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Integrating single Ni site and PtNi alloy on two-dimensional porous carbon nanosheet for efficient catalysis in fuel cell

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Nano Research 2024年第8期17卷 6916-6921页

作者： Fangyao zhou Yaner Ruan Feng Li Lin Tian Mengzhao Zhu Wenan Tie Xiaoyan Tian Bo Wang Peigen Liu Jie Xu Xiaoping Gao Peng Li huang zhou Yuen Wu Key Laboratory of Precision and Intelligent Chemistry University of Science and Technology of ChinaHefei 230026China Shanxi Yanchang Petroleum(Group)Co.Ltd. Xian 710065China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325035China

The performance of catalyst depends on the intrinsic activity of active sites and the structural characteristics of the ***,we simultaneously integrate single nickel(Ni)sites and platinum-nickel(PtNi)alloy nanoparticles(NPs)on a two-dimensional(2D)porous carbon nanosheet,demonstrating remarkable catalytic performance in the oxygen reduction reaction(ORR).The single Ni sites can activate the oxygen molecules into key oxygen-containing intermediate that is further efficiently transferred to the adjacent PtNi alloy NPs and rapidly reduced to H_(2)O,which establishes a relay catalysis between active *** porous structure on the carbon nanosheet support promotes the transfer of active intermediates between these active sites,which assists the relay catalysis by improving mass ***,the obtained catalyst demonstrates a half-wave potential of up to 0.942 V,a high mass activity of 0.54 A·mgPt^(−1),and negligible decay of activity after 30,000 cycles,which are all superior to the commercial Pt/C catalysts with comparable loading of *** theoretical calculation results reveal that the obtained catalyst with defect structure of carbon support presents enhanced relay catalytic effect of PtNi alloy NPs and single Ni sites,ultimately realizing improved catalytic *** work provides valuable inspiration for developing low platinum loading catalyst,integrating single atoms and alloy with outstanding performance in fuel cell.

关键词： two-dimensional porous carbon nanosheet Pt-based alloy single atom catalysts relay effect proton-exchange membrane fuel cells

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《齐物论》的异样佛解——以《庄子内篇注·齐物论》与《齐物论释》为例

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北京社会科学 2024年第6期 53-63页

作者：周黄琴广东石油化工学院

近人较多地从知识论角度来解析《齐物论》,从而易得出相对主义的否弃论。然晚明憨山德清与近代章太炎虽皆以佛解《齐物论》,但在异样的时代需求与教育观念下,他们不仅在文本主旨上存在着“齐‘物论’”与“‘齐物’论”的异样判定,而且... 详细信息

近人较多地从知识论角度来解析《齐物论》,从而易得出相对主义的否弃论。然晚明憨山德清与近代章太炎虽皆以佛解《齐物论》,但在异样的时代需求与教育观念下,他们不仅在文本主旨上存在着“齐‘物论’”与“‘齐物’论”的异样判定,而且在佛学的解读基点上亦存在着南宗迷悟与唯识思想的异样性。在运用“立于心旨与工夫”、训诂与唯识名相解析诸法的异样诠释方法的基础上,他们通过禅老思想与华严、般若以及西学的异样融汇解读,彰显出“世人迷真执妄”与“心之主动”的观念,建构出破执而归真宰与“不齐而齐”的异样图景。无疑,这无不与二人背后所深蕴的化解庄佛矛盾、解庄传佛、振兴佛教与用国粹激动种性,以及佛庄联手的最大化救世功能之异样解读意图有着密不可分的关系。

关键词：齐物论憨山德清章太炎迷悟唯识

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二级柔性减振系统设计及力学性能分析

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振动．测试与诊断 2024年第3期44卷 494-501,618页

作者：石先杰郭卓涛黄舟周春辉任志英中国工程物理研究院总体工程研究所绵阳621999 福州大学机械工程及自动化学院福州350116

为解决二级减振引起个别仪器振动的局部放大、使得力学环境不能满足运行要求的问题,首先,针对金属橡胶双层减振系统,充分考虑安装板的柔性刚度,建立了刚柔复合的二级减振系统模型;其次,基于目标频率对二级减振的频率响应函数进行系统的... 详细信息

为解决二级减振引起个别仪器振动的局部放大、使得力学环境不能满足运行要求的问题,首先,针对金属橡胶双层减振系统,充分考虑安装板的柔性刚度,建立了刚柔复合的二级减振系统模型;其次,基于目标频率对二级减振的频率响应函数进行系统的刚度解耦,实现了减振器刚度的求解,并应用有限元进行随机振动分析,验证了刚柔复合二级减振系统理论模型的可行性;最后,利用振动台进行了试验验证。结果表明,当二级减振系统满足工程刚度需求,其一阶固有频率低于40 Hz时,减振效率可达到70%以上,试验与仿真结果基本一致。

