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Identifying the dynamic behaviors in complete reconstruction of Co-based complex precatalysts during electrocatalytic oxygen evolution

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Journal of Energy Chemistry 2025年第1期100卷 226-233页

作者： Jingfang Zhang Danyang Wu Linke cai Youluan Lu Fanpeng Cheng Lijuan Shi Qun yi Yao Liu yi Huang Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology School of Chemical Engineering & Pharmacy Wuhan Institute of Technology Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of Education College of Chemistry Central China Normal University College of Materials Science and Engineering Fuzhou University

Transition metal-based nanomaterials have emerged as promising electrocatalysts for oxygen evolution reaction（OER）. Considerable research efforts have shown that self-reconstruction occurs on these nanomaterials under operating conditions of OER process. However, most of them undergo incomplete reconstruction with limited thickness of reconstruction layer, leading to low component utilization and arduous exploration of real catalytic mechanism. Herein, we identify the dynamic behaviors in complete reconstruction of Co-based complexes during OER. The hollow phytic acid（PA） cross-linked CoFe-based complex nanoboxes with porous nanowalls are designed because of their good electrolyte penetration and mass transport ability, in favor of the fast and complete reconstruction. A series of experiment characterizations demonstrate that the reconstruction process includes the fast substitution of PA by OH-to form Co（Fe）(OH)xand subsequent potential-driven oxidation to Co（Fe）OOH. The obtained CoFeOOH delivers a low overpotential of 290 mV at a current density of 10 mA cm-2and a long-term *** experiment results together with theory calculations reveal that the Fe incorporation can result in the electron rearrangement of reconstructed CoFeOOH and optimization of their electronic structure,accounting for the enhanced OER activity. The work provides new insights into complete reconstruction of metal-based complexes during OER and offers guidelines for rational design of high-performance electrocatalysts.

关键词： Oxygen evolution reaction

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我国现行社会保障体系的缺陷及其完善对策

江西财经大学学报 2011年第5期 66-71页

作者：项益才吴中宇华中科技大学社会学系湖北武汉430074 九江学院商学院江西九江332005

我国社会保障体系建设已经取得了显著成就,但受制度理念的制约,在其发展过程中也暴露出一些缺陷。社会保障的本质在于为人的生存和发展服务,我国社会保障体系设计应当突出"为人性"的理念。以反贫困和风险控制为基本任务,以促进公平为价... 详细信息

我国社会保障体系建设已经取得了显著成就,但受制度理念的制约,在其发展过程中也暴露出一些缺陷。社会保障的本质在于为人的生存和发展服务,我国社会保障体系设计应当突出"为人性"的理念。以反贫困和风险控制为基本任务,以促进公平为价值追求,以提升人的发展能力为核心要务,在此基础上加快解决城乡二元分治的社会保障结构问题,逐步实现城乡居民平等地享受社会保障。

关键词：社会保障制度建设保障机制

Influence of particle size on property of Ti-6Al-4V alloy prepared by high-velocity compaction

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Transactions of Nonferrous Metals Society of China 2013年第2期23卷 361-365页

作者：闫志巧陈峰蔡一湘尹健广州有色金属研究院粉末冶金研究所广州510650 中南大学粉末冶金国家重点实验室长沙410083

Three Ti-6Al-4V alloy powders with median diameters of 103, 66 and 44 pm, respectively, were pressed by high-velocity compaction （HVC） technology and then sintered in vacuum. The effects of particle sizes on forming as well as properties of sintered samples were investigated. The results show that fine powders are more difficult to press than coarse powders and its compact density is lower too. But the sintered density of fine powders is obviously higher than that of coarse powders. Compared with the powders with 103 and 66 ~un in diameter, the green density with 44 ~rn diameter powders is lower, which is 85.1% of theoretical density （TD） at an impact energy of 913 J. After sintering at 1300 ~C for 2,5 h, the sintered density of the compacts with 44 pm diameter powders is the highest, and reaches 98.2% of TD. Moreover, the sintered sample with 44 pan in diameter has the highest hardness and compressive strength, which are HV 354 and 1265 MPa, respectively.

关键词： Ti6Al4V high-velocity compaction (HVC) green density sintering

甲烷/二氧化碳多孔介质富燃部分氧化实验研究

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工程热物理学报 2017年第10期38卷 2269-2275页

作者：曾洪瑜王雨晴史翊翔蔡宁生清华大学热能工程系热科学与动力工程教育部重点实验室北京100084

本文采用多孔介质燃烧器对甲烷/二氧化碳富燃部分氧化开展实验研究,研究了燃料中CO_2添加量对于非催化部分氧化重整制取合成气的影响。当空气流量为5L/min时,调节入口CO_2/CH_4比例及当量比,确定了多孔介质富燃燃烧的稳定区间,测试了稳... 详细信息

