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Recent advances in the electrochemistry of layered post-transition metal chalcogenide nanomaterials for hydrogen evolution reaction

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Journal of Energy Chemistry 2021年第9期30卷 451-479页

作者： Yong Wang Yang Zhao xiang ding Liang Qiao School of Physics University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina

Layered two-dimensional(2 D)materials have received tremendous attention due to their unique physical and chemical properties when downsized to single or few *** types of layered materials,especially transition metal dichalcogenides(TMDs)have been demonstrated to be good electrode materials due to their interesting physical and chemical *** from TMDs,post-transition metal chalcogenides(PTMCs)recently have emerged as a family of important semiconducting materials for electrochemical *** are layered materials which are composed of post-transition metals raging from main group IIIA to group VA(Ga,In,Ge,Sn,Sb and Bi)and group VI chalcogen atoms(S,selenium(Se)and tellurium(Te)).Although a large number of literatures have reviewed the electrochemical and electrocatalytic applications of TMDs,less attention has been focused on *** this review,we focus our attention on PTMCs with the aim to provide a summary to describe their fundamental electrochemical properties and electrocatalytic activity towards hydrogen evolution reaction(HER).The characteristic chemical compositions and crystal structures of PTMCs are firstly discussed,which are different from ***,inherent electrochemistry of PTMCs is discussed to unveil the well-defined redox behaviors of PTMCs,which could potentially affect their efficiency when applied as electrode ***,we focus our attention on electrocatalytic activity of PTMCs towards HER including novel synthetic strategies developed for the optimization of their HER *** review ends with the perspectives for the future research direction in the field of PTMC based electrocatalysts.

关键词： Post-transition metal chalcogenide Layered material Chemical composition Crystal structure Inherent electrochemistry Hydrogen evolution

EXPERIMENTAL AND NUMERICAL INVESTIGATIONS ON SECONDARY FLOWS AND SEDIMENTATIONS BEHIND A SPUR DIKE

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Journal of Hydrodynamics 2007年第1期19卷 23-29页

作者： TANG Xue-lin ding xiang CHEN Zhi-cong College of Water Conservancy and Civil Engineering China Agricultural University Beijing 100083 China Department of Hydraulic Engineering Tsinghua University Beijing 100084 China

For a physical model of the approach navigation channel of Three Gorges Project（TGP）, flow patterns around a non-submerged spur dike placed as a mountain in a long rectangular glass flume were experimentally investigated with and without ＂sucking-spouting＂ water respectively. Based on rigid lid assumption and Dynamic Smagorinsky Model, all these vortex flows around the spur dike were numerically simulated and analyzed, which probably affect the whole flow field and then probably lead to sedimentations for silt-laden two-phase flows. Meanwhile, silt-laden flows were also investigated experimentally. Both the secondary flow region and the silt sedimentations downstream of the spur dike decrease greatly with ＂sucking-spouting＂ water compared to those ones without ＂sucking-spouting＂ water. The Finite Volume Method （FVM） was used to discretize the governing equations together with a staggered grid system, where the second order difference is employed for the diffusion terms and the source terms while the upwind difference QUICK is used for the convection terms. The computational results are all in fairly good agreement with the experimental data.

关键词： Three Gorges Project (TGP) "sucking-spouting" water spur dike silt-laden flow rigid lid assumption,dynamic large eddy simulations

Structure of Micro-nano WC-10Co4Cr Coating and Cavitation Erosion Resistance in NaCl Solution

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Chinese Journal of Mechanical Engineering 2017年第5期30卷 1239-1247页

作者： xiang ding Xu-Dong Cheng Cheng-Qing Yuan Jin Shi Zhang-Xiong ding State Key Laboratory of Advanced Technology for Materials and Processing Wuhan University of Technology School of Energy and Power Engineering Wuhan University of Technology

Cavitation erosion （CE） is the predominant cause for the failure of overflow components in fluid machinery. Advanced coatings have provided an effective solution to cavitation erosion due to the rapid development of surface engineering techniques. However, the influence of coating structures on CE resistance has not been sys- tematically studied. To better understand their relationship, micro-nano and conventional WC-10Co4Cr cermet coat- ings are deposited by high velocity oxygen fuel spray- ing（HVOF）, and their microstructures are analyzed by OM, SEM and XRD. Meanwhile, characterizations of mechan- ical and electrochemical properties of the coatings are carried out, as well as the coatings＇ resistance to CE in 3.5 wt % NaC1 solution, and the cavitation mechanisms are explored. Results show that micro-nano WC-10Co4Cr coating possesses dense microstructure, excellent mechanical and electrochemical properties, with very low porosity of 0.26 4-0.07% and extraordinary fracture toughness of 5.58 4-0.51 MPa.m1/2. Moreover, the CE resistance of micro-nano coating is enhanced above 50% than conventional coating at the steady CE period in 3.5 wt % NaC1 solution. The superior CE resistance of micro- nano WC-10Co4Cr coating may originate from the unique micro-nano structure and properties, which can effectively obstruct the formation and propagation of CE crack. Thus,a new method is proposed to enhance the CE resistance of WC-10Co4Cr coating by manipulating the microstructure.