关键词：二级柔性减振金属橡胶减振器随机振动固有频率减振效率

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Senktide blocks aberrant RTN3 interactome to retard memory decline and tau pathology in social isolated Alzheimer’s disease mice

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Protein & Cell 2024年第4期15卷 261-284页

作者： He-zhou huang Wen-Qing Ai Na Wei Ling-Shuang Zhu Zhi-Qiang Liu Chao-Wen zhou Man-Fei Deng Wen-Tao Zhang Jia-Chen Zhang Chun-Qing Yang Ya-Zhuo Hu Zhi-Tao Han Hong-Hong Zhang Jian-Jun Jia Jing Wang Fang-Fang Liu Ke Li Qi Xu Mei Yuan Hengye Man Ziyuan Guo Youming Lu Kai Shu Ling-Qiang Zhu Dan Liu Department of Pathophysiology School of Basic MedicineTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Medical Genetics School of Basic MedicineTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Pathology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450002China Department of Pathology School of Basic MedicineZhengzhou UniversityZhengzhou 450002China The Second Affiliated Hospital Department of NeurologyHengyang Medical SchoolUniversity of South ChinaHengyang 421001China Beijing Key Laboratory of Aging and Geriatrics National Clinical Research Center for Geriatric DiseaseInstitute of GeriatricsChinese PLA General Hospital and Chinese PLA Medical AcademyBeijing 100853China Department of Neurosurgery Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Neurology Union HospitalHuazhong University of Science and TechnologyWuhan 430022China Department of Biology Boston UniversityBostonMA 02215USA Center for Stem Cell and Organoid Medicine(CuSTOM) Division of Developmental BiologyCincinnati Children’s Hospital Medical CenterCincinnatiOH 45229USA

Sporadic or late-onset Alzheimer’s disease(LOAD)accounts for more than 95%of Alzheimer’s disease(AD)cases without any family *** genome-wide association studies have identified associated risk genes and loci for LOAD,numerous studies suggest that many adverse environmental factors,such as social isolation,are associated with an increased risk of ***,the underlying mechanisms of social isolation in AD progression remain *** the current study,we found that 7 days of social isolation could trigger pattern separation impairments and presynaptic abnormalities of the mossy fibre-CA3 circuit in AD *** also revealed that social isolation disrupted histone acetylation and resulted in the downregulation of 2 dentate gyrus(DG)-enriched miRNAs,which simultaneously target reticulon 3(RTN3),an endoplasmic reticulum protein that aggregates in presynaptic regions to disturb the formation of functional mossy fibre boutons(MFBs)by recruiting multiple mitochondrial and vesicle-related ***,the aggregation of RTN3 also recruits the PP2A B subunits to suppress PP2A activity and induce tau hyperphosphorylation,which,in turn,further elevates RTN3 and forms a vicious ***,using an artificial intelligence-assisted molecular docking approach,we determined that senktide,a selective agonist of neurokinin3 receptors(NK3R),could reduce the binding of RTN3 with its ***,application of senktide in vivo effectively restored DG circuit disorders in socially isolated AD *** together,our findings not only demonstrate the epigenetic regulatory mechanism underlying mossy fibre synaptic disorders orchestrated by social isolation and tau pathology but also reveal a novel potential therapeutic strategy for AD.

关键词： Alzheimer’s disease memory impairment synaptic disorder tau pathology

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地理大数据揭示中国主要城市建成环境物质存量的空间格局

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Engineering 2024年第3期34卷 143-153页

作者： zhou huang Yi Bao Ruichang Mao Han Wang Ganmin Yin Lin Wan Houji Qi Qiaoxuan Li Hongzhao Tang Qiance Liu Linna Li Bailang Yu Qinghua Guo Yu Liu Huadong Guo Gang Liu Institute of Remote Sensing and Geographical Information Systems School of Earth and Space SciencesPeking UniversityBeijing 100871China International Research Center of Big Data for Sustainable Development Goals Beijing 100094China SDU Life Cycle Engineering Department of Green TechnologyUniversity of Southern DenmarkOdense 5230Denmark Department of Construction Management School of Civil EngineeringTsinghua UniversityBeijing 100084China School of Computer Science China University of GeosciencesWuhan 430074China School of Geographical Sciences East China Normal UniversityShanghai 200062China Land Satellite Remote Sensing Application Center Ministry of Natural ResourcesBeijing 100048China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Department of Geography California State UniversityLong BeachCA 90840USA Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094China College of Urban and Environmental Sciences Peking UniversityBeijing 100871China

