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Structural engineering of high-entropy alloys for advanced electrocatalytic reactions

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Tungsten 2025年第1期 1-31页

作者： Qiao Xie Ying-Jie yu Hai-Jun Zhang ya-Ping Deng Wen lei The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Department of Chemical Engineering Waterloo Institute for Sustainable Energy Waterloo Institute for Nanotechnology University of Waterloo

High-entropy alloys(HEAs) have emerged as promising candidates to replace traditional precious metal catalysts,owing to their unique chemical and physical *** review commences by revisiting the fundamental concepts of HEAs,including their synthesis methods and structural control strategies in *** underscores the critical role of meticulously manipulating both macroscopic and microscopic structures of the HEAs to optimize their catalytic performance.A deep understanding of the structure-activity relationship in HEAs across various configurations is pivotal in developing more effective *** review methodically encapsulates the research progress of structural control strategies for HEAs in achieving efficient energy conversion,with the aim of gaining a better understanding of the relationship between structure and *** review concludes by summarizing the current achievements and challenges,and suggestions for potential future directions of HEAs in the fields of energy conversion and environmental purification.

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Analysis of Decadal Climate Variability in the Tropical Pacific by Coupled gCM

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Atmospheric and Oceanic Science letters 2011年第4期4卷 204-208页

作者： ZHANg ya-le yu Yong-Qiang State Key Laboratory of Numerical Modeling for Atmospheric Sciences and geophysical Fluid Dynamics （LASg） Institute of Atmospheric Physics （IAP） Chinese Academy of Sciences Beijing 100029 China gracluate University of the Chinese Academy of Sciences Beijing 100049 China

This study presents the spatial and temporal structures of the decadal variability of the Pacific from an extended control run of a coupled global climate model (gCM).The gCM used was version-g2.0 of the Flexible global Ocean Atmosphere Land System (FgOALS-g2.0) developed at LASg/*** gCM FgOALS-g2.0 re-produces similar spatial-temporal structures of sea surface temperature (SST) as observed in the Pacific decadal os-cillation (PDO) with a significant period of approximately 14 ***,the PDO signals were closely related to the decadal change both in the upper-ocean temperature anomalies and in the atmospheric *** present results suggest that warm SST anomalies along the equator relax the trade winds,causing the SSTs to warm even more in the eastern equatorial Pacific,which is a positive ***,warm SST anomalies along the equator force characteristic off-equa-torial wind stress curl anomalies,inducing much more poleward transport of heat,which is a negative *** upper-ocean meridional heat transport,which is asso-ciated with the PDO phase transition,links the equatorial to the off-equatorial Pacific Ocean,acting as a major mechanism responsible for the tropical Pacific decadal ***,the positive and negative feedbacks working together eventually result in the decadal oscilla-tion in the Pacific.

关键词： Pacific decadal oscillation coupled gCM air-sea interaction meridional heat transport

双轴应变对NbSe_(2)/MoSi_(2)N_(4)肖特基势垒的调控

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原子与分子物理学报 2025年第5期42卷 182-188页

作者：张宇哲安梦雅谢泉贵州大学大数据与信息工程学院新型光电子材料与技术研究所贵阳550025

最近一种高质量的二维(Two-dimensional,2D)半导体材料MoSi_(2)N_(4)(MSN)在实验上被成功合成,具有优异的电气和机械性能.尽管最近有大量的研究致力于揭示MSN的材料特性,但到目前为止,对MSN的电接触物理特性的探索还比较少.在这项工作中... 详细信息

最近一种高质量的二维(Two-dimensional,2D)半导体材料MoSi_(2)N_(4)(MSN)在实验上被成功合成,具有优异的电气和机械性能.尽管最近有大量的研究致力于揭示MSN的材料特性,但到目前为止,对MSN的电接触物理特性的探索还比较少.在这项工作中,构建了金属-半导体NbSe_(2)/MSN肖特基结并使用第一性原理密度泛函理论计算研究了该肖特基结的材料特性.发现NbSe_(2)/MSN接触具有超低肖特基势垒高度(Schottky barrier height,SBH),这有利于纳米电子学应用.SBH可以通过施加双轴应变的方式进行有效的调控.当施加拉伸应变时能实现NbSe_(2)/MSN肖特基结由p型肖特基接触转变为p型欧姆接触,而当施加较大的压缩应变时能实现p型肖特基接触和n型肖特基接触之间的转换.我们的研究结果为MSN的2D电触点的物理特性提供了见解,并将为设计基于MSN的2D纳米器件的高性能电触点提供关键的一步.

