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High Voltage 2024年第2期9卷 287-295页

作者： Chen Chen Yutong Zhang huijun zhao Zongren Peng Qingyu Wang Xi'an Jiaotong University Xi'anChina

A wireless signal transmission technology based on acoustic carrier is proposed,which overcomes the limitation of electromagnetic signal shielding and shows great potential for in-site monitoring of sliding electrical contact used in gas-insulated switchgear(GIS)/gasinsulated transmission line(GIL).Here,the state parameter of the sliding electrical contact is modulated onto the frequency domain of an ultrasound wave.As a mechanical wave,the ultrasonic wave is immune to electromagnetic shielding,so that it could carry the sensing signal to penetrate the metal shielding layer and transmit to the external terminals of GIS/GIL.The principle and signal modulation process of the acoustic carrier based transmission system have been demonstrated in detail.Both simulation and experiment have been conducted to analyse the system characteristics as well as optimise the system configuration.As a proof-of-concept application,the in situ and on-line monitoring of the thermal rise of a slide electrical contact both in a current loading equivalent model and a prototype of GIS is demonstrated.Experimental results fit well with the physical process,and show a good measurement accuracy of 0.6%and tem-perature sensitivity of 400 Hz/℃.

关键词： electrical potential Acoustic

Operando reconstruction-induced CO_(2)reduction activity and selectivity for cobalt-based photocatalysis

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Nano Research 2023年第4期16卷 4812-4820页

作者： Kun zhao Weiying Pang Shuaiyu Jiang Canyu Hu Porun Liu Dandan Cui Xuefei An Baojuan Tian Chao Gao Pan Zhang Meng Tian Dong Fu huijun zhao Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control School of Environmental Science and EngineeringNorth China Electric Power UniversityBaoding 071003China Interdisciplinary Center for Fundamental and Frontier Sciences Nanjing University of Science and TechnologyJiangyin 214443China Centre for Catalysis and Clean Energy Griffith University Gold Coast CampusLD 4222Australia Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovative Center of Chemistry for Energy MaterialsSchool of Chemistry and Materials Scienceand National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei 230026China School of Physics and BUAA-UOW Joint Research Centre Beihang UniversityBeijing 100191China

The oxygen atom coordination inducing the structure reconstruction of the catalytic site is identified and recognized ambiguously,which is related to accurately declare the mechanism in a dynamic catalytic process.Herein,we demonstrated that the reconstructed catalytic sites would lead to a remarkable performance for photocatalytic CO_(2)reduction.At the initial 4-cycles testing,the in-situ formation of CoOx active sites on the Co(CoP)surface performed an increasing transient activity and selectivity toward CO evolution.The formation of reconstructive Co-O bond and the appearance of intermediate specie CO were simultaneously observed by the pre-operando Raman,revealing the dynamic relationship between catalytic site structure and the photocatalytic properties.Moreover,density functional theory calculations showed that the electronic structure of the reconstructive surface sites could modulate the ability of CO_(2)adsorption and CO desorption.The reduced barrier energy for the rate-determining step finally improved the activity and selectivity of CO_(2)reduction.

关键词： surface reconstruction unsaturated Co-Ox catalytic site balanced relationship photocatalytic CO_(2)reduction

融通集部与体式观照——钱锺书《容安馆札记》中的宋词批评及其学术价值

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文学评论 2024年第3期 215-223页

作者：赵惠俊复旦大学中国语言文学系

《钱锺书手稿集·容安馆札记》散见讨论宋词的文字七万余,集中呈现了钱锺书的宋词研究成果。《容安馆札记》的基本论词方式是考索语典源流,不仅指明了许多词句的宋前诗歌语典渊源,还向下揭示出宋词对于戏曲小说的影响。这样的论词方式... 详细信息

《钱锺书手稿集·容安馆札记》散见讨论宋词的文字七万余,集中呈现了钱锺书的宋词研究成果。《容安馆札记》的基本论词方式是考索语典源流,不仅指明了许多词句的宋前诗歌语典渊源,还向下揭示出宋词对于戏曲小说的影响。这样的论词方式使得宋词的体式成为《容安馆札记》的核心词学论题,相关结论主要包括宋词的体式渊源自齐梁乐府诗,词体有着自我重复的写作体式,圆融浑成的篇章结构体式是词体的最高艺术追求等。在融通集部的学术理念下,点化手段的高下与是否呈现文学共通性构成了《容安馆札记》的主要评词标准。尽管《容安馆札记》的宋词批评并不基于词学传统,但却拾得了散落在传统之外的大量碎金片玉,足供专门之词学参考借鉴。

