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Chinese Chemical Letters 2023年第1期34卷 493-498页

作者： Chenxu Zhao Menghui xi Jinrong Huo Chaozheng He Ling Fu Institute of Environment and Energy Catalysis School of Materials Science and Chemical EngineeringXi’an Technological UniversityXi’an 710021China School of Sciences Xi’an Technological UniversityXi’an 710021China College of Resources and Environmental Engineering Tianshui Normal UniversityTianshui 741001China

The production of CH_(3.COOH from CO_(2)and CH_(4) has stimulated much interest due to the high energy density of C2 *** kinds of catalysts have been developed while the high dissociation barrier of CH_(4) and low selectivity still hinders the efficiency of the *** have herein proposed a novel catalyst with single metals loaded on 2D BC_(3.N_(2) substrate(M@2D-BC_(3.N_(2))based on density functional *** numerous candidates,Pt@2D-BC_(3.N_(2) possesses the most favorable reactivity with an ultralow barrier of CH_(4) splitting(0.26 e V),which is due to the efficient capture ability of CH_(4) on Pt ***,the selectivity for CH_(3.COOH is also very high,which mainly stems from the unique electronic properties of molecules and substrate:The degenerated states,including s,px,pyand pz,in CO_(2)reflects the existence of delocalizedπbonds between C and *** can interact with states of Pt(s),Pt(pz),Pt(dxz),Pt(dyz),and Pt(z2)in Pt@2D-BC_(3.N_(2).The kinetics model also proves that our system can promote CH_(3.COOH production via simply increasing the temperature or the coverage of CH_(4) and CO_(2).Our results provide a reasonable illustration in clarifying mechanism and propose promising candidates with high reactivity for further study.

关键词： Density functional theory CO_(2)/CH4 coactivation 2D BC_(3.N_(2)substrate CH_(3.COOH production

High specific surface area inherited from sea-urchin-like AACH clusters prepared by a novel spray precipitation

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Rare Metals 2022年第11期41卷 3684-3693页

作者： xi-Yue Zhang Le Zhang Tian-Yuan Zhou Bing-Heng Sun Shuai Wei Yi-Fei Cao Ming-Yuan Liu Peng-Fei Sang Cong Wei Wei Chen Hao Chen School of Physics and electronic Engineering Jiangsu Normal UniversityXuzhou221116China key Laboratory of materials for High Power Laser Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai201800China Xuzhou Fuchang electronic Technology Co. LtdXuzhou221116China

High specific surface of(α/γ)-Al_(2)O_(3.powder is essential for its applications in adsorbents,catalysts or ceramic raw ***,the phase transformation from precursor to oxide powder inevitably experiences the hightemperature calcination process which coarsens or agglomerates the particles,and then loses the high dispersity and activity.

关键词： materials adsorbent calcination

A library of carbon-supported ultrasmall bimetallic nanoparticles

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Nano research 2020年第10期13卷 2735-2740页

作者： Shi-Long Xu Shan-Cheng Shen Ze-Yue Wei Shuai Zhao Lu-Jie Zuo Ming-xi Chen Lei Wang Yan-Wei Ding Ping Chen Sheng-Qi Chu Yue Lin Kun Qian Hai-Wei Liang Hefei National Laboratory for Physical Sciences at the Microscale Departm ent of ChemistryUniversity of Science and Technology of ChinaHefei 230026China Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education InstitutesCAS Key Laboratory of Materials for Energy Conversion and Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026China School of Chemistry and Chemical Engineering Anhui UniversityHefei 230601China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Small-sized bimetallic nanoparticles that possess numerous accessible metal sites and optimal geometric/electronic structures show great promise for advanced synergetic catalysis but remain synthetic challenge so ***,an universial synthetic method is developed for building a library of bimetallic nanoparticles on mesoporous sulfur-doped carbon supports,consisting of 24 combinations of 3.noble metals(that is,Pt,Rh,Ir)and 7 other metals,with average particle sizes ranging from 0.7 to 1.4 *** synthetic strategy is based on the strong metal-support interaction arising from the metal-sulfur bonding,which suppresses the metal aggregation during the H2-reduction at 700℃ and ensure the formation of small-sized and alloyed bimetallic *** enhanced catalytic properties of the ultrasmall bimetallic nanoparticles are demonstrated in the dehydrogenation of propane at high temperature and oxidative dehydrogenations of N-heterocycles.

