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Catalysts for the hydrogen evolution reaction in alkaline medium:Configuring a cooperative mechanism at the Ag-Ag_(2)S-moS_(2) interface

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Journal of Energy Chemistry 2022年第11期31卷 481-488,I0013页

作者： Avraham bar-Hen Simon Hettler Ashwin Ramasubramaniam Raul Arenal Ronen bar-Ziv m.ya bar sadan Department of Chemistry Ben-Gurion University of the NegevBeer-Sheva 8410501Israel Department of Chemistry Nuclear Research Center NegevP.O.Box 9001Beer-Sheva 84190Israel Laboratorio de microscopías Avanzadas Universidad de Zaragoza50018 ZaragozaSpain Instituto de Nanociencia y materiales de Aragon CSIC-U.de ZaragozaCalle Pedro Cerbuna 1250009 ZaragozaSpain Department of mechanical and Industrial Engineering University of MassachusettsAmherstMA 01003United States ARAID Foundation 50018 ZaragozaSpain

Designing electrocatalysts for HER in alkaline conditions to overcome the sluggish kinetics associated with the additional water dissociation step is a recognized challenge in promoting the hydrogen *** this end,delicately tuning the atomic-scale structure and surface composition of nanoparticles is a common strategy and,specifically,making use of hybrid structures,can produce synergistic effects that lead to highly active ***,we present a core-shell catalyst of Ag@moS_(2)that shows promising results towards the hydrogen evolution reaction(HER)in both 0.5 m H_(2)SO_(4)and 0.5 m *** this hybrid structure,the moS_(2)shell is strained and defective,and charge transfer occurs between the conductive core and the shell,contributing to the electrocatalytic *** shelling process results in a large fraction of Ag_(2)S in the cores,and adjusting the relative fractions of Ag,Ag_(2)S,and moS_(2)leads to improved catalytic activity and fast charge-transfer *** suggest that the enhancement of alkaline HER is associated with a cooperative effect of the interfaces,where the Ag(Ⅰ)sites in Ag_(2)S drive the water dissociation step,and the formed hydrogen subsequently recombines on the defective moS_(2)*** study demonstrates the benefits of hybrid structures as functional nanomaterials and provides a scheme to activate moS_(2)for HER in alkaline conditions.

关键词： Water splitting Core-shell Catalytic mechanism Electrocatalysis 2D materials

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Oxygen Nanoshuttles for Tumor Oxygenation and Enhanced Cancer Treatment

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CCS Chemistry 2019年第3期1卷 239-250页

作者： Liangzhu Feng Oshra Betzer Danlei Tao Tamar sadan Rachela Popovtzer Zhuang Liu Jiangsu Key Laboratory for Carbon-Based Functional materials and Devices Institute of Functional Nano and Soft Materials(FUNSOM)College of Nano Science&Technology(CNST)Soochow UniversitySuzhouJiangsu 215123China Faculty of Engineering Institute of Nanotechnology and Advanced MaterialsBar-Ilan UniversityRamat Gan 52900Israel

Tumor hypoxia is one of the hostile tumor micro-environment characteristics occurring in solid *** feature is closely related to tumor progression and can negatively impair the effec-tiveness of cancer ***,various strategies have been developed that enable effi-cient tumor oxygenation,not only enhancing tre-atment outcome of oxygen-consuming cancer therapeutics such as radiotherapy and photody-namic therapy,but also reversing the immunosup-pressive tumor microenvironment to promote cancer *** review focuses on the latest progress in design and fabrication of inno-vative tumor-targeted oxygen nanoshuttles that attenuate tumor hypoxia and enhance cancer *** perspectives for clinical translation of tumor-targeted oxygen nanoshuttles will be fur-ther discussed.

