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Plasmon-induced local electric field improved hydrogen evolution reaction on Ag/mo_(2)C nanosheets

Nano Research 2025年第1期18卷 270-277页

作者： HuangJingWei Li Xin Zi Jun Wu Xinli wang Li Zhu Qiyou wang Jianfu Han Junwei Fu Hongm.i Li Kai Huang yu Chen min Liu School of Physics State Key Laboratory of Powder MetallurgyHunan Joint International Research Center for Carbon Dioxide Resource UtilizationCentral South UniversityChangsha 410083China School of metallurgy and Environment Central South UniversityChangsha 410083China institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Nano-institute munich Faculty of PhysicsLudwig-Maxilimians-Universität MünchenMünchen 80539Germany Hunan institute of Advanced Sensing and information Technology Xiangtan UniversityXiangtan 411105China

Electrocatalytic water splitting offers a promising way for hydrogen production with near-zero ***,such as molybdenum carbides(mo_(2)C),are promising materials for hydrogen evolution reaction(HER)but still suffer from poor intrinsic water activation ***,we developed a plasmon-induced local electric field(PiLEF)strategy to solve this ***(Ag)nanoparticles decorated mo_(2)C nanosheets(Ag/mo_(2)C)were successfully prepared by electrostatic *** visible light excited the PiLEF on Ag/mo_(2)C remarkably reducing the activation energy by 92.7 kJ·mol^(-1)from 147.3 kJ·mol^(-1)of mo_(2)C to 54.6 kJ·mol^(-1).As a result,the plasmonic Ag/mo_(2)C significantly enhances~2.3-fold of the current density from 2.8 mA·cm^(-2)of mo_(2)C to 6.5 mA·cm^(-2)at-3 V *** and reduces the overpotential by 104 mV from 403 mV of dark state to 299 mV of light state at the current density of 10 mA·cm^(-2),achieving better performance than reported *** research demonstrates that PiLEF enhances HER activities,offering a potential strategy for boosting the intrinsic activities of catalysts.

关键词： sliver particles plasmon effect field effect hydrogen evolution reaction(HER) electrocatalysis

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蛹虫草水提物影响人胃癌细胞BGC-823不同RCD通路的转录组分析

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食品工业科技 2025年第4期46卷 1-9页

作者：崔明琦于凯雯宋扬徐方旭王升厚王泽沈阳师范大学生命科学学院辽宁沈阳110034 辽宁省功能性蛹虫草重点实验室辽宁沈阳110034 沈阳师范大学实验教学中心辽宁沈阳110034

目的：基于转录组测序技术，分析预测蛹虫草（XG）水提物影响人胃癌细胞BGC-823生长活性的主要调节性细胞死亡（Regulated cell death，RCD）信号通路。方法：mTT法测定XG水提物对胃癌细胞增殖能力的影响，转录组测序分析显著差异基因及... 详细信息

目的：基于转录组测序技术，分析预测蛹虫草（XG）水提物影响人胃癌细胞BGC-823生长活性的主要调节性细胞死亡（Regulated cell death，RCD）信号通路。方法：mTT法测定XG水提物对胃癌细胞增殖能力的影响，转录组测序分析显著差异基因及其KEGG富集情况，获得凋亡、自噬、坏死性凋亡及铁死亡信号通路的hub基因（10个）。通过激光共聚焦、流式细胞术、qRT-PCR进一步验证XG水提物对胃癌细胞凋亡的诱导情况。结果：XG水提物对人胃癌细胞BGC-823生长活性的抑制作用具有剂量依赖特征。转录组测序共筛选到5885个差异表达基因，并在凋亡（P=0.001）及自噬（P=0.008）信号通路存在显著性富集，除铁死亡外，其它信号通路的hub基因的表达量均被显著性抑制，包括caspase依赖性凋亡信号通路的关键因子CASP3、CASP9、CASP7和APAF1，自噬小体形成相关的基因ULK1、ULK2、UVRAG、Atg14及Atg5。细胞学检测结果显示，胃癌细胞经XG水提物处理后呈典型的凋亡形态学特征，早期凋亡率为24.8%，细胞周期阻滞于G2/m期。qRT-PCR检测显示，BCL2、BCL2L1、CASP3、CASP9及XiAP的表达受到显著抑制（PiF表达量上调明显（P<0.01），与转录组测序结果一致。结论：蛹虫草主要通过Caspase非依赖性线粒体凋亡途径抑制人胃癌细胞BGC-823的生长活性，同时可以影响自噬等信号通路的激活，为蛹虫草在功能性食品的开发提供理论支持。

