检索结果-南通市图书馆

Tensile Strain and Interatomic Orbital Hybridization Effects boost the Electrocatalytic Performance of Intermetallic Pd3Pb Nanowires for Ethanol Electrooxidation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2024年第21期42卷 2633-2640页

作者： bo-qiang miao Zi-Han Yuan Xi-Lai Liu Xuan Ai Guang-Tao Zhao Pei Chen Pu-Jun Jin Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'anShaanxi710062 China

We present a strategy that effectively modulate the d-band electronic structure of the active center by strain effect and interatomic orbital *** strategy efficiently promotes the kinetic process of the ethanol oxidation reaction(EOR)in alkaline *** the intermetallic Pd_(3)Pb nanowires,the introduction of Pb not only causes the lattice expansion of Pd but also achieves the interatomic orbital hybridization bonding with *** interatomic orbital hybridization effect and tensile strain effect can effectively achieve a co-regulation of the d-band electronic structure of Pd,which directly affects the adsorption behavior of intermediate on Pd for ***,the intermetallic Pd_(3)Pb nanowires demonstrate enhanced EOR activity and anti-poisoning ability against CO_(ads).Theoretical calculations show that the enhanced OH^(*)adsorption ability and the low energy barrier for the oxidative dehydrogenation of ethanol are the keys to high EOR activity and stability of the intermetallic Pd_(3)Pb nanowires.

关键词： Intermetallic structure Orbital hybridization d-band structure Ethanol oxidation Synergistic effect

The d-p orbital hybridization engineered RhPb bimetallene for efficient ethanol electrooxidation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2024年

作者： bo-qiang miao Zi-Han Yuan Qing-Ling Hong Xuan Ai Fu-Min Li Pei Chen Pu-Jun Jin Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Shaanxi Key Laboratory for Advanced Energy Devices School of Materials Science and Engineering Shaanxi Normal University MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of Physics Xi'an Jiaotong University

The construction of bimetallic sites with strong interaction can effectively regulate the electronic structure and modulate the adsorption behavior of adsorbate species on bimetallic catalysts,thereby overcoming catalytic ***,an RhPb bimetallene (RhPb b-ML) with the strong d-p orbital hybridization is proposed for efficiently catalyzing ethanol oxidation reaction (EOR).Notably,the specific EOR activity of RhPb b-ML is 32 and 6.8 times higher than those of Rh metallene and commercial Pt/C,*** calculation analysis reveals that the introduction of Pb atoms into the Rh lattice leads to an upward shift of the d-band center of Rh on RhPb(111).The shift in the d-band center is primarily attributed to the different degrees of hybridization between the d sub-orbitals of Rh and the p-orbitals of Pb,which enhance the adsorption of key species and improve EOR activity and ***-situ infrared tests and high-performance liquid chromatography tests together confirm that RhPb b-ML not only exhibits enhanced ability for the breakage of C–C bonds but also effectively suppresses the generation of absorbed ***,the strategy of enhancing catalyst performance through the strong d-p orbital hybridization has been demonstrated to be scalable to other bimetallic catalysts,providing valuable insights for the design of advanced catalysts.

关键词：

Direct growth of holey Fe3O4-coupled Ni(OH)2 sheets on nickel foam for the oxygen evolution reaction

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 2021年第2期42卷 271-278页

作者： Yu Ding bo-qiang miao Yue Zhao Fu-Min Li Yu-Cheng Jiang Shu-Ni Li Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710062ShaanxiChina School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710062ShaanxiChina

The oxygen evolution reaction(OER)is a half-reaction of water electrolysis,and the OER performance of an electrocatalyst is significantly related to its energy conversion *** to their high OER activity,transition metal-based nanomaterials have become potential low-cost substitutes for Ir/Ru-based OER electrocatalysts in an alkaline ***,holey Fe3O4-coupled Ni(OH)2 sheets(Ni(OH)2-Fe H-STs)were easily achieved by a simple mixed-cyanogel hydrolysis *** two-dimensional(2D)Ni(OH)2-Fe H-STs with ca.1 nm thickness have a high specific surface area,abundant unsaturated coordination atoms,and numerous pores,which are highly favorable for electrocatalytic ***,the introduction of Fe improves the conductivity and regulates the electronic structure of *** to their special structural features and synergistic effect between the Fe and Ni atoms,Ni(OH)2-Fe H-STs with an optimal Ni/Fe ratio show excellent OER activity in a 1 M KOH solution,which significantly exceeds that of the commercial RuO2 nanoparticle ***,Ni(OH)2-Fe H-STs can be grown on nickel foam(NF),and the resulting material exhibits enhanced OER activity,such as a small overpotential of 200 mV and a small Tafel slope of 56 mV dec−1,than that of Ni(OH)2-Fe H-STs without NF.

