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Electron delocalization-enhanced sulfur reduction kinetics on an MXene-derived heterostructured electrocatalyst

Nano Research 2024年第8期17卷 7153-7162页

作者： Yunmeng Li Yinze zuo Xiang Li Yongzheng Zhang Cheng Ma Xiaomin Cheng Jian Wang Jitong Wang Hongzhen Lin Licheng Ling State Key Laboratory of Chemical Engineering Key Laboratory of Specially Functional Polymeric Materials and Related Technology(Ministry of Education)East China University of Science and TechnologyShanghai 200237China Institute of New Energy Materials and Engineering College of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China Key Laboratory of Specially Functional Polymeric Materials and Related Technology(Ministry of Education) School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China i-Lab&CAS Key Laboratory of Nanophotonic Materials and Device Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of SciencesSuzhou 215123China Helmholtz Institute Ulm(HIU) D89081 UlmGermany

Lithium-sulfur(Li-S)batteries mainly rely on the reversible electrochemical reaction of between lithium ions(Li^(+))and sulfur species to achieve energy storage and conversion,therefore,increasing the number of free Li^(+)and improving the Li^(+)diffusion kinetics will effectively enhance the cell ***,Mo-based MXene heterostructure(MoS_(2)@Mo_(2)C)was developed by partial vulcanization of Mo_(2)C MXene,in which the introduction of similar valence S into Mo-based MXene(Mo_(2)C)can create an electron delocalization *** theoretical simulations and electrochemical characterisation,it is demonstrated that the MoS_(2)@Mo_(2)C heterojunction can effectively promote ion desolvation,increase the amount of free Li^(+),and accelerate Li^(+)transport for more efficient polysulfide *** addition,the MoS_(2)@Mo_(2)C material is also capable of accelerating the oxidation and reduction of polysulfides through its sufficient defects and vacancies to further enhance the catalytic ***,the Li-S battery with the designed MoS_(2)@Mo_(2)C electrocatalyst performed for 500 cycles at 1 C and still maintained the ideal capacity(664.7 mAh·g^(−1)),and excellent rate performance(567.6 mAh·g^(−1)at 5 C).Under the extreme conditions of high loading,the cell maintained an excellent capacity of 775.6 mAh·g^(−1)after 100 *** also retained 838.4 mAh·g^(−1)for 70 cycles at a low temperature of 0℃,and demonstrated a low decay rate(0.063%).These results indicate that the delocalized electrons effectively accelerate the catalytic conversion of lithium polysulfide,which is more practical for enhancing the behaviour of Li-S batteries.

关键词： delocalized electron lithium sulfur batteries MXene-based heterostructures catalytic desolvation multi-catalytic sites

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2:17-type SmCo permanent magnets with controllable remanence temperature coefficients via substitution of heavy rare earth elements

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Rare Metals 2024年第8期43卷 3990-3996页

作者： Jia-Yi Huang Shu-Lan zuo Qi Zhang Hong-Yang Dai Lei Yang jing-Hua Liu Cheng-Bao Jiang Key Laboratory of Aerospace Materials and Performance(Ministry of Education) School of Materials Science and EngineeringBeihang UniversityBeijing 100191China

Permanent magnets that can maintain a constant magnetic flux over a wide temperature range are highly desirable in certain applications such as precision instruments.2:17-type SmCo permanent magnets are promising for such instruments owing to their excellent high-temperature magnetic properties that can be further manipulated byadding heavy rare earth elements (HREs).

