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Chemical vapor deposition of monolayer WS2 nano- sheets on Au foils toward direct application in hydrogen evolution

Nano Research 2015年第9期8卷 2881-2890页

作者： Yanshuo Zhang jianping Shi Gaofeng Han Minjie Li Qingqing ji Donglin Ma Yu Zhang Cong Li Xingyou lang Yanfeng Zhang Zhongfan Liu Department of Materials Science and Engineering College of Engineering Peking University Beijing 100871 China Center for Nanochemistry (CNC) Belling science and Engineering center for Nanocarbons Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 China Key Laboratory of Automobile Materials (jilin University) Ministry of Education and School of Materials Science and Engineering Jilin University Changchun 130022 China

Monolayer tungsten disulfide （WS2）, a typical member of the semiconducting transition metal dichalcogenide family has drawn considerable interest because of its unique properties. Intriguingly the edge of WS2 exhibits an ideal hydrogen binding energy which makes WS2 a potential alternative to Pt-based electrocatalysts for the hydrogen evolution reaction （HER）. Here, we demonstrate for the first time the successful synthesis of uniform monolayer WS2 nanosheets on centimeter- scale Au foils using a facile, low-pressure chemical vapor deposition method. The edge lengths of the universally observed triangular WS2 nanosheets are tunable from -100 to N1,000 nm. The WS2 nanosheets on Au foils featuring abundant edges were then discovered to be efficient catalysts for the HER, exhibiting a rather high exchange current density of -30.20 μA/cm2 and a small onset potential of Nl10 mV. The effects of coverage and domain size （which correlate closely with the active edge density of WS2） on the electrocatalytic activity were investigated. This work not only provides a novel route toward the batch-production of monolayer WS2 via the introduction of metal foil substrates but also opens up its direct application for facile HER.

关键词： tungsten disulfide,chemical vapor deposition,monolayer,Au foil,hydrogen evolution reaction

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DESIGN OF RECONFIGURABLE MANUFACTURING SYSTEMS WITH STRONGLY COUPLED NATURE

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Chinese Journal of Mechanical Engineering 2007年第1期20卷 91-95页

作者： lang Sherman Y T Integrated Manufacturing Technologies Institute National Research Council Canada N6G 4X8 ON Canada

Today＇s manufacturing cnvironmem forces manufacturing companies to make as many product variations as possible at affordable costs within a short time. Mass customisation is one of most important technologies for companies to achieve their objectives. Efforts to mass customisation should be made on two aspects：（1） To modularize products and make them as less differences as possible; （2） To design manufacturing resources and make them provide as many processes variations as possible. This paper reports our recent work on aspect （2）, i.e. how to design a reconfignrable manufacturing system （RMS） so that it can be competent to accomplish various processes optimally; Reconfignrable robot system （RRS） is taken as an example. RMS design involves architecture design and configuration design, and configuration design is further divided in design analysis and design synthesis. Axiomatic design theory （ADT） is applied to architecture design, the features and issues of RRS configuration design are discussed, automatic modelling method is developed for design analysis, and concurrent design methodology is presented for design synthesis.

关键词： Mass customisation Reconfignrable manufacturing systems Reconfignrable robotic system Analysis Synthesis Architecture Adaptability Reconfignrability Configuration design

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Performance of Nb_(0.8)Zr_(0.2) Layer-Modified AISI430 Stainless Steel as Bipolar Plates for Direct Formic Acid Fuel Cells

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Acta Metallurgica Sinica(English Letters) 2021年第1期34卷 77-84页

作者： Yuanyuan Liu Zhongmin lang jinlong Cui Shengli An Inner Mongolia Key Laboratory of Coal Chemical Engineering and Comprehensive Utilization School of Chemistry and Chemical EngineeringInner Mongolia University of Science and TechnologyBaotou 014010China School of Materials and Metallurgy Inner Mongolia University of Science and TechnologyBaotou 014010China

