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Si Doping-Induced Electronic Structure Regulation of Single-Atom Fe Sites for Boosted CO_(2) Electroreduction at Low Overpotentials

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Research 2023年第4期2023卷 307-319页

作者： Changsheng Cao Shenghua Zhou Shouwei Zuo Huabin Zhang Bo Chen Junheng Huang Xin-Tao Wu Qiang Xu Qi-Long Zhu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China University of Chinese Academy of Science Beijing100049China KAUST Catalysis Center(KCC) King Abdullah University of Science and Technology(KAUST)Thuwal23955-6900Saudi Arabia Department of Chemistry City University of Hong KongHong Kong999077China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of NanomaterialsFujianInstitute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China Institute for Integrated CellMaterial Sciences(iCeMS) Kyoto UniversityKyoto 606-8501Japan Shenzhen Key Laboratory of Micro/Nano-Porous Functional Materials(SKLPM) SUSTech-Kyoto University Advanced Energy Materials Joint Innovation Laboratory(SKAEM-JIL)and Department of Materials Science and EngineeringSouthern University of Science and Technology(SUSTech)Shenzhen518055China

Transition metal-based single-atom catalysts(TM-SACs)are promising alternatives to Au-and Ag-based electrocatalysts for CO production through CO_(2)reduction ***,developing TM-SACs with high activity and selectivity at low overpotentials is ***,a novel Fe-based SAC with Si doping(Fe-N-C-Si)was prepared,which shows a record-high electrocatalytic performance toward the CO_(2)-to-CO conversion with exceptional current density(>350.0 mA cm^(−2))and~100%Faradaic efficiency(FE)at the overpotential of<400 mV,far superior to the reported Fe-based *** assembling Fe-N-C-Si as the cathode in a rechargeable Zn-CO_(2)battery delivers an outstanding performance with a maximal power density of 2.44 mW cm^(−2)at an output voltage of 0.30 V,as well as high cycling stability and FE(>90%)for CO *** combined with theoretical analysis unraveled that the nearby Si dopants in the form of Si-C/N bonds modulate the electronic structure of the atomic Fe sites in Fe-N-C-Si to markedly accelerate the key pathway involving^(*)CO intermediate desorption,inhibiting the poisoning of the Fe sites under high CO coverage and thus boosting the CO_(2)RR *** work provides an efficient strategy to tune the adsorption/desorption behaviors of intermediates on singleatom sites to improve their electrocatalytic performance.

关键词： desorption bonds exceptional

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Shining light on transition metal tungstate-based nanomaterials for electrochemical applications:Structures,progress,and perspectives

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Nano Research 2022年第8期15卷 6924-6960页

作者： Kaijia Feng Zhefei Sun Yong Liu Feng Tao Junqing Ma Han Qian Renhong Yu Kunming Pan Guangxin Wang Shizhong Wei Qiaobao Zhang National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials Henan Key Laboratory of Non–Ferrous Materials Science&Processing TechnologySchool of Materials Science and EngineeringHenan University of Science and TechnologyLuoyang 471023China Provincial and Ministerial Co–construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology Henan Key Laboratory of High-temperature Structural and Functional MaterialsHenan University of Science and TechnologyLuoyang 471023China Department of Materials Science and Engineering College of MaterialsXiamen UniversityXiamen 361005China Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials Xiamen UniversityXiamen 361005China

Transition metal tungstate-based nanomaterials have become one of the research hotspots in electrochemistry due to their abundant natural resources,low costs,and environmental *** studies have demonstrated their significant potentials for electrochemical applications,such as supercapacitors,Li-ion batteries,Na-ion batteries,electrochemical sensing,and *** the rapidly growing research enthusiasm for this topic over the last several years,herein,a critical review of recent progress on the application of transition metal tungstates and their composites for electrochemical applications is *** relationships between synthetic methods,nano/micro structures and electrochemical properties are systematically ***,their promising prospects for future development are also *** is anticipated that this review will inspire ongoing interest in rational designing and fabricating novel transition metal tungstate-based nanomaterials for high-performance electrochemical devices.

