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co.relation between hydration properties and electrochemical performances on Ln cation size effect in layered perovskite for protonic ceramic fuel cells

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Journal of energy Chemistry 2024年第1期88卷 1-9,I0001页

作者： Inhyeok Cho Jiwon Yun Boseok Seong Junseok Kim Sun Hee Choi Ho-Il Ji Sihyuk Choi Department of Mechanical Engineering Kumoh National Institute of TechnologyGumi 39177GyeongbukRepublic of Korea Department of Aeronautics Mechanical and Electronic Convergence EngineeringKumoh National Institute of TechnologyGumi 39177GyeongbukRepublic of Korea Center for energy Materials research Korea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Center for Hydrogen and Fuel Cell research Clean Technology Research DivisionKorea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Department of energy and Environmental Engineering University of Science and TechnologySeoul 02792Republic of Korea Nanomaterials Science and Engineering Korea University of Science and Technology(UST)KIST CampusSeoul 02792Republic of Korea

PrBa_(0.5)Sr_(0.5)co.(1.5)Fe_(0.5)O_(5+δ)(PrBSCF) has attracted much research interest as a potential triple ionic and electronic co.ductor(TIEC) electrode for protonic ceramic fuel cells(PCFCs). The chemical formula for Pr BSCF is AA'B_(2)O_(5+δ), with Pr(A-site) and Ba/Sr(A'-site) alternately stacked along the c-axis. Due to these structural features, the bulk oxygen ion diffusivity is significantly enhanced through the disorder-free channels in the PrO layer;thus, the A site cations(lanthanide ions) play a pivotal role in determining the overall electrochemical properties of layered perovskites. co.sequently, previous research has predominantly focused on the electrical properties and oxygen bulk/surface kinetics of Ln cation effects,whereas the hydration properties for PCFC systems remain unidentified. Here, we thoroughly examined the proton uptake behavior and thermodynamic parameters for the hydration reaction to co.clusively determine the changes in the electrochemical performances depending on LnBa_(0.5)Sr_(0.5)co.(1.5)Fe_(0.5)O_(5+δ)(LnBSCF,Ln=Pr, Nd, and Gd) cathodes. At 500 ℃, the quantitative proton co.centration of PrBSCF was 2.04 mol% and progressively decreased as the Ln cation size decreased. Similarly, the Gibbs free energy indicated that less energy was required for the formation of protonic defects in the order of Pr BSCF < Nd BSCF < Gd BSCF. To elucidate the close relationship between hydration properties and electrochemical performances in LnBSCF cathodes, PCFC single cell measurements and analysis of the distribution of relaxation time were further investigated.

关键词： Protonic ceramic fuel cell Cathode Triple ionic and electronic co.ductor Hydration property Proton uptake Gibbs free energy

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Spatiotemporal drivers of urban water pollution:Assessment of 102 cities across the Yangtze River Basin

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Environmental Science and Eco.0} 2024年第4期20卷 300-314页

作者： Yi-Lin Zhao Han-Jun Sun Xiao-DanWang Jie Ding Mei-Yun Lu Ji-Wei Pang Da-Peng Zhou Ming Liang Nan-Qi Ren Shan-Shan Yang State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China China energy co.servation and Environmental Protection Group Beijing 100082China China energy co.servation and Environmental Protection Group CECEP Digital Technology Co.Ltd.Beijing 100089China China Railway Engineering Design and co.sulting Group co. Ltd.Beijing 100055China

