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Understanding fundamentals of electrochemical reactions with tender X-rays:A new lab-based operando X-ray photoelectron spectroscopy method for probing liquid/solid and gas/solid interfaces across a variety of electrochemical systems

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Chinese Journal of Catalysis 2022年第11期43卷 2858-2870页

作者： Chiyan Liu Qiao Dong Yong Han yijing zang Hui Zhang Xiaoming Xie Yi Yu Zhi Liu State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China University of Chinese Academy of Sciences Beijing 100049China

Electrocatalysis is key to improving energy efficiency,reducing carbon emissions,and providing a sustainable way of meeting global energy ***,elucidating electrochemical reaction mechanisms at the electrolyte/electrode interfaces is essential for developing advanced renewable energy ***,the direct probing of real-time interfacial changes,i.e.,the surface intermediates,chemical environment,and electronic structure,under operating conditions is challenging and necessitates the use of in situ ***,we present a new lab-based instrument commissioned to perform in situ chemical analysis at liquid/solid interfaces using ambient pressure X-ray photoelectron spectroscopy(APXPS).This setup takes advantage of a chromium source of tender X-rays and is designed to study liquid/solid interfaces by the“dip and pull”*** of the main components was carefully described,and the results of performance tests are *** a three-electrode setup,the system can probe the intermediate species and potential shifts across the liquid electrolyte/solid electrode *** addition,we demonstrate how this system allows the study of interfacial changes at gas/solid interfaces using a case study:a sodium–oxygen model ***,the use of APXPS in electrochemical studies is still in the early stages,so we summarize the current challenges and some developmental *** the challenges,we expect that joint efforts to improve instruments and the electrochemical setup will enable us to obtain a better understanding of the composition–reactivity relationship at electrochemical interfaces under realistic reaction conditions.

关键词： Tender X-rays Ambient pressure X-ray photoelectron spectroscopy Electrocatalysis Liquid/solid interface Gas/solid interface

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The critical role of electrochemically activated adsorbates in neutral OER

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Science China Materials 2020年第12期63卷 2509-2516页

作者： Longsheng Zhang Haiyang Yuan Liping Wang Hui Zhang yijing zang Yao Tian Yunzhou Wen Fenglou Ni Hao Song Haifeng Wang Bo Zhang Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science and Laboratory of Advanced MaterialsFudan UniversityShanghai 200438China Key Laboratory for Advanced Materials Key Laboratory for Advanced MaterialsCentre for Computational Chemistry and Research Institute of Industrial CatalysisEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesCAS Center for Excellence in Superconducting ElectronicsShanghai 200050China Key Laboratory of Systems Bioengineering School of Chemical Engineering and TechnologySynBio Research PlatformCollaborative Innovation Centre of Chemical Science and EngineeringTianjin UniversityTianjin 300072China

Developing efficient electrocatalysts for the oxygen evolution reaction(OER)under neutral conditions is important for microbial electrolysis cells(MECs).However,the OER kinetics in neutral electrolytes at present are extremely sluggish,resulting in high overpotentials that greatly limit the energy conversion efficiencies of *** studies failed to probe the adsorbates on surface metal sites of catalysts at the atomic scale and elucidate their influence on the catalytic activities,which has impeded the rational design of efficient neutral OER catalysts with optimal surface ***,using in situ transmission electron microscopy(TEM),in situ X-ray photoelectron spectroscopy(XPS)and in situ low-energy ion scattering studies,we have identified,for the first time,that the electrochemically activated adsorbates on surface metal sites play a critical role in boosting the neutral OER activities of Ru-Ir binary oxide(RuxIryO2)*** adsorbate-activated RuxIryO2on a glassy carbon electrode achieved a low overpotential of 324 m V at10 m A cm-2in neutral electrolyte,with a 36-fold improvement in turnover frequency compared with that of Ir *** application in an MEC system,the resulting full cell showed a decreased voltage of 1.8 V,200 m V lower than the best value reported to date,facilitating efficient synthesis of poly(3-hydroxybutyrate)from bioelectrochemical *** functional theory(DFT)studies revealed that the enhanced OER activity of RuxIryO2catalyst arose from local structural distortion of adjacent adsorbate-covered Ru octahedra at the catalyst surface and the consequently decreased adsorption energies of OER intermediates on Ir active center.