关键词： transition metal tungstates supercapacitors lithium-ion batteries sodium-ion batteries electrochemical sensing electrocatalysis

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Accelerated proton transport modulates dynamic hydrogen bonding networks in eutectic gel electrolytes for low-temperature aqueous Zn-metal batteries

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Journal of Energy Chemistry 2025年 109卷 325-336页

作者： Baonian Zhu Yuefeng Yan Jingzhe Hong Yuhao Xia Meixiu Song Xiaoshuang Wang Yanan Liu Bo Zhong Dongdong Liu Tao Zhang Xiaoxiao Huang State Key Laboratory of Precision Welding & Joining of Materials and Structures Harbin Institute of Technology Harbin 150001 Heilongjiang China School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 Heilongjiang China MIIT Key Laboratory of Advanced Structural–Functional Integration Materials & Green Manufacturing Technology Harbin 150001 Heilongjiang China Key Laboratory of Advanced Technologies of Materials (Ministry of Education) School of Materials Science and Engineering Southwest Jiaotong University Chengdu 610031 Sichuan China School of Materials Science and Engineering Harbin Institute of Technology (Weihai) Weihai 264200 Shandong China

Aqueous Zn-metal batteries (AZMBs) performance is hampered by freezing water at low temperatures, which hampers their multi-scenario application. Hydrogen bonds (HBs) play a pivotal role in water freezing, and proton transport is indispensable for the establishment of HBs. Here, the accelerated proton transport modulates the dynamic hydrogen bonding network of a Zn (BF 4 ) 2 /EMIMBF 4 impregnated polyacrylamide/poly (vinyl alcohol)/xanthan gum dual network eutectic gel electrolyte (PPX-ILZSE) for low-temperature AZMBs. The PPX-ILZSE forms more HBs, shorter HBs lifetimes, higher tetrahedral entropy, and faster desolvation processes, as demonstrated by experimental and theoretical calculations. This enhanced dynamic proton transport promotes rapid cycling of HBs formation-failure, and for polyaniline cathode (PANI) abundant redox sites of proton, confers excellent low temperature electrochemical performance to the Zn//PANI full cell. Specific capacities for 1000 and 5000 cycles at 1 and 5 A g −1 were 149.8 and 128.4 mA h g −1 at room temperature, respectively. Furthermore, specific capacities of 131.1 mA h g −1 (92.4% capacity retention) and 0.0066% capacity decay per lap were achieved for 3000 and 3500 laps at −30 and 40 °C, respectively, at 0.5 A g −1 . Furthermore, in-situ protective layer of ZnOHF nano-arrays on the Zn anode surface to eliminate dendrite growth and accelerate Zn-ions adsorption and charge transfer.

关键词： Redox reactions

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Solvents adjusted pure phase CoCO_(3) as anodes for high cycle stability

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Journal of advanced Ceramics 2021年第3期10卷 509-519页

作者： Liming LIU Xiaoxiao HUANG Zengyan WEI Xiaoming DUAN Bo ZHONG Long XIA Tao ZHANG Huatao WANG Dechang JIA Yu ZHOU Rui ZHANG Department of Materials Science School of Material Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Key Laboratory of Advanced Structural Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Harbin Institute of Technology at WeihaiWeihai 264009China College of Materials Science and Engineering Hunan UniversityChangsha 410082China

CoCO_(3) with high theoretical capacity has been considered as a candidate anode for the next generation of lithium-ion batteries(LIBs).However,the electrochemical performance of CoCO_(3) itself,especially the cyclic stability at high current density,hinders its ***,pure phase CoCO_(3) particles with different particle and pore sizes were prepared by adjusting the solvents(diethylene glycol,ethylene glycol,and deionized water).Among them,CoCO_(3) synthesized with diethylene glycol(DG-CC)as the solvent shows the best electrochemical performance owing to the smaller particle size and abundant mesoporous structure to maintain robust structural stability.A high specific capacity of 690.7 mAh/g after 1000 cycles was achieved,and an excellent capacity retention was *** capacity was contributed by diverse electrochemical reactions and the impedance of DG-CC under different cycles was further *** results provide an important reference for the structural design and stable cycle performance of pure CoCO_(3).

