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Deliberate design of MOF-based pre-catalyst rationalizing the structural reconstruction toward efficient oxygen evolution reaction

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Science China Chemistry 2025年

作者： yunhui chen Meng Tian Zhongqi Zhang Guangzhao Wang Yan Guo Jing Wu Dawei Qi Zhenhua Yan Xiangyu Liu Xi Liu State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering College of Chemistry and Chemical EngineeringNingxia University Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing School of Electronic Information Engineering Yangtze Normal University Frontiers Science Center for New Organic Matter Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) State Key Laboratory of Advanced Chemical Power Sources College of Chemistry Nankai University School of Chemistry and Chemical Engineering In-situ Center for Physical Sciences Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University

Metal-organic frameworks （MOFs）,that have emerged as promising electrocatalysts in oxygen evolution reaction （OER）,usually undergo structural reconstruction to form metal hydroxides as active ***,it remains a great challenge to design and synthesize ideal MOF-based pre-catalysts for properly cognizing and utilizing the reconstruction process toward efficient OER ***,the well-defined MOF-808 is post-modified by 2-hydroxyphosphonoacetic acid （HPAA） to form a micro-adsorber that enables to capture of metal ions ***3+and Ni2+ions are synergistically anchored into the microadsorber,developing a Fe/Ni-containing pre-catalyst that can be dynamically electrooxidized to be an active and stable dual-site electrocatalyst denoted by R-MOF-HPAA@FeNi with abundant metal *** a result,R-MOF-HPAA@FeNi exhibits an excellent OER performance with a low overpotential of 272 mV and Tafel slope of 35.9 m V dec-1,as well as long-term stability over 300 h at 10 m A *** and theoretical calculations suggest the resulting catalyst mainly follows a lattice oxygen mechanism （LOM） of dual-metal-site mechanism （DMSM）.Owing to the chelating role of HPAA,the post-synthesized MOF-HPAA behaves as a trap to uniformly and firmly adhere Fe3+and Ni2+ions,leading to a functionalized MOF-based pre-catalyst which can be structurally evolved into atomic level-distributed OER electrocatalysts.

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Effect of Ellipsoidal Particle Shape on Tribological Properties of Lubricants Containing Nanoparticles

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Chinese Journal of Mechanical Engineering 2024年第4期37卷 231-242页

作者： Ling Pan Zhi Li yunhui chen Guobin Lin School of Advanced Manufacturing Fuzhou UniversityQuanzhou 362251FujianChina School of Mechanical Engineering and Automation Fuzhou UniversityFuzhou 350108FujianChina

Adding nanoparticles can significantly improve the tribological properties of ***,there is a lack of understanding regarding the influence of nanoparticle shape on lubrication *** this work,the influence of diamond nanoparticles(DNPs)on the tribological properties of lubricants is investigated through friction ***,the friction characteristics of lubricants regarding ellipsoidal particle shape are investigated using molecular dynamics(MD)*** results show that DNPs can drastically lower the lubricant's friction coefficientμfrom 0.21 to *** shearing process reveals that as the aspect ratio(α)of the nanoparticles approaches 1.0,the friction performance improves,and wear on the wall *** the same time,the shape of the nanoparticles tends to be *** 0.85≤α≤1.0,rolling is ellipsoidal particles'main form of motion,and the friction force changes according to a periodic sinusoidal *** the range of 0.80≤α<0.85,ellipsoidal particles primarily exhibit sliding as the dominant movement ***αdecreases within this range,the friction force progressively *** friction coefficientμcalculated through MD simulation is 0.128,which is consistent with the experimental data.

关键词： Molecular dynamics simulation Nanoparticle additives Ellipsoidal particles Tribological properties

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MD simulation of nanometric cutting of copper with and without water lubrication

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Science China(Technological Sciences) 2014年第6期57卷 1154-1159页

作者： chen yunhui HAN Huang FANG FengZhou HU XiaoTang School of Mechanical and Mining Engineering the University of Queensland State Key Laboratory of Precision Measuring Technology & Instruments Centre of MicroNano Manufacturing Technology Tianjin University

Three-dimensional molecular dynamics(MD)simulation was carried out to understand the mechanism of water lubrication in nanometric *** water-lubricated cutting was compared with the dry cutting process in terms of lattice deformation,cutting force,heat and pressure distribution,and machined surface *** was found that water molecules effectively reduce the friction between the tool and workpiece,the heat in the cutting zone and the pressure being generated on the tool surface,thus leading to prolonged tool *** molecules also enlarged the pressure-affected area,which decreased the roughness of the machined surface.