关键词： electrocatalysis oxygen evolution reaction adsorbates neutral electrolytes

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Hydrogen sulfide reduces oxidative stress in Huntington's disease via Nrf2

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Neural Regeneration Research 2025年第6期20卷 1776-1788页

作者： Zige Jiang Dexiang Liu Tingting Li Chengcheng Gai Danqing Xin yijing Zhao Yan Song Yahong Cheng Tong Li Zhen Wang Department of Physiology School of Basic Medical SciencesCheeloo College of MedicineShandong UniversityJinanShandong ProvinceChina Department of Medical Psychology and Ethics School of Basic Medicine SciencesCheeloo College of MedicineShandong UniversityJinanShandong ProvinceChina Department of Neurosurgery Surgery Qingdao Municipal HospitalQingdaoShandong ProvinceChina

The pathophysiology of Huntington's disease involves high levels of the neurotoxin quinolinic acid. Quinolinic acid accumulation results in oxidative stress, which leads to neurotoxicity. However, the molecular and cellular mechanisms by which quinolinic acid contributes to Huntington's disease pathology remain unknown. In this study, we established in vitro and in vivo models of Huntington's disease by administering quinolinic acid to the PC12 neuronal cell line and the striatum of mice, respectively. We observed a decrease in the levels of hydrogen sulfide in both PC12 cells and mouse serum, which was accompanied by down-regulation of cystathionine β-synthase, an enzyme responsible for hydrogen sulfide production. However, treatment with NaHS(a hydrogen sulfide donor) increased hydrogen sulfide levels in the neurons and in mouse serum, as well as cystathionine β-synthase expression in the neurons and the mouse striatum, while also improving oxidative imbalance and mitochondrial dysfunction in PC12 cells and the mouse striatum. These beneficial effects correlated with upregulation of nuclear factor erythroid 2-related factor 2 expression. Finally, treatment with the nuclear factor erythroid 2-related factor 2inhibitor ML385 reversed the beneficial impact of exogenous hydrogen sulfide on quinolinic acid-induced oxidative stress. Taken together, our findings show that hydrogen sulfide reduces oxidative stress in Huntington's disease by activating nuclear factor erythroid 2-related factor 2,suggesting that hydrogen sulfide is a novel neuroprotective drug candidate for treating patients with Huntington's disease.

关键词： apoptosis cystathionine-β-synthase nuclear factor erythroid 2-related factor 2 Huntington's disease hydrogen sulfide mitochondrion neuroplasticity oxidative stress quinolinic acid reactive oxygen species

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“Hot street”of crime detection in London borough and lockdown impacts

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Geo-Spatial Information Science 2023年第4期26卷 716-732页

作者： Yuying Wu yijing Li CUSP London Department of InformaticsKing’s College LondonLondonUK

In recent years,the police intervention strategy“Hot spots policing”has been effective in combating ***,as cities are under the intense pressure of increasing crime and scarce police resources,police patrols are expected to target more accurately at finer geographic units rather than ballpark“hot spot”*** study aims to develop an algorithm using geographic information to detect crime patterns at street level,the so-called“hot street”,to further assist the Criminal Investigation Department(CID)in capturing crime change and transitive moments *** algorithm applies Kernel Density Estimation(KDE)technique onto street networks,rather than traditional areal units,in one case study borough in London;it then maps the detected crime“hot streets”by crime *** was found that the algorithm could successfully generate“hot street”maps for Law Enforcement Agencies(LEAs),enabling more effective allocation of police patrolling;and bear enough resilience itself for the Strategic Crime Analysis(SCA)team’s sustainable utilization,by either updating the inputs with latest data or modifying the model parameters(*** kernel function,and the range of spillover).Moreover,this study explores contextual characteristics of crime“hot streets”by applying various regression models,in recognition of the best fitted Geographically Weighted Regression(GWR)model,encompassing eight significant contextual factors with their varied effects on crimes at different *** discussed the impact of lockdown on crime rates,it was apparent that the land-use driven mobility change during lockdown was a fundamental reason for changes in ***,these research findings have provided evidence and practical suggestions for crime prevention to local governors and policy practitioners,through more optimal urban planning(*** Traffic Neighborhoods),proactive policing(*** the listed top 10“Hot Streets”of crime),publicizing of laws and regulations,and installations

关键词： Hot street crime kernel density estimation spatial regression lockdown mobility change

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Dehydrogenation characteristics of LiAlH4 improved by in-situ formed catalysts

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Journal of Energy Chemistry 2016年第5期25卷 868-873页