关键词：蛹虫草凋亡自噬坏死性凋亡铁死亡

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Assessing the dynamics of O_(2) desorption from cobalt phthalocyanine by in situ electrochemical scanning tunneling microscopy

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Journal of Energy Chemistry 2024年第11期98卷 144-148页

作者： yu-Qi wang yue Feng Xiang wang Dong wang CAS Key Laboratory of molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Science(BNLMS)Institute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

We report here the in situ electrochemical scanning tunneling microscopy(ECSTm) study of cobalt phthalocyanine(CoPc)-catalyzed O_(2) evolution reaction(OER) and the dynamics of CoPc-O_(2) *** self-assembled CoPc monolayer is fabricated on Au(111) substrate and resolved by ECSTm.in 0.1 m KOH *** OH^(-)adsorption on CoPc prior to OER is observed in ECSTm *** OER,the generated O_(2) adsorbed on Co Pc is observed in the CoPc *** step experiment is employed to monitor the desorption of OER-generated O_(2) from CoPc,which results in the decreasing surface coverage of CoPc-O_(2) with *** rate constant of O_(2) desorption is evaluated through data *** insights into the dynamics of Co-O_(2) dissociation at the molecular level via in situ imaging help understand the role of Co-O_(2) in oxygen reduction reaction(ORR) and OER.

关键词： Electrochemical scanning tunneling microscopy Oxygen evolution reaction Cobalt phthalocyanine

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Determination and ecological risk assessment of arsenic and mercury in sediments from the Changjiang River Estuary and adjacent East China Sea

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Acta Oceanologica Sinica 2021年第4期40卷 32-38页

作者： yu'na Zhang Qianwen wang Central Laboratory Qingdao Agricultural UniversityQingdao 266109China

Arsenic(As)and mercury(Hg)are pollutants presented in marine environment.A process of atomic fluorescence spectrometry was proposed for the simultaneous determination of As and Hg in marine sediment samples(n=38)collected from the Changjiang River Estuary and adjacent East China *** proposed method used an optimized pretreatment procedure in an aqua regia–H_(2)O digestion *** of As and Hg increased to97%and 98%,respectively,with suitable precisions(2.7%–4.1%)under optimized process *** and Hg were widely presented in these samples,with the ranges of content values were 2.39–8.77μg/g for As and48.03–410.8 ng/g for *** indicate that anthropogenic factors strongly influence the abundances of As and Hg in investigated *** preliminary environmental risk assessment was investigated using the igeoaccumulation index(igeo)and anthropogenic contribution rate(m).Findings reveal that Hg demonstrates a strong ecological risk(with average values of 1.3 and 72%for igeo and m,respectively)in the sediments from the Changjiang River Estuary and adjacent East China ***,Hg should be considered in future investigations.

