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quantum Dots Compete at the Acme of MXene Family for the Optimal Catalysis

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nano-micro Letters 2022年第10期14卷 36-82页

作者： Yuhua Liu Wei Zhang Weitao Zheng Key laboratory of Automobile materials MOE and School of Materials Science and Engineeringand Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materialsand Electron Microscopy Centerand International Center of Future ScienceJilin UniversityChangchun 130012People’s Republic of China

It is well known that two-dimensional(2D)MXene-derived quan-tum dots(MQDs)inherit the excellent physicochemical properties of the parental MXenes,as a Chinese proverb says,“Indigo blue is extracted from the indigo plant,but is bluer than the plant it comes from.”Therefore,0D QDs harvest larger surface-to-volume ratio,outstanding optical properties,and vigorous quantum confinement ***,MQDs trigger enormous research enthusiasm as an emerging star of functional materials applied to physics,chemistry,biology,energy conversion,and *** the surface properties of small-sized MQDs include the type of surface functional groups,the functionalized surface directly determines their *** the Nobel Laureate Wolfgang Pauli says,“God made the bulk,but the surface was invented by the devil,”and it is just on the basis of the abundant surface functional groups,there is lots of space to be thereof excavated from *** are witnessing such excellence and even more promising to be ***,MQDs have been widely applied to catalysis,whereas the related reviews are rarely ***,we provide a state-of-the-art overview of MQDs in catalysis over the past five years,ranging from the origin and development of MQDs,synthetic routes of MQDs,and functionalized MQDs to advanced characterization *** explore the diversity of catalytic application and perspectives of MQDs,our review will stimulate more efforts toward the synthesis of optimal MQDs and thereof designing high-performance MQDs-based catalysts.

关键词： MXene quantum dots Catalysis Surface groups Structure

Quasi-Solid-State Ion-Conducting Arrays Composite Electrolytes with Fast Ion Transport Vertical-Aligned Interfaces for All-Weather Practical Lithium-Metal Batteries

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nano-micro Letters 2022年第12期14卷 401-414页

作者： Xinyang Li Yong Wang Kai Xi Wei Yu Jie Feng Guoxin Gao Hu Wu Qiu Jiang Amr Abdelkader Weibo Hua Guiming Zhong Shujiang Ding School of Chemistry Xi’an Key Laboratory of Sustainable Energy Materials ChemistryState Key Laboratory of Electrical Insulation and Power EquipmentXi’an Jiaotong UniversityXi’an 710049People’s Republic of China State Key laboratory for Mechanical Behaviour of materials Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhouZhejiang 313001People’s Republic of China School of materials and energy University of Electronic Science and Technology of ChinaChengdu 610054People’s Republic of China faculty of Science and technology Bournemouth UniversityTalbot CampusFern BarrowPoole BH125BBUK Institute for Applied materials-energy Storage Systems(IAM-ESS) Karlsruhe Institute of Technology(KIT)76344 Eggenstein-LeopoldshafenGermany School of Chemical engineering and technology Xi’an Jiaotong UniversityXi’anShaanxi 710049People’s Republic of China laboratory of Advanced Spectroelectrochemsitry and Li-ion Batteries Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023People’s Republic of China State Key laboratory of Organic-inorganic Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China

The rapid improvement in the gel polymer electrolytes(GPEs)with high ionic conductivity brought it closer to practical applications in solid-state Li-metal *** combination of solvent and polymer enables quasi-liquid fast ion transport in the ***,different ion transport capacity between solvent and polymer will cause local nonuniform Li+distribution,leading to severe dendrite *** addition,the poor thermal stability of the solvent also limits the operating-temperature window of the *** the ion transport environment and enhancing the thermal stability are two major challenges that hinder the application of ***,a strategy by introducing ion-conducting arrays(ICA)is created by vertical-aligned montmorillonite into *** ion transport on the ICA was demonstrated by 6Li solid-state nuclear magnetic resonance and synchrotron X-ray diffraction,combined with computer simulations to visualize the transport *** with conventional randomly dispersed fillers,ICA provides continuous interfaces to regulate the ion transport environment and enhances the tolerance of GPEs to extreme ***,GPE/ICA exhibits high room-temperature ionic conductivity(1.08 mS cm^(−1))and long-term stable Li deposition/stripping cycles(>1000 h).As a final proof,Li||GPE/ICA||LiFePO_(4) cells exhibit excellent cycle performance at wide temperature range(from 0 to 60°C),which shows a promising path toward all-weather practical solid-state batteries.

