检索结果-南通市图书馆

Robustness of pair structures for nuclear yrast states

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2023年第6期47卷 99-107页

作者：潘一飞程奕源路毅姜慧周先荣赵玉民 Department of Physics East China Normal UniversityShanghai 200241China College of Physics and Engineering Qufu Normal UniversityQufu 273165China School of Science Shanghai Maritime UniversityShanghai 201306China School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China IFSA Collaborative Innovation Center Shanghai Jiao Tong UniversityShanghai 200240China

In this study,we investigate the robustness of pair structures for nuclear yrast states,that is,whether the structures of relevant collective pairs as building blocks of different yrast states are the *** focus on deformed and transitional nuclei and study the yrast states of^(28)Si,^(50)Cr,and^(132)Xe,whose experimental R_(4/2)values are 2.60,2.40,and 2.16,respectively,using the nucleon-pair approximation(NPA)and shell-model effective *** each yrast state,we consider optimized pair structures to be those providing the energy minimum for this *** find the minimum,many full NPA calculations are performed with varying pair structures,and the numerical optimization procedure of the conjugate gradient method is *** results suggest that optimized pair structures remain the same for all states within a rotational band of a deformed *** results also suggest that after backbending,that is,changing of the intrinsic state,the structure of the S pair,which is essential to build the monopole pairing correlation,remains approximately unchanged,whereas the structures of the non-S pairs,which are essential to build the quadrupole correlation,change significantly.

关键词： nucleon-pair approximation robustness of optimized pair structures yrast states backbending

同方期刊数据库

Co-production of hydrogen, oxygen, and electricity via an integrated solar-driven system with decoupled water electrolyzer and Na-Zn ion battery

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 621-627页

作者： fei Lv Longjie Liu Jiazhe Wu Pengfei Wang Lixia pan Dengwei Jing Yubin Chen International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University

Combining water electrolysis and rechargeable battery technologies into a single system holds great promise for the co-production of hydrogen （H2） and ***,the design and development of such systems is still in its ***,an integrated hydrogen-oxygen （O2）-electricity co-production system featuring a bipolar membrane-assisted decoupled electrolyzer and a Na-Zn ion battery was established with sodium nickelhexacyanoferrate （NaNiHCF） and Zn2+/Zn as dual redox *** decoupled electrolyzer enables to produce H2and O2in different time and space with almost 100%Faradaic efficiency at 100 mA ***,the charged NaNiHCF and Zn electrodes after the electrolysis processes formed a Na-Zn ion battery,which can generate electricity with an average cell voltage of 1.75 V at 10 m A *** connecting Si photovoltaics with the modular electrochemical device,a well-matched solar driven system was built to convert the intermittent solar energy into hydrogen and electric energy with a solar to hydrogen-electricity efficiency of 16.7%,demonstrating the flexible storage and conversion of renewables.

关键词： Hydrogen Electricity Decoupled water electrolyzer Na-Zn ion battery Solar energy

Surface embedded binary Co-Cu hydroxy phosphate over surface of oxy/hydroxides for efficient nitrate reduction to ammonia

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2025年第1期18卷 195-207页

作者： Chun Zhu yifei Yang yike Jing Zhen Zeng Xuesong yi Wei Sun fei Yang Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province School of Environmental Science and EngineeringHainan UniversityHaikou 570228China

Electrochemical nitrate reduction reaction(NO3RR)to ammonia is a promising approach to address excess Ncontamination in aqueous environment but suffers from a limited ammonia yield and selectivity due to the low concentration and sluggish *** work reports a three-dimensional porous electrode with binary Co_(2)Cu_(1)hydroxy phosphate embedded into the surface of Ni_(3)Co_(1)oxy/hydroxides(CoCu-PH@NiCo/Ni,“PH”means phosphate-hydroxide),which delivers a yield of 4.13 mg·h^(-1)·cm^(-2)with a high Faraday efficiency of 92.6%under a low nitrate concentration of 40 mM and provide an impressive *** embedded structure of the as-prepared catalyst exhibits unique metal coordination ligands and valence states different from the unitary *** electrochemical in situ infrared spectra and theoretical calculations revealed that the Co sites with the ability to dissociate water molecular to form adsorbed OH*can effectively provide the required protons for the deoxygenation and hydrogenation steps during NO3-conversion,thereby,effectively reducing the energy barrier of the key transition states in the NO3RR process to improve the intrinsic *** demonstrate that the rational design of binary components with the appropriate ability to activate water molecules as well as the threedimensional porous skeletal structure are expected to promote effectively the low-concentration nitrates conversion to ammonia.