关键词： arsenic mercury marine sediment spatial distributions ecological risk

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Generic Existence of infinitely many Non-contractible Closed Geodesics on Compact Space Forms

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Acta mathematica Sinica,English Series 2024年第7期40卷 1674-1684页

作者： Hui Liu yu Chen wang School of mathematics and Statistics Wuhan UniversityWuhan430072P.R.China School of mathematics Tianjin Normal UniversityTianjin300384P.R.China

Let m=S^(n)/Γand h be a nontrivial element of finite order p inπ_(1)(Μ),where the integers n,p≥2,Γis a finite abelian group which acts freely and isometrically on the n-sphere and therefore m.is diffeomorphic to a compact space *** this paper,we prove that there are infinitely many non-contractible closed geodesics of class[h]on the compact space form with C^(r)-generic Finsler metrics,where 4≤r≤∞.The conclusion also holds for Cr-generic Riemannian metrics for 2≤r≤∞.The proof is based on the resonance identity of non-contractible closed geodesics on compact space forms.

关键词： Compact space forms non-contractible closed geodesics generic Finsler metrics resonance identity

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Self-nucleation of Patterned Polymer Thin Films Defined by Soft Lithography

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Chinese Journal of Polymer Science 2022年第6期40卷 651-657页

作者： Ze-Qian wang Yi-meng wang Xing-yu wang Bing-Hua wang Jing-Bo Chen Chang-yu Shen Bin Zhang School of materials Science&Engineering Zhengzhou UniversityZhengzhou 450002China

The nucleation of crystals is often a determining step in the phase transition of materials,but it rem.ins a challenge to control the density and specific location of nuclei *** we fabricated the isolated single crystals of uniform size with controlled number density and spatial distribution by self-nucleation of patterned dendritic *** lithography creates the periodic void space on the surface of poly(ethylene oxide)-b-poly(2-vinyl pyridine)(PEO-b-P2VP)block copolymer thin films and provides spatial redistribution of polymers,leading to the preferential nucleation and subsequent oriented growth of dendrites in the periodic arrays of imprinted *** morphology and thermal stability of the patterned crystals can be adjusted by tuning embossing conditions(e.g.,temperature and pressure).Furthermore,in the self-nucleation technique,the annealing temperature and heating rate are used as the feedback parameters to map the number density and spatial distribution of regrown single *** PEO-b-P2VP crystalline pattern can be used as a versatile template for large-area manufacturing of selective metal patterns for electronic devices and other applications.

关键词： Self-nucleation imprint lithography Atomic force microscopy Crystallization pattern Selective metal pattern

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Surface engineering based on in situ electro-polymerization to boost the initial Coulom.ic efficiency of hard carbon anode for sodium.ion battery

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Rare metals 2022年第5期41卷 1616-1625页

作者： Cheng-Xin yu yu Li Zhao-Hua wang Xin-Ran wang Ying Bai Chuan Wu Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China Yangtze Delta Region Academy of Beijing institute of Technology Jiaxing 314019China

Hard carbon(HC) is considered as a commercial candidate for anode materials of sodium.ion batteries due to its low cost and excellent capacity. However, the problem of low initial Coulom.ic efficiency is still urgently needed to be solved to promote the industrialization of *** this paper, 2,2-dimethylvinyl boric acid(DEBA) is used to modify the surface of HC to prepare HC-DEBA materials. During the cycling, the C = C bonds of DEBA molecules will be in situ electro-polymerized to form a polymer network, which can act as the passive protecting layer to inhibit irreversible decomposition of electrolyte,and induce a thinner solid electrolyte interface with lower interface impedance. Therefore, HC-DEBA has higher initial Coulom.ic efficiency and better cycling stability. in ester-based electrolyte, the initial Coulom.ic efficiency of the optimized HC-DEBA-3% increases from 65.2% to77.2%. After 2000 cycles at 1 A·g^(-1), the capacity retention rate is 90.92%. moreover, it can provide a high reversible capacity of 294.7 m Ah·g^(-1) at 50 mA·g^(-1). This simple surface modification method is ingenious and versatile,which can be extended to other energy storage materials.

