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Nitrogen-Doped Carbon-Encased Bimetallic Selenide for High-Performance Water Electrolysis

Nano-Micro Letters 2019年第4期11卷 185-195页

作者： Junhui Cao Kexin wang Jiayi Chen Chaojun Lei Bin Yang Zhongjian li Lecheng Lei Yang Hou Kostya Ostrikov Key Laboratory of Biomass Chemical engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310058People’s Republic of China Ningbo Research Institute Zhejiang UniversityNingbo 315100People’s Republic of China Institute of zhejiang university-Quzhou 78 Jiuhua Boulevard NorthQuzhou 324000People’s Republic of China School of Chemistry Physicsand Mechanical EngineeringQueensland University of TechnologyBrisbaneQLD 4000Australia

Demand of highly efficient earth-abundant transition metal-based electrocatalysts to replace noble metal materials for boosting oxygen evolution reaction(OER)is rapidly ***,an electrochemically exfoliated graphite(EG)foil supported bimetallic selenide encased in N-doped carbon(EG/(Co,Ni)Se2-NC)hybrid is developed and synthesized by a vapor-phase hydrothermal strategy and subsequent selenization *** as-prepared EG/(Co,Ni)Se2-NC hybrid exhibits a core-shell structure where the particle diameter of(Co,Ni)Se2 core is about 70 nm and the thickness of N-doped carbon shell is approximately 5 *** from the synergistic effects between the combination of highly active Co species and improved electron transfer from Ni species,and N-doped carbon,the EG/(Co,Ni)Se2-NC hybrid shows remarkable electrocatalytic activity toward OER with a comparatively low overpotential of 258 mV at an current density of 10 mA cm?2 and a small Tafel slope of 73.3 mV dec?*** excellent OER catalysis performance of EG/(Co,Ni)Se2-NC hybrid is much better than that of commercial Ir/C(343 mV at 10 mA cm?2 and 98.1 mV dec?1),and even almost the best among all previously reported binary CoNi selenide-based OER ***,in situ electrochemical Raman spectroscopy combined with ex situ X-ray photoelectron spectroscopy analysis indicates that the superb OER catalysis activity can be attributed to the highly active Co-OOH species and modified electron transfer process from Ni element.

关键词： Core-shell structure Bimetallic selenide N-doped carbon Synergistic effect Oxygen evolution reaction

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Enhancement of in-plane thermal conductivity of flexible boron nitride heat spreaders by micro/nanovoid filling using deformable liquid metal nanoparticles

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Rare Metals 2023年第11期42卷 3662-3672页

作者： Pei-Di Tao Shao-Gang wang Lu Chen Jun-Feng Ying Le Lv li-Wen Sun Wu-Bo Chu Kazuhito Nishimura li Fu Yue-Zhong wang Jin-Hong Yu Nan Jiang Wen Dai Yao-Kang Lv Cheng-Te lin Qing-Wei Yan college of Chemical engineering Zhejiang University of TechnologyHangzhou310058China Qianwan Institute Ningbo Institute of Materials Technology and Engineering(NIMTE)Chinese Academy of SciencesNingbo315201China Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingboInstitute of Materials Technology and Engineering(NIMTE)Chinese Academy of SciencesNingbo315201China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Center of Materials Science and Optoelectronics engineering University of Chinese Academy of SciencesBeijing100049China Advanced Nano-Processing engineering Lab Mechanical Systems EngineeringKogakuin UniversityTokyo192-0015Japan college of Materials and Environmental engineering Hangzhou Dianzi UniversityHangzhou310018China

With the fast development of integrated circuit devices as well as batteries with high energy densities,the thermal management of electronic components is becoming increasingly crucial to maintaining their reliable *** nitride nanosheets(BNNS),which have superhigh thermal conductivity along the in-plane direction while remaining electrically insulating,were widely regarded as an ideal filler for preparing high-performance polymer composites to address the‘‘thermal failure''***,due to the instinctive rigidity of BNNS,the nanosheets are unable to form a tightly interfacial contact between the adjoining fillers,resulting in some micro-and nanovoids within the heat transfer pathways and severely limiting further thermal conductivity enhancement for BNNS-based ***,soft and deformable liquid metal(eutectic gallium-indium,EGaIn)nanoparticles were employed to fill the gaps between the adjacent BNNS with a rational design of mass ratios of BNNS and EGaIn,leading to a strongly synergistic effect with BNNS on thermal conductivity *** a result,the composite film(BNNS:63 wt%and EGaIn:7 wt%)employing cellulose nanofibers(CNF:30 wt%)as the polymer matrix achieves superhigh thermal conductivity along the in-plane direction of up to(90.51±6.71)W·m^(-1)·K^(-1),showing the highest value among the BNNSbased composites with a bi-filler system as far as we ***,the film can work as a heat spreader for the heat dissipation of high-power light emitting diodes,outperforming tin foil in cooling efficiency.