关键词：钱锺书宋词批评《容安馆札记》

Ru(bpy)_(3)^(2+)-sensitized{001}facets LiCoO_(2) nanosheets catalyzed CO_(2) reduction reaction with 100% carbonaceous products

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Nano Research 2022年第2期15卷 1061-1068页

作者： Shuaiyu Jiang Junxian Liu Kun zhao Dandan Cui Porun Liu Huajie Yin Mohammad Al-Mamun Sean ELowe Weiping Zhang Yu Lin Zhong Jun Chen Yun Wang Dan Wang huijun zhao Centre for Catalysis and Clean Energy Gold Coast campusGriffith UniversityQLD 4222Australia Intelligent Polymer Research Institute and ARC Centre of Excellence for Electromaterials Science University of WollongongWollongongNSW 2500Australia Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangzhou Key Laboratory of Environmental Catalysis and Pollution ControlSchool of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China State Key Laboratory of Biochemical Engineering CAS Centre for Excellence in NanoscienceInstitute of Process EngineeringChinese Academy of ScienceBeijing 100190China

Photosensitized heterogeneous CO_(2) reduction(PHCR)has emerged as a promising means to convert CO_(2) into valuable chemicals,however,challenged by the relatively low carbonaceous product selectivity caused by the competing hydrogen evolution reaction(HER).Here,we report a PHCR system that couples Ru(bpy)32+photosensitizer with{001}faceted LiCoO_(2) nanosheets photocatalyst to simultaneously yield 21.2 and 722μmol·g^(-1)·h^(-1) of CO,and 4.42 and 108μmol·g^(-1)·h^(-1) of CH4 under the visible light and the simulated sunlight irradiations,respectively,with completely suppressed HER.The experimental and theoretical studies reveal that the favored CO_(2) adsorption on the exposed Li sites on{001}faceted LiCoO_(2) surface is responsible for the completely suppressed HER.

关键词： homogeneous-heterogeneous catalysis system ultrathin LiCoO_(2)nanosheets photocatalytic CO_(2)reduction suppressed hydrogen evolution reaction

Operando Converting BiOCl into Bi_(2)O_(2)(CO_(3))_(x)Cl_(y) for Efficient Electrocatalytic Reduction of Carbon Dioxide to Formate

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Nano-Micro Letters 2022年第7期14卷 263-278页

作者： Huai Qin Fu Junxian Liu Nicholas M.Bedford Yun Wang Joshua Wright Peng Fei Liu Chun Fang Wen Liang Wang Huajie Yin Dongchen Qi Porun Liu Hua Gui Yang huijun zhao Centre for Catalysis and Clean Energy Gold Coast CampusGriffith UniversityGold CoastQLD 4222Australia School of Chemical Engineering University of New South WalesSydneyNSW 2052Australia Department of Physics Illinois Institute of TechnologyChicagoIL 60616USA Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237People’s Republic of China Centre for Materials Science School of Chemistry and PhysicsQueensland University of TechnologyBrisbaneQLD 4001Australia

Bismuth-based materials(e.g., metallic, oxides and subcarbonate) are emerged as promising electrocatalysts for converting CO_(2) to formate. However, Bio-based electrocatalysts possess high overpotentials, while bismuth oxides and subcarbonate encounter stability issues. This work is designated to exemplify that the operando synthesis can be an effective means to enhance the stability of electrocatalysts under operando CO_(2)RR conditions. A synthetic approach is developed to electrochemically convert Bi^(O)Cl into Cl-containing subcarbonate(Bi_(2)O_(2)(CO_(3))_(x)Cl_(y)) under operando CO_(2)RR conditions. The systematic operando spectroscopic studies depict that BiOCl is converted to Bi_(2)O_(2)(CO_(3))_(x)Cl_(y) via a cathodic potential-promoted anion-exchange process. The operando synthesizedBi_(2)O_(2)(CO_(3))_(x)Cl_(y) can tolerate-1.0 V versus RHE, while for the wet-chemistry synthesized pure Bi_(2)O_(2)CO_(3),the formation of metallic Bio occurs at-0.6 V versus RHE. At-0.8 V versus RHE, Bi_(2)O_(2)(CO_(3))_(x)Cl_(y) can readily attain a FEHCOO-of 97.9%,much higher than that of the pure Bi_(2)O_(2)CO_(3)(81.3%). DFT calculations indicate that differing from the pure Bi_(2)O_(2)CO_(3)-catalyzed CO_(2)RR, where formate is formed via a *OCHO intermediate step that requires a high energy input energy of 2.69 eV to proceed, the formation of H COO-over Bi_(2)O_(2)(CO_(3))_(x)Cl_(y) has proceeded via a *COOH intermediate step that only requires low energy input of 2.56 eV.