关键词： Solid-state batteries Composite electrolytes Vertical-aligned ion-conducting arrays Interfacial ion-conduction mechanism All-weather practical electrolyte design

Probing intermolecular interactions of ZnO-nanoparticle-reinforced molten energetic material

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Rare Metals 2022年第9期41卷 3180-3185页

作者： Qing Ma Shu-Ming Wang Mao-Ping Wen Bao-Hui Zheng Heng-Jian Huang Institute of Chemical materials China Academy of Engineering PhysicsMianyang621900China Analysis and Testing Center Southwest University of Science and TechnologyMianyang621900China

In this work,metal oxide nanoparticle ZnO was employed for the reinforcement of *** electronic microscopy(SEM)was used to study the microstructure on the fractured surface of TNT/nano-ZnO,and ultraviolet-visible(UV-Vis)spectroscopy was utilized for structure ***,to understand the reinforcing mechanism between ZnO and TNT,quantum chemistry and molecular dynamics simulation were undertaken to investigate the intermolecular interaction and mechanical *** is concluded that with 2.85 wt%ZnO nanoparticle addition,the amount of voids and defects decreases with the increase in bulk and shear *** modified TNT/ZnO composite has high heat of formation,negative oxygen balance,and good detonation properties,which is expected to be a candidate for high-energy blended explosives.

关键词： 2 4 6-Trinitrotoluene Zinc oxide Intermolecular interaction Molecular dynamics simulation

Electron doping induced semiconductor to metal transitions in ZrSe2 layers via copper atomic intercalation

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nano Research 2018年第9期11卷 4914-4922页

作者： Zahir Muhammad Kejun Mu Haifeng Lv Chuanqiang Wu Zia ur Rehman Muhammad Habib Zhe Sun Xiaojun Wu Li Song National Synchrotron Radiation laboratory CAS Center for Excellence in Nanoscience CAS Key Laboratory of Strongly-coupled Quantum Matter Physics University of Science and Technology of China Hefei 230029 China CAS Key laboratory of materials for energy Conservation Synergetic Innovation Centre of Quantum Information & Quantum Physics CAS Center for Excellence in Nanoscience and Department of Material Science and Engineering University of Science and Technology of China Hefei 230026 China

Atomic intercalation in two-dimensional （2D） layered materials can be used to engineer the electronic structure at the atomic scale and generate tuneable physical and chemical properties which are quite distinct in comparison with the pristine material. Among them, electron-doped engineering induced by intercalation is an efficient route to modulate electronic states in 2D layers. Herein, we demonstrate a semiconducting to metallic phase transition in zirconium diselenide （ZrSe2） single crystals via controllable incorporation of copper （Cu） atoms. Our angle resolved photoemission spectroscopy （ARPES） measurements and first-principles density functional theory （DFT） calculations dearly revealed the emergence of conduction band dispersion at the M/L point of the Brillouin zone due to Cu-induced electron doping in ZrSe2 interlayers. Moreover, electrical measurements in ZrSe2 revealed semiconducting behavior, while the Cu-intercalated ZrSe2 exhibited a linear current-voltage curve with metallic character. The atomic intercalation approach may have high potential for realizing transparent electron-doping systems for many specific 2D-based nanoelectronic applications.

