检索结果-南通市图书馆

Effect of CeO_(2) nanoparticle sizes on catalytic performances of sulfated CeO_(2)/Al_(2)O_(3) catalyst in NH_(3)-SCR reaction

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第3期42卷 515-522,I0004页

作者： Zhenghua Hu Dongqi An Lei Zhang Xuping Wang Siyong fang Xinyun Tian liu qiu Jingfang Sun Tingzhen Li Lin Dong School of Environmental and Chemical Engineering Chongqing Three Gorges UniversityChongqing404000China Key Laboratory of Water Environment Evolution and Pollution Control in the Three Gorges Reservoir Chongqing Three Gorges UniversityChongqing404000China Jiangsu Key Laboratory of Vehicle Emissions Control Center of Modern AnalysisNanjing UniversityNanjing210093China

The sulfated CeO_(2)/Al_(2)O_(3) catalysts with different sizes of CeO_(2)nanoparticles were prepared by using pure H_2O or acetic acid solution as impregnation solvent, and the influence of sizes of CeO_(2) nanoparticles on the catalytic performances of the sulfated CeO_(2)/Al_(2)O_(3) catalyst was studied. The catalytic performance tests show that the sulfated CeO_(2)/Al_(2)O_(3) catalyst using acetic acid solution as impregnation solvent has better catalytic activity and the resistance to K+poisoning than the sulfated CeO_(2)/Al_(2)O_(3) catalyst using pure H_(2)O as impregnation solvent. The excellent catalytic performances can be ascribed to the smaller sizes of CeO_(2) nanoparticles in CeO_(2)/Al_(2)O_(3) catalyst using acetic acid solution, which results in larger amount of adsorbed sulfate species, surface acid sites, surface active oxygen species and excellent redox property. These features are helpful for improving the catalytic performances of sulfated CeO_(2)/Al_(2)O_(3) catalyst using smaller amount of CeO_(2) to cut the costs.

关键词： Cerium-based catalyst Nanoscale effect NH_(3)selective catalytic reaction Sulfation process Alkali metal poisoning Rare earths

Interface engineering strategy via electron-defect trimethyl borate additive toward 4.7 V ultrahigh-nickel LiNi_(0.9)Co_(0.05)Mn_(0.05)O_(2)battery

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第5期92卷 639-647页

作者： Yilin Zhang Yuqing Chen qiu He Jinlong Ke Wei Wang Jian-fang Wu Peng Gao Yanhua Li Jilei liu College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan Province Key Laboratory for Advanced Carbon Materials and Applied TechnologyHunan UniversityChangsha 410082HunanChina College of Materials Science and Engineering Sichuan UniversityChengdu 610065SichuanChina School of Materials Science and Engineering Hunan Institute of TechnologyHengyang 421002HunanChina

The Li metal battery with ultrahigh-nickel cathode(LiNi_(x)M_(1-x)O_(2),M=Mn,Co,and x≥0.9)under high-voltage is regarded as one of the most promising approaches to fulfill the ambitious target of 400 Wh/***,the practical application is impeded by the instability of electrode/electrolyte interface and Ni-rich cathode *** we proposed an electron-defect electrolyte additive trimethyl borate(TMB)which is paired with the commercial carbonate electrolyte to construct highly conductive fluorine-and boron-rich cathode electrolyte interface(CEI)on LiNi_(0.9)Co_(0.05)Mn_(0.05)O_(2)(NCM90)surface and solid electrolyte interphase(SEI)on lithium metal *** modified CEI effectively mitigates the structural transformation from layered to disordered rock-salt phase,and consequently alleviate the dissolution of transition metal ions(TMs)and its“cross-talk”effect,while the enhanced SEI enables stable lithium plating/striping and thus demonstrated good compatibility between electrolyte and lithium metal *** a result,the common electrolyte with 1 wt%TMB enables 4.7 V NCM90/Li cell cycle stably over 100 cycles with 70%capacity *** work highlights the significance of the electron-defect boron compounds for designing desirable interfacial chemistries to achieve high performance NCM90/Li battery under high voltage operation.

