检索结果-南通市图书馆

维普期刊数据库

Observation of.acoustic hybrid topological phases induced by the p-d orbital interactions

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： Xiao Xiang f.ng Gao Yu-Gui peng peng Wu Zong-Lin Li Xue-f.ng Zhu School of.Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge f.elds,which redef.ne the f.ndamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge f.elds have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of.hybrid topological phases induced by hybrid synthetic gauge f.ux,which is f.rmed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of.Lxand/or Ly,we unambiguously demonstrate the f.rst-order M?bius edge states and higher-order corner *** work establishes a platf.rm f.r seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the f.amework of.hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of.the hybrid topological phase.

关键词： topological insulator synthetic gauge f.eld projective symmetry corner states

Multi boron-doping ef.ects in hard carbon toward enhanced sodium ion storage

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of.Energy Chemistry 2025年第1期100卷 730-738页

作者： peng Zheng Wang Zhou Ying Mo Biao Zheng Miaomiao Han Qin Zhong Wenwen Yang peng Gao Lezhi Yang Jilei Liu College of.Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan University Greater Bay Area Institute f.r Innovation Hunan University Changsha Research Institute of.Mining & Metallurgy Co. LTD.

Hard carbon （HC） has been considered as promising anode material f.r sodium-ion batteries （SIBs）.The optimization of.hard carbon’s microstructure and solid electrolyte interf.ce （SEI） property are demonstrated ef.ective in enhancing the Na+storage capability,however,a one-step regulation strategy to achieve simultaneous multi-scale structures optimization is highly ***,we have systematically investigated the ef.ects of.boron doping on hard carbon’s microstructure and interf.ce chemistry.A variety of.structure characterizations show that appropriate amount of.boron doping can increase the size of.closed pores via rearrangement of.carbon layers with improved graphitization degree,which provides more Na+storage ***-situ f.urier transf.rm inf.ared spectroscopy/electrochemical impedance spectroscopy （f.IR/EIS） and X-ray photoelectron spectroscopy （XPS） analysis demonstrate the presence of.more BC3and less B–C–O structures that result in enhanced ion dif.usion kinetics and the f.rmation of.inorganic rich and robust SEI,which leads to f.cilitated charge transf.r and excellent rate *** a result,the hard carbon anode with optimized boron doping content exhibits enhanced rate and cycling *** general,this work unravels the critical role of.boron doping in optimizing the pore structure,interf.ce chemistry and dif.usion kinetics of.hard carbon,which enables rational design of.sodium-ion battery anode with enhanced Na+storage perf.rmance.

关键词： X ray photoelectron spectroscopy

Optimization of.cavitation venturi tube design f.r pico and nano bubbles generation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International Journal of.Mining Science and Technology 2015年第4期25卷 523-529页

作者： Xiong Yu peng felicia Department of.Mining Engineering West Virginia University

Hydrodynamic cavitaion venturi tube technique is used f.r pico and nano bubble generations in coal column f.otation. In order to determine the optimal design of.hydrodynamic cavitation venture tube f.r pico and nano bubble generation, a f.ur-f.ctor three-level Central Composite Design of.Experimental was conducted f.r investigating f.ur important design parameters of.cavitation venturi tube governing the median size and the volume of.pico and nano bubbles. The test results showed that maximum volume of.pico and nano bubbles, 65–75%, and minimum mean pico and nano bubble size,150–240 nm, were achieved at the medium ratio of.the diameter of.outlet of.the venturi-tube and diameter of.throat(3–4), medium outlet angle(11–13°), high inlet angle(26–27°) and high ratio of.the length of.the throat and the diameter of.throat(2.3–3). Study the ef.ects of.the producing pico and nano bubbles on f.ne coal f.otation was perf.rmed in a 5 cm diameter 260 cm height f.otation column. The optimal percentage of.pico and nano bubbles was about 70%, which produced maximum combustible material recovery of.86% with clean coal ash content of.11.7%.