The patterns of material accumulation in buildings and infrastructure accompanied by rapid urbanization offer an important,yet hitherto largely missing stock perspective for facilitating urban system engineering and informing urban resources,waste,and climate ***,our existing knowledge on the patterns of built environment stocks across and particularly within cities is limited,largely owing to the lack of sufficient high spatial resolution *** study leveraged multi-source big geodata,machine learning,and bottom-up stock accounting to characterize the built environment stocks of 50 cities in China at 500 m fine-grained *** per capita built environment stock of many cities(261 tonnes per capita on average)is close to that in western cities,despite considerable disparities across cities owing to their varying socioeconomic,geomorphology,and urban form *** is mainly owing to the construction boom and the building and infrastructure-driven economy of China in the past ***’s urban expansion tends to be more“vertical”(with high-rise buildings)than“horizontal”(with expanded road networks).It trades skylines for space,and reflects a concentration-dispersion-concentration pathway for spatialized built environment stocks development within cities in *** results shed light on future urbanization in developing cities,inform spatial planning,and support circular and low-carbon transitions in cities.

关键词： Urban system engineering Built environment stock Spatial pattern Urban sustainability Big geodata

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硫掺杂Na_(3)(VOPO_(4))_(2)F正极材料的制备及储钠性能

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无机盐工业 2024年第2期56卷 30-37页

作者：周煌胡晓萍任稳曹鑫鑫中南大学材料科学与工程学院湖南长沙410083

聚阴离子型Na_(3)(VOPO_(4))_(2)F材料具有结构稳定、安全性高及工作电压高等特性,其开放的三维框架结构可以为钠离子的快速迁移提供路径,是目前最具发展潜力的钠离子电池正极材料之一。然而,Na_(3)(VOPO_(4))_(2)F的本征电子导电性较差... 详细信息

聚阴离子型Na_(3)(VOPO_(4))_(2)F材料具有结构稳定、安全性高及工作电压高等特性,其开放的三维框架结构可以为钠离子的快速迁移提供路径,是目前最具发展潜力的钠离子电池正极材料之一。然而,Na_(3)(VOPO_(4))_(2)F的本征电子导电性较差,导致倍率性能不理想。离子掺杂是一种提升材料导电性和电化学性能的有效策略。通过水热法成功制备了S^(2-)掺杂的Na_(3)(VOPO_(4))_(2)S_(x)F材料。XRD和电化学阻抗结果表明,S^(2-)掺杂可以扩大离子扩散通道并降低电荷传输电阻;恒电流间歇滴定测试结果显示S^(2-)掺杂可以加快离子迁移速率。因此,Na_(3)(VOPO_(4))_(2)S_(x)F正极材料在钠离子半电池中表现出优异的电化学性能,在30C倍率下可逆比容量为66.8mA·h/g,在10C倍率下循环500次后容量保持率可达96%。Na_(3)(VOPO_(4))_(2)S_(x)F正极与硬碳负极组成的钠离子全电池可获得121.7mA·h/g的高比容量,在1C倍率下循环60次后,其容量衰减可以忽略不计。

关键词：氟磷酸钒氧钠离子掺杂正极材料钠离子电池

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城市居住街区的适宜规模尺度探讨——从居住小区到居住街区的转变

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城市建筑 2024年第9期21卷 140-144页

作者：李先勇黄舟北京市建筑设计研究院股份有限公司

文章针对国内的具体现状,比较全面地对居住街区的合理规模进行了分析,分别从城市路网的规划、配套设施的服务半径、邻里空间的建立、城市活力和经济的发展、公共权益的维护等角度分析了居住街区规模尺度的上限,从空间层次的创造、配套... 详细信息

文章针对国内的具体现状,比较全面地对居住街区的合理规模进行了分析,分别从城市路网的规划、配套设施的服务半径、邻里空间的建立、城市活力和经济的发展、公共权益的维护等角度分析了居住街区规模尺度的上限,从空间层次的创造、配套设施的规模效益、配套设施的分级设置等角度分析了居住街区规模尺度的下限,认为居住街区规模用地范围为4~6.25 hm^(2),户数控制在1000~2000户,人数控制在3000~5000人比较合适。

关键词：居住街区规模邻里空间公共权益

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Experimental and numerical investigation of TVOC concentrations and ventilation dilution in enclosed train cabin

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Building Simulation 2022年第5期15卷 831-844页

作者： Le Zhao huang zhou Yuzhen Jin Zeqing Li Key Laboratory of Fluid Transmission Technology of Zhejiang Province Zhejiang Sci-Tech UniversityHangzhou 310018China Hangzhou Yunze Environmental Technology Co. LtdHangzhouChina