关键词： NCM90 batteries Electrolyte additive Trimethyl borate

Recent progress of two-dimensional metal-base catalysts in urea oxidation reaction

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第8期43卷 3607-3633页

作者： Qi-Xiang Huang fang Wang Yong liu Bi-Ying Zhang fang-Ya Guo Zhong-qiu Jia Hao Wang Tian-Xiang Yang Hai-Tao Wu Feng-Zhang Ren Ting-Feng Yi School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471000China School of Environmental Engineering and Chemistry Luoyang Institute of Science and TechnologyLuoyang 471023China Henan Province International Joint Laboratory of Materials for Solar Energy Conversion and Lithium Sodium Based Battery Luoyang 471023China School of Chemistry and Life Sciences Suzhou University of Science and TechnologySuzhou 215009China School of Materials Science and Engineering Northeastern UniversityShenyang110819China

Urea oxidation reaction(UOR)is an auxiliary water electrolysis hydrogen production technology developed in recent years to replace oxygen evolution reaction and reduce energy consumption,which can produce hydrogen more efficiently by low theoretical potential,reduce the average cost of electrochemical hydrogen production,and is a frontier research hotspot for renewable hydrogen ***-dimensional(2D)nanomaterials as electrocatalysts have many favorable potential,such as it can effectively reduce the resistivity of materials and increase the specific surface area with *** paper reviews the application of 2D materials in UOR in alkaline *** a cross-sectional comparison of various material performance data including overpotential,Tafel slope,electrochemical active surface area(ECSA)and it stability test was conducted,which could illustrate the differences between materials composed of different *** addition,the main challenges hindering the progress of research on 2D materials in urea electrocatalysis processes and promising materials in this field in future are summarized and *** is believed that this review will contribute to designing and analyzing highperformance 2D urea electrocatalysts for water splitting.

关键词： Water splitting Urea oxidation reaction Two-dimensional Transition metal compounds Noble/non-noble metals

Application of artificial synapse based on all-inorganic perovskite memristor in neuromorphic computing

在线全文

学校读者我要写书评

暂无评论

Nano Materials Science 2024年第1期6卷 68-76页

作者： fang Luo Wen-Min Zhong Xin-Gui Tang Jia-Ying Chen Yan-Ping Jiang qiu-Xiang liu School of Physics&Optoelectric Engineering Guangdong University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou510006China

Artificial synapse inspired by the biological brain has great potential in the field of neuromorphic computing and artificial *** memristor is an ideal artificial synaptic device with fast operation and good ***,we have prepared a memristor device with Au/CsPbBr_(3)/ITO *** memristor device exhibits resistance switching behavior,the high and low resistance states no obvious decline after 400 switching *** memristor device is stimulated by voltage pulses to simulate biological synaptic plasticity,such as long-term potentiation,long-term depression,pair-pulse facilitation,short-term depression,and short-term *** transformation from short-term memory to long-term memory is achieved by changing the stimulation *** addition,a convolutional neural network was constructed to train/recognize MNIST handwritten data sets;a distinguished recognition accuracy of~96.7%on the digital image was obtained in 100 epochs,which is more accurate than other memristor-based neural *** results show that the memristor device based on CsPbBr3 has immense potential in the neuromorphic computing system.

关键词： Memristor CsPbBr_(3) Resistive switching Artificial synapse Neuromorphic computing

Hard-carbon hybrid Li-ion/metal anode enabled by preferred mesoporous uniform lithium growth mechanism

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第1期88卷 252-259,I0006页

作者： fang Yan Yan liu Yuan Li Yan Wang Zicen Deng Meng Li Zhenwei Zhu Aohan Zhou Ting Li Jingyi qiu Gaoping Cao Shaobo Huang Biyan Wang Hao Zhang School of Chemistry and Biological Engineering University of Science and TechnologyBeijing 100083China Research Institute of Chemical Defense Beijing 100191China College of Physics and Engineering Henan University of Science and TechnologyLuoyang 471023HenanChina National Base for International Science&Technology Cooperation School of ChemistryXiangtan UniversityXiangtan 411105HunanChina Materials and Manufacturing Department Beijing University of TechnologyBeijing 100124China

To achieve high energy density in lithium batteries,the construction of lithium-ion/metal hybrid anodes is a promising *** particular,because of the anisotropy of graphite,hybrid anode formed by graphite/Li metal has low transport kinetics and is easy to causes the growth of lithium dendrites and accumulation of dead Li,which seriously affects the cycle life of batteries and even causes safety ***,by comparing graphite with two types of hard carbon,it was found that hybrid anode formed by hard carbon and lithium metal,possessing more disordered mesoporous structure and lithophilic groups,presents better *** indicate that the mesoporous structure provides abundant active site and storage space for dead *** the synergistic effect of this structure and lithophilic functional groups(–COOH),the reversibility of hard carbon/lithium metal hybrid anode is maintained,promoting uniform deposition of lithium metal and alleviating formation of lithium *** hybrid anode maintains a 99.5%Coulombic efficiency(CE)after 260 cycles at a specific capacity of 500 m Ah/*** work provides new insights into the hybrid anodes formed by carbon-based materials and lithium metal with high specific energy and fast charging ability.

