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Sn-doped cobalt containing perovskite as the air electrode for highly active and durable reversible protonic ceramic electrochemical cells

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Journal of Advanced Ceramics 2024年第1期13卷 63-72页

作者： Min Fu Wenjing Hu Hua Tong Xin Ling Linggui Tan fanglin Chen Zetian Tao School of Resources Environment and Safety EngineeringUniversity of South ChinaHengyang 421001China Department of Mechanical Engineering University of South CarolinaColumbia 29208USA

One potential solution to the problems of energy storage and conversion is the use of reversible protonic ceramic electrochemical cells(R-PCEC),which are based on the solid oxide fuel cell(SOFC)technology and offer a flexible route to the generation of renewable ***,the R-PCEC development faces a range of significant challenges,including slow oxygen reaction kinetics,inadequate durability,and poor round-trip efficiency resulting from the inadequacy of an air *** address these issues,we report novel B-sites doped Pr_(0.5)Ba_(0.5)Co_(0.7)Fe_(0.3)O_(3−δ)(PBCF)with varying amounts of Sn as the air electrode for R-PCEC to further enhance electrochemical performance at lower *** 600℃,R-PCEC with an air electrode consisting of Pr_(0.5)Ba_(0.5)Co_(0.7)Fe_(0.25)Sn_(0.05)O_(3+δ)has achieved peak power density of 1.1. W∙cm^(−2) in the fuel cell mode and current density of 1.79 A∙cm^(−2) in the electrolysis mode at a voltage of 1.3 ***,R-PCECs have shown good stability in the electrolysis mode of 1.0 *** study presents a practical method for developing durable high-performance air electrodes for R-PCECs.

关键词： triple conducting oxide dual-element doping protonic ceramic electrochemical cells(PCECs) catalytic

Enhancing Direct Electrochemical CO2 Electrolysis by Introducing A-Site Deficiency for the Dual-Phase Pr（Ca）Fe（Ni）O3-δ Cathode

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Energy & Environmental Materials 2024年第05期7卷 210-218页

作者： Wanhua Wang Haixia Li Ka-Young Park Taehee Lee Dong Ding fanglin Chen Department of Mechanical Engineering University of South Carolina Energy & Environmental Science and Technology Idaho National Laboratory

High-temperature CO2electrolysis via solid oxide electrolysis cells (CO2-SOECs) has drawn special attention due to the high energy convention efficiency,fast electrode kinetics,and great potential in carbon ***,the development of cathode materials with high catalytic activity and chemical stability for pure CO2electrolysis is still a great *** this work,A-site cation deficient dual-phase material,namely(Pr0.4Ca0.6)xFe0.8Ni0.2O3-δ（PCFN,x=1.0.95,and 0.9）,has been designed as the fuel electrode for a pure CO2-SOEC,which presents superior electrochemical *** all these compositions,(Pr0.4Ca0.6)0.95Fe0.8Ni0.2O3-δ（PCFN95） exhibited the lowest polarization resistance of 0.458Ωcm2at open-circuit voltage and 800℃.The application of PCFN95 as the cathode in a single cell yields an impressive electrolysis current density of 1.76 A cm-2at 1.5 V and 800℃,which is76%higher than that of single cells with stoichiometric Pr0.4Ca0.6Fe0.8Ni0.2O3-δ（PCFN1.0） *** effects of A-site deficiency on materials'phase structure and physicochemical properties are also systematically *** an enhancement in electrochemical performance is attributed to the promotion of effective CO2adsorption,as well as the improved electrode kinetics resulting from the A-site deficiency.

关键词： A-site deficiency cathode material CO2 adsorption direct CO2 electrolysis solid oxide electrolysis cells

Variation in the surface heat flux on the north and south slopes of Mount Qomolangma

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Atmospheric and Oceanic Science Letters 2024年第5期17卷 28-33页

作者： Yonghao Jiang Maoshan Li Yuchen Liu Ting Wang Pei Xu Yaoming Ma fanglin Sun School of Atmospheric Sciences/Plateau Atmosphere and Environment Key Laboratory of Sichuan Province/Chengdu Plain Urban Meteorology and Environment Observation and Research Station of Sichuan Province Chengdu University of Information TechnologyChengduChina Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchChinese Academy of SciencesCAS Center for Excellence in Tibetan Plateau Earth SciencesBeijingChina Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions Chinese Academy of SciencesLanzhouChina

The distinctive conditions present on the north and south slopes of Mount Qomolangma,along with the intricate variations in the underlying surfaces,result in notable variations in the surface energy flux patterns of the two *** this paper,data from TESEBS(Topographical Enhanced Surface Energy Balance System),remote sensing data from eight cloud-free scenarios,and observational data from nine stations are utilized to examine the fluctuations in the surface heat flux on both *** inclusion of MCD43A3 satellite data enhances the surface albedo,contributing to more accurate simulation *** model results are validated using observational *** RMSEs of the net radiation,ground heat,sensible heat,and latent heat flux are 40.73,1..09,33.26,and 30.91.W m^(−2),*** net radiation flux is greater on the south slope and exhibits a rapid decline from summer to *** to the influence of the monsoon,on the north slope,the maximum sensible heat flux occurs in the pre-monsoon period in summer and the maximum latent heat flux occurs during the *** south slope experiences the highest latent heat flux in *** dominant flux on the north slope is sensible heat,while it is latent heat on the south *** seasonal variations in the ground heat flux are more pronounced on the south slope than on the north *** in summer,the ground heat flux on the north slope surpasses that on the south slope.