关键词： oxygen nanoshuttles tumor hypoxia tumor oxygenation tumor microenvironment enhanced cancer treatment

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Research of Power Take-off System for “Sharp Eagle Ⅱ” Wave Energy Converter

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China Ocean Engineering 2019年第5期33卷 618-627页

作者： YE Yin WANG Kun-lin YOU ya-ge SHENG Song-wei Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 China Key Laboratory of Renewable Energy Chinese Academy of Sciences Guangzhou 510640 China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640 China

The " Sharp Eagle” device is a wave energy converter of a hinged double floating body. The wave-absorbing floating body hinges on the semi-submerged floating body structure. Under the action of wave, the wave-absorbing floating body rotates around the hinge point, and the wave energy can be converted into kinetic energy. In this paper, the power take-off system of " Sharp Eagle Ⅱ” wave energy converter (the second generation of " Sharp Eagle”) was studied, which adopts the hydraulic type power take-off system. The 0-1 power generation mode was applied in this system to make the " Sharp Eagle Ⅱ” operate under various wave conditions. The principle of power generation was introduced in detail, and the power take-off system was simulated. Three groups of different movement period inputs were used to simulate three kinds of wave conditions, and the simulation results were obtained under three different working conditions. In addition, the prototype of " Sharp Eagle Ⅱ” wave energy converter was tested on land and in real sea conditions. The experimental data have been collected, and the experimental data and simulation results were compared and validated. This work has laid a foundation for the design and application of the following " Sharp Eagle” series of devices.

关键词： Sharp Eagle Wave Energy Converter power take-off power generation mode hydraulic system

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Chiral universality class of normal-superconducting and exciton condensation transitions on surface of topological insulator

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Frontiers of physics 2015年第3期10卷 65-82页

作者： Dingping Li baruch Rosenstein B. ya. Shapiro I. Shapiro School of Physics Peking University Beijing 100871 China Collaborative Innovation Center of Quantum matter Beijing 100084 China Electrophysics Department National Chiao Tung University Hsinchu 30050 Taiwan China physics Department Ariel University Ariel 40700 Israel Physics Department Bar-Ilan University 52900 Ramat-Gan Israel

New two-dimensional systems such as the surfaces of topological insulators （TIs） and graphene offer the possibility of experimentally investigating situations considered exotic just a decade ago. These situations include the quantum phase transition of the chiral type in electronic systems with a relativistic spectrum. Phonon-mediated （conventional） pairing in the Dirac semimetal appearing on the surface of a TI causes a transition into a chiral superconducting state, and exciton condensation in these gapless systems has long been envisioned in the physics of narrow-band semiconductors. Starting from the microscopic Dirac Hamiltonian with local attraction or repulsion, the bardeen- Cooper-Schrieffer type of Gaussian approximation is developed in the framework of functional integrals. It is shown that owing to an ultrarelativistic dispersion relation, there is a quantum critical point governing the zero-temperature transition to a superconducting state or the exciton condensed state. Quantum transitions having critical exponents differ greatly from conventional ones and belong to the chiral universality class. We discuss the application of these results to recent experiments in which surface superconductivity was found in TIs and estimate the feasibility of phonon pairing.

关键词： topological insulator Weyl semimetal superconductivity quantum criticality

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Protein-protein Interaction Between Domains of PDZ and bar from PICK1

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Chemical Research in Chinese Universities 2007年第2期23卷 191-195页

作者： XIAO Hong SHI ya-wei WANG Li-li YUAN Jing-ming Institute of Biotechnology Key Laboratory of Chemical Biology and Molecular Engineering of National Ministry of Education Shanxi University Taiyuan 030006 P. R. China

Two DNA fragments encoding PDZ domain （21-110 residues） and bar domain （ 150-360 residues） from PICK1 （1-416 residues） were amplified by PCR and then introduced into vectors, pET-32m and pmAL-e2X respectively to generate recombinant plasmids, pE-pdz and pm-bar. Having been separately transferred into the hosts E. coli BL21 and E. coli Jm109, these two strains can express fusion proteins： His-tagged PDZ（PDZ domain） and maltose binding protein-bar（ mBP-bar domain） respectively, as confirmed by both SDS-PAGE and Wostem blotting. The interaction between these two domains is dose-dependence, as identified by a pull-down test. moreover, it has been shown from the ELISA analysis that the actual amount of PDZ bound to mBP-bar-amylose beads reaches （ 16 ± 0. 5）%, as calculated by the molar ratio of PDZ to mBP-bar. In addition, the interaction between bar（bait） and PDZ（prey） in vivo was also examined with a yeast two-hybrid system.