作者： Jiaxing Cai Lei zang Lipeng Zhao Jian Liu yijing Wang Institute of New Energy Material Chemistry Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Key Laboratory of Advanced Energy Materials Chemistry (MOE) Tianjin Key Lab of Metal Nankai Universitytianjin 300070China

The hydrogen storage properties and catalytic mechanism of FeCl-doped LiAlHwere investigated in minute details. LiAlH-2 mol% FeClsamples start to release hydrogen at 76 °C, which is 64 °C lower than that of as-received LiAlH. Isothermal desorption measurements show that the 2 mol% FeCl-doped sample releases 7.0 wt% of hydrogen within 17 min at 250 °C. At lower temperatures of 110 °C and 80 °C, the sample can release 4.4 wt% and 3 wt% of hydrogen, respectively. The apparent activation energy of LiAlH-2 mol% FeClsamples for R2 is 105.02 k J/mol, which is 67 k J/mol lower than that of pure LiAlH. The reaction between LiAlHand FeClduring ball milling was found by analyzing the X-ray diffraction results,and Fe-Al particles formed in-situ from the reaction act as the real catalyst for the dehydrogenation of LiAlH.

关键词： Hydrogen storage materials Dehydrogenation Complex hydrides LiAlH4 FeCl2 doping In-situ formed catalysts

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Could social media reflect acquisitive crime patterns in London?

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Journal of Safety Science and Resilience 2022年第2期3卷 115-127页

作者： Zenghui Wang yijing Li CIM Warwick UniversityCoventryCV47ALUK CUSP London King’s College LondonLondonWC2R 2LSUK

Embraced within the framework of crime opportunities integrated with Social Disorganization theory and Broken Windows theory,this paper intends to explore the patterns of four types of acquisitive crimes,using social media data,i.e.,Twitter,Foursquare and cross-sectional data acquired through text analysis *** Greater London as the study area,models like negative binominal regression(NBR)and geographically weighted regression(GWR)are performed to illustrate the aggregated relationships between acquisitive crimes and crime opportunities at London-wide and sub-regional MSOAs levels *** results work towards to hypotheses that:the tweets sentiment could reflect property-related crime rates positively in light of Broken Windows Theory;more tweets with negative sentiment may incur increases in acquisitive *** contributed to existing studies in(1)providing empirical evidence for integrating these three theories;(2)complementing current research on local discrepancies of acquisitive crimes by utilising both GWR and NBR models;(3)challenging the traditional stereotypes about racial disparities with the finding that ethnic heterogeneity and instrumental crimes have counterintuitive association,especially taking education factor into consideration;(4)implicating some localised acquisitive crime prevention strategies to policy makers in light of the reality that the relationship between local variations and different crime types may vary by place.

关键词： Crime opportunity Acquisitive crime Social disorganization Broken windows Twitter Foursquare Big data

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Recent advances in additive-enhanced magnesium hydride for hydrogen storage

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Progress in Natural Science:Materials International 2017年第1期27卷 41-49页

作者： Ying Wang yijing Wang School of Chemistry and Chemical Engineering Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Jiangsu Normal University Key Laboratory of Advanced Energy Materials Chemistry Nankai University Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin) Nankai University

The discovery of new hydrogen storage materials has greatly driven the entire hydrogen storage technology forward in the past decades. Magnesium hydride, which has a high hydrogen capacity and low cost, has been considered as one of the most promising candidates for hydrogen storage. Unfortunately, extensive efforts are still needed to better improve its hydrogen storage performance, since MgH;suffers from high operation temperature, poor dehydrogenation kinetic, and unsatisfactory thermal management. In this paper, we present an overview of recent progress in improving the hydrogenation/de-hydrogenation performance of MgH;, with special emphases on the additive-enhanced MgH;composites. Other widely used strategies（e. g. alloying,nanoscaling, nanoconfinement） in tuning the kinetics and thermodynamics of MgH;are also presented. A realistic perspective regarding to the challenges and opportunities for further researches in MgH;is proposed.

