检索结果-南通市图书馆

High-entropy alloy stabilized and activated Pt clusters for highly efficient electrocatalysis

SusMat 2022年第2期2卷 186-196页

作者： Wenhui Shi Hanwen Liu Zezhou Li Chenghang Li Jihan Zhou Yifei Yuan Feng Jiang (Kelvin)Kun Fu Yonggang Yao State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanP.R.China Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular EngineeringPeking UniversityBeijingP.R.China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhouP.R.China Sustainable Functional Biomaterials Lab Department of Wood ScienceUniversity of British ColumbiaVancouverCanada Department of Mechanical Engineering University of DelawareNewarkUSA

Although Pt and other noble metals are the state-of-the-art catalysts for various energy conversion applications,their low reserve,high cost,and instability limit their large-scale utilization.Herein,we report a hybrid catalysts design featuring noble metal clusters(e.g.,Pt)uniformly dispersed and stabilized on high-entropy alloy nanoparticles(HEA,e.g.,FeCoNiCu),denoted as HEA@Pt,which is prepared via ultra-fast shock synthesis(∼300 ms)for HEA alloying combined with Pt galvanic replacement for surface anchoring.In our design,the HEA core critically ensures high dispersity,stability,and tunability of the surface Pt clusters through high entropy stabilization and core-shell interactions.As an example in the hydrogen evolution reaction,HEA@Pt achieved a significant mass activity of 235 A/gPt,which is 9.4,3.6,and 1.9-times higher compared to that of homogeneous FeCoNiCuPt(HEA-Pt),Pt,and commercial Pt/C,respectively.We also demonstrated noble Ir stabilized on FeCoNiCrMn nanoparticles(HEA-5@Ir),achieving excellent anodic oxygen evolution performance and highly efficient overall water splitting when combined with the cathodic HEA@Pt.Therefore,our work developed a general catalysts design strategies by using high entropy nanoparticles for effective dispersion,stabilization,and modulation of surface active sites,achieving a harmonious combination of high activity,stability,and low cost.

关键词： entropy stabilization high entropy alloy catalysts hybrid structure hydrogen evolution reaction overall water splitting

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

hybrid ZnO@Au Nanorod Array for Fast and Repeatable Bacteria Inactivation

引用

Chinese Journal of Chemistry 2023年第17期41卷 2132-2142页

作者： Yu Liu Xiaoyu Zhao Xiaosa Zhang Xiaodan Jia Lie Wu Xiue Jiang College of Science Shenyang University of Chemical TechnologyShenyangLiaoning 110142China Shenyang National Laboratoryfor Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyangLiaoning 110016China State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of Scienc ChangchunJilin 130022China

Comprehensive Summary,The worldwide abuse of antibiotics and resultant antimicrobial resistance made the development of new antibacterial materials an urgent and significant issue.Herein,a hybrid ZnO@Au nanorod array with fast bacterial inactivation and excellent recyclability was reported.93%bacteria could be inactivated within 5 min ultra-sonication under indoor daylight,and the killing rate maintains above 90%after seven repeated using cycles.Antibacterial mechanism involves extracellular reactive oxygen species(ROS)generated from photocatalysis and piezoelectricity of nanorod array,intracellular ROS generation and decrease of adenosine-triphosphate(ATP)originated from electron transfer(ET)from bacteria to nanorod array,as well as mechanical effect from the nanorod,among which ET mechanism plays a major role.Large Schottky barrier from the hybrid interface not only enhances the ROS generation by promoting the charge transfer and carrier separation as well as light utilization,but also enables one-direction electron transfer from bacteria to nanorod array.The resultant continuous electron loss breaks the energy metabolism and disturbs the redox equilibrium,leading to bacterial death.This study demonstrates the great potential of hybrid structure in antibacterial applications and indicates ET as a novel effective antibacterial mechanism for semiconductor materials,which provides insights into the design of next-generation antibacterial materials.

关键词： Antibacterial hybrid structure Zinc oxide nanorod Electron transfer Reactive oxygen species Microarrays Nanocomposites Semiconductors

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ultra-low concentration of total organic carbon in ultrapure water using ion-exchange resin embedding silanized magnetic nanoparticles

引用

Journal of Environmental Sciences 2020年第6期32卷 11-17页

作者： Jung Joon Lee Jihyeon Park Bo-Hyun Kim Sunjong Lee Department of Advanced Materials Science and Engineering Sungkyunkwan UniversitySuwon 16419South Korea Korea Institute of Industrial Technology 89 Yangdaegiro-gilIpjang-myeonCheonan-si 31056South Korea

