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Atomic mobilities and diffusivities in Al alloys

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Science China(Technological Sciences) 2012年第2期55卷 306-328页

作者： DU Yong ZHANG LiJun CUI SenLin ZHAO DongDong LIU DanDan ZHANG WeiBin SUN WeiHua JIE WanQi State Key Laboratory for Powder Metallurgy Central South UniversityChangsha 410083China Interdisciplinary Centre for advanced materials Simulation Ruhr-Universitat BochumBochumGermany State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072China

Knowledge of diffusivity is a prerequisite for understanding many scientific and technological disciplines. In this paper, firstly major experimental methods, which are employed to provide various diffusivity data, are briefly described. Secondly, the fun-damentals of various computational methods, including first-principles method, embedded atomic method/molecular dynamic simulation, semi-empirical approaches, and phenomenological DICTRA technique, are demonstrated. Diffusion models re- cently developed for order/disorder transitions and stoichiometric compounds are also briefly depicted. Thirdly, a newly estab- lished diffusivity database for liquid, fcc_A1, Lie, bcc_A2, bcc_B2, and interrnetallic phases in the multicomponent A1 alloys is presented via a few case studies in binary, ternary and quaternary systems. And the integration of various computational techniques and experimental methods is highlighted. The reliability of this diffusivity database is validated by comparing the calculated and measured concentration profiles, diffusion paths, and Kirkendall shifts in various binary, ternary and quaternary diffusion couples. Next, the established diffusivity databases along with thermodynamic and other thermo-physical properties are utilized to simulate the microstructural evolution for Al alloys during solidification, interdiffusion and precipitation. A spe- cial discussion is presented on the phase-field simulation of interdiffusion microstructures in a series of Ni-Al diffusion couples composed of γ, γ＇, and β phases under the effects of both coherent strain and external compressive force. Future orientations in the establishment of next generation of diffusivity database are finally addressed.

关键词： AI alloys kinetics atomic mobilities diffusion DICTRA first-principles calculation phase-field simulation

Afterglow Carbon Dots:From fundamentals to Applications

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Research 2021年第1期2021卷 330-356页

作者： Chenxi Peng Xue Chen Meiling Chen Shenci Lu Yu Wang Suli Wu Xiaowang Liu Wei Huang Frontiers Science Center for Flexible Electronics(FSCFE) MIIT Key Laboratory of Flexible Electronics(KLoFE)Shaanxi Key Laboratory of Flexible ElectronicsXi’an Key Laboratory of Flexible ElectronicsXi’an Key Laboratory of Biomedical Materials&EngineeringXi’an Institute of Flexible ElectronicsInstitute of Flexible Electronics(IFE)Northwestern Polytechnical UniversityXi’an710072 ShaanxiChina International Collaborative Laboratory of 2D materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsChina State Key Laboratory of Fine Chemicals Dalian University of Technology2nd Linggong RoadDalian 116024China Key Laboratory for Organic Electronics and Information Displays&Institute of advanced materials(IAM) Nanjing University of Posts&Telecommunications9 Wenyuan RoadNanjingChina Key Laboratory of Flexible Electronics(KLOFE)and Institute of advanced materials(IAM) Nanjing Tech University(NanjingTech)30 South Puzhu RoadNanjing 211816China

The ability of carbon dots(CDs)to emit afterglow emission in addition to fluorescence in response to UV-to-visible excitation allows them to be a new class of luminescent *** compared with traditional organic or inorganic afterglow materials,CDs have a set of advantages,including small size,ease of synthesis,and absence of highly toxic metal *** addition,high dependence of their afterglow color output on temperature,excitation wavelength,and aggregation degrees adds remarkable flexibility in the creation of multimode luminescence of CDs without the need for changing their intrinsic *** characteristics make CDs particularly attractive in the fields of sensing,anticounterfeiting,and data *** this review,we first describe the general attributes of afterglow CDs and their fundamental afterglow *** then highlight recent strategic advances in the generation or activation of the afterglow luminescence of *** emphasis is placed on the summarization of their emergent afterglow properties in response to external *** further highlight the emerging applications of afterglow CDs on the basis of their unique optical features and present the key challenges needed to be addressed before the realization of their full practical utility.