To improve the interfacial conductivity and corrosion resistance of AISI430 stainless steel(430 SS)as bipolar plates for direct formic acid fuel cells(DFAFCs),a Nb_(0.8)Zr_(0.2) layer has been successfully synthesized via the pulsed laser deposition(PLD)technique on the surface of 430 *** Nb_(0.8)Zr_(0.2) layer is smooth,uniform,and comparatively compact without any surface flaw and *** under the simulated anodic environment of DFAFCs(0.05 M H_(2)SO_(4)+2 ppm HF+10 M HCOOH at 70℃)shows that the corrosion resistance of 430 SS is obviously ameliorated after the PLD *** addition,the interfacial contact resistance of Nb_(0.8)Zr_(0.2)-430 SS(6.0 mΩcm^(2))is much smaller than that of bare 430 SS(151.3 mΩcm^(2))at the clamping force of 140 N cm^(-2).Besides,diff erent from the highly increased interfacial contact resistance of bare 430 SS,the Nb_(0.8)Zr_(0.2)-430 SS shows a minor increase resistance after potentiostatic tests in simulated anodic environment of DFAFCs.

关键词： Corrosion resistance Nb_(0.8)Zr_(0.2) layer Direct formic acid fuel cell Interfacial contact resistance Bipolar plates

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Say “NO” to ABA signaling in guard cells by S-nitrosylation of OST1

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Science China(Life Sciences) 2015年第3期58卷 313-314页

作者： lang ZhaoBo ZUO jianRu Shanghai Center for Plant Stress Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences State Key Laboratory of Plant Genomics and National Plant Gene Research Center Institute of Genetics and Developmental BiologyChinese Academy of Sciences

Nitric oxide（NO）,a gaseous compound,plays important roles in plant immunity,abiotic stress response and plant development[1].In plants,NO is synthesized through either oxidative or reductive route that is dependent on the nitrate reductases（NADH）1（NIA1）and *** bioactivity is realized through redox-based post-translational protein

关键词： translational abiotic immunity guard nitrate NO Say bioactivity reductive signaling

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OST1 phosphorylates ICE1 to enhance plant cold tolerance

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Science China(Life Sciences) 2015年第3期58卷 317-318页

作者： lang ZhaoBo ZHU jianKang Shanghai Center for Plant Stress Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Department of Horticulture and Landscape Architecture Purdue University

Low temperature is one of the most important environmental stresses that affect plant survival,growth and *** response to cold stress,hundreds of genes are upor down-regulated in plants[1].The C-repeat binding factor（CBF）regulon is the best-understood cold-responsive transcriptional module[1].In Arabidopsis,there are three CBF genes,i.e.,CBF1,CBF2 and *** are rapidly.

关键词： Arabidopsis hundreds responsive understood mutant freezing promoter upstream downstream stabilize

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Progress in efficient doping of Al-rich AlGaN

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Journal of Semiconductors 2024年第2期45卷 10-20页

作者： jiaming Wang Fujun Xu Lisheng Zhang jing lang Xuzhou Fang Ziyao Zhang Xueqi Guo Chen ji Chengzhi ji Fuyun Tan Xuelin Yang Xiangning Kang Zhixin Qin Ning Tang Xinqiang Wang Weikun Ge Bo Shen State Key Laboratory of Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Beijing SinoGaN Semiconductor Technology Co. Ltd.Beijing 101399China Nano-optoelectronics Frontier Center of Ministry of Education Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China

The development of semiconductors is always accompanied by the progress in controllable doping *** AlGaN-based ultraviolet(UV)emitters as an example,despite a peak wall-plug efficiency of 15.3%at the wavelength of 275 nm,there is still a huge gap in comparison with GaN-based visible light-emitting diodes(LEDs),mainly attributed to the inefficient doping of AlGaN with increase of the Al ***,p-doping of Al-rich AlGaN is a long-standing challenge and the low hole concentration seriously restricts the carrier injection *** p-GaN cladding layers are widely adopted as a compromise,the high injection barrier of holes as well as the inevitable loss of light extraction cannot be *** in terms of n-doping the main issue is the degradation of the electrical property when the Al composition exceeds 80%,resulting in a low electrical efficiency in sub-250 nm *** review summarizes the recent advances and outlines the major challenges in the efficient doping of Al-rich AlGaN,meanwhile the corresponding approaches pursued to overcome the doping issues are discussed in detail.