关键词： layered materials phase transition angle resolved photoemission spectroscopy electron doping

Surface Treatment of Inorganic CsPbI_(3) nanocrystals with Guanidinium Iodide for Efficient Perovskite Light-Emitting Diodes with High Brightness

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nano-micro Letters 2022年第4期14卷 277-288页

作者： Minh Tam Hoang Amandeep Singh Pannu Yang Yang Sepideh Madani Paul Shaw Prashant Sonar Tuquabo Tesfamichael Hongxia Wang faculty of Science School of Chemistry and PhysicsQueensland University of TechnologyBrisbaneQLD 4001Australia Centre for materials Science Queensland University of TechnologyBrisbaneQLD 4001Australia School of Mechanical Medical and Process EngineeringFaculty of EngineeringQueensland University of TechnologyBrisbaneQLD 4001Australia Centre for Organic Photonics&Electronics(COPE) School of Chemistry and Molecular BiosciencesThe University of QueenslandBrisbaneQLD 4072Australia

The remarkable evolution of metal halide perovskites in the past decade makes them promise for next-generation optoelectronic *** particular,nanocrystals(NCs)of inorganic perovskites have demonstrated excellent performance for light-emitting and display ***,the presence of surface defects on the NCs negatively impacts their performance in ***,we report a compatible facial post-treatment of CsPbI_(3) nanocrystals using guanidinium iodide(GuI).It is found that the GuI treatment effectively passivated the halide vacancy defects on the surface of the NCs while offering effective surface protection and exciton confinement thanks to the beneficial contribution of iodide and guanidinium *** a consequence,the film of treated CsPbI_(3) nanocrystals exhibited significantly enhanced luminescence and charge transport properties,leading to high-performance light-emitting diode with maximum external quantum efficiency of 13.8%with high brightness(peak luminance of 7039 cd m^(−2) and a peak current density of 10.8 cd A^(−1)).The EQE is over threefold higher than performance of untreated device(EQE:3.8%).The operational half-lifetime of the treated devices also was significantly improved with T50 of 20 min(at current density of 25 mA cm^(−2)),outperforming the untreated devices(T50~6 min).

关键词： CsPbI_(3)perovskites nanocrystals Light-emitting diodes Photoluminescence Surface passivation Guanidinium iodide

模块化局域元素供应技术批量制备12英寸过渡金属硫族化合物（英文）

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Science Bulletin 2023年第14期 1514-1521页

作者：薛国栋隋鑫殷鹏周子琦李修臻程阳郭泉林张帅文耀左勇刚赵翀吴慕鸿高鹏李群仰何军王恩哥张广宇刘灿刘开辉 State Key laboratory for Mesoscopic physics Frontiers Science Center for Nano-optoelectronics School of Physics Peking University International Centre for quantum materials Collaborative Innovation Centre of Quantum Matter Peking University Key laboratory of quantum State Construction and Manipulation (Ministry of Education) Department of Physics Renmin University of China Beijing National laboratory for Condensed Matter physics and Institute of physics Chinese Academy of Sciences Interdisciplinary Institute of Light-Element quantum materials and Research Center for Light-Element Advanced materials Peking University Applied Mechanics laboratory Department of Engineering Mechanics Tsinghua University Key laboratory of Artificial micro-and nano-structures of Ministry of Education Wuhan University Key laboratory of Unconventional Metallurgy (Ministry of Education) Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Songshan Lake materials laboratory

二维过渡金属二硫族化合物(TMDs)因其原子级厚度、高载流子迁移率和超快电荷转移等优点而被认为是下一代半导体器件的核心材料.与传统半导体工业类似,晶圆级TMDs材料的批量生产是其集成电路发展的先决条件.然而,由于生长过程中需要严格...