关键词： molecular dynamics cutting tools

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Determination of ginsenoside compound K in human plasma by liquid chromatography–tandem mass spectrometry of lithium adducts

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Acta Pharmaceutica Sinica B 2015年第5期5卷 461-466页

作者： yunhui chen Youming Lu Yong Yang Xiaoyan chen Liang Zhu Dafang Zhong Guangdong College of Pharmacy Shanghai Institute of Materia Medica Chinese Academy of Sciences

Ginsenoside compound K(GCK), the main metabolite of protopanaxadiol constituents of Panax ginseng, easily produces alkali metal adduct ions during mass spectrometry particularly with lithium. Accordingly, we have developed a rapid and sensitive liquid chromatography–tandem mass spectrometric method for analysis of GCK in human plasma based on formation of a lithium adduct. The analyte and paclitaxel(internal standard) were extracted from 50 m L human plasma using methyl tertbutyl ether. Chromatographic separation was performed on a Phenomenex Gemini C18 column(50 mm 2.0 mm; 5 μm) using stepwise gradient elution with acetonitrile–water and 0.2 mmol/L lithium carbonate at a flow rate of 0.5 m L/min. Detection was performed in the positive ion mode using multiple reaction monitoring of the transitions at m/z 629-449 for the GCK-lithium adduct and m/z 860-292 for the adduct of paclitaxel. The assay was linear in the concentration range 1.00–1000 ng/m L(r^2>40.9988)with intra- and inter-day precision of ±8.4% and accuracy in the range of 4.8% to 6.5%. Recovery,stability and matrix effects were all satisfactory. The method was successfully applied to a pharmacokinetic study involving administration of a single GCK 50 mg tablet to healthy Chinese volunteers.

关键词： LC MS/MS Ginsenoside compound K Lithium adduct ion Pharmacokinetics

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Research of Electric Cable Path Planning Based on Heuristic Optimization Algorithm in Mixed-Land Scenario

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Energy Engineering 2023年第11期120卷 2629-2650页

作者： Tianfeng Xu Tao Wang chengming Ye Jing Zhang Peng Xi yunhui chen Gengwu Zhang State Grid Hebei Electric Power Economic Research Institute Shijiazhuang050023China Shanghai Electric Power Design Institute Co. Ltd.Shanghai200025China College of Electrical and Power Engineering Taiyuan University of TechnologyTaiyuan030024China

In order to improve the reliability of power supply,the sophisticated design of the structure of electric cable network has become an important issue for modern urban distribution *** this paper,an electric cable path planning model based on heuristic optimization algorithm considering mixed-land scenario is ***,based on different land samples,the kernel density estimation(KDE)and the analytic hierarchy process(AHP)are used to estimate the construction cost of each unit grid,in order to construct the objective function of comprehensive investment for electric cable loop ***,the ant colony optimization(ACO)was improved in pheromone concentration,factor increment and search direction to accelerate the solving speed,and the cable path planning result with minimum construction cost is ***,the feeder’s tie line of the cable loop network is planned by the genetic algorithm(GA)to achieve the minimum operating *** the case analysis,compared with the traditional method,not only the subjective factors in the process of investment estimation can be avoided,but also the speed of model solving and the quality of the optimal solution are improved.

关键词： Cable loop network path planning mixed-land KDE improved ACO GA

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A Thousand Views of the Bund An outsider discovers life in Shanghai

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Beijing Review 2009年第19期52卷 28-29页

作者： chen yunhui

Before I came to Shanghai,I used to think the Bund was just a long I corridor alongside the Huangpu River facing the city’s central business district of Lujiazui in Pudong New *** checking the

关键词： A Thousand Views of the Bund An outsider discovers life in Shanghai

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Manufacturing of graded titanium scaffolds using a novel space holder technique

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Bioactive Materials 2017年第4期2卷 248-252页

作者： yunhui chen Damon Kent Michael Bermingham Ali Dehghan-Manshadi Gui Wang Cuie Wen Matthew Dargusch Queensland Centre for Advanced Materials Processing and Manufacturing(AMPAM) The University of QueenslandSt.Lucia4072Australia School of Science and Engineering University of the Sunshine CoastMaroochydore DCQLD4558Australia ARC Research Hub for Advanced Manufacturing of Medical Devices Australia School of Engineering RMIT UniversityMelbourne3001Australia

To optimize both the mechanical and biological properties of titanium for biomedical implants,a highly flexible powder metallurgy approach is proposed to generate porous scaffolds with graded porosities and pore *** pellets acting as space holders were compacted with titanium powder and then removed by dissolution in water before *** morphology,pore structure,porosity and pore interconnectivity were observed by optical microscopy and *** results show that the porous titanium has porosity levels and pore size gradients consistent with their design with gradual and smooth transitions at the interfaces between regions of differing porosities and/or pore ***,the porous titanium has high interconnectivity between pores and highly spherical pore *** this article we show that this powder metallurgy processing technique,employing the novel sugar pellets as space-holders,can generate porous titanium foams with well-controlled graded porosities and pore *** method has excellent potential for producing porous titanium structures for hard tissue engineering applications.