关键词： lithium ion battery(LIB) cobalt carbonate solvothermal method morphological control solvent pure phase

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Mechanical Properties and Thermal Shock Resistance of SrAl_(2)Si_(2)O_(8) Reinforced BN Ceramic Composites

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无机材料学报 2024年第10期39卷 1182-1188页

作者： WANG Bo CAI Delong ZHU Qishuai LI Daxin YANG Zhihua DUAN Xiaoming LI Yanan WANG Xuan JIA Dechang ZHOU Yu International Joint Laboratory of Advanced Nanomaterials of Heilongjiang Province College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China Key Laboratory of Advanced Structural-Functional Integration Materials School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China China Resources Cement Technology R&D Co. LtdGuangzhou 510000China The First Military Representative Office of the Army Equipment Department in Beijing Beijing 100072China The Fourth System Design Department Fourth AcademyChina Aerospace Science and Industry Corporation LimitedBeijing 100048China School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China

Hexagonal boron nitride(h-BN)ceramics have become exceptional materials for heat-resistant components in hypersonic vehicles,owing to their superior thermal stability and excellent dielectric ***,their densification during sintering still poses challenges for researchers,and their mechanical properties are rather *** this study,SrAl_(2)Si_(2)O_(8)(SAS),with low melting point and high strength,was introduced into the h-BN ceramics to facilitate the sintering and reinforce the strength and ***,BN-SAS ceramic composites were fabricated via hot press sintering using h-BN,SrCO_(3),Al_(2)O_(3),and SiO_(2) as raw materials,and effects of sintering pressure on their microstructure,mechanical property,and thermal property were *** thermal shock resistance of BN-SAS ceramic composites was *** show that phases of as-preparedBN-SAS ceramic composites are h-BN and h-SrAl_(2)Si_(2)O_(8).With the increase of sintering pressure,the composites’densities increase,and the mechanical properties shew a rising trend followed by a slight *** a sintering pressure of 20 MPa,their bending strength and fracture toughness are(138±4)MPa and(1.84±0.05)MPa·m^(1/2),*** sintered at 10 MPa exhibit a low coefficient of thermal expansion,with an average of 2.96×10^(-6) K^(-1) in the temperature range from 200 to 1200℃.The BN-SAS ceramic composites prepared at 20 MPa display higher thermal conductivity from 12.42 to 28.42 W·m^(-1)·K^(-1) within the temperature range from room temperature to 1000℃.Notably,BN-SAS composites exhibit remarkable thermal shock resistance,with residual bending strength peaking and subsequently declining sharply under a thermal shock temperature difference ranging from 600 to 1400℃.The maximum residual bending strength is recorded at a temperature difference of 800℃,with a residual strength retention rate of 101%.As the thermal shock temperature difference increase,the degree of oxida

关键词： BN matrix composite hot-press sintering mechanical property thermal shock resistance service reliability

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Preparation,microstructure and degradation behavior of Mg−2Zn−0.4Sc−0.2Zr alloy wire

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Transactions of Nonferrous Metals Society of China 2024年第11期34卷 3585-3598页

作者： Yu-qing HE Ri-chu WANG Xiao-hui DUAN Xiang PENG Yu-si CHEN Yan FENG School of Materials Science and Engineering Central South UniversityChangsha 410083China Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province Central South UniversityChangsha 410083China National Key Laboratory of Science and Technology on High-strength Structural Materials Central South UniversityChangsha 410083China Department of Hepatobiliary Surgery Human Provincial People’s Hospital/The First-affiliated Hospital of Hunan Normal UniversityChangsha 410005China