关键词： bimeallic nanoparticles sulfur doped carbon catalysis ultrasmall metal-support interaction

First-Stokes Wavelengths at 1175.8 and 1177.1 nm Generated in a Diode End-Pumped Nd:YVO_4/LuVO_4 Raman Laser

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Chinese Physics Letters 2019年第1期36卷 32-35页

作者： Qing-Qing Zhou Shen-Cheng Shi Si-Meng Chen Yan-Min Duan xi-Mei Zhang Jing Guo Bin Zhao Hai-Yong Zhu College of Mathematics Physics and Electronic Information Engineering Wenzhou University International Collaborative Laboratory of 2D materials for Optoelectronics Science and Technology of ministry of {3. College of Optoelectronic Engineering Shenzhen University College of Chemistry and Chemical Engineering Fuzhou University

A diode end-pumped acousto-optic Q-switched Nd:YVO_4/LuVO_4 Raman laser is demonstrated. Both YVO_4 and LuVO_4 can work as Raman gain, and slightly different active vibration modes of both crystals can result in different first-Stokes wavelengths. The output characteristic as the Raman competition between YVO_4 and LuVO_4 crystals for the laser systems with both shared cavity and coupled cavity is experimentally *** the shared cavity, simultaneous Raman conversion in both YVO_4 and LuVO_4 crystals is achieved with dualwavelength emission at 1175.8 and 1177.1 nm. The maximum output power of 1.03.W and the conversion efficiency of 10.3. are obtained. The 0.84 W single first Stokes wavelength at 1177.1 nm with LuVO_4 Raman conversion is achieved with the coupled cavity. The results show that the coupled cavity with short Raman cavity can obtain a narrow pulse width. The separated laser crystal and Raman gain media with different vanadates in shared cavity have advantages in achieving dual-wavelength lasers with small frequency intervals.

关键词： Tox wavelength Diode side pump Raman laser

复合材料转向架构架及其疲劳损伤分析方法研究综述

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北京交通大学学报 2019年第1期43卷 42-53页

作者：王曦付晨北京交通大学机械与电子控制工程学院北京100044

复合材料相比于金属材料具有更优良的性能,可以满足轨道交通车辆对轻量化、低能耗、舒适性的需要,逐渐成为各国轨道交通领域关注的热点.中国将复合材料应用于轨道交通车辆结构的研究起步较晚,缺乏相关经验,需要开展关于转向架构架这种... 详细信息

复合材料相比于金属材料具有更优良的性能,可以满足轨道交通车辆对轻量化、低能耗、舒适性的需要,逐渐成为各国轨道交通领域关注的热点.中国将复合材料应用于轨道交通车辆结构的研究起步较晚,缺乏相关经验,需要开展关于转向架构架这种大型主承载结构疲劳损伤分析的深入研究.本文介绍了国内外应用复合材料技术于转向架构架上的研究进展,重点综述了在复合材料转向架构架上广泛应用的纤维增强复合材料层合板的疲劳损伤分析方法,简要分析了几种疲劳分层损伤模型,并对目前研究中面临的困难和挑战进行了总结.

关键词：复合材料转向架构架疲劳损伤分层

Interfacial defect engineering and photocatalysis properties of hBN/MX_(2)(M=Mo,W,and X=S,Se)heterostructures

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Chinese Physics B 2022年第6期31卷 625-634页

作者： Zhi-Hai Sun Jia-xi Liu Ying Zhang Zi-Yuan Li Le-Yu Peng Peng-Ru Huang Yong-Jin Zou Fen Xu Li-xian Sun School of Material Science and Engineering Guilin University of Electronic TechnologyGuangxi Key Laboratory of Information MaterialsGuangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialsGuilin 541004China

Van der Waals(VDW)heterostructures have attracted significant research interest due to their tunable interfacial properties and potential applications in many areas such as electronics,optoelectronic,and *** this work,the influences of interfacial defects on the electronic structures and photocatalytic properties of hBN/MX_(2)(M=Mo,W,and X=S,Se)are studied using density functional theory *** results reveal that the band alignment of hBN/MX_(2) can be adjusted by introducing vacancies and atomic *** type-Ⅰband alignment of the host structure is maintained in the heterostructure with n-type doping in the hBN ***,the band alignment changed into the type-Ⅱheterostructrue due to V_(B) defect and p-type doping is introduced into the hBN *** can conduce to the separation of photo-generated electron-hole pairs at the interfaces,which is highly desired for heterostructure *** addition,two Z-type heterostructures including h BN(BeB)/MoS_(2),hBN(Be_(B))/MoSe_(2),and hBN(V_(N))/MoSe_(2)are achieved,showing the decreasing of band gap and ideal redox potential for water *** results reveal the possibility of engineering the interfacial and photocatalysis properties of hBN/MX_(2) heterostructures via interfacial defects.