关键词： Boron nitride nanosheet liquid metal Eutectic gallium-indium In-plane thermal conductivity Heat spreader

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Toughening FeMn-based high-entropy alloys via retarding phase transformation

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Journal of Materials Science & technology 2020年第16期47卷 167-172页

作者： Ran Wei Kaisheng Zhang liangbin Chen Zhenhua Han Chen Chen Tan wang Jianzhong Jiang Tingwei Hu Shaokang Guan Fushan li School of Materials Science and engineering Zhengzhou UniversityZhengzhou450001China college of Physics and Electronic engineering Xinyang Normal UniversityXinyang464000China School of Materials Science and engineering Xi'an University of TechnologyXi'an710048China International Center for New-Structured Materials(1CNSM) Laboratory of New-Structured MaterialsState Key Laboratory of Silicon Materialsand School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China Key Laboratory of Tropical Translational Medicine of Ministry of Education/School of Tropical Medicine and Laboratory Medicine Hainan Medical UniversityHaikou571199China

Various high entropy alloys(HEAs)with improved mechanical properties were developed by reducing the phase stability and then promote the phase *** promotion of deformation-induced ma rtensitic transformation from face-centered cubic(fcc)to hexagonal close-packed(hcp)mostly focuses on overcoming the trade-off of strength-ductility of HEAs at room ***,the hcp phase is brittle at cryogenic-temperature,and thus the enhancement of cryogenic ductility of these HEAs still remains a ***,we present a concept to toughening Fe50Mn30Co10Cr10 HEAs at cryogenictemperature via retarding phase *** retarded but more persistent phase transformation at high strain level was realized via tailoring the grain *** further verify the effect of phase transformation rate on ductility of HEAs,the mechanical properties of Fe40Mn40Co10Cr10 HEAs with higher stacking fault energy were tested at room and cryogenic temperature,*** present study sheds light on developing high perfo rmance HEAs,especially for alloys with brittle phase transformation products.

关键词： High-entropy alloys(HEAs) Transformation induced ductility mechanical properties Cryogenic temperature

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OsRLR4 binds to the OsAUX1 promoter to negatively regulate primary root development in rice

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Journal of Integrative Plant Biology 2022年第1期64卷 118-134页

作者： Chendong Sun Dongming li Zhenyu Gao Lei Gao lianguang Shang Mei wang Jiyue Qiao Shilin Ding Chuanyou li Markus Geisler Dean Jiang Yanhua Qi Qian Qian Key Laboratory of Herbage&Endemic Crop Biology of Ministry of Education Inner Mongolia Key Laboratory of Herbage&Endemic Crop BiotechnologySchool of Life SciencesInner Mongolia UniversityHohhot 010000China State Key Laboratory of Plant Physiology and Biochemistry College of Life SciencesZhejiang UniversityHangzhou 310058China The Key Laboratory for Quality Improvement of Agricultural Products of zhejiang Province College of Advanced Agricultural SciencesZhejiang Agriculture and Forestry UniversityLin'an Hangzhou 311300China State Key Laboratory of Rice Biology China National Rice Research InstituteChinese Academy of Agricultural SciencesHangzhou 310006China college of life Sciences and Oceanography Guangdong Provincial Key Laboratory for Plant EpigeneticsShenzhen UniversityShenzhenChina Agricultural Genomics Institute at Shenzhen Chinese Academy of Agricultural SciencesShenzhen 518120China State Key Laboratory of Plant Genomics National Center for Plant Gene ResearchInstitute of Genetics and Developmental BiologyThe Chinese Academy of SciencesBeijing 100101China Department of Biology University of FribourgFribourg CH-1700Switzerland