关键词： Oxygen evolution reaction Transition metal-based nanomaterials Holey two-dimensional materials Heteroatom doping Electrocatalysis

Platinum-Tellurium Alloy Metallene Toward Formic Acid Oxidation Reaction

在线全文

学校读者我要写书评

暂无评论

Renewables 2023年第1期1卷 90-99页

作者： Ya-Nan Li Qing-Ling Hong bo-qiang miao Tian-Jiao Wang Yu Ding Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province School of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710062

Engineering the composition and/or morphology of noble metal nanocrystals is a highly effective strategy for enhancing their electrocatalytic ***,metallenes with specific chemical and physical properties have increasingly attracted attention in the field of *** this work,two-dimensional ultrathin platinum-tellurium alloy metallene(PtTe A-ML)is synthesized using a conventional liquid-phase chemical reduction *** high atomic utilization as well as alloy effect endow PtTe A-ML with preeminent electrocatalytic activity for the formic acid oxidation reaction(FAOR).Specifically,the direct oxidation pathway of FAOR can be completely achieved using PtTe A-ML,which suppresses the production of toxic carbon monoxide(CO)intermediates and improves the reaction kinetics of ***,the FAOR activity of PtTe AML in acidic media is 43 and 5.6 times higher than that of commercial Pt and Pd nanocrystals,***,PtTe A-ML also exhibits excellent electrocatalytic activity for the CO oxidation reaction because of the introduction of oxygenophilic Te atoms and electron transfer between Pt and Te,which elevates the durability of PtTe A-ML for *** study provides a simple synthesis strategy for PtTe A-ML and demonstrates that PtTe A-ML has a promising practical prospect for direct formic acid fuel cells.

关键词： metallene PtTe alloy electrocatalysis formic acid electrooxidation fuel cells

Gamma-glutamyl transferase 5 overexpression in cerebrovascular endothelial cells improves brain pathology,cognition,and behavior in APP/PS1 mice

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第2期20卷 533-547页

作者： Yanli Zhang Tian Li Jie miao Zhina Zhang Mingxuan Yang Zhuoran Wang bo Yang Jiawei Zhang Haiting Li qiang Su Junhong Guo Department of Neurology First Hospital of Shanxi Medical UniversityTaiyuanShanxi ProvinceChina Department of Neurology Sixth Hospital of Shanxi Medical University(General Hospital of Tisco)TaiyuanShanxi ProvinceChina Department of Physiology Key Laboratory of Cellular PhysiologyMinistry of EducationShanxi Medical UniversityTaiyuanShanxi ProvinceChina Department of Hernia and Abdominal Wall Surgery Shanxi Bethune HospitalShanxi Academy of Medical SciencesTongji Shanxi HospitalThird Hospital of Shanxi Medical UniversityTaiyuanShanxi ProvinceChina Department of Laboratory Medicine of Fenyang College Shanxi Medical UniversityFenyangShanxi ProvinceChina

In patients with Alzheimer’s disease,gamma-glutamyl transferase 5(GGT5)expression has been observed to be downregulated in cerebrovascular endothelial ***,the functional role of GGT5 in the development of Alzheimer’s disease remains *** study aimed to explore the effect of GGT5 on cognitive function and brain pathology in an APP/PS1 mouse model of Alzheimer’s disease,as well as the underlying *** observed a significant reduction in GGT5 expression in two in vitro models of Alzheimer’s disease(Aβ_(1-42)-treated hCMEC/D3 and bEnd.3 cells),as well as in the APP/PS1 mouse ***,injection of APP/PS1 mice with an adeno-associated virus encoding GGT5 enhanced hippocampal synaptic plasticity and mitigated cognitive ***,increasing GGT5 expression in cerebrovascular endothelial cells reduced levels of both soluble and insoluble amyloid-βin the brains of APP/PS1 *** effect may be attributable to inhibition of the expression ofβ-site APP cleaving enzyme 1,which is mediated by nuclear factor-kappa *** findings demonstrate that GGT5 expression in cerebrovascular endothelial cells is inversely associated with Alzheimer’s disease pathogenesis,and that GGT5 upregulation mitigates cognitive deficits in APP/PS1 *** findings suggest that GGT5 expression in cerebrovascular endothelial cells is a potential therapeutic target and biomarker for Alzheimer’s disease.

