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MOF-derived Cu embedded into N-doped mesoporous carbon as a robust support of PdAu nanocatalysts for ethanol electrooxidation

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Rare Metals 2024年第3期43卷 1083-1094页

作者： Yu-Fu Huang Peng Wu Jun-Ping Tang Jian Yang Jing Li Shuai Chen Xue-Ling Zhao ChengChen Bin-Wei Zhang Yan-Yun Ma Wei-Heng Shi Dong-Hai Lin Shi-Gang Sun School of Energy and materials Shanghai Engineering Research Center of Advanced Thermal Functional MaterialsShanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai201209China State key laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing401331China Center of Advanced Energy Technology and Electrochemistry Institute of Advanced Interdisciplinary StudiesChongqing UniversityChongqing400044China Institute of Functional Nano&Soft materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China Department of materials Science and Engineering Drexel UniversityPhiladelphiaPA19104USA

Metal-organic frameworks(MOFs)h ave attracted widespread attention due to their large surface area and porous *** designing the nanostructures of MOFs to promote their application in ethanol electrooxidation is still a ***,a novel Cu-NCNs(Cu-nitrogen-doped carbon nanotubes)support was synthesized by pyrolysis of melamine(MEL)and Cu-ZIF-8 together,and then,Pd-Au nanoalloys were loaded by sodium borohydride reduction method to prepare PdAu@Cu-NCNs *** generating mesoporous carbon with high specific surface area and favorable electron and mass transport can be used as a potential excellent carrier for PdAu *** addition,the balance of catalyst composition and surface structure was tuned by controlling the content of Pd and ***,the best-performed Pd_(2)Au_(2)@Cu-NCN-1000-2(where 1000 means the carrier calcination temperature,and 2 means the calcination constant temperature time)catalyst exhibits better long-term stability and electrochemical activity for ethanol oxidation in alkaline media(4.80 A·mg^(-1)),which is 5.05 times higher than that of commercial Pd/C(0.95 A·mg^(-1)).Therefore,this work is beneficial to further promoting the application of MOFs in direct ethanol fuel cells(DEFCs)and can be used as inspiration for the design of more efficient catalyst support structures.

关键词： Metal-organic frameworks(MOFs) N-doped Mesoporous carbon PdAu Ethanol electrooxidation

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Discontinuous phase diagram of amorphous carbons

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National Science Review 2024年第4期11卷 164-171页

作者： YinBo Zhu ZhouYu Fang ZhongTing Zhang HengAn Wu CAS key laboratory of Mechanical Behavior and Design of materials Department of Modern MechanicsUniversity of Science and Technology of China State key laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences

The short-range order and medium-range order of amorphous carbons demonstrated in experiments allow us to rethink whether there exist intrinsic properties hidden by atomic disordering. Here we presented six representative phases of amorphous carbons（0.1–3.4 g/cm3）, namely, disordered graphene network（DGN）, high-density amorphous carbon（HDAC）, amorphous diaphite（a-DG）, amorphous diamond（a-D）, paracrystalline diamond（p-D）, and nano-polycrystalline diamond（NPD）, respectively, classified by their topological features and microstructural characterizations that are comparable with experiments. To achieve a comprehensive physical landscape for amorphous carbons, a phase diagram was plotted in the sp3/sp2versus density plane, in which the counterintuitive discontinuity originates from the inherent difference in topological microstructures, further guiding us to discover a variety of phase transitions among different amorphous carbons. Intriguingly, the power law, log（sp3/sp2） ∝ ρn, hints at intrinsic topology and hidden order in amorphous carbons, providing an insightful perspective to reacquaint atomic disorder in non-crystalline carbons.

关键词： amorphous carbons disordered carbons phase diagram microstructural topology phase transition

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Electrochemical deposition of Li_(2)S_(2)/Li_(2)S in aprotic Li–S batteries

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Particuology 2024年第7期90卷 516-521页

作者： Zhifeng Yao Xiaozhong Fan Long Kong School of Civil Engineering Xi'an University of Architecture&TechnologyXi'an 710055China Institute of Flexible Electronics(IFE) Northwestern Polytechnical UniversityXi'an 710129China

Lithium–sulfur(Li–S)batteries stand out the energy storage systems because of extremely high energy density(2600 W h Kg−1)and low-cost sulfur ***,the sluggish deposition from liquid Li polysulfides(LiPSs)to solid Li2S leads to mild power density and short cycle *** and regulating Li_(2)S_(2)/Li2S deposition are conceived to be importance to deliver second-plateau capacity in acceptable kinetics,which has the potential to operation Li–S batteries under electrolyte-lean *** perspective aims to summarize the proposed models that can describe the nucleation and propagation of three-dimensional Li_(2)S_(2)/Li2S,as well as affords critical views how electrolyte dictates LiPS conversion from liquid to *** hopes to encourage necessary scaffold strategies and electrolyte formulations to further improve energy density and life span of Li–S batteries.