Regeneration of pure water is an important issue not only for the healthy life but also for the fine control of precise processes in various industries.One important issue in ultrahigh purified water is to reduce the amount of total organic carbon(TOC).Herein,we introduce a new approach to reduce the TOC using the surface silanized nanoparticles,in which the magnetic nanoparticles(mNPs)are silanized and then complexed with ion exchange resin(IER)beads.The Fe3O4 mNPs are surface modified by using high concentrated vinyltrimethoxysilane(VTMS)and then adhered on the surface of IER beads.The surface modified mNPs have a thick-shell of polysiloxane layer varying from 5 to 22 nm depending on the amount of VTMS used,which leads the significant increase of specific surface area.The IER beads embedding VTMS-silanized mNPs achieves about 7μg/L of the TOC level in ultrapure water system,which is two orders less than 228μg/L of the feeding water and one order less than 96μg/L from the system using pristine IER beads.This result is mainly attributed to the polysiloxane layer forming broccoli-like surface structure and some part by the vinyl group of VTMS exposed to the amines in the water.

关键词： Total organic carbon Ultrapure water Magnetic nanoparticle Ion-exchange resin hybrid structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Enlarged Stable Phase Region of hybrid Lamella-sphere Phase Enabled by A_(1)B_(1)A_(2)(B_(2))m Branched Tetrablock Copolymer

引用

Chinese Journal of Polymer Science 2021年第7期39卷 925-933页

作者： Bin Zhao Mei-Jiao Liu Chao Wang Ying-Cai Chen Yu-Ci Xu Department of Physics Taizhou UniversityTaizhou 318000China Key Laboratory of Computational Physical Science Fudan UniversityShanghai 200433China Department of Chemistry Zhejiang Sci-Tech UniversityHangzhou 310018China Faculty of Materials Science and Chemical Engineering Ningbo UniversityNingbo315211China

hybrid nanostructures possess a great potential for application in advanced nanotechnologies due to the anisotropic properties from different nanophases.Our previous work demonstrated that a linear A_(1)B_(1)A_(2)B_(2)tetrablock copolymer of symmetric overall volume fraction can self-assemble into a hybrid lamella-sphere(LS)structure by tuning the relative length of the two A-blocks through self-consistent field theory(SCFT),where the spherical and the lamellar domains are mainly composed of the long Ar and short A2-blocks,respectively.However,the phase region of LS is limited.In order to expand the stable region of LS,we change the linear A2B2 copolymer to a branched A_(1)B_(1)A_(2)B_(2)copolymer resulting in an increase of the local spontaneous curvature between A2-and B2-blocks.We examine the impact of the branching number m of 62-block on the stable region of LS in the phase diagram with respect to f_(A1)and for fixed f_(B)=0.5 and f_(B1)=0.26,and find that m=2 expands the LS region significantly in contrast to the linear architecture.On the other hand,the stability window of LS does not change notably when m=2 is increased to 3 in our calculated parameter space.

关键词： Block copolymer Self-assembly Self-consistent field theory hybrid structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Structural engineering of transition metal-based nanostructured electrocatalysts for efficient water splitting

引用

Frontiers of Chemical Science and Engineering 2018年第4期12卷 838-854页

作者： Yueqing Wang Jintao Zhang Key Laboratory for Colloid and Interface Chemistry (Ministry of Education) School of Chemistry and Chemical EngineeringShandong University Jinan 250100China

Water splitting is a highly promising approach for the generation of sustainable, clean hydrogen energy. Tremendous efforts have been devoted to exploring highly efficient and abundant metal oxide electrocatalysts for oxygen evolution and hydrogen evolution reactions to lower the energy consumption in water splitting. In this review, we summarize the recent advances on the development of metal oxide electrocatalysts with special emphasis on the structural engineering of nanostructures from particle size, composition, crystalline facet, hybrid structure as well as the conductive supports. The special strategies relay on the transformation from the metal organic framework and ion exchange reactions for the preparation of novel metal oxide nanostructures with boosting the catalytic activities are also discussed. The fascinating methods would pave the way for rational design of advanced electrocatalysts for efficient water splitting.

关键词： water splitting structure engineering metal organic framework ion exchange synergistic effect hybrid structure conductive supports

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ANALYTICAL ANALYSIS OF INTERFACIAL STRESSES IN FRP-RC hybrid BEAMS WITH TIME-DEPENDENT DEFORMATIONS OF RC BEAM

引用

Acta Mechanica Solida Sinica 2011年第6期24卷 519-526页

作者： Bouazza Fahsi Kouider Halim Benrahou Baghdad Krour Abdeloauhed Tounsi Samir Benyoucef1 E Abbas Adda Bedia Laboratoire des Matériaux et Hydrologie Université de Sidi Bel Abbes BP 89 Cité Ben M'hidi 22000 SidiBel Abbes Algéri Universitaire Mustapha Stambouli Mascara Département de Génie Civil Algérie Laboratoire des Matériaux et Hydrologie Université de Sidi Bel Abbes BP 89 Cité Ben M’hidi 22000 SidiBel Abbes Algérie

