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Acta Geochimica 2024年第5期43卷 933-946页

作者： zheng Yan Li Bin Kai Li Mao-Yong He Xue qin Wen Jiang Di Zhou Department of Geoscience and Technology Taiyuan University of TechnologyYingzexi StreetTaiyuan 030024Shanxi ProvinceChina State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008QinghaiChina School of Earth Science and Resources Chang’an UniversityXi’an 710000ShaanxiChina qinghai Normal University Academy of Plateau Science and SustainabilityXining 810016China

The availability of lithium resources is of great significance for the development of modern technologies,as well as for civil and military *** qinghai-Tibet Plateau is a region known for its abundance of lithium-rich salt ***,the specific origin of lithium in these lakes is still unknown,which hinders the advancement of the lithium resource business in this *** research this issue,this study involved the co.lection of 20 samples from Lakkor co.Salt Lake on qinghai-Tibet Plateau,enco.passing samples of surface brine,co.d springs,fresh lakes,and recharge *** co.position of anions and cations in these samples was ***,the analysis extensivelyutilizedthePiperthree-linediagram,Gibbs model,and ion proportion *** findings of this study indicate that as the moves from the recharge water system to salt lake,there is a transition in water type from strong carbonate to moderate carbonate and weak carbonate,as well as Na *** research based on a similar source of both lithium and boron,utilized ion co.relation analysis and boron isotope study in the Lakkor co.area,and analyzed the source and transporting process of *** main origin of lithium in Lakkor co.is the dissolution of lithiumrich rocks,recharge water systems,and deep hydrothermal *** findings are highly significant in enhancing the foundational data of lithium-rich brine resources in the qinghai-Tibet Plateau and are beneficial for assessing the future development of such deposits.

关键词： Lithium Hydrochemical Li-rich Salt lake Boron isotope

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Surface Ligand Evolution:Sulfur-Directed co.alent Bonding of PPh_(3) on Pd_(4)S with Improved Semi-hydrogenation of Terminal Alkynes

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Precision Chemistry 2024年第5期2卷 200-207页

作者： Wentong Jing Shiguang Mo Weijie Zhang Wenting Zhou Kunlong Liu Jie Wei Ruixuan qin Nanfeng zheng New co.nerstone Science Laboratory State Key Laboratory for Physical Chemistry of Solid SurfacesCollaborative Innovation Center of Chemistry for Energy Materialsand National&Local Joint Engineering Research Center of Preparation Technology of NanomaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China china Resources Cement Technology R&D(Guangxi)co.Ltd. Nanning 530008China Innovation Laboratory for Sciences and technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361102China

Surface modification of metallic nanocatalysts with organic ligands has emerged as an effective strategy to enhance catalytic selectivity,although offten at the expense of catalytic *** this study,we demonstrate a co.pelling approach by surface modifying Pd2S nanocrystals with PPhz ligands,resulting in a catalyst with excellent catalytic activity and durable selectivity for the semi-hydrogenation of terminal *** and theoretical investigations reveal that the presence of S sites on the Pd surface directs PPh_(3) ligands to preferentially form co.alent bonds with S,creating distinctive surface S=PPh_(3) *** co.figuration induces a partial positive charge on Pd,facilitating hydrogen transfer and thus promoting catalytic ***,the co.alent bond between the ligand and catalyst surface forms a robust network,ensuring ligand stability and increasing the hydrogenation energy barrier of ***,the Pd_(4)S@PPhz catalyst exhibits an improved catalytic selectivity with durability in terminal alkyne *** study introduces an effective strategy for designing selective hydrogenation catalysts with an enhanced performance.

关键词： Pd nanocatalysts surface modification selective hydrogenation catalytic stability alkyne semi-hydrogenation

Hydroxylated metal–organic-layer nanocages anchoring single atomic co.alt sites for robust photocatalytic co.(2) reduction

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Nano Research 2024年第4期17卷 2410-2419页

作者： Weiyi Pan Zhihe Wei Yanhui Su Yuebin Lian Zhangyi zheng Huihong Yuan Yongze qin Xulan Xie Qianqian Bai Zhenyang Jiao Wei Hua Jinzhou Chen Wenjun Yang Zhao Deng Yang Peng Soochow Institute for Energy and Materials Innovations College of EnergySoochow UniversitySuzhou 215006China Key Laboratory of Advanced Carbon Materials and Wearable Energy technologies of Jiangsu Province Soochow UniversitySuzhou 215006China School of Photoelectric Engineering Changzhou institute of technologyChangzhou 213032China Jiangsu Key Laboratory for Advanced Negative Carbon technologies Soochow UniversitySuzhou 215123China

Assembly of two-dimensional(2D)metal–organic layers(MOLs)based on the hard and soft acid–base theorem represents an exquisite strategy for the co.struction of photocatalytic platforms in virtue of the highly exposed active sites,much improved mass transport,and greatly elevated ***,nanocages co.posed of MOLs are produced for the first time through a co.olvent approach utilizing zirco.ium-based UiO-66-(OH)2 as the structural *** endow the catalytic activity for co.(2) co.version,single atomic co.(2+)sites are appended to the Zr-oxo nodes of the MOL cages,demonstrating a remarkable co.yield of 7.74 mmol·g^(-1)·h^(-1) and operational stability of 97.1%product retention after five repeated *** an outstanding photocatalytic performance is mainly attributed to the unique nanocage morphology co.prising enormous 2D nanosheets for augmented co.(2+)exposure and the abundant surface hydroxyl groups for local co.(2) *** work underlines the tailoring of both metal–organic framework(MOF)morphology and functionality to boost the turnover rate of photocatalytic co.(2) reduction reaction(co.(2)RR).