关键词： Lithium–sulfur batteries Electrolyte Li_(2)S precipitation Characterization

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Critical behavior of quasi-two-dimensional ferromagnet Cr1.04Te2

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Chinese Physics B 2024年第7期33卷 97-105页

作者：钮伟宋沁心常世琦王敏袁奎高嘉程王硕王振东刘凯斐刘萍徐永兵张晓倩普勇 Jiangsu Provincial Engineering research Center of Low Dimensional Physics and New Energy & School of Science Nanjing University of Posts and Telecommunications School of Electronic Science and Engineering Nanjing University key laboratory of Quantum materials and devices of Ministry of Education School of Physics Southeast University

The self-intercalation of Cr into pristine two-dimensional（2D） van der Waals ferromagnetic CrTe2,which forms chromium tellurides（CrxTe2）,has garnered interest due to their remarkable magnetic characteristics and the wide variety of chemical compositions ***,comprehensive basic characterization and magnetic studies are conducted on quasi-2D ferromagnetic *** of the isothermal magnetization curves are conducted around the critical temperature to systematically investigate the critical ***,the critical exponents β=0.2399,γ=0.859,and δ=4.3498,as well as the Curie temperature TC=249.56 K,are determined using various methods,including the modified Arrott plots,the Kouvel-Fisher method,the Widom scaling method,and the critical isotherm *** results indicate that the tricritical mean-field model accurately represents the critical behavior of Cr1.04Te2.A magnetic phase diagram with tricritical phenomenon is thus *** investigations confirm that the critical exponents obtained conform to the scalar equation near TC,indicating their self-consistency and *** work sheds light on the magnetic properties of quasi-2D Cr1.04Te2,broadening the scope of the van der Waals crystals for developments of future spintronic devices operable at room temperature.

关键词： critical behavior magnetic measurement self-intercalation van der Waals magnets

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Angular and planar transport properties of antiferromagnetic V5S8

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Chinese Physics B 2024年第2期33卷 83-88页

作者：吴晓凯王彬吴德桐陈博文弭孟娟王以林沈冰 Center for Neutron Science and Technology and School of Physics Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devicesand Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-Sen University School of Integrated Circuits Shandong Technology Center of Nanodevices and Integration State Key Laboratory of Crystal MaterialsShandong University

Systemically angular and planar transport investigations are performed in layered antiferromagnetic(AF) V5S8. In this AF system, obvious anomalous Hall effect(AHE) is observed with a large Hall angle of 0.1 compared to that in ferromagnetic(FM) system. It can persist to the temperatures above AF transition and exhibit strong angular field *** phase diagram reveals various magnetic states by rotating the applied field. By analyzing the anisotropic transport behavior, magnon contributions are revealed and exhibit obvious angular dependence with a spin-flop vanishing line. The observed prominent planar Hall effect and anisotropic magnetoresisitivity exhibit two-fold systematical angular dependent oscillations. These behaviors are attributed to the scattering from spin–orbital coupling instead of nontrivial topological origin. Our results reveal anisotropic interactions of magnetism and electron in V5S8, suggesting potential opportunities for the AF spintronic sensor and devices.

关键词： antiferromagnetism planar Hall effect magnetic and topological properties

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Multichannel microneedle dry electrode patches for minimally invasive transdermal recording of electrophysiological signals

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Microsystems & Nanoengineering 2024年第3期10卷 119-136页

作者： Zhengjie Liu Xingyuan Xu Shuang Huang Xinshuo Huang Zhibo Liu Chuanjie Yao Mengyi He Jiayi Chen Hui-jiuan Chen Jing Liu Xi Xie State key laboratory of Optoelectronic materials and Technologies School of Electronics and Information TechnologyGuangdong Province Key Laboratory of Display Material and TechnologySun Yat-Sen UniversityGuangzhouChina School of Biomedical Engineering Sun Yat-Sen UniversityGuangzhouChina The First Affiliated Hospital of Sun Yat-Sen University GuangzhouChina