关键词： nitrate reduction hydroxy phosphate surface embedded water dissociation active hydroxy adsorbed

Crystallization Modulation and Holistic Passivation Enables Efficient Two‑Terminal Perovskite/CuIn(Ga)Se_(2)Tandem Solar Cells

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

Nano-Micro Letters 2025年第1期17卷 205-215页

作者： Cong Geng Kuanxiang Zhang Changhua Wang Chung Hsien Wu Jiwen Jiang fei Long Liyuan Han Qifeng Han yi‑Bing Cheng Yong Peng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Triumph Photovoltaic Materials Co. Ltd.No.1001 Yannan AvenueHigh‑Tech Development DistrictBengbuAnhui 233000People’s Republic of China College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004People’s Republic of China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Two-terminal(2-T)perovskite(PVK)/CuIn(Ga)Se_(2)(CIGS)tandem solar cells(TSCs)have been considered as an ideal tandem cell because of their best bandgap matching regarding to Shockley–Queisser(S–Q)***,the nature of the irregular rough morphology of commercial CIGS prevents people from improving tandem device *** this paper,D-homoserine lactone hydrochloride is proven to improve coverage of PVK materials on irregular rough CIGS surfaces and also passivate bulk defects by modulating the growth of PVK *** addition,the minority carriers near the PVK/C60 interface and the incompletely passivated trap states caused interface recombination.A surface reconstruction with 2-thiopheneethylammonium iodide and N,N-dimethylformamide assisted passivates the defect sites located at the surface and grain ***,LiF is used to create this field effect,repelling hole carriers away from the PVK and C60 interface and thus reducing *** a result,a 2-T PVK/CIGS tandem yielded a power conversion efficiency of 24.6%(0.16 cm^(2)),one of the highest results for 2-T PVK/CIGS TSCs to our *** validation underscores the potential of our methodology in achieving superior performance in PVK/CIGS tandem solar cells.

关键词： PVK/CIGS TSCs Irregular rough surfaces Modulating the growth PVK/C60 interface recombination

Characteristics of Preheating Combustion of Power Coal with High Coking Properties

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2021年第4期30卷 1108-1115页

作者： ZHANG yi ZHU Jianguo LYU Qinggang pan fei ZHU Shujun Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Yankuang coal with the high coking property is difficult to use through direct *** main purpose of this paper is to study the combustion characteristics and NO_(x)emissions of this type of coal using preheating combustion *** experimental results show that after the pulverized coal is preheated,the char residue characteristic is significantly reduced from 5 to *** the preheating process,the preheating temperature is stable at about 910°C,and the particle size of char after preheating is reduced,and the pore structure and specific surface areas are *** combustion temperature of preheated fuel is stable at around 1100℃,and the combustion efficiency can reach more than 99%under different *** the structure of the secondary air nozzles during the preheating combustion process can influence the characteristics of NO_(x)*** NO_(x)emission of the central nozzle is about 112 mg/Nm~(3)lower than that of the annular *** the tertiary air distribution modes can reduce the final NO_(x)emissions to 215 mg/Nm~3(@6%O_2),and the corresponding conversion ratio of fuel N to the final NO_(x)is 4.2%.The results of this experiment prove that the Yankuang coal can achieve stable combustion by preheating combustion technology,and this proposed a new way for the utilization of Yankuang coal.

关键词： Yankuang coal coking properties preheating combustion NO_(x)emissions

Effects of chitosan inhibitor on the electrochemical corrosion behavior of 2205 duplex stainless steel

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2017年第11期24卷 1260-1266页

作者： Se-fei Yang ying Wen pan yi Kui Xiao Chao-fang Dong Department of Stomatology General Hospital of the People’s Liberation Army Beijing 100853 China Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China Journals Publishing Center University of Science and Technology Beijing Beijing 100083 China

The effects of chitosan inhibitor on the corrosion behavior of 2205 duplex stainless steel were studied by electrochemical measurements, immersion tests, and stereology microscopy. The influences of immersion time, temperature, and chitosan concentration on the corrosion inhibition performance of chitosan were investigated. The optimum parameters of water-soluble chitosan on the corrosion inhibition performance of 2205 duplex stainless steel were also determined. The water-soluble chitosan showed excellent corrosion inhibition performance on the 2205 duplex stainless steel. Polarization curves demonstrated that chitosan acted as a mixed-type inhibitor. When the stainless steel specimen was immersed in the 0.2 g/L chitosan solution for 4 h, a dense and uniform adsorption film covered the sample surface and the inhibition efficiency(IE) reached its maximum value. Moreover, temperature was found to strongly influence the corrosion inhibition of chitosan; the inhibition efficiency gradually decreased with increasing temperature. The 2205 duplex stainless steel specimen immersed in 0.4 g/L water-soluble chitosan at 30°C displayed the best corrosion inhibition among the investigated specimens. Moreover, chitosan decreased the corrosion rate of the 2205 duplex stainless steel in an FeCl_3 solution.