关键词： Alzheimer’s disease amyloid-β APP/PS1 mice cerebrovascular endothelial cells cognitive deficits gamma-glutamyl transferase 5 neurovascular unit nuclear factor‐kappa B synaptic plasticity β-site APP cleaving enzyme 1

在线全文

学校读者我要写书评

暂无评论

结构线性屈曲分析算法研究及工程应用

建筑结构 2017年第18期47卷 105-109页

作者：武云鹏韩博曾强苗启松北京市建筑设计研究院有限公司北京100045

建筑结构线性屈曲分析是一类典型的广义特征值问题,可用于评估结构的稳定安全度,并可从屈曲模态判断结构的薄弱环节,用于优化结构布置;另外,屈曲分析也可用于构件长度系数的分析,其结果可直接用于钢构件的设计与验算,因此屈曲分析在结... 详细信息

建筑结构线性屈曲分析是一类典型的广义特征值问题,可用于评估结构的稳定安全度,并可从屈曲模态判断结构的薄弱环节,用于优化结构布置;另外,屈曲分析也可用于构件长度系数的分析,其结果可直接用于钢构件的设计与验算,因此屈曲分析在结构设计中具有广泛的实际意义。在具体计算中,由于几何刚度不具备正定性,屈曲分析与振型计算存在显著差异,甚至经常出现正负屈曲因子共存的情况,其收敛性弱于一般振型分析,采用传统算法有时会显著变慢甚至出现计算困难,而采用与屈曲荷载相关的Ritz向量法,则可显著改善收敛速度和求解精度。算例表明,该算法可快速计算任意指定荷载下的大量屈曲模态,对于负屈曲因子的情况具有良好的适应能力。目前,该方法已集成到北京市建筑设计研究院有限公司自主研发的结构设计软件Paco中,取得了良好的应用效果。

关键词：屈曲分析几何刚度 Ritz向量法

Human-induced pluripotent stem cell-derived neural stem cell exosomes improve blood-brain barrier function after intracerebral hemorrhage by activating astrocytes via PI3K/AKT/MCP-1 axis

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第2期20卷 518-532页

作者： Conglin Wang Fangyuan Cheng Zhaoli Han bo Yan Pan Liao Zhenyu Yin Xintong Ge Dai Li Rongrong Zhong qiang Liu Fanglian Chen Ping Lei Department of Geriatrics Tianjin Medical University General HospitalTianjinChina School of Medicine Nankai UniversityTianjinChina Tianjin Neurological Institute TianjinChina

Cerebral edema caused by blood-brain barrier injury after intracerebral hemorrhage is an important factor leading to poor ***-induced pluripotent stem cell-derived neural stem cell exosomes(hiPSC-NSC-Exos)have shown potential for brain injury repair in central nervous system *** this study,we explored the impact of hiPSC-NSC-Exos on blood-brain barrier preservation and the underlying *** results indicated that intranasal delivery of hiPSC-NSC-Exos mitigated neurological deficits,enhanced blood-brain barrier integrity,and reduced leukocyte infiltration in a mouse model of intracerebral ***,hiPSC-NSC-Exos decreased immune cell infiltration,activated astrocytes,and decreased the secretion of inflammatory cytokines like monocyte chemoattractant protein-1,macrophage inflammatory protein-1α,and tumor necrosis factor-αpost-intracerebral hemorrhage,thereby improving the inflammatory *** sequencing indicated that hiPSC-NSC-Exo activated the PI3K/AKT signaling pathway in astrocytes and decreased monocyte chemoattractant protein-1 secretion,thereby improving blood-brain barrier *** with the PI3K/AKT inhibitor LY294002 or the monocyte chemoattractant protein-1 neutralizing agent C1142 abolished these *** summary,our findings suggest that hiPSC-NSC-Exos maintains blood-brain barrier integrity,in part by downregulating monocyte chemoattractant protein-1 secretion through activation of the PI3K/AKT signaling pathway in astrocytes.

