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Defects and morphology engineering for constructing V_(5)-Ni_(3)S_(2)@Vs-Cu_(2)S nanotube heterojunction arrays toward efficient bifunctional electrocatalyst for overall water splitting

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Journal of Energy Chemistry 2024年第7期94卷 29-40页

作者： wenyuan sun Alan Meng Lei Wang Guicun Li Jinfeng Cui Yongkai sun Zhenjiang Li College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Key Laboratory of Optic-electric Sensing and Analytical Chemistryfor Life Science MOE College of Chemistry and Molecular EngineeringQingdao Universityof Science and TechnologyQingdao 266042ShandongChina College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Qingdao Huanghai University Qingdao 266000ShandongChina College of Electromechanical Engineering Qingdao University of Science and TechnologyQingdao 266061ShandongChina

The development of highly active,stable and inexpensive electrocatalysts for hydrogen production by defects and morphology engineering remains a great challenge.Herein,S vacancies-rich Ni_(3)S_(2)@Cu_(2)S nan-otube heterojunction arrays were in-situ grown on copper foam(V_(5)-Ni_(3)S_(2)@Vs-Cu_(2)S NHAs/CF)for efficient electrocatalytic overall water splitting.With the merits of nanotube arrays and efficient electronic mod-ulation drived by the OD vacancy defect and 2D heterojunction defect,the resultant V_(5)-Ni_(3)S_(2)@Vs-Cu_(2)S NHAs/CF electrocatalyst exhibits excellent electrocatalytic activity with a low overpotential of 47 mV for the hydrogen evolution reaction(HER)at 10 mA cm^(-2) current density,and 263 mV for the oxygen evolution reaction(OER)at 50 mA cm^(-2) current density,as well as a cell voltage of 1.48 V at 10 mA cm^(-2).Moreover,the nanotube heterojunction arrays endows V_(5)-Ni_(3)S_(2)@Vs-Cu_(2)S NHAs/CF with outstanding stability in long-term catalytic processes,as confirmed by the continuous chronopotentiom-etry tests at current densities of 10 mA cm^(-2) for 100 h.

关键词： Nanotubearrays Heterojunction Vacancy Bifunctional electrocatalyst Overall water splitting

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Gut liver brain axis in diseases:the implications for therapeutic interventions

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Signal Transduction and Targeted Therapy 2024年第1期9卷 79-104页

作者： Mengyao Yan Shuli Man Benyue sun Long Ma Lanping Guo Luqi Huang wenyuan Gao State Key Laboratory of Food Nutrition and Safety Key Laboratory of Industrial MicrobiologyMinistry of EducationTianjin Key Laboratory of Industry MicrobiologyNational and Local United Engineering Lab of Metabolic Control Fermentation TechnologyChina International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal ChemistryCollege of BiotechnologyTianjin University of Science&Technology300457 TianjinChina National Resource Center for Chinese Materia Medica China Academy of Chinese Medical Sciences100700 BeijingChina Tianjin Key Laboratory for Modern Drug Delivery&High-Efficiency School of Pharmaceutical Science and TechnologyTianjin UniversityWeijin Road300072 TianjinChina

Gut-liver-brain axis is a three-way highway of information interaction system among the gastrointestinal tract,liver,and nervous systems.In the past few decades,breakthrough progress has been made in the gut liver brain axis,mainly through understanding its formation mechanism and increasing treatment strategies.In this review,we discuss various complex networks including barrier permeability,gut hormones,gut microbial metabolites,vagus nerve,neurotransmitters,immunity,brain toxic metabolites,β-amyloid(Aβ)metabolism,and epigenetic regulation in the gut-liver-brain axis.Some therapies containing antibiotics,probiotics,prebiotics,synbiotics,fecal microbiota transplantation(FMT),polyphenols,low FODMAP diet and nanotechnology application regulate the gut liver brain axis.Besides,some special treatments targeting gut-liver axis include farnesoid X receptor(FXR)agonists,takeda G protein-coupled receptor 5(TGR5)agonists,glucagon-like peptide-1(GLP-1)receptor antagonists and fibroblast growth factor 19(FGF19)analogs.Targeting gut-brain axis embraces cognitive behavioral therapy(CBT),antidepressants and tryptophan metabolism-related therapies.Targeting liver-brain axis contains epigenetic regulation and Aβmetabolism-related therapies.In the future,a better understanding of gut-liver-brain axis interactions will promote the development of novel preventative strategies and the discovery of precise therapeutic targets in multiple diseases.