关键词： mechanism excitation luminescence

PEM water electrolysis for hydrogen production:fundamentals,advances,and prospects

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Carbon Neutrality 2022年第1期1卷 323-341页

作者： Tongzhou Wang Xuejie Cao Lifang Jiao Key Laboratory of advanced Energy materials Chemistry(Ministry of Education) Renewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Hydrogen,as a clean energy carrier,is of great potential to be an alternative fuel in the *** exchange membrane(PEM)water electrolysis is hailed as the most desired technology for high purity hydrogen production and self-consistent with volatility of renewable energies,has ignited much attention in the past decades based on the high current density,greater energy efficiency,small mass-volume characteristic,easy handling and *** date,substantial efforts have been devoted to the development of advanced electrocatalysts to improve electrolytic efficiency and reduce the cost of PEM *** this review,we firstly compare the alkaline water electrolysis(AWE),solid oxide electrolysis(SOE),and PEM water electrolysis and highlight the advantages of PEM water ***,we summarize the recent progress in PEM water electrolysis including hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)electrocatalysts in the acidic *** also introduce other PEM cell components(including membrane electrode assembly,current collector,and bipolar plate).Finally,the current challenges and an outlook for the future development of PEM water electrolysis technology for application in future hydrogen production are provided.

关键词： PEM water electrolysis Hydrogen production hydrogen evolution reaction Oxygen evolution reaction

Insulin-resistance and depression cohort data mining to identify nutraceutical related DNA methylation biomarker for type 2 diabetes

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Genes & Diseases 2021年第5期8卷 669-676页

作者： Fengji Liang Yuan Quan Andong Wu Ying Chen Ruifeng Xu Yuexing Zhu Jianghui Xiong Lab of Epigenetics and advanced Health Technology SPACEnter Space Science and Technology InstituteShenzhenGuangdong Province518117PR China State Key Laboratory of Space Medicine fundamentals and Application China Astronaut Research and Training CenterBeijing100094PR China School of Computer Science and Technology Harbin Institute of Technology Shenzhen Graduate SchoolShenzhenGuangdong Province518055PR China

Insulin-resistance(IR)is one of the most important precursors of type 2 diabetes(T2D).Recent evidence suggests an association of depression with the onset of ***-lating evidence shows that depression and T2D share common biological origins,and DNA methylation examination might reveal the link between lifestyle,disease risk,and potential therapeutic targets for *** we hypothesize that integrative mining of IR and depression cohort data will facilitate predictive biomarkers identification for *** utilized a newly proposed method to extract gene-level information from probe level data on genome-wide DNA methylation *** identified a set of genes associated with IR and depression in clin-ical *** overlapping the IR-related nutraceutical-gene network with depression net-works,we identified a common subnetwork centered with Vitamin D Receptor(VDR)*** clinical validation of gene methylation set in a small cohort of T2D patients and controls was established using the Sequenome matrix-assisted laser desorption ionization-time flight mass spectrometry.A set of sites in the promoter regions of VDR showed a signifi-cant difference between T2D patients and *** a logistic regression model,the optimal prediction performance of these sites was AUC Z 0.902,and an odds ratio Z ***,monitoring the methylation status of specific VDR promoter region might help stratify the high-risk individuals who could potentially benefit from vitamin D dietary *** results highlight the link between IR and depression,and the DNA methyl-ation analysis might facilitate the search for their shared mechanisms in the etiology of T2D.

关键词： Depression DNA methylation Insulin resistance Nutraceuticals Type 2 Diabetes Vitamin D receptor

High-entropy intermetallics:from alloy design to structural and functional properties

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Rare Metals 2022年第6期41卷 1989-2001页

作者： Hang Wang Quan-Feng He Yong Yang Department of Mechanical Engineering City University of Hong KongHong Kong 999077China Department of materials Science and Engineering.City University of Hong Kong Hong Kong 999077China Department of advanced Design and System Engineering.City University of Hong Kong Hong Kong 999077China

Conventional intermetallics are strong but ***,multi-principal element intermetallics,also termed as high-entropy intermetallics(HEIs)in the recent high-entropy alloy literature,are strong but malleable,some of which even show appreciable ductility and fracture toughness at room *** this article,we provide a focused review on the recent researches on HEIs,from the fundamentals,such as the concept of HEIs,the formation rules to the structural and functional properties of *** results hitherto reported clearly show that the HEIs with distinct properties could be a promising material for future structural and functional applications.