关键词： AlGaN-based UV-LEDs Al-rich AlGaN doping

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Nuclear current and antimagnetic rotation in ^(105)Cd

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Science China(Physics,Mechanics & Astronomy) 2012年第12期55卷 2420-2424页

作者： LIU lang ZHAO PengWei State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China

The effects of the nuclear current in the antimagnetic rotation band of 105Cd have been investigated in a fully self-consistent and microscopic way by using the tilted axis cranking relativistic mean-field *** was found that the inclusion of nuclear current leads to a higher angular momentum and thus a larger kinetic moment of inertia at a given rotational *** a consequence,the B(E2) values with current are always smaller than those without current.

关键词： covariant density functional theory tilted axis cranking model nuclear current antimagnetic rotation

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织物增强混凝土薄板的高温力学性能与微观界面黏结破坏性分析(英文)

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2014年第1期15卷 31-38页

作者： Shi-lang XU Ling-hua SHEN ji-yang WANG Ye FU College of Civil Engineering and Architecture Zhejiang University

研究目的：探讨不同温度和持续时间对织物增强混凝土（TRC）薄板裂缝行为和承载能力的影响。通过微观扫描电镜观测观测，分析纤维编织网与基体混凝土间的界面黏结破坏机理。创新要点：明确了高温后纤维编纵网与基体混凝土之间界向粘结... 详细信息

研究目的：探讨不同温度和持续时间对织物增强混凝土（TRC）薄板裂缝行为和承载能力的影响。通过微观扫描电镜观测观测，分析纤维编织网与基体混凝土间的界面黏结破坏机理。创新要点：明确了高温后纤维编纵网与基体混凝土之间界向粘结破坏的主要原因。以温度和持时为基本参数，对TRC构件的耐高温性能进行正确评价。研究方法：通过三点弯曲试验（地图3），对高温后试什的力学件能（见图4、5）进行测试。通过微观扫揣电镜观测（见图8～10），了解高温下纤维编织网、坏氧树脂及基体混凝土的形态。重要结论：1．环氧树脂任200℃高温作用90min时劣化严重，造成纤维网与基体之间的界血黏结破坏，这是导致试件破坏的主要原因；2．在常温或120℃作用下，掺加聚丙烯（PP）纤维可以较大幅度地提高TRC构件的乐载能力；但在200℃、持续时间较长的高温作用下，PP纤维的掺入对试件的乐载力几乎没有影响。

关键词：织物增强混凝土薄板环氧树脂聚丙烯纤维耐高温性能三点弯曲试验

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Simplified Modeling and Mathematical Analysis in Cardiac Electric Field Propagation for Human and Animals

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Journal of Beijing Institute of Technology 2020年第2期29卷 167-176页

作者： Ping lang Lei Han School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China

The different characteristics of cardiac electric field(CEF)radiation in humans and other animals are presented in this *** modeling and mathematical analysis are developed to comprehensively unveil the properties of CEF,based on typical heartbeat *** numerical simulation results demonstrate that the frequency bandwidths and the cycle durations of CEF are different for healthy humans versus humans on the verge of death and for humans versus other *** results indicate that the present study may extensively contribute towards recognizing human beings or other animal targets quickly and accurately with CEF in dangerous situations or in other applications.

关键词： mathematical analysis distinguishing standards cardiac electric field targets identification

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Highlights of the major progress in single-atom catalysis in 2015 and 2016

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Chinese Journal of Catalysis 2017年第9期38卷 1498-1507页

作者： Bing Han rui lang Botao Qiao Aiqin Wang Tao Zhang State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China University of Chinese Academy of Sciences Beijing 100049 China

The idea that single metal atoms dispersed on a solid support can act as an efficient heterogeneous catalyst was raised in2011when single Pt atoms on an FeOx surface were reported to be active for CO oxidation and preferential oxidation of CO in *** last six years have witnessed tremendous progress in the field of single‐atom *** we introduce the major achievements on this topic *** particular aspects of single‐atom catalysis are discussed in depth,including new approaches in single‐atom catalyst(SAC)synthesis,stable gold SACs for various reactions,the high selectivity of Pt and Pd SACs in hydrogenation,and the superior performance of non‐noble metal SACs in *** accomplishments will encourage more efforts by researchers to achieve the controllable fabrication of SACs and explore their potential applications.

关键词： Single‐atom catalysis Catalyst synthesis CO oxidation Hydrogenation Electrocatalysis

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