The collection of multiple-channel electrophysiological signals enables a comprehensive understanding of the spatial distribution and temporal features of electrophysiological *** approach can help to distinguish the traits and patterns of different ailments to enhance diagnostic *** array electrodes,which can penetrate skin without pain,can lessen the impedance between the electrodes and skin;however,current microneedle methods are limited to single channels and cannot achieve multichannel collection in small ***,a multichannel(32 channels)microneedle dry electrode patch device was developed via a dimensionality reduction fabrication and integration approach and supported by a self-developed circuit system to record weak electrophysiological signals,including electroencephalography(EEG),electrocardiogram(ECG),and electromyography(EMG)*** microneedles reduced the electrode–skin contact impedance by penetrating the nonconducting stratum corneum in a painless *** multichannel microneedle array(MMA)enabled painless transdermal recording of multichannel electrophysiological signals from the subcutaneous space,with high temporal and spatial resolution,reaching the level of a single microneedle in terms of signal *** MMA demonstrated the detection of the spatial distribution of ECG,EMG and EEG signals in live rabbit models,and the microneedle electrode(MNE)achieved better signal quality in the transcutaneous detection of EEG signals than did the conventional flat dry electrode *** work offers a promising opportunity to develop advanced tools for neural interface technology and electrophysiological recording.

关键词： needle rabbit electrode

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提高分子结晶度和分子间相互作用以实现有机太阳能电池效率和稳定性的同步提升（英文）

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Science China materials 2024年

作者：赵江通杨欣荣邵一鸣孙瑞闵杰 The Institute for Advanced Studies Wuhan University Institute of Polymer Optoelectronic materials and devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology key laboratory of Advanced Electrode materials for Novel Solar Cells for Petroleum and Chemical Industry of China School of Chemistry and Life SciencesSuzhou University of Science and Technology

通过分子设计精准控制体异质结(BHJ)形貌是开发高性能有机太阳能电池(OSCs)面临的长期挑战之一.本工作中,我们设计并合成了三种具有不同侧链(分别在苯并三唑单元上引入甲基、2-乙基己基和2-癸基十四烷基)的小分子受体(SMAs),即R-M、R-EH...

通过分子设计精准控制体异质结(BHJ)形貌是开发高性能有机太阳能电池(OSCs)面临的长期挑战之一.本工作中,我们设计并合成了三种具有不同侧链(分别在苯并三唑单元上引入甲基、2-乙基己基和2-癸基十四烷基)的小分子受体(SMAs),即R-M、R-EH和R-DTD.这种侧链调控可以有效调节受体/受体(A/A)和给体/受体(D/A)分子之间的相互作用,从而实现BHJ活性层结构的微调.与R-M和R-DTD相比, R-EH与给体PM6表现出更强的A/A和D/A相互作用,形成更紧密的分子排列,改善了BHJ网络结构,增强了电荷传输和提取性能.因此,在三个体系中, PM6:R-EH不仅表现出超过18%的器件效率,还表现出优异的稳定性.本研究深化了A/A和D/A相互作用对BHJ形貌的协同调节作用,为实现高效且稳定的工业化OSCs提供了新的思路.

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非化学计量溶液区熔法生长大尺寸InSe晶体及表征

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无机材料学报 2024年第5期39卷 554-560页

作者：金敏马玉鹏魏天然林思琪白旭东史迅刘学超上海电机学院材料学院上海201306 上海交通大学材料科学与工程学院上海200240 乌镇实验室桐乡314500 中国科学院上海硅酸盐研究所上海200050

硒化铟(InSe)是一种具有奇异物理性能的III-VI族半导体材料,在光伏、光学、热电等领域有着广泛的应用潜力。由于InSe的非一致熔融特性及InSe、In6Se7和In4Se3之间复杂的包晶反应,制备大尺寸InSe晶体十分困难。本研究采用区熔法制备了InS... 详细信息

