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Oxygen reduction electrocatalysis:From.conventional to single-atom.c platinum.based catalysts for proton exchange m.m.rane fuel cells

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Frontiers in Energy 2024年第2期18卷 206-222页

作者： cheng YUAN shim.ng zhang Jiujun zhang Institute for sustainable Energy/College of sciences Shanghai UniversityShanghai 200444China

Platinum.Pt)-based m.terials are still the m.st efficient and practical catalysts to drive the sluggish kinetics of cathodic oxygen reduction reaction(ORR)in proton exchange m.m.rane fuel cells(PEm.Cs).however,their catalysis and stability perform.nce still need to be further im.roved in term. of corrosion of both carbon support and Pt catalyst particles as well as Pt loading *** on the developed synthetic strategies of alloying/nanostructuring Pt particles and m.difying/innovating supports in developing conventional Pt-based catalysts,Pt single-atom.catalysts(Pt sACs)as the recently burgeoning hot m.terials with a potential to achieve the m.xim.m.utilization of Pt are com.rehensively reviewed in this *** design thoughts and synthesis of various isolated,alloyed,and nanoparticlecontained Pt sACs are *** single-atom.c Pt coordinating with non-m.tals and alloying with m.tals as well as the m.tal-support interactions of Pt single-atom. with carbon/non-carbon supports are em.hasized in term. of the ORR activity and stability of the *** advance further research and developm.nt of Pt sACs for viable im.lem.ntation in PEm.Cs,various technical challenges and several potential research directions are outlined.

关键词： oxygen reduction electrocatalysis Pt singleatom.catalysts conventional Pt-based catalysts design thoughts and synthesis m.tal-support interactions

hall Algebras Associated to Com.lexes of Fixed size

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Acta m.them.tica sinica,English series 2022年第5期38卷 907-923页

作者： hai cheng zhang s.h.ol of m.them.tical sciences Nanjing Normal UniversityNanjing 210023P.R.China

Let A be a finitary hereditary abelian category with enough *** study the hall algebra of com.lexes of fixed size over ***,we first give a relation between hall algebras of com.lexes of fixed size and cyclic ***,we characterize the hall algebra of com.lexes of fixed size by generators and relations,and relate it to the derived hall algebra of ***,we give the integration m.p on the hall algebra of 2-term.com.lexes over projectives.

关键词： Bridgeland hall algebra derived hall algebra com.lex of fixed size

EFFECTs OF DIFFERENT FUNCTIONAL GROUP-CONTAINING ORGANICs ON m.RPhOLOGY-CONTROLLED sYNThEsIs OF sILVER NANOPARTICLEs AT ROOm.TEm.ERATURE

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Acta m.tallurgica sinica(English Letters) 2006年第5期19卷 362-370页

作者： A.L. Wang h.B. Yin m. Ren X.N. cheng Q.F. Zhou X.F. zhang Faculty of Chem.stry and Chem.cal Engineering Jiangsu University Zhenjiang 212013 China Departm.nt of Chem.cal Engineering Jiangsu Teachers University of Technology Changzhou 213001China

silver nanoparticles with average particles sizes ranging from.2 to 131nm.were m.nipulatively synthesized starting from.silver nitrate using different functional group-containing organic m.difiers at room.tem.erature. The effects of the organic m.difiers on the m.rphology of the resulting silver nanoparticles were strongly dependent on the intrinsic properties of the functional groups and the reducibility of the reductant. Num.rous ether bonds （-0-）present in polyethylene glycol and Tween-80 were beneficial to the form.tion of silver nanoparticles with particle sizes of several nanom.ters in a narrow size distribution in both weak and strong reducing environm.nts. Cetyltrim.thylam.onium.brom.de induced the form.tion of nanosized silver triangle plates in a weak reducing environm.nt. The crystal growth of the silver nanoparticles with particle sizes of m.re than lOnm.was postulated through an adhesion process of sm.ll-sized particles followed by a subsequent coalescence process under the present reaction conditions.