关键词： magnets permanent earth

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Fe-N-C heterogeneous Fenton-like catalyst for the degradation of tetracycline:Fe-N coordination and mechanism studies

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Chinese Chemical Letters 2024年第9期35卷 309-314页

作者： Weichen Zhu Wei zuo Pu Wang Wei Zhan Jun Zhang Lipin Li Yu Tian Hong Qi Rui Huang State Key Laboratory of Urban Water Resource and Environment(SKLUWRE) School of EnvironmentHarbin Institute of TechnologyHarbin 150090China Guangdong Yuehai Water Investment Co. Ltd.Shenzhen 518021China National Engineering Research Center of Urban Water Resources Co. Ltd.Harbin Institute of TechnologyHarbin 150090China

Fe-N-C materials have received increasing attention,due to its distinctive catalytic ***,the Fe-N coordination number dependence of catalytic ability and mechanism for H_(2)O_(2)activation remain ***,a series of Fe-N-C heterogeneous Fenton-like catalysts with different Fe-N coordination number were prepared for tetracycline *** results demonstrated that samples with Fe-N4 structure exhibited high *** excellent performance was mainly ascribed to the high adsorption capacity and the formation of superoxide radicals(•O_(2)^(−))catalyzed by Fe linked to pyridinic *** intermediates and degradation pathways of tetracycline degradation by Fe-N-C/H_(2)O_(2)system were analyzed by liquid chromatography coupled to tandem mass spectrometry(LC-MS/MS).Furthermore,we applied our Fe-N-C catalysts to treat simulated pharmaceutical wastewater with high tetracycline degradation capacity despite high concentrations of organic matter such as oxalic acid and various ionic *** work reveals the dependence of the activation H_(2)O_(2)on the Fe-N coordination environment and the degradation mechanism of these *** provides insights into the prospects for tuning the catalyst in practical applications.

关键词： H_(2)O_(2)activation Advanced oxidation process Superoxide radicals Degradation pathways EXAFS

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Prevalence and Risk Factors of Stroke in Inpatients with Type 2 Diabetes Mellitus in China

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当代医学科学（英文） 2024年第4期44卷 698-706页

作者： zuo-ling XIE Chen-chen WANG Xi HUANG Zheng WANG Hai-yan SHANGGUAN Shao-hua WANG Department of Endocrinology the Affiliated ZhongDa Hospital of Southeast UniversityNanjing 210009China School of Medicine Southeast UniversityNanjing 210009China Department of Endocrinology the Affiliated ZhongDa Hospital of Southeast UniversityNanjing 210009China School of Medicine Southeast UniversityNanjing 210009China

Objective:The prevalence and the cluster characteristics of risk factors of stroke were assessed in a Chinese diabetic ***:Clinical data of 30 693 inpatients who were diagnosed with type 2 diabetes mellitus(T2DM)and admitted between 2013 and 2018 were retrospectively *** age-standardized prevalence of stroke was estimated using the 2010 Chinese population census data,and risk factors were analyzed by multiple imputation and ***:The crude and standardized prevalence rates of stroke in patients with T2DM were 34.4％and 21.5％,respectively,and 85.2％of the stroke patients had ischemic *** half of the patients who experienced stroke had clusters of more than 4 risk *** with no-risk-factor clustering,the risk of stroke significantly increased 3-4 times in the presence of more than 4 risk-factor clusters(P＜0.001).Hypertension was the most common major risk factor for ischemic stroke[odds ratio(OR),2.34;95％confidence interval(CI),2.18-2.50]and hemorrhagic stroke(OR,3.68;95％CI 2.95-4.59;P＜0.001).Moreover,a 1-standard-deviation increase in fasting blood glucose(FBG)was significantly negatively correlated with ischemic stroke risk,and the same change in FBG was significantly associated with an 8％increased risk of hemorrhagic ***:The prevalence of stroke in patients with T2DM is rather high,and the clustering of risk factors is associated with the development of stroke in T2DM *** factors differ in different stroke *** risk factors for a specific high-risk group is necessary.