In this paper, the effect of time-dependent deformations （such as shrinkage and creep） on the interracial stresses between an RC beam and FRP plate is presented. For this end, a closed-form solution for such stresses in externally FRP plated RC beams including creep and shrinkage effects is presented. The developed model is formulated to predict the interfacial stresses at time ＇t＇, in which the RC beams have been already subjected to creep and shrinkage effects. The adherend shear deformations have been included in the present theoretical analysis by assuming a parabolic shear stress through the thickness of the RC beam and the FRP panel. Contrary to some existing studies, the assumption that both RC beam and FRP panel have the same curvature is not used in the present investigation. This research is helpful for the understanding on mechanical behavior of the interface and design of the FRP-RC hybrid structures.

关键词： hybrid structure RC beams FRP composites interfacial stresses creep shrinkage

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Experimental study on seismic behavior of semi-rigid connection between steel beam and concrete wall

引用

Earthquake Engineering and Engineering Vibration 2005年第1期4卷 129-137页

作者：刘爱民周德源 Institute of Structural Engineering and Disaster Reduction Tongji University Shanghai 200092ChinaPh.D.Candidate Institute of Structural Engineering and Disaster Reduction Tongji University Shanghai 200092China Professor

Beam-column or beam-wall connections are an important problem in high-rise buildings. In this study, based on the analysis of an example structure, an analytical model for design of the semi-rigid connections between steel beams and RC walls in high-rise hybrid buildings is proposed. Also, the mechanical characteristics of these connections subjected to low-reversed cyclic loading are investigated through comparison of experimental results from three semi-rigid connections and two rigid connections. Moreover, some latent problems for design of these connections as well as the corresponding solutions are discussed. The results from the experiments and analyses indicate that semi-rigid connections exhibit satisfactory capacity and seismic performance, and the proposed design can be used in practice.

关键词： Key words high rise building hybrid structure beam wall connection seismic performance experiment study

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Seismic Vulnerability Analysis of High-Rise Composite Frame Concrete Tube Composite structure

Seismic Vulnerability Analysis of High-Rise Composite Frame ...

引用

作者： Shuyun Zhang Jie Zhou Yonglei Hao School of Architecture and Civil Engineering Xi’an University of Science and Technology

In order to study the possibility of structural failure of high-rise composite frameconcrete tube structure under different earthquake intensity,seismic vulnerability analysis of the structure is carried out based on IDA principle,and its seismic performance is evaluated.Taking 30-storey high-mixing structure as an example,eight seismic records are selected.After amplitude modulation,non-linear dynamic time history analysis is carried out.PGA,PGV and Sa are selected as seismic intensity parameters,and the maximum inter-storey displacement angle is selected as structural performance index.IDA curve clusters are obtained.Quantile curve method is used to analyze and analyze the results.It is concluded that PGA strength index is more effective.The seismic performance of this kind of structure is evaluated effectively,and then the vulnerability curve and vulnerability matrix are obtained.The analysis results show that the hybrid structure can meet the requirements of "three-level" seismic response and has good seismic performance under 8-degree frequent,basic and rare earthquakes.

关键词： hybrid structure incremental dynamic analysis vulnerability curve seismic performance

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

EXPERIMENTAL STUDY ON RIGID CONNECTION BETWEEN STEEL BEAM AND CONCRETE WALL

EXPERIMENTAL STUDY ON RIGID CONNECTION BETWEEN STEEL BEAM AN...

引用

The International Symposium on Innovation & Sustainability of structures in Civil Engineering

作者： Jian Zhu Shaobin Dai and Zhean Lu College of Civil Engineering and Architecture Wuhan University of Technology Wuhan 430070 China Hubei Key Laboratory of Roadway Bridge & structure Engineering Wuhan University of Technology Wuhan 430070 China

＜正＞In order to investigate the behavior of rigid connection between steel beam and concrete wall in steel frame-concrete wall hybrid structure, a cyclic loading experiment was carried out. In the experiment, three subassemblies that involve a portion of the wall, connection and steel beam were fabricated and tested.The cyclic moment and shear force borne by the connection were simulated by use of cyclic loads which was applied on the steel beam.The experiments showed that the quality of the welding seam between the flange girth of the steel beam and the seal plate is important to the cyclic performance of the connection.Moreover, the anti-slip performance of the high strength bolt connection between the web plate of steel beam and the connecting plate will affect the performance of the connection in certain degree. Based on the test results, several conclusions were presented and the relevant design suggestions about the connection are given in the paper.

关键词： Steel beam concrete wall rigid connection hybrid structure joint cyclic load high strength bolts connecting plate

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：