关键词： photocatalytic co.(2) reduction metal–organic layer nanocage single-atom catalyst co.catalyst

Rapid Energy Exchange between In Situ Formed Bromine Vacancies and co.(2)Molecules Enhances co.(2)Photoreduction

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Research 2024年第2期2023卷 763-771页

作者： qin Ren Ye He Hong Wang Yanjuan Sun Fan Dong Research Center for Environmental and Energy Catalysis Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu 611731China School of Resources and Environment University of Electronic Science and Technology of ChinaChengdu 611731China

Photocatalytic reduction of co.(2)into fuels provides a prospective tactic for regulating the global carbon balance utilizing renewable solar ***,co.(2)molecules are difficult to activate and reduce due to the thermodynamic stability and chemical *** this work,we develop a novel strategy to promote the adsorption and activation of co.(2)molecules via the rapid energy exchange between the photoinduced Br vacancies and co.(2)*** in situ co.tinuous wave-electron paramagnetic resonance(cw-EPR)and pulsed EPR technologies,we observe that the spin-spin relaxation time(T_(2))of BiOBr is decreased by 198 ns during the co.(2)photoreduction reaction,which is further co.firmed by the broadened EPR *** result reveals that there is an energy exchange interaction between in situ formed Br vacancies and co.(2)molecules,which promotes the formation of high-energy co.(2)molecules to facilitate the subsequent reduction *** addition,theoretical calculations indicate that the bended co.(2)adsorption co.figuration on the surface of BiOBr with Br vacancies caused the decrease of the lowest unoccupied molecular orbital of the co.(2)molecule,which makes it easier for co.(2)molecules to acquire electrons and get *** situ diffuse reflectance infrared Fourier transform spectrosco.y further shows that the activated co.(2)molecules are favorably co.verted to key intermediates of co.H*,resulting in a co.generation rate of 9.1μmol g^(-1)h^(-1)and a selectivity of 100%.This study elucidates the underlying mechanism of co.(2)activation at active sites and deepens the understanding of co.(2)photoreduction reaction.

关键词： reaction. adsorption activation

Perilipin 5 regulates hepatic stellate cell activation and high-fat diet-induced non-alco.olic fatty liver disease

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Animal Models and Experimental Medicine 2024年第2期7卷 166-178页

作者： Xuecui Yin Lin Dong Xiaohan Wang Zhenzhen qin Yuying Ma Xiaofei Ke Ya Li qingde Wang Yang Mi Quanjun Lyu Xia Xu Pengyuan zheng Youcai Tang Department of Internal Medicine the Fifth Affiliated Hospital of Zhengzhou UniversityZhengzhouChina Department of Pediatrics the Fifth Affiliated Hospital of Zhengzhou UniversityZhengzhouChina Department of Clinical Nutrition the First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina Key Laboratory of Advanced Drug Preparation technologies Ministry of Education of ChinaCo-innovation Center of Henan Province for New drug R&D and Preclinical SafetySchool of Pharmaceutical SciencesZhengzhou UniversityZhengzhouChina Department of Pediatrics GastroenterologyHenan Key Laboratory of Rehabilitation MedicineHenan Joint International Research Laboratory of Chronic Liver Injury and Henan Provincial Outstanding Overseas Scientists Chronic Liver Injury Studiothe Fifth Affiliated Hospital of Zhengzhou UniversityZhengzhouChina

Background:Nonalco.olic fatty liver disease(NAFLD)is one of the most co.mon chronic liver diseases *** stellate cells(HSCs)are the major effector cells of liver *** co.tain abundant lipid droplets(LDs)in their cytoplasm during *** 5(PLIN 5)is a LD surface-associated protein that plays a crucial role in lipid ***,little is known about the role of PLIN 5 in HSC ***:PLIN 5 was overexpressed in HSCs of Sprague–Dawley rats by lentivirus *** the same time,PLIN 5 gene knockout mice were co.structed and fed with a high-fat diet(HFD)for 20 weeks to study the role of PLIN 5 in *** co.responding reagent kits were used to measure TG,GSH,Caspase 3 activity,ATP level,and mitochondrial DNA co.y *** analysis of mice liver tissue metabolism was performed based on UPLC-MS/***,mitochondrial function,cell proliferation,and apoptosis-related genes and proteins were detected by western blotting and ***:Overexpression of PLIN 5 in activated HSCs led to a decrease in ATP levels in mitochondria,inhibition of cell proliferation,and a significant increase in cell apoptosis through AMPK *** addition,co.pared with the HFD-fed C57BL/6J mice,PLIN 5 knockout mice fed with HFD showed reduced liver fat deposition,decreased LD abundance and size,and reduced liver ***:These findings highlight the unique regulatory role of PLIN 5 in HSCs and the role of PLIN 5 in the fibrosis process of NAFLD.

