He Nanyang Wang Hui Zuo Zhengyang Zhou Feng Ding Yue Hu Jin Zhang Yagang Yao National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional Materialsand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093People’s Republic of China School of Electronic Information and Artificial Intelligence Shaanxi University of Science&TechnologyXian 710000People’s Republic of China College of Bioresources Chemical and Materials Engineering Shaanxi University of Science&TechnologyXian 710000People’s Republic of China Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325000People’s Republic of China Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518000People’s Republic of China College of Chemical and Molecular Engineering Peking UniversityBeijing 100871People’s Republic of China

Lowering the synthesis temperature of boron nitride nanotubes(BNNTs)is crucial for their *** primary reason for adopting a high temperature is to enable the effective activation of highmelting-point solid *** this study,we developed a novel approach for efficiently activating boron by introducing alkali metal compounds into the conventional MgO–B *** approach can be adopted to form various low-melting-point AM–Mg–B–O growth *** growth systems have improved catalytic capability and reactivity even under low-temperature conditions,facilitating the synthesis of BNNTs at temperatures as low as 850℃.In addition,molecular dynamics simulations based on density functional theory theoretically demonstrate that the systems maintain a liquid state at low temperatures and interact with N atoms to form BN *** findings offer novel insights into the design of boron activation and are expected to facilitate research on the low-temperature synthesis of BNNTs.

关键词： Boron nitride nanotubes Low-temperature Boron activation Density functional theory

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Stress Compensation Based on Interfacial Nanostructures for Stable Perovskite Solar Cells

Stress Compensation Based on Interfacial Nanostructures for ...

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第十届新型太阳能材料科学与技术学术研讨会

作者： Cheng Zhu Xi Wang Hangxuan Li Chenyue Wang Ziyan Gao Pengxiang Zhang Xiuxiu Niu Nengxu Li Zipeng Xu Zhenhuang Su Yihua Chen Huachao Zai Haipeng Xie Yizhou Zhao Ning Yang Guilin Liu Xueyun Wang Huanping Zhou Jiawang Hong Xingyu Gao Yang Bai Qi Chen Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications MIIT Key Laboratory for Low-dimensional Quantum Structure and DevicesExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of Technology

The long-term stability issue of halide perovskite solar cells hinders their *** residual stress-strain affects device stability,which is derived from the mismatched thermophysical and mechanical properties between adjacent *** this work,we introduced the RbCO layer at the interface of SnO/perovskite with the hierarchy morphology of snowflake-like micro-islands and dendritic *** a suitable thermal expansion coefficient,the RbCO layer benefits the interfacial stress relaxation and results in a compressive stress-strain in the perovskite ***,reduced non-radiative recombination losses and optimized band alignment were *** enhancement of open-circuit voltage from 1.087 to 1.153 V in the resultant device was witnessed,which led to power conversion efficiency（PCE） of 22.7%（active area of 0.08313 cm）,and 20.6%（1 cm）.Moreover,these devices retained 95% of its initial PCE under the maximum power point tracking after 2700 *** suggests inorganic materials with high thermal expansion coefficients and specific nanostructures are promising candidates to optimize interfacial mechanics,which improves operational stability of perovskite cells.

关键词： Strain engineering thermal expansion coefficient interfacial nanostructures perovskite solar cells long-term stability

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Cross-Scale Synthesis of Organic High-k Semiconductors Based on Spiro-Gridized Nanopolymers

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Research 2022年第2期2022卷 111-122页

作者： Dongqing Lin Wenhua Zhang Hang Yin Haixia Hu Yang Li He Zhang Le Wang Xinmiao Xie Hongkai Hu Yongxia Yan Haifeng Ling Jin'an Liu Yue Qian Lei Tang Yongxia Wang Chaoyang Dong Linghai Xie Hao Zhang Shasha Wang Ying Wei Xuefeng Guo Dan Lu Wei Huang Centre for Molecular Systems and Organic Devices(CMSOD) State Key Laboratory of Organic Electronis and Information Displays&Institute of Advanced Materials(AM)Nanjing University of Posts.Telecommunications9 Wenyuan RoadNarnjing 210023China National Symnchrotron Radiationr Laboratory Anhui Provincial Engincering Laboratory of Advanced Functional Polymer FilmCAS Key Laboratory of Soft Matter ChemistryUniversity of Science and Technology of ChinaHgfei 230026China School of Plysics State Key Laboratory of Crystal MaterialsShandong UniversityJinanShardong 250100China Beijing National Laboratony for Molecular Scences National Biomedical Imaging CenterCollege of Chemistry and Molecular EngineeringPeking UniversityBejing 100871China Frontiers Science Center for Flexible Electronics(FSCFE) MIIT Key Laboratory of Flexible Electronics(KLoFE)Northwestern Polytechnical UntiversityXian 710072China State Key Laboratory of Supramolecular Structure and Materias College of Chemistyjilin University2699 Qianjin AvenueChangchun 130012China