本文采用多孔介质燃烧器对甲烷/二氧化碳富燃部分氧化开展实验研究,研究了燃料中CO_2添加量对于非催化部分氧化重整制取合成气的影响。当空气流量为5L/min时,调节入口CO_2/CH_4比例及当量比,确定了多孔介质富燃燃烧的稳定区间,测试了稳定工况下的温度分布和出口组分。当量比为1.3时,稳定工况下CO_2/CH_4可达到1.5。当量比为1.6,CO_2/CH_4为0.5时,燃料重整效率可达到47.7%。燃料中CO_2的加入可在一定程度上促进水气变换反应逆过程的进行,回收部分显热,提高燃料重整效率,同时可减少CO_2净排放。

关键词：多孔介质富燃部分氧化二氧化碳

Application of the improved dung beetle optimizer,muti-head attention and hybrid deep learning algorithms to groundwater depth prediction in the Ningxia area,China

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 18-23页

作者： Jiarui cai Bo Sun Huijun Wang yi Zheng Siyu Zhou Huixin Li Yanyan Huang Peishu Zong Collaborative Innovation Center on forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment ChangeNanjing University of Information Science and TechnologyNanjingChina Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiChina China Meteorological Administration Key Laboratory of Transportation MeteorologyNanjingChina Jiangsu Meteorological Observatory NanjingChina

Due to the lack of accurate data and complex parameterization,the prediction of groundwater depth is a chal-lenge for numerical *** learning can effectively solve this issue and has been proven useful in the prediction of groundwater depth in many *** this study,two new models are applied to the prediction of groundwater depth in the Ningxia area,*** two models combine the improved dung beetle optimizer(DBO)algorithm with two deep learning models:The Multi-head Attention-Convolution Neural Network-Long Short Term Memory networks(MH-CNN-LSTM)and the Multi-head Attention-Convolution Neural Network-Gated Recurrent Unit(MH-CNN-GRU).The models with DBO show better prediction performance,with larger R(correlation coefficient),RPD(residual prediction deviation),and lower RMSE(root-mean-square error).Com-pared with the models with the original DBO,the R and RPD of models with the improved DBO increase by over 1.5%,and the RMSE decreases by over 1.8%,indicating better prediction *** addition,compared with the multiple linear regression model,a traditional statistical model,deep learning models have better prediction performance.

关键词： Groundwater depth Multi-head attention Improved dung beetle optimizer CNN-LSTM CNN-GRU Ningxia

Spin-modulated near-infrared-Ⅰ emission in a xanthene-decorated Fe(Ⅱ) spin-crossover complex

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Science China Chemistry 2025年

作者： Cheng yi Duyong Chen Shihui Zhang Rui cai Chunying Duan yinshan Meng Tao Liu State Key Laboratory of Fine Chemicals Frontier Science Center for Smart Materials and Chemical Engineering School of Chemical Engineering Dalian University of Technology Instrumental Analysis Center Dalian University of Technology School of Chemistry Dalian University of Technology Liaoning Binhai Laboratory

Molecular materials showing synergetic coupling of near-infrared （NIR） fluorescence and spin-crossover （SCO） are promisingly applicable in in-vivo bioimaging,temperature sensing,and spintronic *** the related study faces formidable *** this work we graft the NIR fluorophore xanthene onto the dipyridyl substituted triazole ligand and construct a new Febased SCO material,{FeⅡ（ddxc-abpt）2[N（CN）2]2}(1,ddxc-abpt:（E）-4-(((3,5-di（pyridin-2-yl）-4H-1,2,4-triazol-4-yl)imino)methyl)-N,N-diethyl-2,3-dihydro-1H-xanthen-6-amine).Magnetic studies indicate that compound 1 exhibits thermally induced SCO property in both the solid and solution ***-temperature fluorescence emission spectra reveal a remarkable 7-fold increase in photoluminescence intensity upon the transition from the low-spin state at 110 K to the high-spin state at 280 K,which is the record of all reported coupled fluorescence-SCO ***-temperature ultraviolet-visible （UV-Vis）absorption spectra show a significant change in absorption intensity within the fluorescence emission window,consistent with the F?rster resonance energy transfer （FRET） ***-dependent density functional theory （TD-DFT） calculations demonstrate that the strong coupling is attributed to disrupted energy transfer between the xanthene fluorophore and high-spin *** work provides a feasible approach for expanding the synergetic SCO-fluorescence materials to the NIR-Iwavelength region,and hopefully contributes to the applications of tunable NIR-SCO molecule-based sensors and devices.