关键词： Mount Qomolangma TESEBS model Remote sensing retrieval Surface heat fluxes

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Insight into the nitrogen-vacancy center formation in type-Ib diamond by irradiation and annealing approach

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Materials Futures 2024年第4期3卷 181-191页

作者： Taiqiao Liu fanglin Lyu Tian Shao Diwei Zou Wei Shen Yuzheng Guo Yuan Zhong Chaoyang Chen Liangchen Yi Zhaofu Zhang Andy H Shen The Institute of Technological Sciences Wuhan UniversityWuhan 430072People’s Republic of China Gemmological Institute China University of GeosciencesWuhan 430074People’s Republic of China School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072People’s Republic of China Zhongnan Diamond Company Nanyang 473264People’s Republic of China Hubei Key Laboratory of Electronic Manufacturing and Packaging Integration Wuhan UniversityWuhan 430072People’s Republic of China

Comprehending the microscopic formation of nitrogen vacancy(NV)centers in nitrogen-doped diamonds is crucial for enhancing the controllable preparation of NV centers and quantum *** followed by annealing simulations for a type-Ib diamond with a 900 ppm concentration of isolated nitrogen is conducted along different orientations and at different annealing *** these simulations,molecular dynamics(MD)with smoothly connected potential functions are *** simulations revealed the dynamic formation process of the NV center,which was subsequently verified by first-principles calculations and *** results indicate that vacancies undergo one or multiple migrations by exchanging sites with neighboring *** are three mechanisms for the formation of NV centers:direct irradiation-induced NV formation,irradiation with further annealing to form NV and vacancy migration(VM)during the annealing ***,the results show that both VM and NV center formations are affected by *** study clarifies the formation of NV centers across multiple scales and provides a solid foundation for the targeted preparation of NV centers.

关键词： diamond NV center irradiation annealing molecular dynamics

多尺度卷积结合Transformer的抑郁脑电分类研究

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西安电子科技大学学报 2024年第2期51卷 182-195页

作者：翟凤文孙芳林金静兰州交通大学电子与信息工程学院甘肃兰州730070

在通过深度学习模型进行抑郁症类脑电信号分析时,针对单一尺度的卷积存在特征提取不充分的问题和卷积神经网络在感知脑电信号全局依赖性方面的局限性,分别设计了多尺度动态卷积网络模块和门控Transformer编码器模块,并与时间卷积网络相... 详细信息

在通过深度学习模型进行抑郁症类脑电信号分析时,针对单一尺度的卷积存在特征提取不充分的问题和卷积神经网络在感知脑电信号全局依赖性方面的局限性,分别设计了多尺度动态卷积网络模块和门控Transformer编码器模块,并与时间卷积网络相结合,提出了混合网络模型(MGTTCNet)进行抑郁症患者和健康对照组的脑电信号分类。该模型首先通过多尺度动态卷积从空间域和频率域捕捉脑电信号的多尺度时频信息。其次通过门控Transformer编码器学习脑电信号中的全局依赖关系,其利用多头注意力机制有效增强网络表达相关脑电信号特征的能力。之后利用时间卷积网络提取脑电信号可用的时间特征,最后将提取的抽象特征输入到分类模块进行分类。在公开数据集MODMA上用留出法和十折交叉验证法对提出模型进行实验验证,分别取得了约98.51.和98.53%的分类准确率,相较于基线单尺度模型EEGNet,分类准确率分别提升了约1.89%和1.93%,F1.分别提升了约2.05%和2.08%,kappa系数值分别提高了约0.038 1.0.038 5;同时消融实验验证了文中设计的各个模块的有效性。

关键词：脑电信号抑郁分类深度学习 Transformer 时间卷积网络

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高校图书馆未来学习中心的空间场景建设——以粤港澳大湾区为例

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图书馆学研究 2024年第5期 42-52,117页

作者：龚蛟腾洪芳林湘潭大学公共管理学院图书馆湘潭大学公共管理学院

未来学习中心是一种新型基层学习组织,而未来学习中心空间通过赋权高等教育数字化转型、内涵式发展与创新性变革,彰显其业态创新价值。明晰未来学习中心空间场景建构的价值路径、理念趋向、特色案例与实现框架,有助于以空间业态的重塑... 详细信息