关键词： bar domain PDZ domain PICK1 Protein-protein interaction Pull-down test Yeast two-hybrid

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High-α-metal-Rich stars in the LAmOST-mRS survey and its connection with the galactic bulge

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Research in Astronomy and Astrophysics 2021年第6期21卷 424-432页

作者： Hao-Peng Zhang Yu-Qin Chen Gang Zhao Jing-Kun Zhao Xi-Long Liang Hai-Ning Li ya-Qian Wu Ali Luo Rui Wang CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China

We report the detection of a large sample of high-α-metal-rich stars on the low giant branch with 2.60.2 than the comparison *** properties strongly indicate its connection with the outer bar/bulge region at R=3-5 kp... 详细信息

We report the detection of a large sample of high-α-metal-rich stars on the low giant branch with 2.6mOST-mRS *** special group corresponds to an intermediate-age population of 5-9 Gyr based on the[Fe/H]-[C/N]diagram and age-[C/N]calibration.A comparison group is selected to have a solarαratio at super metallicity,which is young and has a narrow age range around 3 *** groups have thin-disk like kinematics but the former shows slightly large velocity *** special group shows a larger extension in a vertical distance toward 1.2 kpc,a second peak at smaller Galactic radius and a larger fraction of super metal rich stars with[Fe/H]>0.2 than the comparison *** properties strongly indicate its connection with the outer bar/bulge region at R=3-5 kpc.A tentative interpretation of this special group is that its stars were formed in the X-shaped bar/bulge region,close to its corotation radius,where radial migration is the most intense,and brings them to present locations at 9 kpc and *** eccentricities and slightly outward radial excursions of its stars are consistent with this *** kinematics(cold)and chemistry([α/Fe]~0.1)further support the formation of the instability-driven X-shaped bar/bulge from the thin disk.

关键词： stars:late type stars:abundances stars:fundamental parameters Galaxy:disk Galaxy:evolution Galaxy:structure

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Effect of strain rate on microstructural evolution and thermal stability of 1050 commercial pure aluminum

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Transactions of Nonferrous metals Society of China 2018年第1期28卷 1-8页

作者： yang yaNG Jun-liang WANG ya-dong CHEN Hai-bo HU School of materials Science and Engineering Central South University Changsha 410083 China Institute of Fluid Physics China Academy of Engineering Physics Mianyang 621900 China Key Laboratory of ministry of Education for Nonferrous metal materials Science and Engineering Central South University Changsha 410083 China

Effects of strain rate on the microstructure evolution and thermal stability of1050commercial pure aluminum processed by means of split Hopkinson pressure bar(SHPB)and Instron?3369mechanical testing machine were *** in the deformed state and after various annealing treatments at423?523K(150?250°C)for1h were characterized by TEm and hardness *** result reveals that the samples in the deformed state were mainly composed of elongated subgrains/cells with high density of *** of the quasi-static compressed aluminum were quite stable throughout the temperature range studied,and no significant grain growth was ***,for the dynamic impacted one,recrystallized grains with an average grain size of4.7μm were evolved after annealing at523K(250°C)*** is suggested that the annealing behavior of this dynamic deformed aluminum is a continuous process of grain coarsening,rather than the traditional discontinuous recrystallization for the quasi-static compressed aluminum.