二维过渡金属二硫族化合物(TMDs)因其原子级厚度、高载流子迁移率和超快电荷转移等优点而被认为是下一代半导体器件的核心材料.与传统半导体工业类似,晶圆级TMDs材料的批量生产是其集成电路发展的先决条件.然而,由于生长过程中需要严格满足多种前驱体的有效传输,TMDs晶圆的制备能力通常局限在每批次单片和小片(主要尺寸为2～4英寸).本研究开发了一种用于批量生产晶圆级TMDs的模块化生长策略,可以制造从2英寸(每批15片)到突破性的12英寸(每批3片)的TMDs晶圆.其中,每个模块包括供应TMDs晶圆生长的自充足的局域前驱体供应单元,通过将多个模块堆叠组装形成阵列可实现批量化制备.利用包括光谱学、电子显微镜和电学测量在内的多种表征技术,可以证明制得的单层薄膜具有高结晶度和大面积均匀性.此外,该模块化单元可以将制备的晶圆级MoS2取代转换为多种结构,例如,Janus型MoSSe结构,MoS(2(1-x))Se2x合金以及MoS2-MoSe2平面异质结等,充分体现了本制备策略的可扩展性.本研究展现了高质量和高产量的晶圆批量生产能力,有望推动二维半导体从实验室规模到工业化规模的无缝过渡,实现与传统硅基技术的互补.

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Synergistic“Anchor‑Capture”Enabled by Amino and Carboxyl for Constructing Robust Interface of Zn Anode

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纳微快报:英文版 2023年第11期15卷 265-280页

作者： Zhen Luo Yufan Xia Shuang Chen Xingxing Wu Ran Zeng Xuan Zhang Hongge Pan Mi Yan Tingting Shi Kai Tao Ben Bin Xu Yinzhu Jiang School of materials Science and engineering Zhejiang UniversityHangzhou 310027People’s Republic of China ZJU‑Hangzhou Global Scientific and Technological Innovation Center Zhejiang UniversityHangzhou 311215People’s Republic of China State Key laboratory of Fluid Power and Mechatronic Systems Key Laboratory of Advanced Manufacturing Technology of Zhejiang ProvinceSchool of Mechanical EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China Institute of Science and technology for New energy Xi’an Technological UniversityXi’an 710021People’s Republic of China State Key laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030People’s Republic of China Guangdong Provincial engineering technology Research Center of Vacuum Coating Technologies and New energy materials Department of PhysicsJinan UniversityGuangzhou 510632GuangdongPeople’s Republic of China Zhejiang-Israel Joint laboratory of Self-Assembling Functional materials Hangzhou 311200People’s Republic of China Mechanical and Construction engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle upon Tyne NE18STUK

While the rechargeable aqueous zinc-ion batteries(AZIBs)have been recognized as one of the most viable batteries for scale-up application,the instability on Zn anode–electrolyte interface bottleneck the further development ***,we utilize the amino acid glycine(Gly)as an electrolyte additive to stabilize the Zn anode–electrolyte *** unique interfacial chemistry is facilitated by the synergistic“anchor-capture”effect of polar groups in Gly molecule,manifested by simultaneously coupling the amino to anchor on the surface of Zn anode and the carboxyl to capture Zn^(2+)in the local *** such,this robust anode–electrolyte interface inhibits the disordered migration of Zn^(2+),and effectively suppresses both side reactions and dendrite *** reversibility of Zn anode achieves a significant improvement with an average Coulombic efficiency of 99.22%at 1 mA cm^(−2)and 0.5 mAh cm^(−2)over 500 *** at a high Zn utilization rate(depth of discharge,DODZn)of 68%,a steady cycle life up to 200 h is obtained for ultrathin Zn foils(20μm).The superior rate capability and long-term cycle stability of Zn–MnO_(2)full cells further prove the effectiveness of Gly in stabilizing Zn *** work sheds light on additive designing from the specific roles of polar groups for AZIBs.