关键词： Internetallics High-entropy alloys Phase formation Mechanical properties Functional properies

Revisiting traditional and modern trends in versatile 2D nanomaterials: Synthetic strategies, structural stability, and gas-sensing fundamentals

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Journal of advanced Ceramics 2023年第12期12卷 2149-2246页

作者： Mobashar Hassan Siwei Liu Zhiping Liang Shahid Hussain Junlin Liu Guiwu Liu Guanjun Qiao School of materials Science and Engineering Jiangsu UniversityZhenjiang 212013China

Two-dimensional nanomaterials(2DNMs)have attracted significant research interest due to their outstanding structural properties,which include unique electrical nanostructures,large surface areas,and high surface *** adaptable materials have outstanding physicochemical characteristics,making them useful in a variety of applications such as gas-sensing,electronics,energy storage,and *** research has been conducted in the pursuit of high performance room-temperature(RT)gas sensors with good selectivity,high sensitivity,long-term stability,and rapid response/recovery *** oxides,transition metal chalcogenides,MXenes,graphene,phosphorene,and boron nitride have all been discovered as 2DNMs with strong potential for gas *** review presents an in-depth analysis of current advances in 2DNM *** includes synthetic techniques,structural stabilities,gas-sensing mechanisms,critical performance parameters,and factors influencing gas-sensing capabilities of ***,the present study emphasizes structural engineering and optimization methodologies that improve gas-sensing *** also highlights current challenges and outlines future research directions in the domain of tailoring 2DNMs for advanced RT gas *** systematically designed comprehensive review article aims to provide readers with profound insights into gas detection,thereby inspiring the generation of innovative ideas to develop cutting-edge 2DNMs-based gas sensors.

关键词： 2D nanomaterials synthetic strategies structural stability gas-sensing mechanism

Field-assisted electrocatalysts spark sulfur redox kinetics:From fundamentals to applications

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Interdisciplinary materials 2023年第3期2卷 390-415页

作者： Hongtai Li Yanguang Li Liang Zhang Zhongwei Chen Xueliang Sun Institute of Functional Nano&Soft materials(FUNSOM) Soochow UniversitySuzhouChina Jiangsu Key Laboratory of advanced Negative Carbon Technologies Soochow UniversitySuzhouChina Department of Chemical Engineering Waterloo Institute for NanotechnologyUniversity of WaterlooWaterlooOntarioCanada Department of Mechanical and materials Engineering University of Western OntarioLondonOntarioCanada

The chief culprit impeding the commercialization of lithium–sulfur(Li–S)batteries is the parasitic shuttle effect and restricted redox kinetics of lithium polysulfides(LiPSs).To circumvent these key stumbling blocks,incorporating electrocatalysts with rational electronic structure modulation into sulfur cathode plays a decisive role in vitalizing the higher electrocatalytic activity to promote sulfur utilization *** the stereotype of contemporary electrocatalyst design kept on pretreatment,field-assisted electrocatalysts offer strategic advantages in dynamically controllable electrochemical reactions that might be thorny to regulate in conventional electrochemical ***,the highly interdisciplinary fieldassisted electrochemistry puzzles researchers for a fundamental understanding of the ambiguous correlations among electronic structure,surface adsorption properties,and catalytic *** this review,the mechanisms,functionality explorations,and advantages of field-assisted electrocatalysts including electric,magnetic,light,thermal,and strain fields in Li–S batteries have been *** demonstrating pioneering work for customized geometric configuration,energy band engineering,and optimal microenvironment arrangement in response to decreased activation energy and enriched reactant concentration for accelerated sulfur redox kinetics,cutting-edge insights into the holistic periscope of chargespin-orbital-lattice interplay between LiPSs and electrocatalysts are scrutinized,which aspires to advance the comprehensive understanding of the complex electrochemistry of Li–S ***,future perspectives are provided to inspire innovations capable of defeating existing restrictions.