Effective management of large basins necessitates pinpointing the spatial and temporal drivers of primary index exceedances and urban risk factors,offering crucial insights for basin ***,co.prehensive examinations of multiple pollutants within the Yangtze River Basin remain *** we introduce a pollution inventory for urban clusters surrounding the Yangtze River Basin,analyzing water quality data from 102 cities during *** assessed the exceedance rates for six pivotal indicators:dissolved oxygen(DO),ammonia nitrogen(NH_(3)-N),chemical oxygen demand(co.),biochemical oxygen demand(BOD),total phosphorus(TP),and the permanganate index(co._(Mn))for each *** random forest regression and SHapley Additive exPlanations(SHAP)analyses,we identified the spatiotemporal factors influencing these key *** results highlight agricultural activities as the primary co.tributors to the exceedance of all six indicators,thus pinpointing them as the leading pollution source in the ***,forest co.erage,livestock farming,chemical and pharmaceutical sectors,along with meteorological elements like precipitation and temperature,significantly impacted various indicators'***,we delineate five co.e urban risk co.ponents through principal co.ponent analysis,which are(1)anthropogenic and industrial activities,(2)agricultural practices and forest extent,(3)climatic variables,(4)livestock rearing,and(5)principal polluting *** cities were subsequently evaluated and categorized based on these risk co.ponents,inco.porating policy interventions and administrative performance within each *** co.prehensive analysis advocates for a customized strategy in addressing the discerned risk factors,especially for cities presenting elevated risk levels.

关键词： Basin management Primary indices Urban risk factors Yangtze river basin Local co.ditions

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Self-supported co.per-based gas diffusion electrodes improve the local co.(2)co.centration for efficient electrochemical co.(2)reduction

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Frontiers of Chemical Science and Engineering 2024年第3期18卷 51-62页

作者： Azeem Mustafa Bachirou Guene Lougou Yong Shuai Zhijiang Wang Haseeb-ur-Rehman Samia Razzaq Wei Wang Ruming Pan Jiupeng Zhao Key Laboratory of Aerospace Thermophysics of MIIT Harbin Institute of TechnologyHarbin150001China School of energy Science and Engineering Harbin Institute of TechnologyHarbin150001China MIIT Key Laboratory of Critical Materials technology for new energy co.version and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin150001China Mechanical Engineering Department University of Engineering and TechnologyTaxila47050Pakistan School of Aerospace Mechanical and Mechatronics EngineeringUniversity of SydneySydney2006Australia

Electrochemical co.(2)reduction is a sustainable approach in green chemistry that enables the production of valuable chemicals and fuels while mitigating the environmental impact associated with co.(2)*** its several advantages,this technology suffers from an intrinsically low co.(2)solubility in aqueous solutions,resulting in a lower local co.(2)co.centration near the electrode,which yields lower current densities and restricts product *** diffusion electrodes(GDEs),particularly those with tubular architectures,can solve these issues by increasing the local co.(2)co.centration and triple-phase interface,providing abundant electroactive sites to achieve superior reaction *** this study,robust and self-supported Cu flow-through gas diffusion electrodes(FTGDEs)were synthesized for efficient formate production via electrochemical co.(2)*** were further co.pared with traditional Cu electrodes,and it was found that higher local co.(2)co.centration due to improved mass transfer,the abundant surface area available for the generation of the triple-phase interface,and the porous structure of Cu FTGDEs enabled high formate Faradaic efficiency(76%)and current density(265 mA¸cm^(−2))at–0.9 V *** hydrogen electrode(RHE)in 0.5 mol·L^(−1)*** co.bined phase inversion and calcination process of the Cu FTGDEs helped maintain a stable operation for several *** catalytic performance of the Cu FTGDEs was further investigated in a non-gas diffusion co.figuration to demonstrate the impact of local gas co.centration on the activity and performance of electrochemical co.(2)*** study demonstrates the potential of flow-through gas-diffusion electrodes to enhance reaction kinetics for the highly efficient and selective reduction of co.(2),offering promising applications in sustainable electrochemical processes.

关键词： co.(2)electroreduction flow-through delivery hollow fiber structure local co.centration formate

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Enhancing Autonomy Capability in Regional Power Grids:A Strategic Planning Approach with Multiple Autonomous Evaluation Indexes

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energy Engineering 2024年第9期121卷 2449-2477页

作者： Jie Ma Tong Zhao Yuanzhao Hao Wenwen Qin Haozheng Yu Mingxuan Du Yuanhong Liu Liang Zhang Shixia Mu Cuiping Li Junhui Li Planning and Assessment Center Department State Grid Henan Economic Research InstituteZhengzhou450000China Key Laboratory of Modern Power System Simulation and co.trol&Renewable energy technology Ministry of EducationNortheast Electric Power UniversityJilin132012China Development Planning Department State Grid Henan Electric Power CompanyZhengzhou450000China Innovation Development research Center State Grid Shanghai Energy Internet Research Institute Co.Ltd.Shanghai201210China State Grid Simulation Center China Electric Power Research Institute Co.Ltd.Beijing100192China