关键词： Hard carbon/Li metal hybrid anode Mesoporous structure Surface oxygen functional group Fast charging Lithium batteries

High nitrogen fertilizer input enhanced the microbial network complexity in the paddy soil

在线全文

学校读者我要写书评

暂无评论

Soil Ecology Letters 2024年第2期6卷 97-109页

作者： Yanan Chen Yan Li Tianyi qiu Haoran He Ji liu Chengjiao Duan Yongxing Cui Min Huang Chunyan Wu Linchuan fang The Research Center of Soil and Water Conservation and Ecological Environment Chinese Academy of Sciences and Ministry of EducationYangling712100China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water Conservation CAS and MWRYangling712100China University of Chinese Academy of Sciences Beijing100049China Institute of Environment Resource and Soil Fertilizer Zhejiang Academy of Agricultural SciencesHangzhou310021China College of Natural Resources and Environment Northwest A&F UniversityYangling712100China Hubei Province Key Laboratory for Geographical Process Analysis and Simulation Central China Normal UniversityWuhan430079China Department of Ecohydrology Leibniz Institute of Freshwater Ecology and Inland FisheriesBerlin12587Germany Sino-French Institute for Earth System Science College of Urban and Environmental SciencesPeking UniversityBeijing100871China College of Resources and Environmental Engineering Wuhan University of TechnologyWuhan430070China CAS Center for Excellence in Quaternary Science and Global Change Xi’an710061China

N fertilizer altered bacterial community compositions by changing soil nutrients.•Bacterial ammonia oxidation became predominated with the increasing N rate.•Excessive N input caused the information of a more complex microbial network.•Intensified microbial competition by excessive N was due to negative link ***(N)fertilization drives the structure and function of soil microbial communities,which are crucial for regulating soil biogeochemical cycling and maintaining ecosystem *** the N fertilizer effects on soil microbial composition and diversity have been widely investigated,it is generally overlooked that ecosystem processes are carried out via complex associations among microbiome ***,we examined the effects of five N fertilization levels(0,135,180,225,and 360 kg N ha−1)on microbial co-occurrence networks and key functional taxa such as ammonia-oxidizers in paddy *** results showed that N addition altered microbial community composition,which were positively related to soil total N and available phosphorus(P)*** abundance of ammonia-oxidizing archaea(AOA)significantly decreased after N addition,whereas ammonia-oxidizing bacteria(AOB)increased in N360 *** with low-N group(N0 and N135),the high-N group(N225 and N360)shaped more complex microbial webs and thus improved the stability of the microbial *** least squares path modeling further revealed that N fertilizer had a higher effect on microbial network complexity in the high-N group(0.83)than the low-N group(0.49).Although there were more positive links across all microbial networks,the proportion of negative links significantly increased in the high-N network,suggesting that excess N addition aggravated the competition among microbial *** these interactions between microbial communities and N fertilization advances our understanding of biogeochemical processes in paddy soils and their effects on nutrient supply to

关键词： nitrogen fertilizer paddy soil co-occurrence network microbial interaction

Formation,evolution,reconstruction of black shales and their influence on shale oil and gas resource

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Geology 2024年第3期7卷 551-585页

作者： Shi-zhen Li qiu-chen Xu Mu liu Guo-heng liu Yi-fan Li Wen-yang Wang Xiao-guang Yang Wei-bin liu Yan-fei An Peng Sun Tao liu Jiang-hui Ding Qian-chao Li Chao-gang fang State Key Laboratory of Continental Shale Oil Beijing 100083China The Key Laboratory of Unconventional Oil and Gas Geology China Geological SurveyBeijing 100083China Oil and Gas Survey China Geological SurveyMinistry of Natural ResourcesBeijing 100083China State Key Laboratory of Lithospheric and Environmental Coevolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School of Geosciences China University of Petroleum(East China)Qingdao 266580China School of Energy Resources China University of Geosciences(Beijing)Beijing 100083China Key Laboratory of Petroleum Resources Research Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School of Resource and Environment Engineering Anhui UniversityHefei 230601China Yangtze University Wuhan 430100China Nanjing Center China Geological SurveyNanjing 210016China National Elite Institute of Engineering CNPCBeijing 100096China

Black shales are important products of material cycling and energy exchange among the lithosphere,atmosphere,hydrosphere,and *** are widely distributed throughout geological history and provide essential energy and mineral resources for the development of human *** also record the evolution process of the earth and improve the understanding of the *** review focuses on the diagenesis and formation mechanisms of black shales sedimentation,composition,evolution,and reconstruction,which have had a significant impact on the formation and enrichment of shale oil and *** terms of sedimentary environment,black shales can be classified into three types:Marine,terrestrial,and marine-terrestrial transitional *** formation processes include mechanisms such as eolian input,hypopycnal flow,gravity-driven and offshore bottom *** a geological perspective,the formation of black shales is often closely related to global or regional major geological *** enrichment of organic matter is generally the result of the interaction and coupling of several factors such as primary productivity,water redox condition,and sedimentation *** terms of evolution,black shales have undergone diagenetic evolution of inorganic minerals,thermal evolution of organic matter and hydrocarbon generation,interactions between organic matter and inorganic minerals,and pore *** terms of reconstruction,the effects of fold deformation,uplift and erosion,and fracturing have changed the stress state of black shale reservoirs,thereby having a significant impact on the pore *** activity promotes the formation of veins,and have changed the material composition,stress structure,and reservoir properties of black *** resource effects,the deposition of black shales is fundamental for shale oil and gas resources,the evolution of black shales promotes the shale oil and gas formation and storage,and the reconstruction of black shales wou