A biodegradable Mg−2Zn−0.4Sc−0.2Zr(ZK20−0.4Sc)alloy wire with a diameter of 0.5 mm was prepared by a combination of hot extrusion and *** average grain size of ZK20−0.4Sc alloy wire on the longitudinal section along the drawing direction is approximately 7.3μ*** texture results show relatively strong<1020>and weak<1010>fiber texture components parallel to the drawing *** ZK20−0.4Sc alloy wire exhibits better mechanical properties with the tensile strength,yield strength and elongate of(329±2)MPa,(287±2)MPa and(14.2±0.5)%,*** better mechanical properties are mainly attributed to the grain refinement strengthening,dislocation strengthening and precipitation *** the immersion time increasing to 14 d,the corrosion type transfers from filament corrosion and pitting corrosion to severe localized corrosion.

关键词： Mg alloy wire cold drawing microstructure mechanical properties degradation behavior

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Chip-scale metalens microscope for wide-field and depth-of-field imaging

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advanced Photonics 2022年第4期4卷 68-75页

作者： Xin Ye Xiao Qian Yuxin Chen Rui Yuan Xingjian Xiao Chen Chen Wei Hu Chunyu Huang Shining Zhu Tao Li Nanjing University College of Engineering and Applied SciencesNational Laboratory of Solid State MicrostructuresKey Laboratory of Intelligent Optical Sensing and IntegrationJiangsu Key Laboratory of Artificial Functional MaterialsNanjingChina Collaborative Innovation Center of Advanced Microstructures NanjingChina

Microscopy is very important in research and industry,yet traditional optical microscopy suffers from the limited field-of-view(FOV)and depth-of-field(DOF)in high-resolution *** demonstrate a simultaneous large FOV and DOF microscope imaging technology based on a chip-scale metalens device that is implemented by a SiNxmetalens array with a co-and cross-polarization multiplexed dual-phase design and dispersive spectrum zoom effect.A 4-mm×4-mm FOV is obtained with a resolution of 1.74μm and DOF of200μm within a wavelength range of 450 to 510 nm,which definitely exceeds the performance of traditional microscopes with the same ***,it is realized in a miniaturized compact prototype,showing an overall advantage for portable and convenient microscope technology.

关键词： metalens microscope wide-field imaging

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Efficient Microwave Absorber for Phase-Engineered Modulation of MoS2 Induced by Trace Atom Doping

SSRN

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SSRN 2025年

作者： Ma, Long He, Yunfei Dou, Sihao Xia, Long Liu, Dongdong Zhong, Bo Huang, Xiaoxiao School of Materials Science and Engineering Harbin Institute of Technology at Weihai Weihai264009 China School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China MIIT Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology Harbin Institute of Technology Harbin150001 China

The traditional electromagnetic microwave (EM) absorption materials are limited by the electromagnetic response characteristics dominated by a single loss mechanism, and it is difficult to realize the cooperative optimization of multiple loss mechanisms and impedance matching. In this study, the phase structure engineering and defect characteristics of MoS2 were controlled by heteroatom doping strategy, and Fe-doped yolk-shell MoS2 nanoflower microspheres EM absorption material was successfully prepared. The introduction of Fe atoms can form an atomic-level "electron-rich center" defect, induce crystal structure distortion, and thus realize the construction of a high-density and stable 1T/2H heterogeneous interface. The ratio of 1T/2H phase increases with the increase of the gradient of Fe atom doping. Specifically, the 8Fe-MoS2 sample demonstrated excellent EM absorption performance at a matching thickness of 1.95mm, with a maximum effective absorption bandwidth (EAB) of 5.36 GHz and a minimum reflection loss (RL) of -72.18 dB (1.65 mm). Through detailed characterization and multi-scale simulation, it is revealed that the superior EM absorption performance is the result of the synergistic effect of Fe defect induced polarization, interface polarization at high density heterogeneous interface, resistance loss and EM transmission path optimization. This multi-scale control strategy precisely combines the coupling effect of MoS2's defect characteristics and phase structure with multiple dielectric loss mechanisms, which provides a new design idea for developing high-performance MoS2-based EM absorption materials. © 2025, The Authors. All rights reserved.