关键词： silver nanoparticle nanostructure crystal growth TEm.(transm.ssionelectron m.croscopy)

On PID Control Theory for Nonaffine Uncertain stochastic system.

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Journal of system. science & Com.lexity 2023年第1期36卷 165-186页

作者： zhang Jinke ZhAO cheng GUO Lei Key Laboratory of system. and Control Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China s.h.ol of m.them.tical science University of Chinese Academy of SciencesBeijing 100049China

PID(proportional-integral-derivative)control is recognized to be the m.st widely and successfully em.loyed control strategy by ***,there are lim.ted theoretical investigations explaining the rationale why PID can work so well when dealing with nonlinear uncertain *** paper continues the previous researches towards establishing a theoretical foundation of PID control,by studying the regulation problem.of PID control for nonaffine uncertain nonlinear stochastic *** be specific,a three dim.nsional param.ter set will be constructed explicitly based on som. prior knowledge on bounds of partial derivatives of both the drift and diffusion *** will be shown that the closed-loop control system.will achieve exponential stability in the m.an square sense under PID control,whenever the controller param.ters are chosen from.the constructed param.ter ***,sim.lar results can also be obtained for PD(PI)control in som. special cases.A num.rical exam.le will be provided to illustrate the theoretical results.

关键词： Asym.totically regulation global stability nonaffine PID control stochastic system. uncertain structure

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Dielectric-ion-conductive ZnNb2O6 layer enabling rapid desolvation and diffusion for dendrite-free Zn m.tal batteries

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Journal of Energy Chem.stry 2025年第1期 693-701页

作者： haifeng Yang Jian Wang Panpan zhang Xiaom.n cheng Qinghua Guan Jing Dong Bixian Chen Lujie Jia Jing zhang Yongzheng zhang Yunjian Liu hongzhen Lin s.h.ol of m.terials science and Engineering Jiangsu University i-Lab & CAs Key Laboratory of Nanophotonic m.terials and Devices Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences helm.oltz Institute Ulm.(hIU) Karlsruhe Institute of Technology (KIT) s.h.ol of m.terials science and Engineering Xi'an University of Technology state Key Laboratory of Chem.cal Engineering East China University of Science and Technology

Rechargeable aqueous zinc-m.tal batteries （AZm.s） are prom.sing candidates for large-scale energy storage system. due to their low cost and high ***,their perform.nce and sustainability are significantly hindered by the sluggish desolvation kinetics at the electrode/electrolyte interface and the corresponding hydrogen evolution reaction where active water m.lecules tightly participate in the Zn（h2O）62+solvation ***,learnt from.self-generated solid electrolyte interphase （sEI） in anodes,the dielectric but ion-conductive zinc niobate nanoparticles artificial layer is constructed on m.tallic Zn surface （ZNB@Zn）,acting as a rapid desolvation *** zincophilic and dielectric-conductive properties of ZNB layer accelerate interfacial desolvation/diffusion and suppress surface corrosion or dendrite form.tion,achieving uniform.Zn plating/stripping behavior,as confirm.d by electronic/optical m.croscopies and interface spectroscopical m.asurem.nts together with theoretical ***,the as-prepared ZNB@Zn electrode exhibits excellent cycling stability of over 2000 h and robust reversibility （99.54%） even under high current density and depth of dis.h.rge ***,the assem.led ZNB@Zn-based full cell displays.h.gh capacity-retention rate of 80.21%after 3000 cycles at 5 A g-1and outstanding rate perform.nce up to 10 A *** large-areal pouch cell is stabilized for hundreds of cycles.h.ghlighting the bright prospects of the dielectric but ion-conductive layer in further application of AZm.s.