关键词： AKT astrocyte blood-brain barrier cerebral edema exosomes human-induced pluripotent stem cells intracerebral hemorrhage neural stem cells neuroinflammation PI3K

Laser direct writing of flexible multifunctional airflow sensors on the Kevlar fabric

在线全文

学校读者我要写书评

暂无评论

Nano Research 2025年第1期18卷 443-454页

作者： Wei Wang Zi-Qing Chen Yong-Qi Li Yu-Long Wang Mei-Chen Liu Yun-bo Ruan Yang Zhang Shu-Juan Liu qiang Zhao College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China State Key Laboratory of Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China Zhe Jiang Topsun Logistic Control CO. LTD.Yuhuan 317600China Department of Rehabilitation Medicine School of Acupuncture-Moxibustion and Tuina and School of Health Preservation and RehabilitationNanjing University of Chinese MedicineNanjing 210023China

The growing interest in flexible devices has emerged as a global trend due to their advantages in flexibility,lightweight structure,and wearability,addressing the limitations of traditional *** wearable airflow sensors have been previously reported,the development of flexible fabric-based airflow sensors capable of functioning in environments with open flames—critical for fire rescue operations—has yet to be explored,largely due to the poor fire resistance of conventional *** this work,we first present a flexible,wearable,and multifunctional airflow sensor with excellent fire-resistant properties,fabricated through a simple direct laser writing *** sensor maintains airflow detection capabilities even in the presence of open ***,the fabrication of fabric-based sensors involves complex procedures such as carbon materials doping or vapor-phase deposition,leading to lengthy preparation cycles and high ***,fabric-based devices are inherently prone to *** address these challenges,we introduce twice-vertical laser-induced graphene(TVLIG)as a sensitive and reliable component for fire-resistant airflow *** resulting TVLIG/Kevlar fabric can be integrated into various garments,particularly protective suits,to form sensitive and fire-resistant airflow sensors capable of detecting airflow velocity and direction in both two-dimensional(2D)and three-dimensional(3D)spaces during fire ***,the TVLIG patterns can be expanded to multifunctional platforms,such as glucose detection for injured individuals,offering further applications in rescue *** functional expansion reduces the burden on rescue personnel and streamlines device *** its outstanding sensing capabilities,fire resistance,and expandability,the developed flexible airflow sensor shows great potential for various real-world rescue scenarios,promising advancements in wearable sensing technology for rescue enginee

关键词： flexible airflow sensor direct laser writing twice-vertical laser-induced graphene fire accident rescue Kevlar fabric

Multi-Objective Optimal Design of the Wind-Wave Hybrid Platform with the Coupling Interaction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2023年第5期22卷 1165-1180页

作者： DENG Ziwei ZHANG Baocheng miao Yu ZHAO bo WANG qiang ZHANG Kaisheng Department of Mechatronic Engineering College of EngineeringOcean University of ChinaQingdao 266100China Key Laboratory of Ocean Engineering of Shandong Province Ocean University of ChinaQingdao 266100China

An offshore wind-wave hybrid platform could consistently and cost-effectively supply renewable power.A multi-objective optimization process is proposed for a hybrid platform with hydrodynamic coupling *** effects of various critical structural parameters,spacing values,and wave directions are studied for higher energy capture and offshore platform *** models of various key parameters are established to optimize the hybrid system,with the objects of the power capture width ratio and the stability index of the *** optimization results are affected by the hydrodynamic coupling interaction,with a tendency to affect the higher frequency of hydrodynamic performance in the hybrid *** the optimization,an appropriate spacing value effectively improves energy capture *** optimal array distance D_(Ff),D_(Fp),the optimal structural parameters R_(p),r_(p),d_(f),r_(f),and B_(PTO)are 11.57,12.75,5.1,3.3,1.5,6.5 m,and 80436 Nm s^(-1),*** peak value of the wave energy converter capture width ratio in the hybrid system increases by almost 50%,with a 54%decrease in the stability index.

关键词： wind and wave energy hydrodynamic interaction optimization