关键词： Hydrodynamic cavitation venture tub edesign Pico and nano bubbles Bubble volume and mean size distributions Coal Column f.oth f.otation

维普期刊数据库

Boosting bidirectional sulf.r conversion enabled by introducing boron-doped atoms and phosphorus vacancies in Ni2P f.r lithium-sulf.r batteries

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 760-769页

作者： Lin peng Yu Bai Hang Li Meixiu Qu Zhenhua Wang Kening Sun Advanced Research Institute of.Multidisciplinary Science Beijing Institute of Technology Beijing Key Laboratory of.Chemical Power Source and Green Catalysis School of Chemistry and Chemical Engineering Beijing Institute of Technology

Lithium-sulf.r （Li-S） batteries have gained great attention due to the high theoretical energy density and low cost,yet their f.rther commercialization has been obstructed by the notorious shuttle ef.ect and sluggish redox ***,we supply a strategy to optimize the electron structure of.Ni2P by concurrently introducing B-doped atoms and P vacancies in Ni2P （Vp-B-Ni2P）,thereby enhancing the bidirectional sulf.r *** study indicates that the simultaneous introduction of.B-doped atoms and P vacancies in Ni2P causes the redistribution of.electron around Ni atoms,bringing about the upward shif. of.d-band center of.Ni atoms and ef.ective d-p orbital hybridization between Ni atoms and sulf.r species,thus strengthening the chemical anchoring f.r lithium polysulf.des （LiPSs） as well as expediting the bidirectional conversion kinetics of.sulf.r ***,theoretical calculations reveal that the incorporation of.B-doped atoms and P vacancies in Ni2P selectively promotes Li2S dissolution and nucleation ***,the Li-S batteries with Vp-B-Ni2P-separators present outstanding rate ability of.777 m A h g-1at 5 C and high areal capacity of.8.03 mA h cm-2under E/S of.5μL mg-1and sulf.r loading of.7.20 mg *** work elucidates that introducing heteroatom and vacancy in metal phosphide collaboratively regulates the electron structure to accelerate bidirectional sulf.r conversion.

关键词： Lithium sulf.r batteries

Increase in the variability of.terrestrial carbon uptake in response to enhanced f.ture ENSO modulation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2025年第1期18卷 32-38页

作者： Younong Li Li Dan Jing peng Qidong Yang f.qiang Yang Key Laboratory of.Regional Climate-Environment f.r Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Key Laboratory of.Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region Department of Atmospheric ScienceYunnan UniversityKunmingChina

El Niño-Southern Oscillation(ENSO)is a major driver of.climate change in middle and low latitudes and thus strongly inf.uences the terrestrial carbon cycle through land-air *** the ENSO modulation and carbon f.ux variability are projected to increase in the f.ture,but their connection still needs f.rther *** investigate the impact of.f.ture ENSO modulation on carbon f.ux variability,this study used 10 CMIP6 earth system models to analyze ENSO modulation and carbon f.ux variability in middle and low latitudes,and their relationship,under dif.erent scenarios simulated by CMIP6 *** results show a high consistency in the simulations,with both ENSO modulation and carbon f.ux variability showing an increasing trend in the *** higher the emissions scenario,especially SSP5-8.5 compared to SSP2-4.5,the greater the increase in *** f.ux variability in the middle and low latitudes under SSP2-4.5 increases by 30.9%compared to historical levels during 1951-2000,while under SSP5-8.5 it increases by 58.2%.f.rther analysis suggests that ENSO inf.uences mid-and low-latitude carbon f.ux variability primarily through *** occurrence may potentially be attributed to the increased responsiveness of.gross primary productivity towards regional temperature f.uctuations,combined with the intensif.ed inf.uence of.ENSO on land surf.ce temperatures.