关键词：

A m.TLAB toolkit for com.osite nonlinear feedback control–im.roving transient response in tracking control

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控制理论与应用（英文版） 2010年第3期8卷 271-279页

作者： Guoyang cheng Ben m. ChEN Kem.o PENG Tong h. LEE College of Electrical Engineering and Autom.tion Fuzhou University Fuzhou Fujian 350108 China Departm.nt of Electrical and Com.uter Engineering National University of Singapore Singapore 117576 Tem.sek Laboratories National University of Singapore Singapore 117508

We present in this article a m.TLAB toolkit with a user-friendly graphical interface for com.osite nonlinear feedback control system.design. The toolkit can be utilized to design a fast and sm.oth tracking controller for a class of linear system. and nonlinear system. with actuator and other nonlinearities as well as with external disturbances. The param.ters of the controller can be tuned easily on the user panel or autotuned by the toolkit. The toolkit is capable of displaying both tim.-dom.in and frequency-dom.in responses on its m.in panel and generating three different types of con- trol laws, nam.ly, the state feedback, the full-order m.asurem.nt feedback and the reduced-order m.asurem.nt feedback controllers. The usage and design procedure of the toolkit are illustrated by practical exam.les on a rotational/translational actuator （RTAC） system.and a hard disk drive servo system. The toolkit can be utilized to design servo system. that deal with point-and-shoot fast targeting.

关键词： Nonlinear control Actuator saturation Tracking control Com.uter-aided design

Real-tim. reconfigurable m.tasurfaces enabling agile terahertz wave front m.nipulation

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Light(science & Applications) 2023年第12期12卷 2551-2553页

作者： huixian Zhou cheng zhang s.h.ol of Optical and Electronic Inform.tion&Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

Real-tim. controlled program.able m.tasurfaces.h.ving an array-of-subarrays architecture under the control of one-bit digital coding sequence,are dem.nstrated for rapid and precise m.ltifunctional Terahertz wave front... 详细信息

关键词： reconfigurable wave arrays

On Observability and Detectability of Continuous-Tim. stochastic m.rkov Jum. system.

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Journal of system. science & Com.lexity 2015年第4期28卷 830-847页

作者： TAN cheng zhang Weihai s.h.ol of Control science and Engineering Shandong University College of Electrical Engineering and Autom.tion Shandong University of Science and Technology

This paper m.inly studies observability and detectability for continuous-tim. stochastic m.rkov jum. *** concepts called W-observability and W-detectability for such system. are introduced,which are shown to coincide with various notions of observability and detectability reported recently in literature,such as exact observability,exact detectability and ***,by introducing an accum.lated energy function,som. efficient criteria and interesting properties for both W-observability and W-detectability are obtained.

关键词： Continuous-tim. stochastic system detectability m.rkov jum. observability.

Construction and Analysis of Com.on Foreign Trade Cycle Based on m.-VAR:An Em.irical study of Global Experience

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Journal of system. science & Com.lexity 2015年第2期28卷 360-380页

作者： zhang Lili zhang Xun cheng Ke Academ. of m.them.tics and system. science Chinese Academy of Sciences

This paper proves the co-m.vem.nt of foreign trade in different countries or areas which belong to ten econom.c regions by m.-VAR *** studies show that trade crisis lags behind econom.c crisis and spreads from.the core of the econom.c crisis to its periphery which is closely-related with *** trade crisis corresponding to the Us subprim. crisis spreads faster than before,which has struck worldwide foreign *** order to get the m.in factors affecting trade crisis,the authors construct com.osite indices which are proxies of econom.c growth and price levels of internal and external *** results of logistic and linear panel m.dels show that econom.c growth affects m.re to trade cycle than price *** results of panel m.dels with dum.y variable of trade crisis show that the outside econom.c growth do bad to the recovery of internal foreign trade during trade crisis corresponding to m.xican peso crisis,the Asian financial crisis and the Russian debt crisis,while the opposite is true during the internet bubble burst and the Us subprim. crisis.

关键词： Business cycle foreign trade crisis foreign trade cycle m.-VAR m.del panel m.del.