未来学习中心是一种新型基层学习组织,而未来学习中心空间通过赋权高等教育数字化转型、内涵式发展与创新性变革,彰显其业态创新价值。明晰未来学习中心空间场景建构的价值路径、理念趋向、特色案例与实现框架,有助于以空间业态的重塑推动高校图书馆的转型实践。采用实地调研、演绎归纳与案例分析方法,考察粤港澳大湾区代表性高校图书馆学习空间环境设计的整体方案,剖析香港教育大学图书馆“未来教室”的成功模式。大湾区高校图书馆高度重视以延展实境设计、技术嵌入空间、设备设施设计等环境营造举措赋能知识学习过程,形成了空间正义、灵活、分区、共同、包容、秩序、疗愈7大核心理念。高校图书馆应该从多元素养教育新情境、未来数字教育新空间和多维知识学习新场景维度构建未来学习中心空间服务框架。

关键词：高校图书馆未来学习中心空间建设教育赋权大湾区方案

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图书馆全面参与新型公共文化空间建设研究

图书馆建设 2024年第3期 80-92页

作者：洪芳林龚蛟腾湘潭大学公共管理学院湘潭大学图书馆

图书馆全面参与多元城乡新型公共文化空间服务供给,从场馆本体的场所形象感知走向更加泛在的文化场域认同,是公共文化服务体系下公共图书馆治理价值与事业效能的重要变革路向。通过质性分析方法编码39份典型新型公共文化空间政策文本话... 详细信息

图书馆全面参与多元城乡新型公共文化空间服务供给,从场馆本体的场所形象感知走向更加泛在的文化场域认同,是公共文化服务体系下公共图书馆治理价值与事业效能的重要变革路向。通过质性分析方法编码39份典型新型公共文化空间政策文本话语表达,归纳出的68个初始概念、7个基本范畴构成了以“建设主体、建设客体、建设过程与建设目标”为基本要素的图书馆全面参与新型公共文化空间建设政策环境框架。我国新型公共文化空间政策突出了普惠性非基本公共文化空间等创新点,强调了乡村公共文化空间建设等薄弱点,涵盖了公共文化空间治理过程的基本点,突出了各地方公共文化空间战略特色点。图书馆全面参与新型公共文化空间建设应该充分发挥自身优势,立足总分馆制体系扩大空间辐射范围,基于第三空间理论创新空间服务内容,依托评估定级工作完善空间评估体系以及根据管理服务标准创新空间治理运维。

关键词：公共文化空间图书馆政策环境建设策略

公共文化管理学科人才整体培养:必然逻辑、实然样态与应然进路

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情报资料工作 2024年第4期45卷 24-33页

作者：龚蛟腾洪芳林湘潭大学图书馆湖南411105 湘潭大学公共管理学院湖南411105

[目的/意义]整体推进公共文化管理专业人才培养工作,是促进信息资源管理学科各二级学科协同布局的关键动向与重点任务。[方法/过程]依循“固本兴新”思想和“整体性治理”理念,结合相关政策文件、案例数据和事实资料,演绎归纳公共文化... 详细信息

[目的/意义]整体推进公共文化管理专业人才培养工作,是促进信息资源管理学科各二级学科协同布局的关键动向与重点任务。[方法/过程]依循“固本兴新”思想和“整体性治理”理念,结合相关政策文件、案例数据和事实资料,演绎归纳公共文化管理学科人才整体培养的必然逻辑、实然样态与应然进路。[结果/结论]公共文化管理学科人才培育的历史演进、政策规划、理论应用、实践发展的整体逻辑,以及公共文化管理的研究样态、教育样态和事业样态共同表明,信息资源管理一级学科共同体为公共文化管理人才培养提供了坚实基础与最佳场域。公共文化管理教育教学机构应采取积极措施融合研究范式与职业场景、结合技术理性与人文理想、聚合核心素养与普适技能、配合传统模式与创新机制。

关键词：公共文化管理学科人才培养整体性治理信息资源管理

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Synergetic PVA degradation and H2 evolution in photocatalytic fuel cells using Ag@Fe_(2)O_(3) cathode

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Frontiers of Chemical Science and Engineering 2024年第1期18卷 85-93页

作者： Likun Sun Kesi Xiong Baoning Zhang Jinghong Fang Yingchao He Min Wang Zhixing Gan fanglin Du Qiong Sun Liyan Yu Lifeng Dong College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China Center for Future Optoelectronic Functional Materials School of Computer and Electronic InformationNanjing Normal UniversityNanjing 210023China Department of Physics Hamline UniversitySt.Paul 55104USA

In a dual-chamber photocatalytic fuel cell device,polyvinyl alcohol degradation and H2 evolution were concurrently *** setup involved commercial P25 as the photoanode and Ag@Fe_(2)O_(3) nanoparticles as the ***,the feasibility of a Fentonlike reaction in the cathode,utilizing Fe^(2+)ions and pumped O_(2),was *** cathode materials,polyvinyl alcohol types,and pH values’effects were assessed on device *** tests highlighted photoinduced holes(h+)and OH·radicals as pivotal contributions to polyvinyl alcohol ***-term stability of the device was established through cycling experiments.

关键词： photocatalytic fuel cell PVA Ag@Fe_(2)O_(3) cathode materials Fenton-like reaction