关键词： Crystal atomic structure

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Lightweight Y2O3 stabilized ZrO2 (YSZ) fiber porous ceramics with ultra-low thermal conductivity

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Ceramics International 2025年

作者： Zhao, Yingjie Sun, Xiaohong Guo, Ruisong Liu, Hongyao Zhao, Xinqi Huo, Mingda Ren, Junbo Fu, Weijie Li, Xin School of Materials Science and Engineering State Key Laboratory of Precious Metal Functional Materials Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin University Tianjin 300072 China School of Materials Science and Engineering State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an710049 China School of Materials Science and Engineering Key Laboratory of Intelligent Sensing Materials and Chip Integration Technology of Zhejiang Province Hangzhou Innovation Institute of Beihang University Hangzhou310052 China

Fiber porous ceramics have numerous applications in protecting structural parts from melting due to combustion gases in aircraft engines. Although these materials have been utilized for decades, considerable research continues to focus on their further optimization, particularly in enhancing high-temperature resistance, lowering thermal conductivity, and improving compressive strength. In this work, the three-dimensional Y2O3-stabilized ZrO2 (YSZ) fiber porous ceramics were fabricated by adding silica-boron sol (SBS) as an inorganic binder to the YSZ fiber substrate followed by a pressureless sintering process. During this process, a borosilicate glass phase was developed at the intersections of the fibers, helping enhance the thermal stability and improve mechanical properties. The three-dimensional YSZ fiber porous ceramics were characterized by ultra-low thermal conductivity (0.054–0.065 W·m−1·K−1), enhanced compressive strength (144.82–238.81 kPa), high open porosity (88.64–91.67 %) and extremely low bulk density (0.41–0.53 g·cm−3). When the SBS content in the YSZ fiber porous ceramics was 25 wt%, the sample achieved optimal overall performance, with a low bulk density of 0.44 g·cm−3, thermal conductivity of 0.058 W·m−1·K−1 and the compressive strength of 201.26 kPa. The research provides critical insights for preparation and engineering applications of YSZ fiber porous ceramics in aircraft engine thermal protection systems. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Binders

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Oxidation behavior of Mo-Si-B alloys at medium-to-high temperatures

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Journal of materials Science & Technology 2021年第1期60卷 113-127页

作者： Kunming Pan Yanping Yang Shizhong Wei Honghui Wu Zhili Dong Yuan Wu Shuize Wang Laiqi Zhang Junping Lin Xinping Mao Henan Key Laboratory of High-temperature Structural and Functional Materials National Joint Engineering Research Center for Abrasion Control and Molding of Metal MaterialsHenan University of Science and TechnologyLuoyang 471003China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Nanyang Technological UniversitySingapore State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

Continuous exploration of high-temperature structural materials is being driven by the needs of gasturbine engines capable of withstanding the high-temperature *** low melting points of currently applied superalloys restrain the further improvement of service tempe *** higher melting tempe ratures above 2000℃,Mo-Si-B alloys are regarded as a new generation of ultrahightemperature structural ***,oxidation is a concern for the industrial application of Mo-Si-B ***,an in-depth understanding of the oxidation mechanisms may contribute to solving this issue,whereas relevant reviews about their recent advances are *** the current work,a comprehensively systematic review about the oxidation behaviors of Mo-Si-B alloys is described for this purpose.

关键词： Mo-Si-B alloys Oxidation resistance Alloying and modification Enhancement

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