Root architecture is one of the most important agronomic traits that determines rice crop yield. The primary root(PR) absorbs mineral nutrients and provides mechanical support;however, the molecular mechanisms of PR elongation remain unclear in rice. Here, the two loss-of-function T-DNA insertion mutants of root length regulator 4(Os RLR4), osrlr4-1 and osrlr4-2 with longer PR, and three Os RLR4 overexpression lines, OE-Os RLR4-1/-2/-3 with shorter PR compared to the wild type/Hwayoung(WT/HY), were identified. Os RLR4 isone of five members of the PRAF subfamily of the regulator chromosome condensation1(RCC1) family. Phylogenetic analysis of Os RLR4 from wild and cultivated rice indicated that it is under selective sweeps, suggesting its potential role in domestication. Os RLR4 controls PR development by regulating auxin accumulation in the PR tip and thus the root apical meristem activity. A series of biochemical and genetic analyses demonstrated that Os RLR4 functions directly upstream of the auxin transporter Os AUX1. Moreover, Os RLR4 interacts with the TRITHORAX-like protein Os Trx1 to promote H3 K4 me3 deposition at the Os AUX1 promoter, thus altering its transcription level. This work provides insight into the cooperation of auxin and epigenetic modifications in regulating root architecture and provides a genetic resource for plant architecture breeding.

关键词： auxin transporter primary root development regulator chromosome condensation 1 rice root length regulator

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Effects of nanoclay addition on the permeability and mechanical properties of ultra high toughness cementitious composites

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Journal of zhejiang university-Science A(Applied Physics & engineering) 2020年第12期21卷 992-1007页

作者： Min-jia wang He-dong li Qiang ZENG Qing-fen CHANG Xiu-shan wang School of Civil engineering and Architecture Zhejiang Sci-Tech UniversityHangzhou 310018China college of Civil engineering and Architecture Zhejiang UniversityHangzhou 310058China Department of Architectural engineering Liaoyuan Vocational Technical CollegeLiaoyuan 136200China

Tuning microstructures by adding nanoparticles is a promising way of improving the performance of cementitious *** this study,nanoclay was introduced to polyvinyl alcohol(PVA)fiber reinforced ultra high toughness cementitious composites(UHTCCs).The mechanical properties,crack patterns,water permeation resistance,and microstructures of UHTCCs with different dosages of nanoclay were *** addition of a proper dosage of nanoclay shows few effects on the compressive strength of UHTCCs,however,the compressive strength is decreased when an excessive amount of nanoclay is *** flexural deformation capacity of UHTCCs is independent of nanoclay dosage,whereas the flexural strength generally decreases with an increasing dosage of *** cracking patterns were observed in the ultra high toughness cementitious composites containing nanoclay(NC-UHTCC)specimens subject to bending tests.A UHTCC with 1%(in weight)nanoclay shows the best water permeation resistance and the lowest water *** in the mechanical properties and the water permeation resistance of UHTCCs containing different dosages of nanoclay could be ascribed to the synthetic effects of filling and heterogeneous nucleation of nanoclay at low dosages and the agglomeration effect of nanoclay at high *** study is to optimize the water permeation resistance of UHTCCs,paving a path for the future application of UHTCCs in the fields of construction,decoration,and repair.

关键词： Nanoclay Water permeability Pore structure Cementitious composites Strain hardening

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Correlation between crystal structure and mechanical performance of Cr-implanted 300M high-strength steel using X-ray diffraction method

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Journal of Iron and Steel Research International 2019年第10期26卷 1106-1116页

作者： Xiao-hu Chen Ping-ze Zhang Dong-bo Wei Xiao Huang Feng Ding Feng-kun li Xian-jun Dai Zhang-zhong wang college of Materials Science and technology Nanjing University of Aeronautics and AstronauticsNanjing 211106JiangsuChina Ningbo Branch China Ordnance AcademyNingbo 315103ZhejiangChina Jiangsu Key Laboratory of Advanced Structural Materials and Application technology Nanjing 211167JiangsuChina Key Laboratory of Materials Preparation and Protection for Harsh Environment(Nanjing university of Aeronautics and Astronautics) Ministry of Industry and Information TechnologyNanjing 211106JiangsuChina Department of mechanical and Aerospace engineering Carleton UniversityOttawaON ONK1S5B6Canada

In order to study the influence of crystal structure change due to implantation dose on the hardness and wear performance of 300M high-strength steel,samples were surface modified by Cr implantation with dosages of 5.0 × 10^16,1.5 × 10^17 and 3.0 × 10^17 ions/cm^2.X-ray diffraction method,which was already applied in studies on the microstructure of deformed and heat-treated materials,was used to study the crystal structure of the implanted steel,and the results were corrected with the hardness and wear *** solid solution strengthening effect and microstructure vary with increase in implantation *** to strong solid solution hardening of Cr,small average crystallite size and high dislocation density,the hardness and wear resistance of implanted steel with dose of 5.0 × 10^16 ions/cm^2 were found to be the highest compared with other ***,although the crystal lite size of the implanted sample with dose of 3 × 10^17 ions/cm^2 was similar to that of substrate and the dislocation density was lower than that of the substrate,its higher hardness and lower specific wear rate were due to the solid solution hardening and perhaps Cr clusters reinforcement.