关键词： Sodium.ion battery Hard carbon initial Coulom.ic efficiency Solid electrolyte interface Surface modification Ester electrolyte

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Recent Progress on modification Strategies of Alloy-based Anode materials for Alkali-ion Batteries

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Chemical Research in Chinese Universities 2021年第2期37卷 200-209页

作者： WU Ying YAO yu wang Lifeng yu Yan Hefei National Laboratory for Physical Sciences at the microscale Department of Materials Science and EngineeringCAS Key Laboratory of Materials for Energy ConversionUniversity of Science and Technology of ChinaHefei230026P.R.China Dalian National Laboratory for Clean Energy(DNL) Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023P.R.China

Alkali-ion batteries,including lithium.ion batteries(LiBs),sodium.ion batteries(NiBs)and potassium.ion batteries(KiBs),with alloy-based anodes exhibit huge potential in high energy density due to the natural abundance,high theoretical capacity as well as suitable operating ***,the practical application is severely hindered by the huge volume variation based on the alloying mechanism and inferior conductivity,especially for red phosphorus(P)and silicon(Si)anodes,which induces poor rate capability and fast capacity ***,we will briefly review fundamental advantages and challenges of alloy-based anode ***,effective modification strategies of alloy-based anode materials for boosting the performance would be emphasized and ***,we will share our perspectives and some opportunities to obtain high-performance alloy-based anode materials for further application.

关键词： Alloy-based anode Alkali-ion battery modification strategy

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identifying essential proteins based on dynamic protein-protein interaction networks and RNA-Seq datasets

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Science China(information Sciences) 2016年第7期59卷 61-71页

作者： Xuequn SHANG yu wang Bolin CHEN School of Computer Science Northwestern Polytechnical University

The identification of essential proteins is not only important for understanding organism structure on the molecular level, but also beneficial to drug-target detection and genetic disease prevention. Traditional methods often employ various centrality indices of static protein-protein interaction(PPi) networks and/or gene expression profiles to predict essential proteins. However, the prediction accuracy of most methods still has room to be further improved. in this study, we propose a strategy to increase the prediction accuracy of essential protein identification in three ways. Firstly, RNA-Seq datasets are employed to construct integrated dynamic PPi networks. Using a RNA-Seq dataset is expected to give more accurate predictions than using microarray gene expression profiles. Secondly, a novel integrated dynamic PPi network is constructed by considering both the co-expression pattern and the co-expression level of the RNA-Seq data. Thirdly, a novel two-step strategy is proposed to identify essential proteins from two known centrality indices. Numerical experiments have shown that the proposed strategy can increase the prediction accuracy dramatically, which can be generalized to many existing methods and centrality indices.

关键词： essential protein dynamic protein network RNA-Seq data gene co-expression pattern m2 measure

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Atmospheric environmental capacity and urban atmospheric load in China's m.inland

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Science China Earth Sciences 2018年第1期61卷 33-46页

作者： XU DaHai wang yu ZHU Rong State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of CmA Chinese Academy of Meteorological Sciences Beijing 100081 China National Climatic Center Beijing 100081 China

Daily and annual average atmospheric environmental capacity coefficient(A-value) sequences for China's m.inland are calculated from hourly data recorded at 378 ground stations over 1975–2014. A-values at different recurrence intervals are calculated by fitting the sequences to Pearson type iii distribution curves. Based on these A-values and source-sink balance(reference concentration 100 μg m^(-3)), atmospheric environmental capacities at the recurrence intervals are calculated for all of China's m.inland and each provincial administrative region. The climate average atmospheric environmental capacity reference value for the entire m.inland is 2.169×10~7 t yr^(-1). An urban atmospheric load index is defined for analyses of the impact of population density on the urban atmospheric environment. Analyses suggest that this index is also useful for differentiating whether air quality changes are attributable to varying meteorological conditions or variations of artificial emission *** guiding the control of unorganized emission sources are derived for preventing air quality deterioration during urban expansion and population concentration.

关键词： Atmospheric environmental capacity Pearson type iii distribution Recurrence interval Urban atmospheric load index Emission rate density

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