关键词： cluster prevalence risk factor stroke type 2 diabetes mellitus

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980 nm Near-Infrared Light-Emitting Diode Using All-Inorganic Perovskite Nanocrystals Doped with Ytterbium Ions

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Tsinghua Science and Technology 2024年第1期29卷 207-215页

作者： Zhenglan Ye Taoran Liu Dan Chen Yazhou Yang Jiayi Li Yaqing Pang Xiangquan Liu Yuhua zuo Jun Zheng Zhi Liu Buwen Cheng State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Intelligent Network Research Institute Zhejiang LabHangzhou 311100China

All-inorganic perovskite(CsPbX3)nanocrystals(NCs)have recently been widely investigated as versatile solution-processable light-emitting *** to its wide-bandgap nature,the all-inorganic perovskite NC Light-Emitting Diode(LED)is limited to the visible region(400-700 nm).A particularly difficult challenge lies in the practical application of perovskite NCs in the infrared-spectrum *** this work,a 980 nm NIR all-inorganic perovskite NC LED is demonstrated,which is based on an efficient energy transfer from wide-bandgap materials(CsPbCl3 NCs)to ytterbium ions(Yb3+)as an NIR emitter doped in perovskite *** optimized CsPbCl3 NC with 15 mol%Yb3+doping concentration has the strongest 980 nm photoluminescence(PL)peak,with a PL quantum yield of 63%.An inverted perovskite NC LED is fabricated with the structure of ITO/PEDOT:PSS/poly-TPD/CsPbCl3:15 mol%Yb3+NCs/TPBi/LiF/*** LED has an External Quantum Efficiency(EQE)of 0.2%,a Full Width at Half Maximum(FWHM)of 47 nm,and a maximum luminescence of 182 cd/m?.The introduction of Yb3+doping in perovskite NCs makes it possible to expand its working wavelength to near-infrared band for next-generation light sources and shows potential applications for optoelectronic integration.

关键词： perovskite nanocrystals rare-earth doping Light-Emitting Diode(LED) near-infrared optical interconnection

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AGK2 pre-treatment protects against thioacetamide-induced acute liver failure via regulating the MFN2-PERK axis and ferroptosis signaling pathway

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Hepatobiliary & Pancreatic Diseases International 2024年第1期23卷 43-51页

作者： Qing-Qi Zhang Qian Chen Pan Cao Chun-Xia Shi Lu-Yi Zhang Lu-Wen Wang zuo-Jiong Gong Department of Infectious Diseases Renmin Hospital of Wuhan UniversityWuhan 430060China

Background:Acute liver failure(ALF)is an unpredictable and life-threatening critical *** pathological characteristic of ALF is massive necrosis of hepatocytes and lots of inflammatory cells infiltration which may lead to multiple organ ***:Animals were divided into 3 groups,normal,thioacetamide(TAA,ALF model)and TAA+*** L02 cells were divided into 5 groups,normal,TAA,TAA+mitofusin 2(MFN2)-siRNA,TAA+AGK2,and TAA+AGK2+MFN2-siRNA *** liver histology was evaluated with hematoxylin and eosin staining,inositol-requiring enzyme 1(IRE1),activating transcription factor 6β(ATF6β),protein kinase R(PKR)-like endoplasmic reticulum kinase(PERK)and phosphorylated-PERK(p-PERK).C/EBP homologous protein(CHOP),reactive oxygen species(ROS),MFN2 and glutathione peroxidase 4(GPX4)were measured with Western blotting,and cell viability and liver chemistry were also *** endoplasmic reticulum membranes(MAMs)were measured by ***:The liver tissue in the ALF group had massive inflammatory cell infiltration and hepatocytes necrosis,which were reduced by AGK2 *** comparison to the normal group,apoptosis rate and levels of IRE1,ATF6β,p-PERK,CHOP,ROS and Fe2+in the TAA-induced ALF model group were significantly increased,which were decreased by AGK2 *** levels of MFN2 and GPX4 were decreased in TAA-induced mice compared with the normal group,which were enhanced by AGK2 *** with the TAA-induced L02 cell,apoptosis rate and levels of IRE1,ATF6β,p-PERK,CHOP,ROS and Fe2+were further increased and levels of MFN2 and GPX4 were decreased in the MFN2-siRNA ***2 pre-treatment decreased the apoptosis rate and levels of IRE1,ATF6β,p-PERK,CHOP,ROS and Fe2+and enhanced the protein expression of MFN2 and GPX4 in MFN2-siRNA treated L02 *** observation showed that level of MAMs was promoted in the AGK2 pre-treatment group when compared with the TAA-induced gr