After the integration of large-scale DistributedGeneration(DG)into the distribution network,the randomness and volatility of its output result in a reduction of spatiotemporal alignment between power generation and demand in the distribution network,exacerbating the phenomenon of wind and solar power *** a novel power system model,the fundamental co.cept of Regional Autonomous Power Grids(RAPGs)is to achieve localized management and energy autonomy,thereby facilitating the effective co.sumption of ***,this paper proposes a distributed resource planning strategy that enhances the autonomy capabilities of regional power grids by co.sidering multiple evaluation indexes for ***,a regional energy Storage(ES)co.figuration strategy is *** strategy can select a suitable reference value for the upper limit of ES co.figuration based on the regional load andDGoutput to maximize the elimination of source load deviations in the region as the upper limit co.straint of ES ***,a co.trol strategy for regional ES is proposed,the charging and discharging reference line of ES is set,and multiple autonomy and eco.omic indexes are used as objective functions to select different proportions of ES to co.trol the distributed resources of the regional power grid and establish evaluation indexes of the internal regional generation and load power ratio,the proportion of power supply matching hours,new energy co.sumption rate and tie line power imbalance outside the region to evaluate changes in the regional autonomy *** final simulation results showthat in the real regional grid example,the planning method in the planning year in the region of the overall power supply matching hour ratio and new energy co.sumption rate increased by 3.9%and 4.8%on average,and the power imbalance of the tie line decreased by 7.8%on *** proposed planning approach enables the maximization of regional autonomy while effectively smoothing the fluct

关键词： Regional autonomous power grid distributed generation distributed energy storage regional planning strategy evaluation index

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co.bustion mechanism of benzene in iron ore sintering process:experimental and simulation

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Journal of Iron and Steel research International 2024年第1期31卷 195-203页

作者： Zhi-gang Que Jin-ming Shi Xian-bin Ai institute of energy research Jiangxi Academy of ScienceNanchang330096JiangxiChina Jiangxi Carbon Neutralization research Center Nanchang330096JiangxiChina

Benzene is a typical co.ponent of volatile organic co.pounds(VOCs)in the iron ore sintering flue *** co.bustion behavior of benzene directly affects the emission of VOCs in iron ore sintering *** effects of temperature,benzene,and oxygen co.centrations on the co.version ratio of benzene were investigated by experiments and numerical *** experiments were carried out in a tube reactor at temperatures of 773-1098 K,benzene co.centrations of 0.01-0.03 vol.%,and oxygen co.centrations of 10-21 vol.%.The numerical simulation was performed with the plug flow model in the CHEMKIN program based on a kinetic model that co.sists of 132 chemical species and 772 elementary step-like *** experimental results reveal that increasing the temperature and benzene co.centration co.ld signifi-cantly promote benzene *** is attributed to the increase in the reaction rates of all steps in the pathway for forming co.(2)and H_(2)*** addition,due to the large equivalent ratio of oxygen to benzene,the co.version ratio of benzene remained co.stant at different oxygen *** simulation results were in good agreement with the experimental results and indicated that six elementary reactions dominated the formations of co.(2)and H_(2)*** oxidations of C_(6)H_(5)O,co.and C_(5)H_(4)O intermediates to co.(2)were the limiting steps in the reaction pathways.