关键词： Porous scaffolds Titanium Powder metallurgy Space holder Graded porosity

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Preliminary study of inter-hemispheric resting-state mirror functional homotopy in drug-naive patients with obsessive-compulsive disorder

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China Medical Abstracts(Internal Medicine) 2018年第4期35卷 238-239页

作者： chen yunhui Dept Clin Psychothera Sch Psychiat Qiqihaer Med Univ

Objective To explore the pattern of inter-hemispheric resting-state mirror functional homotopy in the drugnaive obsessive-compulsive disorder(OCD).Methods Twenty patients with OCD meeting the DSM-Ⅳ-TR criteria and 20 gender-,age-,education-matched healthy subjects participated in the resting-state brain functional magnetic resonance imaging *** Y-BOCS,HAMD1 7 and HAMA were used to assess the clinical symptoms(***,compulsive,depressive and anxiety symptoms).Based on the data processing & analysis for(resting-state)brain imaging(DPABI)software,a voxel-mirrored homotopic connectivity(VMHC)approach was used to explore the pattern of inter-hemispheric resting-state mirror functional homotopy in OCD;partial correlation analysis was used to analyze the relationship between the whole brain VMHC value and clinical symptoms in *** Compared with the controls,the OCD patients showed decreased VMHC values in the orbitofrontal cortex(0.76±0.23 vs.0.39±0.13,t=-5.46,P<0.01,gaussian random field corrected,two-tailed);the VMHC value of bilateral dorsolateral prefrontal cortex was negatively correlated with obsessive thought(r=-0.912,P<0.01,Bonferroni correction).Conclusion Reduced interhemispheric resting-state functional homotopy in the orbitofrontal cortex is observed in OCD patients,and the interhemispheric resting-state functional homotopy in the bilateral dorsolateral prefrontal cortex may be related with obsessive thought of OCD patients.

关键词： functional homotopy the clinical symptoms interhemispheric

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主动配电网电压分层协调控制策略

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电力系统自动化 2015年第9期39卷 61-67页

作者：陈飞刘东陈云辉电力传输与功率变换控制教育部重点实验室上海交通大学上海市200240 上海交通大学电子信息与电气工程学院上海市200240 国家能源智能电网(上海)研发中心上海市200240

主动配电网中间歇式能源接入给配电网电压控制提出了更高需求。与此同时,可控分布式电源、储能装置及新型配电系统柔性交流输电设备等可控元素的加入在相当程度上增大了配电网电压控制复杂程度,使现有的控制方式受到了挑战。结合主动配... 详细信息

主动配电网中间歇式能源接入给配电网电压控制提出了更高需求。与此同时,可控分布式电源、储能装置及新型配电系统柔性交流输电设备等可控元素的加入在相当程度上增大了配电网电压控制复杂程度,使现有的控制方式受到了挑战。结合主动配电网可控元素复杂多样及控制结构灵活多变的特点提出了主动配电网电压分层协调控制策略。该策略基于配电网辐射状网架结构将控制区域划分为自治控制区域与协调控制区域两部分,并利用等效节点电压上下限指标区分控制边界,规避常规电压控制常见的调节振荡问题,在此基础上采用自上而下的方式,充分利用主动配电网有载调压变压器、分布式电源以及电容器等电压调节设备实现电压越限的调节,并通过算例仿真验证了该控制策略的有效性。

关键词：主动配电网智能配电系统电压控制策略分层协调控制分布式电源

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聚苯乙烯模块墙体空腔简易模块化装配式建筑应用

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施工技术 2017年第16期46卷 40-43页

作者：苏云辉陈宁新疆建筑科学研究院有限责任公司新疆乌鲁木齐830054

根据新疆地区的气候条件和实际情况,通过模拟计算、现场检测、实地调研、理论分析等手段,对聚苯乙烯模块墙体空腔简易模块化装配式建筑的安全性、节能性、保温性及经济性等开展研究,结合实际案例分析对比实际效果,探讨聚苯乙烯模块墙体... 详细信息

根据新疆地区的气候条件和实际情况,通过模拟计算、现场检测、实地调研、理论分析等手段,对聚苯乙烯模块墙体空腔简易模块化装配式建筑的安全性、节能性、保温性及经济性等开展研究,结合实际案例分析对比实际效果,探讨聚苯乙烯模块墙体空腔简易模块化装配式建筑在新疆巴州富民安居房和农村住房建设中的应用前景。

关键词：装配式聚苯乙烯空腔模块安全性保温节能经济性

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