关键词： Carbon variability ENSO modulation CMIP6 models

Synergistic ef.ect of.bonding heterogeneity and phonon localization in introducing excellent thermoelectric properties in layered heteroanionic NdZnSbO material

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

Journal of.Energy Chemistry 2025年第1期100卷 259-272页

作者： Da Wan Shuwei Tang Shulin Bai Xiaodong Li peng Ai Wanrong Guo Tuo Zheng College of.Materials Science and Engineering Liaoning Technical University f.culty of.Chemistry Northeast Normal University

Layered rare-earth metal oxides, harnessing the dual properties of.oxides and two-dimensional layered materials, exhibit remarkable thermal stability and quantum conf.nement ef.ects. Theref.re, this work adopts the f.rst-principles calculation combined with the Boltzmann transport theory to predict the thermoelectric properties of.NdZnSbO compound. The coexistence of.weak interlayer van der Waals interactions, robust intralayer ionic bonding, and partial covalent bonding leads to remarkable bonding heterogeneity, which engenders pronounced phonon scattering and imposes constraints on thermal transport along the out-of.plane direction. The weakened chemical bonds induced by the antibonding states, together with the rattling-like behavior of.the Zn atom, culminate in the prof.und anharmonicity in the layered NdZnSbO compound. The weakening bond and heavy element contribute to the sof.ness of.phonon modes, which signif.cantly diminishes the phonon group velocity. The redistribution-dominated f.ur-phonon scattering process spans a large optical gap, which ef.ectively reduces the lattice thermal conductivity. The NdZnSbO compound exhibits direct semiconductor characteristic with a bandgap of.0.73 e V by adopting the Heyd-Scuseria-Ernzerhof.HSE06) f.nctional in combination with spin–orbit coupling(SOC) ef.ect. The multi-valley f.ature of.NdZnSbO compound augur f.vorably f.r band degeneracy, thus amplif.ing the power f.ctor. Consequently, an optimal f.gure-of.merit(ZT) of.3.40 at 900 K is achieved f.r the n-type NdZnSbO compound. The present study delves deeply insights into the origins f.r the low thermal conductivity of.NdZnSbO compound and proposes an optimization scheme to enhance overall thermoelectric perf.rmance.

关键词： Bond strength (chemical)

High-temperature-tolerant f.exible supercapacitors: Gel polymer electrolytes and electrode materials

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of.Energy Chemistry 2025年第1期100卷 426-457页

作者： Chong peng Xinyi Huang Mingwei Zhao Shuling Liao Quanhong Yang Nianjun Yang Siyu Yu School of.Chemistry & Chemical Engineering Southwest University Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage School of Chemical Engineering and Technology and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Department of.Chemistry & IMO-IMOMEC Hasselt University

The development of.f.exible supercapacitors(f.Cs) capable of.operating at high temperatures is crucial f.r expanding the application areas and operating conditions of.supercapacitors. Gel polymer electrolytes and electrode materials stand as two key components that signif.cantly impact the ef.icacy of.hightemperature-tolerant f.Cs(HT-f.Cs). They should not only exhibit high electrochemical perf.rmance and excellent f.exibility, but also withstand intense thermal stress. Considerable ef.orts have been devoted to enhancing their thermal stability while maintaining high electrochemical and mechanical perf.rmance. In this review, the f.ndamentals of.HT-f.Cs are outlined. A comprehensive overview of.state-of.the-art progress and achievements in HT-f.Cs, with a f.cus on thermally stable gel polymer electrolytes and electrode materials is provided. f.nally, challenges and f.ture perspectives regarding HT-f.Cs are discussed, alongside strategies f.r elevating operational temperatures and *** review of.ers both theoretical f.undations and practical guidelines f.r designing and manuf.cturing HT-f.Cs, f.rther promoting their widespread adoption across diverse f.elds.