关键词： Black shales Shale oil and gas Resource effects Sedimentary environment Sedimentary process Organic matter accumulation Diagenetic evolution Thermal evolution Organic matter and inorganic minerals Tectonic reconstruction Oil and gas exploration engineering Veins Fluid activity

在线全文

学校读者我要写书评

暂无评论

表面肌电信号在肌肉疲劳研究中的应用综述

计算机科学与探索 2024年第9期18卷 2261-2275页

作者：方博儒仇大伟白洋刘静山东中医药大学智能与信息工程学院济南250355

肌肉疲劳是肌肉在运动或劳动过程中遭受到过度使用或持续负荷后出现的生理现象,目前解析疲劳机制仍是复杂且多层次的研究难题。近年来,基于表面肌电信号的肌肉疲劳研究方法成为关注焦点,先进的信号处理技术和机器学习算法的应用提高了... 详细信息

肌肉疲劳是肌肉在运动或劳动过程中遭受到过度使用或持续负荷后出现的生理现象,目前解析疲劳机制仍是复杂且多层次的研究难题。近年来,基于表面肌电信号的肌肉疲劳研究方法成为关注焦点,先进的信号处理技术和机器学习算法的应用提高了对表面肌电数据的解码能力,深化了对肌肉疲劳机制的理解,为提升运动表现、预防运动损伤以及改善康复治疗提供了重要的技术支持。对近几年基于表面肌电信号的肌肉疲劳研究进行了全面综述,阐述了肌肉疲劳的定义以及目前常用的检测方法,并指出各种方法的特点和适用范围;从时域、频域、时频域等线性特征和使用非线性参数的方式详细介绍了表征肌肉疲劳的肌电特征,同时探讨了这些特征的优点与局限性;结合表征疲劳特征作为输入数据,对常用于肌肉疲劳的分类算法进行了探究,从机器学习和深度学习算法两个方面准确归纳了各算法的适用条件和优劣势;指出了现阶段肌肉疲劳研究所面临的挑战,并在提出可行解决方案的基础上,展望了未来的研究方向。

关键词：肌肉疲劳表面肌电肌电特征机器学习深度学习算法

同方期刊数据库

替代性生计提高生态补偿有效性的效果与机理——以草原生态补奖政策为例

在线全文

学校读者我要写书评

暂无评论

草业学报 2024年第6期33卷 29-46页

作者：苏柳方仇焕广刘会芳侯玲玲华南农业大学经济管理学院广东广州510642 中国人民大学农业与农村发展学院北京100872 兰州大学草地农业科技学院甘肃兰州730020 北京大学现代农学院北京100871

生态补偿有效性不足,资源约束下的生计受限是政策失效的重要原因。从替代性生计视角探讨生态补偿有效性提升,可为生态补偿和生计关系的不一致观点提供调和思路,也有助于促进生态补偿深化改革。本研究以草原生态补奖政策为例,利用甘肃和... 详细信息

生态补偿有效性不足,资源约束下的生计受限是政策失效的重要原因。从替代性生计视角探讨生态补偿有效性提升,可为生态补偿和生计关系的不一致观点提供调和思路,也有助于促进生态补偿深化改革。本研究以草原生态补奖政策为例,利用甘肃和青海两年追踪调查数据,基于牧户禁牧行为实验,采用区间数据模型和双变量probit模型,从非牧就业和就业培训视角,检验牧户过去6年的替代性生计特征和村级过去4年的替代性生计措施对牧户禁牧受偿意愿的影响,揭示替代性生计对草原生态补奖政策有效性的提升作用。结果发现:牧户替代性生计特征是降低其禁牧受偿意愿、在当前补偿标准下优化补奖政策效果的重要因素,但只有高收益、高稳定性的高技能非牧就业才能发挥有效作用;村级提供就业培训服务有利于降低牧户禁牧受偿意愿、在当前补偿标准下提升补奖政策有效性,但该作用需持续3~4年的累积才能显现。因此,生态补偿改革应充分重视受偿主体的替代性生计转型和发展问题。

关键词：草原生态补奖政策替代性生计非牧就业培训受偿意愿行为经济学