关键词： metabolism therapeutic immunity

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Germylene-Fe complexes caused by heterometallic coupling and investigation into the 3d-4p bonding

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Chinese Chemical Letters 2024年第3期35卷 304-307页

作者： Yingying Qin Yongmei Kang Lei Zhang Jianping sun Zhijing Zhang Jialei Xu Fanlong Zeng Anyang Li wenyuan Wang Weiqun Shi Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education College of Chemistry and Materials ScienceNorthwest UniversityXi'an 710127China Laboratory of Nuclear Energy Chemistry Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Shaanxi Coal and Chemical Industry Xi'an 710054China

The interpretation of heterometallic bonding nature is a basic work of inorganic chemistry.By means of intermetallic substitution of germylene anions with iron halide complexes CpFe(CO)_(2)I andβ-diketiminato Fe^Ⅱchloride,the ferrogermylene complexes 3a,3b and 4a were synthesized and structurally characterized.The structural and IR characterizations show the presence of the Ge←Feπbackbonding in molecules 3a,3b and 4a.The computational works on frontier molecular orbitals and their comparison of energy states confirmed thatσdonation andπbackbonding are both weak in these molecules,despite three complexes have longer Ge-Fe bonds,whose strength decreases slightly with the degressive electron density around Fe environment in a sequence from 3a,3b to 4a.

关键词： Metallic bonding Germylene Iron Crystal structure σbond πbackbond

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Surface reconstruction,doping and vacancy engineering to improve the overall water splitting of CoP nanoarrays

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Nano Research 2023年第1期16卷 228-238页

作者： Yongkai sun wenyuan sun Lihong Chen Alan Meng Guicun Li Lei Wang Jianfeng Huang Aili Song Zhenhui Zhang Zhenjiang Li College of Electromechanical Engineering Qingdao University of Science and TechnologyQingdao 266061China College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOE College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China School of Material Science and Engineering International S&T Cooperation Foundation of Shaanxi ProvinceXi’an Key Laboratory of Green Manufacture of Ceramic MaterialsShaanxi University of Science and TechnologyXi’an 710021China Qingdao Huanghai University Qingdao 266000China

Development of a general regulatory strategy for efficient overall water splitting remains a challenging task.Herein,a simple,costfairness,and general fluorination strategy is developed to realize surface reconstruction,heteroatom doping,and vacancies engineering over cobalt phosphide(CoP)for acquiring high-performance bifunctional electrocatalysts.Specifically,the surface of CoP nanoarrays(NAs)becomes rougher,meanwhile F doped into CoP lattice and creating amounts of P vacancies by fluorination,which caused the increase of active sites and regulation of charge distribution,resulting the excellent electrocatalyst performance of F-CoP NAs/copper foam(CF).The optimized F-CoP NAs/CF delivers a lower overpotential of only 35 mV at 10 mA·cm^(−2)for hydrogen evolution reaction(HER)and 231 mV at 50 mA·cm^(−2)for oxygen evolution reaction(OER),and the corresponding overall water splitting requires only 1.48 V cell voltage at 10 mA·cm^(−2),which are superior to the most state-of-theart reported electrocatalysts.This work provides an innovative and feasible strategy to construct efficient electrocatalysts.