关键词： hBN/MX_(2)heterostructures interfacial defect electronic state photocatalytic properties

THE INVESTIGATION ON THE FORMATIONOF(K_(0.5)Na_(0.5))NbO_(3.PEROVSKITE PHASE IN MECHANOCHEMICAL SYNTHESIS

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Journal of Advanced Dielectrics 2011年第4期1卷 479-485页

作者： JINGxiAN ZHU MINGBIN ZHOU ZHENRONG LI ZHUO XU xi YAO electronic materials research Laboratory International Center for Dielectric research xi'an jiaotong university Xi'an 710049P.R.China

teviseuzobeptehberzoriLead-free(K_(0.5)Na_(0.5))NbO_(3.(KNN)nanopowder with perovskite structure was synthesized bymechanochemical synthesis method *** order to investigate the perovskite phaseformation of KNN powders during the mechanochemical synthesis process,we set up three millingroutes with different transmission ratios(W_(v)/W_(p))acting on the mixed starting powders of Na_(2)CO_(3.,K_(2)CO_(3.and Nb_(2)O_(5).KNN perovskite phase was not detected by XRD under the lowtransmission ratios-2 with the shock power of 273.*** the transmission ratios wasincreased to-2.75 with the shock power of 683.4 W,KNN perovskite phase was formed aftermilling for 22 *** on these results it has been found,that in shock mode process(SMIP),thathigher shock power is helpful for the formation KNN perovskite *** critical shock powerPaitial and critical weight-normalized cumulative shock energy P^(*)_(critical)in KNN system are *** with SMP,when W_(v)/W_(p),=-3.5,in friction mode process(FMiP),KNN per-ovskite phase was formed after milling for 5 *** implis that FMP benefit the formation of KNNperovslkite phase,The morphology of KNN powder was observed by transmsion electronmicroscopy(TEM).

关键词： (K_(0.5)Na_(0.5))NbO_(3.(KNN) mechanochemical synthesis perovskite structure

Co13.8—metalloxocubes:a new class of perovskite-like neutral clusters with cubic aromaticity

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National Science Review 2021年第1期8卷 89-97页

作者： Lijun Geng Mouyi Weng Cong-Qiao Xu Hanyu Zhang Chaonan Cui Haiming Wu xin Chen Mingyu Hu Hai Lin Zhen-Dong Sun xi Wang Han-Shi Hu Jun Li Jiaxin Zheng Zhixun Luo Feng Pan Jiannian Yao Beijing National Laboratory for Molecular Sciences (BNLMS) State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences School of Physics Shandong University School of Advanced materials Peking University Shenzhen Graduate School Department of Chemistry Southern University of Science and Technology university of Chinese Academy of Sciences School of Physics and Electrical Engineering Kashi University College of Science Beijing Jiaotong University Department of Chemistry and key Laboratory of Organic Optoelectronics and Molecular Engineering of ministry of {3. Tsinghua University

Exploring stable clusters to understand structural evolution from atoms to macroscopic matter and to construct new materials is interesting yet challenging in chemistry. Utilizing our newly developed deep-ultraviolet laser ionization mass spectrometry technique, here we observe the reactions of neutral cobalt clusters with oxygen and find a very stable cluster species of Co13.8that dominates the mass distribution in the presence of a large flow rate of oxygen gas. The results of global-minimum structural search reveal a unique cubic structure and distinctive stability of the neutral Co13.8cluster that forms a new class of metal oxides that we named as ‘metalloxocubes’. Thermodynamics and kinetics calculations illustrate the structural evolution from icosahedral Co13.o the metalloxocube Co13.8with decreased energy, enhanced stability and aromaticity. This class of neutral oxygen-passivated metal clusters may be an ideal candidate for genetic materials because of the cubic nature of the building blocks and the stability due to cubic aromaticity.