关键词： Zn anode–electrolyte interface Polar groups Synergistic“anchor-capture”effect Side reactions Dendrite growth

micro-nano structured VNb_(9)O_(25)anode with superior electronic conductivity for high-rate and long-life lithium storage

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Journal of materials Science & technology 2021年第24期83卷 66-74页

作者： Mingxing Liang Yongcong Huang Yuda Lin Guisheng Liang Cihui Huang Lan Chen Jiaxin Li Qian Feng Chunfu Lin Zhigao Huang College of physics and energy Fujian Normal UniversityFujian Provincial Solar Energy Conversion and Energy Storage Engineering Technology Research CenterFuzhou 350117China Institute of materials for energy and Environment School of Materials Science and EngineeringQingdao UniversityQingdao 266071China Fujian Provincial Key laboratory of quantum Manipulation and New energy materials Fuzhou 350117China Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting materials and engineering Fuzhou 350117China

The oxygen vacancies and micro-nano structure can optimize the electron/Li+migration kinetics in anode materials for lithium batteries(LIBs).Here,porous micro-nano structured VNb_(9)O_(25)composites with rich oxygen vacancies were reasonably prepared via a facile solvothermal method combined with annealing treatment at 800℃for 30 h(VNb_(9)O_(25)-30 h).This micro-nano structure can enhance the contact of active material/electrolyte,and shorten the Li+diffusion *** introduction of oxygen vacancies can further boosts the intrinsic conductivity of VNb_(9)O_(25)-30 h for achieving excellent LIB *** as-prepared VNb_(9)O_(25)-30 h anode showed advanced rate capability with reversible capacity of 122.2 m A h g^(-1)at 4 A g^(-1),and delivered excellent capacity retention of~100%after 2000 ***,VNb_(9)O_(25)-30 h provides unexpected long-cycle life(i.e.,reversible capacity of 165.7 m A h g^(-1)at 1 A g^(-1)with a high capacity retention of 85.6%even after 8000 cycles).Additionally,coupled with the Li Fe PO4 cathode,the Li Fe PO4//VNb_(9)O_(25)-30 h full cell delivers superior LIB properties with high reversible capacities of 91.6 m A h g^(-1)at 5 C for 1000 ***,such reasonable construction method can assist in other high-performance niobium-based oxides in LIBs.

关键词： Lithium-ion batteries VNb_(9)O_(25)anode micro-nano structure Oxygen vacancies Electrochemical performance

Tuning the performance of nitrogen reduction reaction by balancing the reactivity of N_(2) and the desorption of NH_(3)

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nano Research 2021年第11期14卷 4093-4099页

作者： Lijuan Niu Dandan Wang Kang Xu Weichang Hao Li An Zhenhui Kang Zaicheng Sun Beijing Key laboratory for Green Catalysis and Separation Center of Excellence for Environmental Safety and Biological EffectsFaculty of Environment and LifeBeijing University of TechnologyBeijing100124China Key laboratory of Functional materials physics and Chemistry of the Ministry of Education College of PhysicsJilin Normal UniversitySiping136000China Department of physics Key Laboratory of Micro-Nano MeasurementManipulation and PhysicsMinistry of EducationBeihang UniversityBeijing100191China Jiangsu Key laboratory for Carbon-based Functional materials and Devices Institute of Functional Nano and Soft Materials(FUNSOM)Soochow UniversitySuzhou215123China Macao Institute of materials Science and engineering Macao University of Science and TechnologyTaipa999078Macao SARChina

Electrochemical reduction of nitrogen to ammonia under mild conditions provides an intriguing approach for energy conversion. A grand challenge for electrochemical nitrogen reduction reaction (NRR) is to design a superior electrocatalyst to obtain high performance including high catalytic activity and selectivity. In the NRR process, the three most important steps are nitrogen adsorption, nitrogen activation, and ammonia desorption. We take MoS_(2) as the research object and obtain catalysts with different electronic densities of states through the doping of Fe and V, respectively. Using a combination of experiments and theoretical calculations, it is demonstrated that V-doped MoS_(2) (MoS_(2)-V) shows better nitrogen adsorption and activation, while Fe-doped MoS_(2) (MoS_(2)-Fe) obtains the highest ammonia yield in experiments (20.11 µg·h^(−1)·mg^(−1)cat.) due to its easier desorption of ammonia. Therefore, an appropriate balance between nitrogen adsorption, nitrogen activation, and ammonia desorption should be achieved to obtain highly efficient NRR electrocatalysts.

关键词： nitrogen reduction reaction MoS_(2) electrocatalyst nitrogen-fixing