关键词： fluorination surface reconstruction F atom doping P vacancies overall water splitting

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An Asymmetric Galactic Stellar Disk Traced by OB-type Stars from LAMOST DR7

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Research in Astronomy and Astrophysics 2024年第6期24卷 40-53页

作者： Xiaopeng Liu Hao Tian wenyuan Cui Linlin Li Jiaming Liu Zhenyan Huo Yawei Gao Department of Physics Hebei Normal University Guo Shoujing Institute for Astronomy Hebei Normal University Key Laboratory of Space Astronomy and Technology National Astronomical Observatories Chinese Academy of Sciences Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University

Using 9943 OB-type stars from LAMOST DR7 in the solar neighborhood,we fit the vertical stellar density profile with the model including a single exponential distribution at different positions （R,Φ）.The distributions of the scale heights and scale length show that the young disk traced by the OB-type stars is not axisymmetric.The scale length decreases versus the azimuthal angle Φ,i.e.,from.■kpc withΦ=-3°to■kpc withΦ=9°.Meanwhile we find signal of non-symmetry in the distribution of the scale height of the north and south of the disk plane.The scale height in the north side shows signal of flaring of the disk,while that of the south disk stays almost constant around hs=130 pc.The distribution of the displaceeent of the disk plane Z0also shows variance versus the azimuthal angleΦ,which displays significant differences with the warp model constrained by the Cepheid stars.We also test different values for the position of the sun,and the distance between the sun and the Galactic center affects the scale heights and the displacement of the disk significantly,but that does not change our conclusion that the disk is not axisymmetric.

关键词： galaxies: spiral Galaxy: disk stars: early-type stars: massive

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复合制度主义:基于中阿合作论坛的实证研究

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西亚非洲 2024年第1期 25-49,153页

作者：孙德刚马文媛复旦大学中东研究中心复旦大学国际问题研究院复旦大学国际关系与公共事务学院

“复合制度主义”基于历史制度主义、理性选择制度主义和社会建构制度主义,通过制度叠加消除合作中的制度赤字,降低交易成本,发挥多重制度的集成优势,形成差序化的核心机制、重点机制、延伸机制与辐射机制。21世纪以来,中国与阿拉伯国... 详细信息

“复合制度主义”基于历史制度主义、理性选择制度主义和社会建构制度主义,通过制度叠加消除合作中的制度赤字,降低交易成本,发挥多重制度的集成优势,形成差序化的核心机制、重点机制、延伸机制与辐射机制。21世纪以来,中国与阿拉伯国家关系从双边务实合作走向多边制度化建设,中阿合作论坛应运而生。在“复合制度主义”理念指引下,中阿双方坚持平等互利、讲求实效、形式多样、共同发展的原则,合作制度不断完善,促进了合作关系从新型伙伴、战略合作、战略伙伴迈向命运共同体的新阶段。展望未来,中阿合作论坛制度化建设对内需加强统筹协调,避免因各类机制相互稀释而造成的低效重复;对外需应对大国制度竞争的影响,防止因同质化多边制度供大于求而产生制度过剩。中阿双方应在政治、经贸、人文、科技和安全五大领域多管齐下,激发中阿合作论坛各类机制的活力,形成“复合制度主义”的系统效应,服务于新时代中阿整体合作。

关键词：中阿合作论坛地区主义中阿关系复合制度主义制度堆叠

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巴以冲突的治理难题与前景分析

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和平与发展 2024年第1期 132-154,207,208页

作者：孙德刚马文媛复旦大学中东研究中心复旦大学国际问题研究院复旦大学国际关系与公共事务学院

巴以问题是中东地区安全及国际关系的核心问题。2023年10月,巴以冲突再度爆发并产生溢出效应,形成了四组矛盾:一是哈马斯等“抵抗联盟”成员与以色列的军事博弈,二是阿拉伯、伊斯兰国家以及“全球南方”左翼政府与以色列的政治博弈,三... 详细信息

巴以问题是中东地区安全及国际关系的核心问题。2023年10月,巴以冲突再度爆发并产生溢出效应,形成了四组矛盾:一是哈马斯等“抵抗联盟”成员与以色列的军事博弈,二是阿拉伯、伊斯兰国家以及“全球南方”左翼政府与以色列的政治博弈,三是国际社会与美以的外交博弈,四是全球亲巴力量与亲以势力的舆论博弈。围绕巴以问题的解决出路,国际社会提出了反恐怖主义论、反殖民主义论和共生关系论三种不同的治理路径,各种治理方案相互竞争,对巴以和平、中东国际关系和大国的中东战略产生了深远影响。中国站在推动构建人类命运共同体的高度,积极践行全球安全倡议,主张在“两国方案”和联合国相关决议的基础上实现阿以两大民族和平共处,为巴以冲突治理贡献安全和智力公共产品,与国际社会一道助力中东和平与发展事业。