关键词： electrocatalysis electronic properties external fields Li-S batteries redox kinetics

Recent advances and applications of single atom catalysts based electrochemical sensors

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Nano Research 2024年第4期17卷 2994-3013页

作者： Mingyue Wang Mingfu Ye Jieyue Wang Yong Xu Zhendong Wang Xinyue Tong Xinya Han Kui Zhang Wenhai Wang Konglin Wu Xianwen Wei Institute of Clean Energy and advanced Nanocatalysis(iClean) School of Chemistry and Chemical EngineeringAnhui University of TechnologyMaanshan 243002China School of materials Science and Engineering Anhui University of TechnologyMaanshan 243002China Anhui International Research Center of Energy materials green manufacturing and biotechnology School of Chemistry and Chemical EngineeringAnhui University of TechnologyMaanshan 243002China Carbon Cycle and Emission Control Research Center Low-Carbon Research InstituteAnhui University of TechnologyMaanshan 243002China

Single atom catalysts(SACs)have attracted considerable attention due to their unique structures and excellent catalytic performance,especially in the area of catalysis science and energy conversion and *** recent years,SACs have emerged as a new type of sensing material for constructing electrochemical sensors(ECSs),presenting excellent sensitivity,selectivity,and ***,we review the recent advances of SACs in electrochemical sensing and discuss the status quo of current SAC-based ***,the fundamentals of SAC-based ECSs are outlined,including the involved central metal atoms and various supports of SACs in this field,the detection mechanisms,and improving strategies of SAC-based ***,the important applications of SAC-based ECSs are listed and classified,covering the detection of reactive oxygen and nitrogen species,environmental pollutants,disease biomarkers,and ***,based on abundant reported cases,the current conundrums of SAC-based ECSs are summarized,and the prediction of their future developing trends is also put forward.

关键词： single atom catalysts(SACs) electrochemical sensors(ECSs) reactive oxygen and nitrogen species environmental pollutants disease biomarkers pharmaceuticals

Air-stability of sodium-based layered-oxide cathode materials

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Science China Chemistry 2022年第6期65卷 1076-1087页

作者： Hu-Rong Yao Lituo Zheng Sen Xin Yu-Guo Guo Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy materials College of Physics and EnergyFujian Normal UniversityFuzhou350117China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of ChemistryChinese Academy of Sciences(CAS)Beijing100190China Fujian Provincial Collaborative Innovation Center for advanced High-Field Superconducting materials and Engineering Fuzhou350117China University of Chinese Academy of Sciences Beijing100049China C Innovation Laboratory Contemporary Amperex Technology Ltd.(CATL)Ningde352100China

Sodium-ion batteries have the potential to be an alternative to lithium-ion batteries especially for applications such as large-scale grid energy storage. The development of suitable cathode materials is crucial to the commercialization of sodium-ion ***-based layered-type transition metal oxides are promising candidates as cathode materials as they offer decent energy density and are easy to be synthesized. Unfortunately, most layered oxides suffer from poor air-stability, which greatly increases the cost of manufacturing and handling. The air-sensitivity severely limits the development and commercial application of sodium-ion batteries. A review that summarizes the latest understanding and solutions of air-sensitivity is desired. In this review,the background and fundamentals of sodium-based layered-type cathode materials are presented, followed by a discussion on the latest research on air-sensitivity of these materials. The mechanism is complex and involves multiple chemical and physical reactions. Various strategies are shown to alleviate some of the corresponding problems and promote the feasible application of sodium-ion batteries, followed by an outlook on current and future research directions of air-stable cathode materials. It is believed that this review will provide insights for researchers to develop practically relevant materials for sodium-ion batteries.

关键词： sodium-ion batteries layered oxide cathodes air-sensitivity mechanism and strategies

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