关键词： Cavitation erosion resistance Micro-nanostructure - WC- 10Co4Cr coating HVOF

Graphene aerogel supported Pt-Ni alloy as efficient electrocatalysts for alcohol fuel oxidation

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Chinese Chemical Letters 2022年第5期33卷 2687-2691页

作者： xiang ding Meng Li Junling Jin Xiaobing Huang xiang Wu Ligang Feng Hunan Provincial Key Laboratory of Water Treatment Functional Materials College of Chemistry and Material EngineeringHunan University of Arts and ScienceChangde 415000China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China

Alcohol fuels oxidation plays a significant role in carbon sustainable cycling and high-performance cata-lyst with a strong anti-poisoning effect is ***,Pt-Ni alloy supported on the N-doped graphene aerogel synthesized by simple freeze-drying and annealing was demonstrated to have such catalytic abil-ity for alcohol fuel ***-Ni alloy particles were found uniformly dispersed over the surface of 3D N-doped graphene *** anti-poisoning ability for CO-like intermediates oxidation was demon-strated by the CO-stripping *** as-prepared catalyst was found to have outstanding catalytic performance for methanol and ethanol oxidation with high catalytic activity,stability and catalytic *** to the control samples,the improved catalytic ability could be due to the presence of oxophilic Ni species and the support effect of 3D N-doped graphene aerogel that combined multi-advantages of large surface area,facile mass transfer,and abundant defects.

关键词： PtNi Fuel cells reaction Graphene aerogel Anti-poisoning effect CO-stripping

Optimal risk allocation in alliance infrastructure projects: A social preference perspective

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Frontiers of Engineering Management 2022年第2期9卷 326-336页

作者： xiang ding Qian LI School of Government Nanjing UniversityNanjing 210023China School of Engineering Management Nanjing UniversityNanjing 210023China

The mechanism of risk allocation is designed to protect all stakeholders,and it is vital to project *** and quantitative ways of optimizing risk allocation have been well documented in extant literature(e.g.,allocation principles,models,and solutions),and the foci of existing research are usually the maximization of rational *** research has focused on partners’social preferences affecting the output of risk *** study presents a quantitative approach based on modeling alliance member(AM)’s inequity aversion(IA)to analyze risk-sharing arrangements in an alliance *** and Schmidfs inequity-aversion model is integrated into modeling partner’s *** paper derives results for an alliance leader(AL)’s optimal risk-sharing ratio and AM's optimal risk-management effort *** derivation is based on solving a restrained optimization problem using the conception and methods from Stackel-berg game *** show that an AM’s IA significantly affects risk allocation between AL and ***,envious preference is positively related to AL5s optimal risk-sharing ratio,whereas guilty preference negatively affects AL5s optimal risk-sharing *** findings will be of interest to academics and practitioners involved in designing alliance negotiations.

关键词： public project contract design risk sharing inequity aversion governance

Study on Technique of Surface Plasmon Resonance Imaging Sensing for Biomolecular Interaction

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稀有金属材料与工程 2006年第A3期35卷 483-487页

作者： ding xiang Rong Xiaofeng Deng Yan Yu Xinglong Dept. of Precision Instrument Tsinghua University Beijing 100084 China

High resolution of surface plasmon resonance (SPR) detection is of vital *** biosensing system resolution is determined by intrinsic sensitivity of biochip and light signal acquisition *** this article,different signal acquisition system resolutions on photodetector were analyzed based on light intensity and phase *** shows that charge coupled device (CCD) with larger numbers of pixels is potential to achieve higher detection resolution.A 64 pixel line array CCD and a 12 bit ADC can achieve resolution of 10^(-7) refractive index unit (RIU).In array detection mode,increasing of detection throughput is at the cost of decreasing system *** analysis indicates that,if noise is taken into account,phase modulation methods are capable of providing better noise reduction performance than intensity methods.

关键词： SPR biosensing intensity detection phase detection resolution

Quantum Currents in the coset Space SU(2)/U(1)

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Communications in Theoretical Physics 2002年第1期37卷 59-62页

作者： ding xiang-Mao Hou Bo-Yu Zhao Liu Institute of Applied Mathematics Academy of Mathematics and System Sciences Academia Sinica P.O. Box 2734 Beijing 100080 China Institute of Modern Physics Northwest University Xi'an 710069 China

We propose a rational quantum deformed nonlocal currents in the homogeneous space SU(2)k/U(1), and in terms of it and a free boson field a representation for the Drinfeld currents of Yangian double at a general level k = c is obtained. In the classical limit h → 0, the quantum nonlocal currents become SU(2)k parafermion, and the realization of Yangian double becomes the parafermion realization of SU(2)k current algebra.

关键词：量子理论仿射李代数量子流 SU(2)/U(1)空间

New Algebraic Structures from Hermitian One-Matrix Model

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Acta Mathematica Sinica,English Series 2017年第9期33卷 1193-1205页

作者： xiang Mao ding Yu Ping LI Ling Xian MENG Institute of Applied Mathematics Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190P.R.China College of Mathematics and Information Science Zhengzhou University of Light IndustryZhengzhou 450002P.R.China

Virasoro constraint is the operator algebra version of one-loop equation for a Hermitian one-matrix model, and it plays an important role in solving the model. We construct the realization of the Virasoro constraint from the Conformal Field Theory （CFT） method. From multi-loop equations of the one-matrix model, we get a more general constraint. It can be expressed in terms of the operator algebras, which is the Virasoro subalgebra with extra parameters. In this sense, we named as generalized Virasoro constraint. We enlarge this algebra with central extension, this is a new kind of algebra, and the usual Virasoro algebra is its subalgebra. And we give a bosonic realization of its subalgebra.

关键词： Matrix model Virasoro constraint conformal symmetry

A case report of severe Aspergillus flavus penile infection

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Asian Journal of Andrology 2009年第5期11卷 638-640页

作者： Bing-Kun Li xiang Wang Qiang ding Department of Urology Huashan Hospital Fudan University Shanghai 200040 China

Dear Sir, My name is xiang Wang, from the Department of Urology of Huashan Hospital at Fudan University in China. In this letter, we present our experience with the diagnosis and treatment of a patient with severe penile aspergillosis. Fungus is a common pathogen that can cause balanoposthitis. Candida albicans is considered to be the most common pathogen that causes balanoposthitis,

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