关键词： Benzene Volatile organic co.pound Iron ore sinter co.bustion Simulation Temperature Oxygen

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Fabricating functionally graded Fe-Cr-co.permanent magnetic alloys via laser powder bed fusion

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Journal of Iron and Steel research International 2024年第3期31卷 729-737页

作者： Ya-zhou He Ya-qing Hou Peng Shen Hao Zhang Dong Zhou Hang Su Central Iron and Steel research institute co. Ltd.Beijing 100081China Material Digital R&D Center China Iron and Steel Research Institute Group Co.Ltd.Beijing 100081China

Laser powder bed fusion(LPBF)in-situ alloying technology offers the possibility to co.struct gradient materials with varied structures and *** graded Fe-Cr-co.permanent magnetic alloys were fabricated by LPBF and in-situ alloying mixed powders of Fe,Cr,and co.*** effects of different Fe,Cr and co.co.tents on the microstructure,magnetic properties and hardness of Fe-Cr-co.alloys prepared by LPBF were *** as-built Fe-Cr-co.alloys present a single body-centered-cubic phase and have a homogeneous distribution of *** mechanical properties and magnetic properties of the co.positionally graded sample show a gradient *** the increase in Cr co.tent,the Vickers hardness of the sample increases,and the saturation magnetization of the sample *** optimal magnetic properties in an isotropic state are given as co.rcivity HcB=21.65 kA/m,remanence Br=0.70 T and energy product(BH)_(max)=5.35 kJ/m^(3),which are co.parable to or higher than the reported magnetic properties in an isotropic state prepared by traditional powder *** in-situ alloying technology has the potential to further explore Fe-Cr-co.magnetic materials,such as those co.sisting of multiple or more co.stituent elements,and to maximize the co.positional flexibility of magnetic materials.

关键词： Fe-Cr-co.alloy Laser powder bed fusion In-situ alloying Functional material Magnetic property

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Generative deep-learning-embedded asynchronous structured light for three-dimensional imaging

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Advanced Photonics 2024年第4期6卷 45-58页

作者： Lei Lu Chenhao Bu Zhilong Su Banglei Guan Qifeng Yu Wei Pan Qinghui Zhang Henan University of technology College of Information Science and EngineeringZhengzhouChina Shanghai University Shanghai Institute of Applied Mathematics and MechanicsSchool of Mechanics and Engineering ScienceShanghai Key Laboratory of Mechanics in Energy EngineeringShanghaiChina Shaoxing research institute of Shanghai University ShaoxingChina National University of Defense technology College of Aerospace Science and EngineeringChangshaChina OPT Machine Vision Tech co. Ltd.Department of Research and DevelopmentDongguanChina

Three-dimensional(3D)imaging with structured light is crucial in diverse scenarios,ranging from intelligent manufacturing and medicine to ***,current structured light methods rely on projector-camera synchronization,limiting the use of affordable imaging devices and their co.sumer *** this work,we introduce an asynchronous structured light imaging approach based on generative deep neural networks to relax the synchronization co.straint,acco.plishing the challenges of fringe pattern aliasing,without relying on any a priori co.straint of the projection *** overco.e this need,we propose a generative deep neural network with U-Net-like enco.er-deco.er architecture to learn the underlying fringe features directly by exploring the intrinsic prior principles in the fringe pattern *** train within an adversarial learning framework and supervise the network training via a statisticsinformed loss *** demonstrate that by evaluating the performance on fields of intensity,phase,and 3D *** is shown that the trained network can separate aliased fringe patterns for producing co.parable results with the synchronous one:the absolute error is no greater than 8μm,and the standard deviation does not exceed 3μ*** results on multiple objects and pattern types show it co.ld be generalized for any asynchronous structured light scene.

关键词： structured light fringe pattern projection asynchrony deep learning generative neural networks three-dimensional imaging

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Particles attrition of binary mixtures in the co.l-fueled chemical looping system based on fluidized bed

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Particuology 2024年第3期86卷 281-290页

作者： Heyu Li Zhe Sun Yan Cao Guangzhou institute of energy co.version Chinese Academy of SciencesGuangzhou 510640China University of Chinese Academy of Sciences Bejing 100049China CAS Key Laboratory of Renewable energy Guangzhou 510640China Guangdong Provincial Key Laboratory of new and Renewable energy research and Development Guangzhou 510640China co.lege of Chemistry and Chemical Engineering Anhui UniversityHefei230601China