硒化铟(InSe)是一种具有奇异物理性能的III-VI族半导体材料,在光伏、光学、热电等领域有着广泛的应用潜力。由于InSe的非一致熔融特性及InSe、In6Se7和In4Se3之间复杂的包晶反应,制备大尺寸InSe晶体十分困难。本研究采用区熔法制备了InSe晶体,该方法具有成本低、固液界面优化等优点。基于In-Se体系的包晶反应,发现In与Se的初始物质的量比对InSe晶体生长非常重要,本工作使用精确非化学计量的In0.52Se0.48溶液生长晶体,使InSe晶体的获得率达到83%左右。实验最终获得了ϕ27 mm×130 mm的晶棒,并成功剥离出尺寸ϕ27 mm×50 mm的片状InSe单晶,XRD图谱中检测到(00l)衍射峰,说明晶体的质量良好。InSe晶体呈现六方结构,各元素在基体中均匀分布,在1800 nm波长下的透射率为~55.1%,带隙能量为~1.22 eV。在800 K下,InSe晶体沿(001)方向的最大电导率σ约为1.55×10^(2)S·m^(-1),垂直于(001)方向的最低热导率κ约为0.48 W·m^(-1)·K^(-1)。上述结果表明,区熔法是制备大尺寸InSe晶体的一种有效方法,可用于制备多类材料。该工作制备的InSe的电学和热学行为也为今后InSe晶体的应用提供了重要参考。

关键词： InSe晶体区熔法非化学计量电导率热导率

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Ultrafast laser state active controlling based on anisotropic quasi-1D material

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Light(Science & Applications) 2024年第4期13卷 717-726页

作者： Zixin Yang Qiang Yu Jian Wu Haiqin Deng Yan Zhang Wenchao Wang Tianhao Xian Luyi Huang Junrong Zhang Shuai Yuan Jinyong Leng Li Zhan Zongfu Jiang Junyong Wang Kai Zhang Pu Zhou College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China. Nanhu Laser laboratory National University of Defense TechnologyChangsha 410073China. i-Lab&key laboratory of Nanodevices and Applications&key laboratory of Nanophotonic materials and devices Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China. School of Applied and Engineering Physics Cornell UniversityIthacaNY 14853USA. State key laboratory of Advanced Optical Communication Systems and Networks School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China. Shanghai key Lab of Modern Optical System University of Shanghai for Science and TechnologyShanghai 200093China

Laser state active controlling is challenging under the influence of inherent loss and other nonlinear effects in ultrafast *** an extension of degree of freedom in optical devices based on low-dimensional materials may be a way ***,the anisotropic quasi-one-dimensional layered material Ta2PdS6 was utilized as a saturable absorber to modulate the nonlinear parameters effectively in an ultrafast system by polarization-dependent *** polarization-sensitive nonlinear optical response facilitates the Ta2PdS6-based mode-lock laser to sustain two types of laser states,i.e.,conventional soliton and noise-like *** laser state was switchable in the single fiber laser with a mechanism revealed by numerical *** coding was further demonstrated in this platform by employing the laser as a codable light *** work proposed an approach for ultrafast laser state active controlling with low-dimensional material,which offers a new avenue for constructing tunable on-fiber devices.

关键词： polarization fiber controlling

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Control of temperature dependent viscosity for manufacturing of Bi-doped active fiber

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International Journal of Extreme Manufacturing 2024年第3期6卷 522-530页

作者： Rui Duan Jingfei Chen Hao Ke Tianxia Wei Ke Zhang Xueliang Li Xu Feng Qiuju Zheng Zhixue He Jianrong Qiu Shifeng Zhou State key laboratory of Luminescent materials and devices School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640People’s Republic of China Guangdong Provincial key laboratory of Fiber Laser materials and Applied Techniques Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and DevicesGuangzhou 510640People’s Republic of China School of materials Science and Engineering Qilu University of TechnologyJinanPeople’s Republic of China Peng Cheng laboratory Shenzhen 518000People’s Republic of China College of Optical Science and Engineering State Key Laboratory of Modern Optical InstrumentationZhejiang UniversityHangzhou 310027People’s Republic of China

Bi-activated photonic materials are promising for various applications in high-capacity telecommunication,tunable laser,and advanced bioimaging and *** various Bi-doped material candidates have been explored,manufacturing of Bi heavily doped fiber with excellent optical activity remains a long-standing ***,a novel viscosity evolutional behavior mediated strategy for manufacturing of Bi-doped active fiber with high dopant solubility is *** intrinsic relation among the evolution of Bi,reaction temperature and viscosity of the glass system is ***,the effective avenue to prevent the undesired deactivation of Bi during fiber drawing by tuning the temperature dependent viscosity evolution is *** applying the strategy,for the first time we demonstrate the success in fabrication of heavily doped Bi active ***,the principal fiber amplifier device is constructed and broadband optical signal amplification is *** findings indicate the effectiveness of the proposed temperature dependent viscosity mediated strategy for developing novel photonic active fiber,and they also demonstrate the great potential for application in the next-generation high-capacity telecommunication system.

关键词： infrared luminescence active fiber optical amplification

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