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Dissecting the cell microenvironment of ovarian endometrioma through single-cell RNA sequencing

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Science China Life Sciences 2025年第1期 116-129页

作者： Jiangpeng Wu Siyu Xia Wenting Ye Yan Sun Jing cai Fubing Yu Haiping Wen Xiuwei yi Taikang Li Mingwei Chen Jiayun Chen Ge Song Chuanbin Yang Yali Song Jigang Wang Department of Reproductive Medicine Dongguan Maternal and Child Health Care Hospital Department of Urology and Shenzhen Clinical Research Centre for GeriatricsShenzhen People's HospitalSouthern University of Science and Technology State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs Artemisinin Research Centerand Institute of Chinese Materia MedicaChina Academy of Chinese Medical Sciences Reproductive Medicine Center Foshan Women and Children Hospital State Key Laboratory of Antiviral Drugs School of PharmacyHenan University

Ovarian endometrioma（OE）, also known as “chocolate cysts,” is a cystic mass that develops in the ovaries due to endometriosis and is a common gynecological condition characterized by the growth of endometrial tissue outside the uterus, leading to symptoms such as dysmenorrhea, pelvic pain, and infertility. However, the precise molecular and cellular mechanisms driving this pathophysiology remain largely unknown, posing challenges for diagnosis and treatment. Here, we employed integrated single-cell transcriptomic profiling of over 52,000 individual cells from endometrial tissues of OE patients and healthy donors and identified twelve major cell populations. We identified notable alterations in cell type-specific proportions and molecular signatures associated with OE. Notably, the activation of IGFBP5+macrophages with pro-inflammatory properties, NK cell exhaustion, and aberrant proliferation of IQCG+and KLF2+epithelium are key features and may be the potential mechanisms underlying the pathogenesis of OE. Collectively, our data contribute to a better understanding of OE at the single cell level and may pave the way for the development of novel therapeutic strategies.

关键词： ovary high-throughput sequencing transcriptomics gene expression analysis ligand-receptor analysis

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扬州市苯作业人员血常规检查结果分析

工业卫生与职业病 2017年第2期43卷 100-103页

作者：李小琴程金霞毛一扬蔡翔扬州市疾病预防控制中心江苏扬州225001

目的了解扬州市苯作业人员的血常规状况,探讨不同年龄、行业、工龄、性别对苯作业人员血常规检查结果的影响。方法收集扬州市2014年3 003名苯作业人员的职业健康检查结果,对资料进行统计分析。结果 3 003名苯作业人员血常规异常检出率为... 详细信息

目的了解扬州市苯作业人员的血常规状况,探讨不同年龄、行业、工龄、性别对苯作业人员血常规检查结果的影响。方法收集扬州市2014年3 003名苯作业人员的职业健康检查结果,对资料进行统计分析。结果 3 003名苯作业人员血常规异常检出率为6.9%,WBC和中性粒细胞减少检出率分别为4.3%和5.2%。不同年龄、行业组苯作业人员血常规异常检出率比较,差异无统计学意义(P>0.05)。工龄≥10a组WBC的减少检出率高于工龄0.05)。化工行业男性组和女性组WBC减少检出率分别为5.2%和2.0%,男性组高于女性组,差异有统计学意义(P<0.01)。结论苯作业人员血常规异常主要表现为WBC和中性粒细胞的减少,工龄、性别对苯作业人员的血常规检查结果有一定的影响,应加强对苯作业人员的健康管理和防护,尤其是化工行业的男性员工。

关键词：苯血常规异常检出率

High-Performance Biodegradable PBAT/PPC Composite Film Through Reactive Compatibilizer

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Chinese Journal of Polymer Science 2023年第7期41卷 1051-1058页

作者： Feng-xiang Gao yi cai Shun-Jie Liu Xian-Hong Wang University of Science and Technology of China Hefei230026China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry CASChinese Academy of SciencesChangchun130022China

Poly(butylene adipate-co-terephthalate) (PBAT) is currently the largest commercial biodegradable plastics with good toughness and film forming properties, whereas, the inferior barrier and mechanical properties hinder its applications. Biodegradable poly(propylene carbonate) (PPC) with excellent barrier properties and high strength is a natural choice to address above issue. However, it is challenging to improve the compatibility of these two polymers. Herein, we prepared a reactive compatibilizer with double bond side group through terpolymerization of CO_(2)/propylene oxide/glycidyl methacrylate to enhance the properties of PBAT/PPC blends. Upon addition of 1 wt% compatibilizer, the PBAT/PPC blends (75/25, W/W) showed an increased water vapor barrier property changed from 424 g·m^(−2)·d^(−1) to 204 g·m^(−2)·d^(−1) compared to the control sample. Moreover, the tensile strength and elongation at break increased from 24.7 MPa to 30.3 MPa and from 858% to 1142%, respectively. The PBAT/PPC composite also displayed excellent biodegradability under composting conditions, as confirmed by the significantly decreased molecular weight. The present work provides an efficient way to barrier biodegradable film from PBAT of practical utilization.

关键词： Poly(butylene adipate-co-terephthalate) Poly(propylene carbonate) Reactive compatibilizer Barrier property Mechanical property