关键词： metalloxocube oxygen-passivated metal cluster cubic aromaticity cluster materials magnetic property

Sol-gel Synthesis and Photoluminescence of InP Nanocrystals Embedded in Silica Glasses

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四川大学学报(自然科学版) 2005年第S1期42卷 247-页

作者： YANG He-qing HUANG Da-ming YAO xi key Laboratory of Macromolecular Science of Shaanxi Province Shaanxi Normal UniversityXi’an 710062China Surface Physics Laboratory Fudan UniversityShanghai 200433China electronic materials research Laboratory Xi’an Jiaotong UniversityXi’an 710049China

III-Vsemiconductor nanocrystals rarely exist as spherical inclusions inside glasses, due to difficulties during their preparation, such as high toxic reagents or fast oxidation under usual glass technology temperatures. In this article a sol-gel method for synthesis of InP nanocrystals embedded in silica glasses was described. Gels were synthesized by hydrolysis of a complex solution of Si(OC 2 H 5 ) 4 , InCl 3.4H 2 O and PO(OC 2 H 5 ) 3.. Then, the gels were heated at 600 o C in the presence of H 2 gas to form fine cubic InP crystallites. Raman spectrum showed InP longitudinal-optic mode (3.2cm -1 ) and transverse-optic mode (3.3.m -1 ). The size of InP nanocrystals was found to be from 2 to 8 nm in diameter by transmission electron microscopy. A strong photoluminescence with peaks at, 606, 73.nm 856 nm was observed from 3.nP/100SiO 2 nanocompositions. The temperature-and excitation power-dependent PL spectra from the nanocomposition are measured in order to confirm the origin of the PL spectra. These behaviors of the three peaks emissions suggest that 606, 73., and 856 nm emissions do not have the same origin. The PL with peak at 856nm arise from the cubic InP nanocrystallites embedded in the SiO 2 gel glasses. The 605 and 73. nm emissions may arise from the SiO 2 gel glass matrix or the interface between the InP crystallite core and SiO2 glass matrix.

关键词： InP nanocrystals nanocompositions Sol-gel method photoluminescence and spectrum

Highly aligned lithiophilic electrospun nanofiber membrane for the multiscale suppression of Li dendrite growth

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eScience 2022年第6期2卷 655-665页

作者： Jianan Wang Qianyue Ma Shiyi Sun Kai Yang Qiong Cai Emilia Olsson xin Chen Ze Wang Amr MAbdelkader Yinshi Li Wei Yan Shujiang Ding Kai xi Department of Environmental Science and Engineering Xi'an Key Laboratory of Solid Waste Recycling and Resource RecoverySchool of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an 710049China Department of Applied Chemistry School of ChemistryUniversity Engineering Research Center of Energy Storage Materials and Chemistry of Shaanxi ProvinceState Key Laboratory for Electrical Insulation and Power EquipmentXi'an Jiaotong UniversityXi'an 710049China Department of Chemical and Process Engineering Faculty of Engineering and Physical SciencesAdvanced Technology InstituteUniversity of SurreyGuildford GU27XHSurreyEnglandUK key Laboratory of Thermo-Fluid Science and Engineering of ministry of education School of Energy and Power EngineeringXi'an Jiaotong UniversityXi'anShaanxi710049China Advanced research Center for Nanolithography Science Park 1061098 XGAmsterdamthe Netherlands Institute of Physics and Institute for Theoretical Physics University of AmsterdamPostbus 944851090 GLAmsterdamthe Netherlands Faculty of Science and Technology Bournemouth UniversityTalbot CampusFern BarrowPooleEnglandBH125BBUK

Using inorganic fibrous membranes as protective layers has yielded success in suppressing dendrite ***,conventional fibrous membranes usually have large voids and low affinity for Li,promoting inhomogeneous charge distribution and allowing some dendrites to ***,we introduce a highly aligned TiO_(2)/SiO_(2)(A-TS)electrospun nanofiber membrane as a protective layer for the Li metal *** A-TS membrane is fabricated by a custom-made electrospinning system with an automatic fiber alignment collector that allows control of the fibers’*** the scale of the individual fibers,their high binding energies with Li can attract more“dead”Li by reacting with the SiO_(2) component of the composite,avoiding uncontrollable deposition on the metal *** the membrane scale,these highly ordered structures achieve homogeneous contact and charge distribution on the Li metal surface,leaving no vulnerable areas to nucleate dendrite ***,the excellent mechanical and thermal stability properties of the A-TS membrane prevent any potential puncturing by dendrites or thermal runaway in a ***,an A-TS@Li anode exhibits stable cycling performance when used in both Li-S and Li-NCM811 batteries,highlighting significant reference values for the future design and development of high-energy-density metal-based battery systems.

关键词： Aligned structure Protective layerLi dendrite Lithium sulfur battery Li metal battery