关键词： AMPK apoptosis hepatic stellate cell liver fibrosis perilipin 5

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70 Gbps PAM-4850-nm oxide-co.fined VCSEL without equalization and pre-emphasis

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Journal of Semico.ductors 2024年第5期45卷 5-7页

作者： Anjin Liu Bao Tang Zhiyong Li Wanhua zheng Key Laboratory of Optoelectronic Materials and Devices Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China accelink technologies co. LtdWuhan 430205China Key Laboratory of Solid-State Optoelectronics Information Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

Directly modulated 850-nm vertical-cavity surface-emitting lasers(VCSELs)with the advantages of low co.t,high modulation speed,good reliability,and low power co.sumption,are the key sources in the optical interco.nects with multimode fibers for the superco.puters,data centers,and machine learning applications[1−3].Typically,non-return-tozero(NRZ)modulation format is used.

关键词： return co.fined fibers

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Improving strength-ductility synchronously of Electron beam welded Ti600/Ti2AlNb joint through isothermal forging

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Progress in Natural Science:Materials International 2024年第3期34卷 532-539页

作者： Yongqiang Zhang Xiangyi Xue Guoming zheng Jingli Zhang Huiming Li Shewei Xin State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi'an qin Ti Intelligent Manufacturing technologies co.Ltd. Northwest Institute for Nonferrous Metal Research Xi'an University of Science and Technology Avic Xi'an Aircraft Industry Group co.pany Ltd.

Different alloys can be flexibly co.bined to meet the performance needs of different parts of the co.pressor disc by welding process. However, achieving a good co.bination of dissimilar alloys with different mechanical properties has always been a research difficulty. In this work, a Ti600/Ti2AlNb joint was fabricated through electron beam welding and an isothermal forging was used to optimized its microstructure and mechanical performance. The isothermal forging process increases the ultimate tensile strength（UST） and yield strength（YS）of the Ti600/Ti2AlNb joint by ～18 %, while ～2.5 times the ductility. It is indicated that before forging, the Ti600/Ti2AlNb joint exhibits a much lower strength than that of Ti600 matrix, whereas the opposite is true after isothermal forging. The isothermal forging broken the co.rse co.umnar grains of Ti600/Ti2AlNb joint and render to an equiaxed B2 structure in which the acicular α2and O phase are precipitated, resulting a synchronous enhancement of strength and ductility. This work may pave an effective routine for improving the co.prehensive mechanical properties of dissimilar metal welding joint.

关键词： Electron beam welding Ti600/Ti2AlNb joint Isothermal forging Mechanical performance

Revealing the role of electrode potential micro-environments in single Mn atoms for carbon dioxide and oxygen electrolysis

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Nano Research 2024年第9期17卷 7957-7966页

作者： Pengcheng Liu anyi Liu Kaili Wang Shuai Shi Mengmeng Jin Jingxiu Liu Tao qin Qian Liu Xijun Liu Jia He Tianjin Key Laboratory of Organic Solar Cells and Photochemical co.version School of Chemistry and Chemical EngineeringInstitute of New-Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China School of Chemistry and Chemical Engineering and Environmental Engineering Weifang UniversityWeifang 261061China Department of Electrical Engineering and Automation Luoyang Institute of Science and TechnologyLuoyang 471023China Institute for Advanced Study Chengdu UniversityChengdu 610106China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for co.posite Structures Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China

Elucidation the relationship between electrode potentials and heterogeneous electrocatalytic reactions has attracted widespread *** we co.struct the well-defined Mn single-atom(MnSA)catalyst with four N-co.rdination through a simple thermal pyrolysis preparation method to investigate the electrode potential micro-environments effect on carbon dioxide reduction reactions(co.(2)RR)and oxygen reduction reactions(ORR).MnSA catalysts generate higher co.production Faradaic efficiency of exceeding 90%at-0.9 V for co.(2)RR and higher H_(2)O_(2)yield from 0.1 to 0.6 V with excellent ORR *** functional theory(DFT)calculations based on co.stant potential models were performed to study the mechanism of MnSA on co.(2)*** thermodynamic energy barrier of co.(2)RR is lowest at-0.9 V *** hydrogen electrode(RHE).Similar DFT calculations on the H_(2)O_(2)yield of ORR showed that the H_(2)O_(2)yield at 0.2 V was *** study provides a reasonable explanation for the role of electrode potential micro-environments.

关键词： electrode potential micro-environments Mn single-atom catalyst carbon dioxide reduction reaction oxygen reduction reaction co.stant potential models

Enco.ing and Deco.ingof co.lector in Fiber Electronic Current Transformer

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Encoding and Decodingof Collector in Fiber Electronic Curren...