关键词： inhibitor chitosan stainless steel corrosion behavior electrochemistry

From Intercalation to Alloying Chemistry: Structural Design of Silicon Anodes for the Next Generation of Lithium-ion Batteries

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2020年第1期39卷 16-19,1页

作者： YANG Yu-fei YANG Jin-Long pan Feng CUI yi Department of Materials Science and Engineering Stanford UniversitySta nfordCA 94305USA School of Advanced Materials Peking UniversityShenzhen Graduate SchoolShenzhen 518055China Stanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory2575 Sand Hill RoadMenlo ParkCA 94025USA

Lithium-ion batteries,first commercialized in 1991,have been thriving for the past 30 years and become an important basis for portable electronics and electric ***,this first generation of lithium-ion batteries built on the intercalation materials has limited energy density and can not meet the increased demand of various ***,a transition from intercalation to alloying chemistry for anodes is on ***,as the most attractive alloying anode material,has been on the research focus for next-generation highenergy density *** mechanism benefits silicon a large capacity while brings silicon the challenge of volume *** article discusses the structure design strategies to address the issues of large volume change and interface instability.

关键词： silicon anode alloying chemistry structural design lithium-ion battery

Exploring the mechanisms of calcium carbonate deposition on various substrates with implications for effective anti-scaling material selection

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第4期21卷 2870-2880页

作者： Lu Gong fei-yi Wu Ming-fei pan Jun Huang Hao Zhang Jing-Li Luo Hong-Bo Zeng College of Science China University of PetroleumBeijing102249China Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of PetroleumBeijing102249China Basic Research Center for Energy Interdisciplinary College of ScienceChina University of PetroleumBeijing102249China Department of Chemical and Materials Engineering University of AlbertaEdmontonAlbertaT6G 1H9Canada Key Laboratory of High Efficiency and Clean Mechanical Manufacture(Ministry of Education) School of Mechanical EngineeringShandong University

The unexpected scaling phenomena have resulted in significant damages to the oil and gas industries,leading to issues such as heat exchanger failures and pipeline *** is of practical and fundamental importance to understand the scaling mechanisms and develop efficient anti-scaling ***,the underlying surface interaction mechanisms of scalants(e.g.,calcite)with various substrates are still not fully *** this work,the colloidal probe atomic force microscopy(AFM)technique has been applied to directly quantify the surface forces between calcite particles and different metallic substrates,including carbon steel(CR1018),low alloy steel(4140),stainless steel(SS304)and tungsten carbide,under different water chemistries(i.e.,salinity and pH).Measured force profiles revealed that the attractive van der Waals(VDW)interaction contributed to the attachment of the calcium carbonate particles on substrate surfaces,while the repulsive electric double layer(EDL)interactions could inhibit the attachment *** salinity and acidic p H conditions of aqueous solutions could weaken the EDL repulsion and promote the attachment *** adhesion of calcite particles with CR1018 and4140 substrates was much stronger than that with SS304 and tungsten carbide *** bulk scaling tests in aqueous solutions from an industrial oil production process showed that much more severe scaling behaviors of calcite was detected on CR1018 and 4140 than those on SS304 and tungsten carbide,which agreed with surface force measurement ***,high salinity and acidic p H can significantly enhance the scaling *** work provides fundamental insights into the scaling mechanisms of calcite at the nanoscale with practical implications for the selection of suitable antiscaling materials in petroleum industries.

关键词： Scaling phenomenon Metallic substrates Surface forces Bulk scaling tests

Visible-light-induced four-component difunctionalization of alkenes to construct phosphorodithioate-containing quinoxalin-2(1H)-ones

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第11期35卷 367-371页

作者： Xiao-Ming Chen Lianhui Song Jun pan fei Zeng yi Xie Wei Wei Dong yi Department of Biology and Chemistry Hunan University of Science and EngineeringYongzhou 425199China School of Chemistry and Chemical Engineering Qufu Normal UniversityQufu 273165China Green Pharmaceutical Technology Key Laboratory of Luzhou City School of PharmacySouthwest Medical UniversityLuzhou 646000China

A facile visible-light-induced 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene(4Cz IPN)catalyzed fourcomponent reaction of alkenes,quinoxalin-2(1H)-ones,P4S10and alcohols has been developed at room *** tandem reaction provides an efficient strategy for the construction of various phosphorodithioate-containing quinoxalin-2(1H)-ones with moderate to good yields by using air(dioxygen)as the green *** studies revealed a radical process was involved in this photochemical reaction.

关键词： Visible-light catalysis Four-component reaction Phosphorodithioate Quinoxalin-2(1H)-ones