关键词： X-ray diffraction method Ion implantation Dislocation density Hardness Wear Crystal structure

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Super‑elastic Scintillating Fibers and Fabrics for Efficient and Visual Radiation Detection

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Advanced Fiber Materials 2023年第4期5卷 1493-1504页

作者： Minghui Du Jin wang Sijia Xu Hongwei li Zhihao Zhang Yankun Qi Shichao Lv Jianrong Qiu Yurong Yan Shifeng Zhou State Key Laboratory of Luminescent Materials and Devices School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510641China Institute of Photonics technology Jinan UniversityGuangzhou 510632China National engineering Research Center of Novel Equipment for Polymer Processing School of Mechanical and Automotive EngineeringSouth China University of TechnologyGuangzhou 510641China Key Lab Guangdong High Property&Functional Polymer Materials School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510641China Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and DevicesGuangzhou 510641China college of Optical Science and engineering State Key Laboratory of Modern Optical InstrumentationZhejiang UniversityHangzhou 310027China

The fabrication of advanced radiation detectors is an important subject due to the wide use of radiation sources in scientific instruments,medical services,security check,non-destructive inspection,and nuclear ***,the manufacture of flexible and stretchable radiation detectors remains a ***,we report the scalable fabrication of super-elastic scintillating fibers and fabrics for visual radiation detection by thermal drawing and melt-spinning methods using styrene-b-(ethylene-co-butylene)-b-styrene,and scintillating Gd_(2)O_(2)S:Tb(GOS).Microstructure evolution,rheological properties,and radiation-composite interaction are studied to reveal the excellent processability,elasticity,and radiation detection ability of the fabricated *** from the physical crosslinking structural features of the polymer matrix and the excellent radiation absorption capacities of GOS,the resulting fiber can sustain high strains of 765%with a high content of GOS dopants(2 wt.%)and has excellent X-ray detection performance with the limit down to 53 nGy_(air)s^(-1).Furthermore,stretchable fabrics are constructed,and their applications in various fields,such as radiation warning,and X-ray imaging,are *** work not only provides a new type of super-elastic scintillating fibers and fabrics for smart textiles but also demonstrates their potential applications in the nuclear field.

关键词： Elastic fiber Radiation detection Optical materials X-ray imaging

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Milling Force Model for Aviation Aluminum Alloy: Academic Insight and Perspective Analysis

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Chinese Journal of mechanical engineering 2021年第1期34卷 54-88页

作者： Zhenjing Duan Changhe li Wenfeng Ding Yanbin Zhang Min Yang Teng Gao Huajun Cao Xuefeng Xu Dazhong wang Cong Mao Hao Nan li Gupta Munish Kumar Zafar Said Sujan Debnath Muhammad Jamil Hafiz Muhammad Ali School of mechanical and Automotive engineering Qingdao University of TechnologyQingdao 266520China college of mechanical and Electrical engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China State Key Laboratory mechanical Transmiss Chongqing UniversityChongqing 400044China Key Laboratory of Special Purpose Equipment and Advanced Processing technology Ministry of Educati on&Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310032China School of mechanical and Automotive engineering Shanghai University of Engineering ScienceShanghai 201620China college of Automotive and mechanical engineering Changsha University of Science and TechnologyChangsha 410114China School of Aerospace University of Nottingham Ningbo ChinaNingbo 315100China Key Lab High Efficiency and Clean Mech Manufacture Shandong UniversityJinan 250100China college of engineering University of Sharjah27272 SharjahUnited Arab Emirates mechanical engineering Department Curtin University98009 MiriMalaysia Mecha nical engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia

Aluminum alloy is the main structural material of aircraft,launch vehicle,spaceship,and space station and is processed by ***,tool wear and vibration are the bottlenecks in the milling process of aviation aluminum *** machining accuracy and surface quality of aluminum alloy milling depend on the cutting parameters,material mechanical properties,machine tools,and other *** particular,milling force is the crucial factor to determine material removal and workpiece surface ***,establishing the prediction model of milling force is important and difficult because milling force is the result of multiparameter coupling of process *** research progress of cutting force model is reviewed from three modeling methods:empirical model,finite element simulation,and instantaneous milling force *** problems of cutting force modeling are also *** view of these problems,the future work direction is proposed in the following four aspects:(1)high-speed milling is adopted for the thin-walled structure of large aviation with large cutting depth,which easily produces high residual *** residual stress should be analyzed under this particular condition.(2)Multiple factors(e.g.,eccentric swing milling parameters,lubrication conditions,tools,tool and workpiece deformation,and size effect)should be considered comprehensively when modeling instantaneous milling forces,especially for micro milling and complex surface machining.(3)The database of milling force model,including the corresponding workpiece materials,working condition,cutting tools(geometric figures and coatings),and other parameters,should be established.(4)The effect of chatter on the prediction accuracy of milling force cannot be ignored in thin-walled workpiece milling.(5)The cutting force of aviation aluminum alloy milling under the condition of minimum quantity lubrication(mql)and nanofluid mql should be predicted.

关键词： Milling Aluminum alloy Force model Empirical model Finite element model Instantaneous milling force model

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一种两自由度的压电-电磁复合能量收集器(英文)

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Journal of zhejiang university-Science A(Applied Physics & engineering) 2014年第9期15卷 711-722页

作者： Hong-yan wang li-hua TANG Yuan GUO Xiao-biao SHAN Tao XIE college of Computer and Control engineering Qiqihar University State Key Laboratory of Robotics and System Harbin Institute of Technology Department of mechanical engineering University of AucklandAuckland 1010 New Zealand

研究目的:对一种两自由度的压电-电磁复合能量收集器进行发电性能研究。创新要点:建立了一种两自由度压电-电磁复合能量收集器发电性能的数学模型,该数学模型可以评估两自由度压电-电磁复合能量收集器中压电元件、电磁元件以及系统总输... 详细信息

研究目的:对一种两自由度的压电-电磁复合能量收集器进行发电性能研究。创新要点:建立了一种两自由度压电-电磁复合能量收集器发电性能的数学模型,该数学模型可以评估两自由度压电-电磁复合能量收集器中压电元件、电磁元件以及系统总输出功率。研究方法:对一种两自由度的压电-电磁复合能量收集器进行数学建模,并实验验证数学模型的正确性。基于实验测试得到的系统参数值,理论研究压电元件和电磁元件的机电耦合系数对不同能量收集器发电性能的影响关系,并对几种能量收集器的发电能力进行对比分析。重要结论:对于非强耦合(弱或中间耦合)的两自由度机电转换器,复合能量收集器(压电+电磁)具有比单一能量收集器(压电或电磁)更高的发电能力。

关键词：振动复合能量收集两自由度模型压电电磁

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惯性力平衡式二维燃油泵的设计与研究

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航空学报 2022年第1期43卷 542-553页

作者：王河缘李胜阮健浙江工业大学机械工程学院杭州310000

提出了一种新型的惯性力平衡式二维燃油泵,该泵将配流机构集成在柱塞与柱塞环上,去除了传统柱塞泵独立的配流机构,简化了燃油泵的结构,并且利用柱塞与柱塞环方向相反的轴向往复运动,在体积不变的前提下增加了泵的排油行程,进一步提高了... 详细信息

提出了一种新型的惯性力平衡式二维燃油泵,该泵将配流机构集成在柱塞与柱塞环上,去除了传统柱塞泵独立的配流机构,简化了燃油泵的结构,并且利用柱塞与柱塞环方向相反的轴向往复运动,在体积不变的前提下增加了泵的排油行程,进一步提高了燃油泵的功率密度。该燃油泵的导轨采用等加等减速曲面,利用平衡导轨组进行与驱动导轨组加速度大小相等、方向相反的往复运动,来平衡在高转速情况下缸体受到的驱动导轨组给予的惯性力,提供了一种燃油泵高速化的可能性。结合泵的原理,分析了内泄漏、外泄漏以及油液的可压缩性对泵容积损失的影响。利用AMESIM建立惯性力平衡式二维燃油泵的仿真模型进行分析,与实验结果进行比对验证。样机试验表明,在负载压力为1 MPa时,转速从1000 r/min提升到7000 r/min,容积效率从90.6%提升到97.8%,理论偏差在3%左右;当转速为2000 r/min时,负载压力从1 MPa提高到6 MPa,容积效率从94.6%降低到87.5%,理论偏差在5%左右,说明了理论分析的正确性。

关键词：二维燃油泵惯性力平衡泄漏损失压缩损失 AMESIM 容积效率

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