关键词：巴以冲突安全治理大国协调中东政治中国中东外交

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Mixed oligopoly, foreign penetration and China's environmental policy: a research based on mixed oligopoly model

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Chinese Journal of Population,Resources and Environment 2017年第3期15卷 249-254页

作者： Qin Yang wenyuan sun Hongjin Xiang Economy and Trade School Nanjing Audit University

This paper analyzes how the foreign penetration affects China's environment policy in a mixed oligopoly framework, and gets several interesting conclusions. First, our result shows that government should strengthen the degree of environmental policy along with increasing proportion of domestic ownership of multinational firms. Second, we show that an increase in domestic ownership of multinational firms raises not only domestic private firms' profit but also public firm's profit as well as social welfare. Third, the government will raise the environmental tax to control environmental damage.

关键词：环境政策制造商控制模型市场混合中国外国控制框架

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储能参与容量市场的国内外现状及机制思考

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电力系统自动化 2024年第6期48卷 226-239页

作者：丁涛孙嘉玮黄雨涵穆程刚黄文渊耿思敏西安交通大学电气工程学院陕西省西安市710049 中国电力科学研究院有限公司(南京) 江苏省南京市210003

在现行电力市场机制下,储能资源的容量价值和物理特性往往难以体现,且长期获利不足。在构建新型电力系统的背景下,激励储能资源参与容量市场有利于发挥储能资源的容量价值并保障电力系统长期可靠运行。因此,文中对国内外储能参与容量市... 详细信息

在现行电力市场机制下,储能资源的容量价值和物理特性往往难以体现,且长期获利不足。在构建新型电力系统的背景下,激励储能资源参与容量市场有利于发挥储能资源的容量价值并保障电力系统长期可靠运行。因此,文中对国内外储能参与容量市场的研究和实践进行了调研分析,总结了储能资源参与典型容量机制的现状。在此基础上,结合中国电力市场发展及容量机制建设现状,探讨了储能参与中国容量市场可能面临的风险与挑战,并从市场准入、技术标准、产品设计、交易机制等方面提出了相关思考。

关键词：储能容量市场容量机制容量价值交易机制

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超临界二氧化碳螺旋槽干气密封热流耦合润滑临界阻塞特性研究

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化工学报 2024年第2期75卷 604-615页

作者：朱芝许恒杰陈维毛文元邓强国孙雪剑昆明理工大学化学工程学院云南昆明650500 昆明理工大学机电工程学院云南昆明650500

在密封稳定运行的前提下,促成密封端面出口形成阻塞流动以提升气膜开启力、降低端面泄漏不失为干气密封性能优化的有效途径。以超临界二氧化碳(CO_(2))螺旋槽干气密封为研究对象,综合考虑实际气体、离心惯性、湍流和阻塞流效应,采用有... 详细信息

在密封稳定运行的前提下,促成密封端面出口形成阻塞流动以提升气膜开启力、降低端面泄漏不失为干气密封性能优化的有效途径。以超临界二氧化碳(CO_(2))螺旋槽干气密封为研究对象,综合考虑实际气体、离心惯性、湍流和阻塞流效应,采用有限差分法耦合求解压力和温度控制方程,定性研究了热流耦合润滑下的临界阻塞特性(临界阻塞进口压力po_(cir)、临界阻塞转速N_cir、临界阻塞膜厚h0_cir和阻塞临界失稳膜厚hsc)。结果表明:等温流动和绝热流动模型下超临界CO_(2)干气密封端面间隙出口均存在阻塞发生工况区间,进口压力、膜厚、转速对应的阻塞发生区间分别为po>po_(cir)、h0_cir

关键词：超临界二氧化碳干气密封热流耦合临界阻塞特性阻塞发生区间

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