关键词： Carbon dioxide reduction Chloride-containing bismuth subcarbonate Cathodic potential-promoted anion-exchange Stability

Kinematics and dynamics of a particle on a non-simple harmonic vibrating screen

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Particuology 2017年第3期15卷 167-177页

作者： Lijun Wang Zhenjun Ding Shuang Meng huijun zhao Huiqiang Song College of Engineering NortheastAgricultural University Harbin 150030 China Light Industry School Harbin University of Commerce. Harbin 150028 China

The motion of a particle on a screen is directly affected by the motion of the screen if airflow and inter- granular friction are ignored. To study this effect, a mathematical model was established to analyze the motion of a planar reciprocating vibrating screen, and a matrix method was employed to derive its equa- tion of motion. The motion of the screen was simulated numerically and analyzed using MATLAB. The results show that the screen undergoes non-simple harmonic motion and the law of motion of each point in the screen is different. The tilt angle of the screen during screening is not constant but varies according to a specific periodic function. The results of numerical simulations were verified through experiments. A high-speed camera was used to track the motion of three points in the longitudinal direction of the screen. The balance equation for forces acting on a single particle on the screen was derived based on the non-simple harmonic motion of the screen, These forces were simulated using MATLAB. Different types of particle motion like slipping forward, moving backward, and being tossed to different parts of the screen were analyzed. A vibro-impact motion model for a particle on the non-simple harmonic vibrating screen was established based on the nonlinear law of motion of the particle. The stability of fixed points of the map is discussed. Regimes of different particle behaviors such as stable periodic motion, period-doubling bifurcation motion, Hopf bifurcation motion, and chaotic motion were obtained. With the actual law of motion of the screen and the behavior of a particle on the screen, a theoretical basis for design optimization of the screen is provided.

关键词： Vibrating screen Non-simple harmonic motion Particle screening Kinematics and aynamics Numerical simulation

Housing Sulfur in Polymer Composite Frameworks for Li–S Batteries

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Nano-Micro Letters 2019年第1期11卷 282-325页

作者： Luke Hencz Hao Chen Han Yeu Ling Yazhou Wang Chao Lai huijun zhao Shanqing Zhang Centre for Clean Environment and Energy Environmental Futures Research Institute School of Environment and Science Griffith University Gold Coast Campus

Extensive efforts have been devoted to the design of micro-, nano-, and/or molecular structures of sulfur hosts to address the challenges of lithium–sulfur(Li–S) batteries, yet comparatively little research has been carried out on the binders in Li–S batteries. Herein, we systematically review the polymer composite frameworks that confine the sulfur within the sulfur electrode, taking the roles of sulfur hosts and functions of binders into consideration. In particular, we investigate the binding mechanism between the binder and sulfur host(such as mechanical interlocking and interfacial interactions), the chemical interactions between the polymer binder and sulfur(such as covalent bonding, electrostatic bonding, etc.), as well as the beneficial functions that polymer binders can impart on Li–S cathodes, such as conductive binders, electrolyte intake, adhesion strength etc. This work could provide a more comprehensive strategy in designing sulfur electrodes for long-life, large-capacity and high-rate Li–S battery.

关键词： Lithium–sulfur battery Sulfur cathode Binder Binding mechanism Polymer composite frameworks

Meaningful comparison of photocatalytic properties of {001} and {101} faceted anatase TiO2 nanocrystals

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Science Bulletin 2016年第13期61卷 1003-1012页

作者： Yang Lu Yipeng Zang Haimin Zhang Yunxia Zhang Guozhong Wang huijun zhao Key Laboratory of Materials Physics Centre for Environmentaland Energy Nanomaterials Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China University of Science and Technology of China Hefei 230026China Centre for Clean Environment and Energy Griffith UniversityGold Coast Campus Gold Coast QLD 4222 Australia