Air pollution in trains is an important factor threatening human health,which has attracted more and more attention in the worldwide public health *** this study,one cabin of a fully enclosed train was taken as an example to conduct experimental and numerical research on pollution level and distribution characteristic of total volatile organic compound(TVOC).The results show that when the average emission rate under daily environmental conditions was taken as the reference,TVOC concentration in the cabin exceeded the limit level of Chinese Indoor Air Quality Standard by more than 4 *** obvious pollutants accumulative phenomenon could be found at bottoms and corners under the action of *** air inlets at the roof of the train,mean age of air ranged from 30 s to 50 s in the breathing *** concentration of pollutants was the lowest at 2.5-5 m from the center point of the cabin structure,and the ventilation efficiency was the *** introduction of clean fresh air could effectively eliminate *** the complete displacement ventilation rates were 51.4 h^(-1) and 28.6 h_1,the removal efficiency of pollutants was about 0.85 and 0.48 mg/m3 per minute,*** study was helpful to the improvement and optimization design of air quality and ventilation mode in trains.

关键词： indoor air quality VOCs CFD railway cabins ventilation dilution

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Acid-stable antimonate based catalysts for the electrocatalytic oxygen evolution reaction

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Nano Research 2023年第4期16卷 4691-4697页

作者： Xiaoping Gao huang zhou Zhe Wang Gang zhou Jin Wang Yuen Wu College of Materials Science and Engineering Shenzhen UniversityShenzhen 518071China School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026China Preservation Technology Advanced Research CenterHefei Hualing Co.LtdHefei 230000China School of Science Hubei University of TechnologyWuhan 430068China

Acid-stable and highly active catalysts for the electrocatalytic oxygen evolution reaction(OER)are paramount to the advancement of electrochemical technologies for clean energy conversion and *** this work,based on the density functional theory(DFT)calculations,we systematically investigated the MSb_(2)O_(6)(M=Fe,Co,and Ni)and transition metal(TM)doped MSb_(2)O_(6)(TM-MSb_(2)O_(6),TM=Mn,Fe,Co,Ni,Cu,Zn,Ru,Rh,Pd,Ir,and Pt)as potential antimonate-based electrocatalysts for the *** stability and OER activity of these considered electrocatalysts were systematically studied under acidic *** was found that Rh-NiSb_(2)O_(6),Pt-CoSb_(2)O_(6),Rh-FeSbO4,and Co-NiSb_(2)O_(6)can serve as efficient and stable OER electrocatalysts,and their OER catalytic activities are better than that of the current state-of-the-art OER catalyst(IrO2).Our findings highlight a family of promising antimonate-based OER electrocatalysts for future experimental verification.

关键词： oxygen evolution reaction antimonates acid-stable oxides electrocatalysis density functional theory

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老挝固体钾盐尾矿低成本胶凝固化材料研究

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矿业研究与开发 2024年第5期44卷 66-73页

作者：郑伯坤石勇黄腾龙彭亮郑博洋尹旭岩周晃江科长沙矿山研究院有限责任公司湖南长沙410012 金属矿山安全技术国家重点实验室湖南长沙410012 湖南省矿山固废综合利用工程技术研究中心湖南长沙410012

为解决钾盐尾矿尾盐与老卤难固结以及固结成本高等难题,开展了传统常规胶凝材料与尾盐的强度配比试验,分析尾盐的固结特性,根据尾盐的特性,研发了两种新型胶凝材料,并探究了新型胶凝材料在不同灰砂比和质量浓度下与尾盐的固结强度。研... 详细信息

为解决钾盐尾矿尾盐与老卤难固结以及固结成本高等难题,开展了传统常规胶凝材料与尾盐的强度配比试验,分析尾盐的固结特性,根据尾盐的特性,研发了两种新型胶凝材料,并探究了新型胶凝材料在不同灰砂比和质量浓度下与尾盐的固结强度。研究结果表明,以氧化钙作为胶凝材料,当灰砂比较大时,其与尾盐混合后的固结效果差,试块抗压强度低,而随着灰砂比的降低,试块的最佳强度可达到1.20 MPa;氧化镁可以显著提升尾盐充填体的强度,试块28 d强度最高可达22.06 MPa;粉煤灰和钢渣作为胶凝材料时,尾盐和老卤无法实现固结,不宜作为尾盐的胶凝材料。1^(#)新型胶凝材料与尾盐混合固结后试块的强度偏低,最高强度仅达到1.20 MPa,不能满足充填体的强度要求,但其能降低充填体表面的粗糙程度;2^(#)新型胶凝材料在灰砂比为1∶8且料浆质量浓度为72%时,试块的28 d强度可以达到3.17 MPa;与氧化镁相比,当试块强度达到2.00~3.00 MPa时,胶凝材料的充填成本降低了50%以上。

关键词：钾盐尾矿尾盐胶凝固化材料充填体强度充填成本

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