关键词： Hydrogen storage MgH2 Additives Alloying Nanoscaling Nanoconfinement

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Infl uence of the slope aspect on the ectomycorrhizal fungal community of Quercus variabilis Blume in the middle part of the Taihang Mountains,North China

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Journal of Forestry Research 2021年第1期32卷 385-400页

作者： Songpo Wei yijing Song Liming Jia College of Forestry Beijing Forestry UniversityBeijing 100083People’s Republic of China

The slope aspect is one of the most critical topographic factors in mountainous *** is known,however,about the eff ect of the aspect on the ectomycorrhizal(ECM)fungal ***,we know very little about the composition of ECM fungal communities associated with Quercus variabilis,which is widely distributed in East *** this study,we compared the richness,community composition,and exploration types of ECM fungi associated with *** between predominantly south-and north-facing slopes in the Taihang Mountain,North China for the fi rst *** was extracted from the root tips of ***,and Illumina MiSeq sequencing was used to identify ECM *** total,168 operational taxonomic units belonging to 28 genera were detected,and the ECM community was found to be dominated by Russula,Inocybe,Tomentella,Scleroderma,and *** with the north-facing slopes,the ECM communities on the south-facing slopes had higher *** community composition and exploration types were directly aff ected by the slope ***,the aspect-induced edaphic variables,such as total phosphorus,total nitrogen,total potassium,pH,and soil water content,were important sources of variation in ECM fungal richness and distributions of exploration *** erent genera tended to be distributed in various slope ***,Genea,and Clavulina were signifi cantly enriched in north-facing slopes,while Geopora,Helvelosebacina,Scleroderma,Gyroporus,Astraeus,Boletus,Tricholoma,Hebeloma,Cortinarius and unclassifi ed Thelephoraceae were more abundant in south-facing *** ECM fungi were obviously enriched in the south-facing slope,but there was no statistical diff erence between hydrophilic among the south-and north-facing *** study deepened our knowledge of the aspect-driven variation in ECM fungal communities associated with ***.

关键词： Ectomycorrhizal community Illumina sequencing Quercus variabilis Slope aspect Edaphic factors

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Bicriteria Algorithms for Approximately Submodular Cover Under Streaming Model

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Tsinghua Science and Technology 2023年第6期28卷 1030-1040页

作者： yijing Wang Xiaoguang Yang Hongyang Zhang Yapu Zhang Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China School of Mathematics and Statistics Ningbo UniversityNingbo 315211China Beijing Institute for Scientific and Engineering Computing Beijing University of TechnologyBeijing 100124China

In this paper,we mainly investigate the optimization model that minimizes the cost function such that the cover function exceeds a required threshold in the set cover problem,where the cost function is additive linear,and the cover function is non-monotone approximately *** study the problem under streaming model and propose three bicriteria approximation ***,we provide an intuitive streaming algorithm under the assumption of known optimal objective *** intuitive streaming algorithm returns a solution such that its cover function value is no less thanα(1−ϵ)times threshold,and the cost function is no more than(2+ϵ)^(2)/(ϵ^(2)ω^(2))⋅κ,whereκis a value that we suppose for the optimal solution andαis the approximation ratio of an algorithm for unconstrained maximization problem that we can call *** we present a bicriteria streaming algorithm scanning the ground set multi-pass to weak the assumption that we guess the optimal objective value in advance,and maintain the same bicriteria approximation *** we modify the multi-pass streaming algorithm to a single-pass one without compromising the performance ***,we also propose some numerical experiments to test our algorithm’s performance comparing with some existing methods.

关键词： approximately submodular linear additive streaming model bicriteria algorithm

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Zero-Dynamics Attacks for Multi-Agent Systems Without Velocity Measurements

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Journal of Systems Science & Complexity 2024年第5期37卷 1809-1831页

作者： GAO Jinming WANG yijing ZUO Zhiqiang ZHANG Wentao Tianjin Key Laboratory of Intelligent Unmanned Swarm Technology and System School of Electrical and Information EngineeringTianjin UniversityTianjin 300072China Continental-NTU Corporate Lab School of Electrical and Electronic EngineeringNanyang Technological UniversitySingapore 639798Singapore

This paper studies the periodic zero-dynamics attacks(ZDAs)in multi-agent systems without velocity measurements under directed ***,two types of attack modes are addressed,i.e.,infinite number and finite number of zero-dynamics *** the former case,the authors show that the consensus of the considered system cannot be *** the latter case,the dynamic evolution of the agents is investigated and it is found that only attacking the rooted agents can destroy the ***,a sufficient condition which quantifies whether or not the consensus value is destroyed is given,revealing the relationship among parameters of system model,filter and attack ***,simulations are carried out to verify the effectiveness of the theoretical findings.

关键词： Consensus directed graph multi-agent systems zero-dynamics attacks

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