In this work,a reactive air jet attrition device with auto-reco.ding and co.lection of elutriated fines was *** established insights into the physiochemical interaction and further co.related attrition behaviors between char and oxygen carriers under various operation *** attrition rate increased by over 110% upon the introduced co.(2),which brought in the significant effect of thermo-chemical stress,similarly in effects of the increased char addition ratio and the decreased sizes of char or hematite in different *** the char-hematite co.attrition process,the elutriated carbon loss of char with poor mechanical strength was found to be over 10%,while the reactive iron loss of hematite was found to be 6.3%,and was enriched in elutriated *** reaction-derived thermochemical stress and the co.lision-derived mechanical stress jointly co.trols the particle attrition during the cyclic transformation of oxygen carrier particles in co.l-fueled chemical looping fluidization,especially sig-nificant in its reduction stage.

关键词： Attrition Binary species Chemical looping Oxygen carrier co.(2)capture

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A Temporary Frequency Response Strategy Using a Voltage Source-Based PermanentMagnet Synchronous Generator and energy Storage Systems

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energy Engineering 2024年第2期121卷 541-555页

作者： Baogang Chen Fenglin Miao Jing Yang Chen Qi Wenyan Ji CSIC HaiZhuangWindpower co. Ltd.Chongqing400000China State Key Laboratory of Operation and co.trol of Renewable energy&Storage Systems China Electric Power Research InstituteBeijing100000China

energy storage systems(ESS)and permanent magnet synchronous generators(PMSG)are speculated to be able to exhibit frequency regulation capabilities by adding differential and proportional co.trol loops with different co.trol *** available PMSG kinetic energy and charging/discharging capacities of the ESS were *** improve the inertia response and frequency co.trol capability,we propose a short-term frequency support strategy for the ESS and *** this end,the weights were embedded in the co.trol loops to adjust the participation of the differential and proportional co.trols based on the system frequency *** effectiveness of the proposed co.trol strategy was verified using PSCAD/*** simulations revealed that the proposed strategy co.ld improve the maximum rate of change of the frequency nadir and maximum frequency ***,it provides a promising solution of ancillary services for frequency regulation of PMSG and ESS.

关键词： Inertial co.trol PMSG ESS wind power generation frequency support

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Magnetic behaviors and magnetocaloric effects in rare earth high-entropy amorphous/nanocrystalline alloys

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Journal of Rare Earths 2024年第1期42卷 129-136,I0005页

作者： Lin Xue Liliang Shao Baosen Zhang Zongzhen Li Jiangbo Cheng Baolong Shen co.lege of Mechanics and Materials Hohai UniversityNanjing211106China School of Materials Science and Engineering Jiangsu Key Laboratory of Advanced Metallic MaterialsSoutheast UniversityNanjing211189China School of Materials Science and Engineering Nanjing Institute of TechnologyNanjing211167China Jiangsu JITRI Advanced energy Materials research institute co. Ltd.Changzhou213000China

Rare earth high-entropy alloys(RE-HEAs)exhibit great potential to be applied as refrigerants due to their good co.prehensive magnetocaloric *** this work,octary GdTbDyHoErTmco.l and GdTbDyHoErTmco.i RE-HEAs with amorphous/nanocrystalline structure exhibiting co.parable magnetocaloric effect were *** RE-HEAs show a seco.d-order magnetic phase transition in the temperature range of hydrogen *** to the co.plex magnetic interactions,a spin glasslike behavior at low temperatures is observed in the RE-HEAs.A superior magnetocaloric effect is obtained in the nanocrystalline GdTbDyHoErTmco.i high-entropy alloy that is multiphase attributed to a stronger magnetic exchange interaction when co.pared with the other that exhibits single amorphous *** heterogeneous microstructure,homogeneous chemical distributions are observed in the partially crystallized high-entropy *** addition,the magnetocaloric effect and magnetic transition behavior of rare earth medium-and high-entropy alloys,including the RE-HEAs in this study,are summarized and *** results in this work provide a helpful guide for the design of RE-HEAs for hydrogen liquefaction applications with excellent magnetocaloric effects.

关键词： Rare earths High-entropy alloy Metallic glass Magnetocaloric effect

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