关键词： MoSi_(2)N_(4) NbSe_(2) 肖特基结欧姆接触

Three Nickel/maleonitriledithiolate Complexes Accompanied by Different Organic Molecules: Syntheses, Crystal Structures and Properties

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Chinese Journal of Structural Chemistry 2015年第6期34卷 965-972页

作者： yaN Wei-Hong SHEN Ming-le JI E-yu HUANg ya-Ping LIU Xue-guo Nanya.g Key Laboratory of Industrial Microbiology School of Biology and Chemical Engineering Nanyang Institute of Technology

Three complexes [AMP][Ni（mnt）2]·CH3CN （1, AMP = 1-（9-anthrylmethyl）pyri- dinium）, [DPI]2[Ni（nmt）2]I （2, DPI = diphenyliodonium） and [DD][Ni（mnt）2]2·2H2O （3, DD = dimethylenediamine） have been prepared and characterized by elemental analyses and IR spectroscopy. X-ray diffraction studies show that three complexes crystallize in the same triclinic space group Pi, and anionic accumulations are formed in a column shape. The results show that different counter-cations could induce versatile anionic stacks. The structures of three complexes exhibit rich hydrogen bonding interactions. In addition, UV-VIS properties of them are also investigated.

关键词： maleonitriledithiolate syntheses crystal structure

Dynamic Recrystallization Behavior of gCr15SiMn Bearing Steel during Hot Deformation

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Journal of Iron and Steel Research International 2014年第11期21卷 1042-1048页

作者： Dan ZHANg ya-zheng LIU le-yu ZHOU Qiang HAN Bo JIANg Zhong-zhi LI School of Material Science and Engineering University of Science and Technology Beijing Dongbei Special Steel group Corporation Limited

The hot deformation behavior of gCr15SiMn steel was studied through high temperature compression tests on the gleeble-1500 thermal-mechanical simulator. The initiation and evolution of dynamic recrystallization （DRX） were investigated with microstructural analysis and then the process variables were derived from flow curves. In the present deformation conditions, the curves of strain hardening exponent （n） and the true strain （e） at the deformation temperature of 1423 K and strain rates of 0.1, 1 and 10 s^-1 exhibit single peak and single valley. According to Zener-Hollomon and Ludwik equation, the experimental data have been regressed by using linear method. An expression of Z parameter and hot deformation equation of the tested steel were established. Moreover, the Q values of gCrlSSiMn and gCr15 steels were compared. In order to determine the recrystallization fraction under different con ditions, the volume fraction of DRX as a function of process variables, such as strain rate （ε）, temperature （T）, and strain （ε）, was established. Itwas found that the calculated results agreed with the mierostructure of the steel at any deformation conditions.

关键词： gCr15SiMn strain hardening exponent dynamic recrystallization critical strain kinetic model

Dynamic evolution of Co species and morphological reconstruction on Co-N-C during the nitrate reduction reaction in neutral solution

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Nano Research 2025年第1期18卷 164-172页

作者： yuanlin Fu Xiaoting ya.g ya yu Kang Zhou Xiaoya.g Ye Aoxiang Zhang Xiaojiao Hou Bingbing Chen Fuqiang Fan yuhang Li yu Fu Department of Chemistry College of SciencesNortheastern UniversityShenyang 110819China Department of Physical Education Shen Yang Institute of Science and TechnologyShenyang 110167China Sungrow Power Supply Co. Ltd.Hefei 230088China