关键词： strain rate thermal stability continuous recrystallization 1050 commercial pure aluminum

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雪莲果热泵干燥特性及品质研究(英文)

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食品科学 2014年第3期35卷 16-22页

作者：石启龙郑亚琴赵亚山东理工大学农业工程与食品科学学院山东淄博255049

研究雪莲果样品厚度、装料量、干燥温度、风速和旁通比对雪莲果热泵干燥特性及质量变化的影响。结果表明：雪莲果干燥速率随着样品厚度和装料量的增加而降低,随着干燥温度和风速的升高而增加。雪莲果热泵干燥过程绝大部分以降速干燥为... 详细信息

研究雪莲果样品厚度、装料量、干燥温度、风速和旁通比对雪莲果热泵干燥特性及质量变化的影响。结果表明：雪莲果干燥速率随着样品厚度和装料量的增加而降低,随着干燥温度和风速的升高而增加。雪莲果热泵干燥过程绝大部分以降速干燥为主伴随相对较短时间的恒速干燥,而有些干燥速率曲线只存在降速干燥阶段。综合考虑单位能耗除湿率、色泽差异、收缩率、复水比,雪莲果热泵干燥最适参数范围：样品厚度2~4 mm、装料量1~2 kg/m2、干燥温度25~35℃、风速1.5~2.0 m/s。而旁通比对雪莲果热泵干燥进程影响不显著。

关键词：热泵干燥雪莲果干燥特性质量

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Antiferromagnetic spin dynamics in exchanged-coupled Fe/GdFeO_(3) heterostructure

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Chinese Physics B 2021年第11期30卷 565-569页

作者： Na Li Jin Tang Lei Su ya-Jiao Ke Wei Zhang Zong-Kai Xie Rui Sun Xiang-Qun Zhang Wei He Zhao-Hua Cheng State Key Laboratory of magnetism and Beijing National Laboratory for Condensed matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake materials Laboratory Dongguan 523808China

We investigate the ultrafast spin dynamics of an antiferromagnet in a ferromagnet/antiferromagnet heterostructure Fe/GdFeO_(3) via an all-optical *** laser irradiation,the terahertz spin precession is hard to be excited in a bare GdFeO_(3) without spin reorientation phase but efficiently in Fe/GdFeO_(3).Both quasi-ferromagnetic and impurity modes,as well as a phonon mode,are *** attribute it to the optical modification of interfacial exchange coupling between Fe and ***,the excitation efficiency of dynamics can be modified significantly via the pump laser *** results elucidate that the interfacial exchange coupling is a feasible stimulation to efficiently excite terahertz spin dynamics in *** will expand the exploration of terahertz spin dynamics for antiferromagnet-based opto-spintronic devices.

关键词： ultrafast magnetization dynamics antiferromagnetics magnetic oxides magnetization dynamics

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顶空固相微萃取/气相色谱-质谱联用测定水中6种挥发性硅氧烷

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分析测试学报 2012年第9期31卷 1115-1119页

作者：徐琳史亚利蔡亚岐中国科学院生态环境研究中心环境化学与生态毒理学国家重点实验室北京100085

建立了水中4种环形和2种线形硅氧烷的顶空固相微萃取/气相色谱-质谱联用分析方法。考察了萃取纤维、萃取温度、萃取时间、水样pH值、解析时间、盐效应等因素对实验结果的影响。优化后的条件为:40 mL水、40μL内标(m4Q,500μg/L)、NaCl(0... 详细信息

建立了水中4种环形和2种线形硅氧烷的顶空固相微萃取/气相色谱-质谱联用分析方法。考察了萃取纤维、萃取温度、萃取时间、水样pH值、解析时间、盐效应等因素对实验结果的影响。优化后的条件为:40 mL水、40μL内标(m4Q,500μg/L)、NaCl(0.1 g/mL)加入60 mL顶空瓶中,选用65μm聚二甲基硅氧烷-二乙烯基苯(PDmS/DVB)纤维于24℃顶空萃取45 min。萃取完成后将纤维插入气相色谱进样口,于200℃解吸2 min进行定性、定量分析。结果表明,6种目标物的方法检出限为(LOD)2.6～7.8 ng/L,回收率为82%～96%,相对标准偏差(RSD)为1.1%～7.9%。

关键词：水挥发性硅氧烷顶空固相微萃取 GC-mS

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