The facet-dependent photocatalytic performance of TiO_2 nanocrystals has been extensively investigated due to their promising applications in renewable energy and environmental fields. However, the intrinsic distinction in the photocatalytic oxidation activities between the {001}and {101} facets of anatase TiO_2 nanocrystals is still unclear and under debate. In this work, a simple photoelectrochemical method was employed to meaningfully quantify the intrinsic photocatalytic activities of {001} and{101} faceted TiO_2 nanocrystal photoanodes. The effective surface areas of photoanodes with different facets were measured based on the monolayer adsorption of phthalic acid on TiO_2 photoanode surface by an ex situ photoelectrochemical method, which were used to normalize the photocurrents obtained from different faceted photoanodes for meaningful comparison of their photocatalytic activities. The results demonstrated that the {001} facets of anatase TiO_2 nanocrystals exhibited much better photocatalytic activity than that of {101} facets of anatase TiO_2 nanocrystals toward photocatalytic oxidation of water and organic compounds with different functional groups(e.g.,–OH, –CHO, –COOH). Furthermore, the instantaneous kinetic constants of photocatalytic oxidation of pre-adsorbates on {001} faceted anatase TiO_2 photoanode are obviously greater than those obtained at {101} faceted anatase TiO_2 photoanode, further verifying the higher photocatalytic activity of {001} facets of anatase TiO_2.This work provided a facile photoelectrochemical method to quantitatively determine the photocatalytic oxidation activity of specific exposed crystal facets of a photocatalyst, which would be helpful to uncover and meaningfully compare the intrinsic photocatalytic activities of different exposed crystal facets of a photocatalyst.

关键词：二氧化钛纳米晶锐钛矿型光催化特性 TiO2纳米晶 TiO2光催化剂光催化活性催化氧化活性单分子层吸附

Nano-confined ammonia borane for chemical hydrogen storage

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Frontiers of Chemical Science and Engineering 2012年第1期6卷 27-33页

作者： M. A.WAHAB huijun zhao X. D. YAO ARC Centre of Excellence for Functional Nanomaterials Australian Institute for Engineering and Nanotechnology the University of Queensland St Lucia 4072 Australia Centre for Clean Energy and Environment Griffith University Gold Coast 4222 Australia Queensland Micro-and Nanotechnology Centre Griffith University Nathan 4111 Australia

对足够、持续的精力供应有一个大要求。因此，为适用的氢存储材料的搜索由于氢精力的多样化的优点是极其重要的。在这方面，氨 borane (NH3BH3， AB ) 包含 19.6 wt-% 氢被看作了有希望的材料让氢存储应用认识到氢经济，但是与从氢的慢... 详细信息

对足够、持续的精力供应有一个大要求。因此，为适用的氢存储材料的搜索由于氢精力的多样化的优点是极其重要的。在这方面，氨 borane (NH3BH3， AB ) 包含 19.6 wt-% 氢被看作了有希望的材料让氢存储应用认识到氢经济，但是与从氢的慢动力学的限制释放并且象氨和 borazine 那样的踪迹气体的副产品。在这评论，我们在 AB 上介绍最近的研究，考虑到改进在相对低的温度和不受欢迎的煤气的形成的预防 / 减小的动力学上的 nanoconfinement 效果。

关键词：储氢材料硼烷化学氨纳米能源供应微量气体动力学

Robust enhanced hydrogen production at acidic conditions over molybdenum oxides-stabilized ultrafine palladium electrocatalysts

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Nano Research 2021年第1期14卷 268-274页

作者： Ji Sun Xian Zhang Meng Jin Qizhong Xiong Guozhong Wang Haimin Zhang huijun zhao Key Laboratory of Materials Physics Centre for Environmental and Energy NanomaterialsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in Nanoscience InstituteInstitute of Solid State PhysicsChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Centre for Clean Environment and Energy Griffith UniversityGold Coast CampusQLD 4222Australia

Electrochemical water splitting is quite seductive for eco-friendly hydrogen fuel energy production,however,the attainment of highly efficient,durable,and cheap catalysts for the hydrogen evolution reaction(HER)remains challenging.In this study,molybdenum oxides stabilized palladium nanoparticle catalysts(MoO_(x)-Pd)are in situ prepared on commercial carbon cloth(CC)by the facile two-step method of dip-coating and electrochemical reduction.As a self-supported Pd-based catalyst electrode,the MoO_(x)-Pd/CC presents a competitive Tafel slope of 45.75 mV·dec^(-1),an ultralow overpotential of 25 mV,and extremely long cycling durability(one week)in 0.5M H_(2)S0_(4)electrolyte,superior to unmodified Pd catalysts and comparable to commercial Pt mesh electrode.On the one hand,the introduction of MoO_(x)can inhibit the growth of Pd particles to obtain ultrafine Pd nanoparticles,thus exposing more available active sites.On the other hand,density functional theory(DFT)calculation revealed that MoO_(x)on the surface of Pd metal can regulate the electronic structure of Pd metal and enhance its intrinsic catalytic activity of HER.This work suggests that transitional metal nanoparticles stabilized by molybdenum oxides are hopeful approaches for obtaining fruitful hydrogen-producing electrocatalysts.

关键词： MoO_(x) Pd nanoparticles electrocatalysts hydrogen evolution reaction