High dielectric constants in organic semiconductors have been identified as a central challenge for the improvement in not only piexoelectric,preolecric,and freeltric efcts but also photoclecric conversion eficiency in OPVs,carrier mobility in OFETS,and charge density in charge-trapping ***,we report an ultralong persistence length(≈41 nm)efet of spiro-fused organic nanopolymers on dielectric properties,together with excitonic and charge carrier *** state-of-the-art nanopolymers,namely,nanopolyspirogrids(NPSGs),are synthesized via the simple crossscale Friedel-Crafts polygridlization of AjB-type *** high dielectric constant(k=8.43)of NPSG is firstly achieved by locking spiro-polygridization efect that results in the enhancement of dipole *** doping into a polystyrene-based dielectric layer,such a high-k feature of NPSG increases the feld-ffct carrier mobility from 0.20 to 0.90cm^(2)Vl s'in pentacene OFET ***,amorphous NPSG film exhibits an ultralow energy disorder(<50 meV)for an exellent zero-field hole mobility of 3.94×10^(-1)cm^(2)V^(-1)s^(-1).surpassing most of the amorphousπconjugated polymers Onganic nanopolymers with high dielectric constants open a new way to break through the bottleneck of eficiency and multifunctionality in the blueprint of the fourth generation semiconductors.

关键词： dielectric charge amorphous

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Recent advances in metastable alloys for hydrogen storage:a review

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Rare Metals 2022年第6期41卷 1797-1817页

作者： Huai-Jun Lin Yan-Shan Lu Liu-Ting Zhang Hai-Zhen Liu Kaveh Edalati Adám Révész Institute of Advanced Wear and Corrosion Resistance and Functional Materials Jinan UniversityGuangzhou 510632China Guangdong Provincial Key Laboratory of Advance Energy Storage Materials South China University of TechnologyGuangzhou 510640China School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology School of Physical Science and TechnologyGuangxi UniversityNanning 530004China Guangxi Novel Battery Materials Research Center of Engineering Technology School of Physical Science and TechnologyGuangxi UniversityNanning 530004China Guangxi Key Laboratory of Processing for Non-Ferrous Metallic and Featured Materials Guangxi UniversityNanning 530004China International Institute for Carbon-Neutral Energy Research(WPI-I2CNER) Kyushu UniversityFukuoka 819-0395Japan Department of Materials Physics E?tv?s UniversityBudapest 1518Hungary

Development of new materials with high hydrogen storage capacity and reversible hydrogen sorp-tion performances under mild conditions has very high value in both fundamental and application *** the past years,some new systems with metastable structures,such as ultra-fine nanocrystalline alloys,amorphous alloys,nanoglass alloys,immiscible alloys,high-entropy alloys,have been abundantly studied as hydrogen storage *** new hydrogen storage properties either from the kinetics or thermodynamics aspects have been *** this review,recent advances of studies on metastable alloys for hydrogen storage applications have been comprehensively *** materials preparation methods to synthesize metastable hydrogen storage alloys are firstly ***,hydrogen storage prop-erties of the metastable alloys are summarized and dis-cussed,focusing on the unique kinetics and thermodynamics properties by forming of such unique metastable *** examples,superior hydrogena-tion kinetics and higher hydrogen storage capacity have been achieved in Mg-based amorphous and nanoglass *** thermodynamics properties can be obtained in the immiscible Mg-Mn and Mg-Zr *** addition to highlighting the recent achievements of metastable alloys in the field of hydrogen storage,the remaining challenges and trends of the emerging research are also discussed.

关键词： Hydrogen storage Metastable alloys Kinetics Thermodynamics

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