The electrochemical nitrate reduction reaction(eNO_(3)^(-)RR)is considered an effective approach for converting nitrate-containing wastewater to *** adsorption and activation of NO_(3)^(-)is the critical step for many materials and the high energy barrier inhibits the continuation of the reduction *** Co nanoparticles encapsulated in the carbon layer we prepared spontaneously react with NO_(3)^(-)and the resulting Co^(2+)is then reduced by electroreduction to Co^(0),which circulates *** resulted in overcoming the energy input required for NO_(3)^(-)adsorption and conversion,thereby increasing the catalytic *** the same time,the morphology of the catalyst reconstructed from a dodecahedron to an interwoven nanosheet structure and the increased surface area also gives it better *** obtained Co(OH)_(2)@Co-N-C has an excellent eNO_(3)^(-)RR of 2774.7μg·h^(-1)·cm^(-2)with a Faraday efficiency of 81.4%in neutral *** the same time,the material-modified electrode can run stably for more than 100 *** work provides a new idea for the design of Co-based catalysts for eNO_(3)^(-)RR.

关键词： electrochemical nitrate reduction reaction Co-based catalyst dynamic evolution of Co species morphological reconstruction

Rational design and synthesis of advanced metal-organic frameworks for electrocatalytic water splitting

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Science China Chemistry 2023年第4期66卷 943-965页

作者： yu-Jia Tang ya-Qian Lan School of Chemistry and Materials Science Institute of Advanced Materials and Flexible Electronics(IAMFE)Nanjing University of Information Science and TechnologyNanjing 210044China School of Chemistry South China Normal UniversityGuangzhou 510006China

As a promising and significant technology for hydrogen production,electrocatalytic water splitting is a research hotspot in the energy conversion field for alleviating the global energy crisis and achieving carbon neutrality ***-organic frameworks(MOFs)have been widely investigated as catalyst candidates with remarkable activity and long-term electrocatalysis durability owing to their precise and tailorable structures:tunable pore channels in the range of micropore/mesopore promote the mass/electron transfer;high specific surface areas expose abundant active species;modified metal nodes can serve as active sites;versatile organic ligands can be functionalized to further enhance the electrocatalytic *** this review,recent advances in the rational design and synthesis of advanced MOF electrocatalysts for water splitting are presented in the following ***,we analyze the design concepts of MOF electrocatalysts from the perspective of their distinct and modifiable ***,three common synthesis techniques of MOF electrocatalysts are briefly ***,we focus on the classification of different MOFs for robust electrocatalytic water splitting,including pristine MOFs,mixed-metallic MOFs,MOF nanosheets,electrically conductive MOFs,MOFs on substrates,and polyoxometalate-based ***,summary and outlook are proposed to uncover the next generation of advanced MOFs for electrochemical energy conversion applications.

关键词： metal-organic frameworks water splitting electrocatalysis hydrogen evolution reaction oxygen evolution reaction polyoxometalates

Supersymmetric Sawada-Kotera-Ramani Equation: Bilinear Approach

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Communications in Theoretical Physics 2008年第3期49卷 685-688页

作者： yu ya-Xuan Department of Mathematics Ningbo University Ningbo 315211 China

In this paper, using the Hirota＇s bilineax method, we consider the N = 1 supersymmetric Sawada-Kotera- Ramani equation and obtain the Bazcklund transformation of it. Its one- and two-supersoliton solutions axe obtain... 详细信息

关键词： N = 1 supersymmetric Sawada-Kotera-Ramani equation Backlund transformation supersoliton solutions

New Compacton Solutions and Solitary Pattern Solutions for Modified Nonlinearly Dispersive mK(m,n,a,b) Equation

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Communications in Theoretical Physics 2009年第10期52卷 637-640页

作者： yu ya-Xuan Department of Applied Mathematics Ningbo University Ningbo 315211 China

In this paper exact solutions of a new modified nonlinearly dispersive equation （simply called inK（m, n, a, b） Ua Ub equation）, u^m-1 ut ＋ α（ u^n）x ＋β（u^a（u^b）xx）x = 0, is investigated by using some direct algorithms. As a result, abundant new compacton solutions （solitons with the absence of infinite wings） and solitary pattern solutions （having infinite slopes or cusps） are obtained.

关键词： mK(m n a b) equation compacton solution solitary pattern solution