关键词： f.exible supercapacitors High-temperature tolerance Gel polymer electrolytes Electrode materials

Electrochemical conversion of.methane to bridge the gap in the artif.cial carbon cycle

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of.Energy Chemistry 2025年第1期100卷 286-308页

作者： Yuhao peng Yuef.ng Song Ihar Razanau Juanxiu Xiao Wei Xiao Di Hu Guoxiong Wang College of.Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University State Key Laboratory of.Catalysis Dalian National Laboratory for Clean Energy iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Dalian Institute of Chemical Physics Chinese Academy of Sciences Laboratory of.Physical-Chemical Technologies SSPA Scientific and Practical Materials Research Centre of NAS of Belarus State Key Laboratory of.Marine Resources Utilization in South China Sea Collaborative Innovation Center of Marine Science and Technology School of Marine Science and Engineering Hainan University Department of.Chemical and Environmental Engineering University of Nottingham Ningbo China

Methane, an abundant one-carbon（C1） resource, is extensively used in the industrial production of.vital f.els and value-added chemicals. However, current industrial methane conversion technologies are energy-and carbon-intensive, mainly due to the high activation energy required to break the inert C–H bond, low selectivity, and problematic side reactions, including CO2emissions and coke deposition. Electrochemical conversion of.methane（ECM） using intermittent renewable energy of.ers an attractive solution, due to its modular reactor design and operational f.exibility across a broad spectrum of.temperatures and pressures. This review emphasizes conversion pathways of.methane in various reaction systems, highlighting the signif.cance and advantages of.ECM in f.cilitating a sustainable artif.cial carbon cycle. This work provides a comprehensive overview of.conventional methane activation mechanisms and delineates the complete pathways of.methane conversion in electrolysis contexts. Based on surf.ce/interf.ce chemistry, this work systematically analyzes proposed reaction pathways and corresponding strategies to enhance ECM ef.iciency towards various target products, including syngas, hydrocarbons, oxygenates, and advanced carbon materials. The discussion also encompasses opportunities and challenges f.r the ECM process, including insights into ECM pathways, rational electrocatalyst design, establishment of.benchmarking protocols, electrolyte engineering, enhancement of.CH4conversion rates, and minimization of.CO2emission.

关键词： Methane Electrochemical conversion Reaction mechanism Catalyst design Electrode Electrocatalysis

Ru doping triggering reconstruction of.cobalt phosphide f.r coupling glycerol electrooxidation with seawater electrolysis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of.Energy Chemistry 2025年第1期100卷 317-326页

作者： Binglu Deng Jie Shen Jinxing Lu Chuqiang Huang Zhuoyuan Chen f.ng peng Yunpeng Liu School of.Materials Science and Hydrogen Energy Foshan University School of.Chemistry and Chemical Engineering Guangzhou University Guangdong Key Laboratory f.r Hydrogen Energy Technologies

Seawater electrolysis is a promising approach f.r sustainable energy without relying on precious ***,the large-scale seawater electrolysis is hindered by low catalytic ef.iciency and severe anode corrosion caused by the harmf.l *** contrast to the oxygen evolution reaction （OER）and chlorin ion oxidation reaction （ClOR）,glycerol oxidation reaction （GOR） is more thermodynamically and kinetically f.vorable ***,a Ru doping cobalt phosphide （Ru-CoP2） is proposed as a robust bif.nctional electrocatalyst f.r seawater electrolysis and GOR,f.r the concurrent productions of.hydrogen and value-added *** in situ and ex situ characterization analyses demonstrated that Ru doping f.atured in the dynamic reconstruction process f.om Ru-CoP2to Ru-CoOOH,accounting f.r the superior GOR *** coupling GOR with hydrogen evolution was realized by employing Ru-CoP2as both anode and cathode,requiring only a low voltage of.1.43 V at 100 mA cm-2,which was 250 m V lower than that in alkaline *** work guides the design of.bif.nctional electrocatalysts f.r energy-ef.icient seawater electrolysis coupled with biomass resource upcycling.

关键词： Glycerol electrooxidation Hydrogen evolution Ru doping Cobalt phosphide Bif.nctional electrocatalysts