关键词： SIRT2 inhibitor AGK2 Acute liver failure MFN2 Ferroptosis

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数字新基建、要素市场化与中国制造业价值链升级

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技术经济与管理研究 2024年第7期 76-83页

作者：王正左文进上海财经大学浙江学院浙江金华321000

选取我国2012—2022年30个省级行政区面板数据,借助动态面板数据模型,实证检验数字新基建对制造业价值链升级的影响及作用机制。结果显示:数字新基建对制造业价值链升级具有显著正向影响,且该结论经过一系列内生性及稳健性检验后仍成立... 详细信息

选取我国2012—2022年30个省级行政区面板数据,借助动态面板数据模型,实证检验数字新基建对制造业价值链升级的影响及作用机制。结果显示:数字新基建对制造业价值链升级具有显著正向影响,且该结论经过一系列内生性及稳健性检验后仍成立。数字新基建对制造业价值链升级的促进作用存在显著区域异质性,具体表现为对东部地区省份、“一带一路”沿线省份制造业价值链升级的促进作用更强。进一步检验发现,数字新基建可通过推动要素市场化发展间接促进制造业价值链升级。基于此,应积极部署新一轮数字新基建项目,均衡分布数字新基建资源,有序推进要素市场化改革,以期推动中国制造业全球价值链向更高位势攀升。

关键词：数字新基建要素市场化制造业价值链升级

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数据要素配置、创新驱动与共同富裕

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技术经济与管理研究 2024年第1期 79-84页

作者：王正左文进上海财经大学浙江学院浙江金华321000

选取2012—2021年中国276个地级市面板数据,实证检验数据要素配置对共同富裕的影响,以及创新驱动在两者间的作用机制。研究结果表明:数据要素配置对共同富裕的正向影响效应十分显著;创新驱动在数据要素配置促进共同富裕的过程中发挥中... 详细信息

选取2012—2021年中国276个地级市面板数据,实证检验数据要素配置对共同富裕的影响,以及创新驱动在两者间的作用机制。研究结果表明:数据要素配置对共同富裕的正向影响效应十分显著;创新驱动在数据要素配置促进共同富裕的过程中发挥中介效应;数据要素配置对共同富裕的影响效应存在政策实施异质性和城市行政等级异质性;数据要素配置对共同富裕的促进作用存在双重门槛效应。基于此,提出加快数据要素市场化建设、深入落实创新发展战略、制定差异化数字要素配置策略等政策建议,以期为推动实现共同富裕提供新思路。

关键词：数据要素配置创新驱动共同富裕经济发展

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Analysis and Improvement of an Authentication Scheme for Fog Computing Services

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Wuhan University Journal of Natural Sciences 2024年第3期29卷 209-218页

作者： HUO Yuyan KANG Baoyuan NIU Shufang LI Anqian zuo Xinyu School of Software Tiangong UniversityTianjin 300387China School of Computer Science and Technology Tiangong UniversityTianjin 300387China

Fog computing utilizes devices in the edge network to transmit data with very low latency and supports high mobility. However, fog computing inherits security and privacy problems from cloud computing. Therefore, various privacy schemes for fog computing have been proposed to prevent different types of attacks. Recently, Weng et al proposed a fog computing authentication scheme;after analyzing, we found that Weng et al's scheme cannot resist user tracking attack and user impersonation attack. Then, we propose an improved scheme through adding a password, modifying the calculation method of Ei, and adding timestamps. In addition, we also compare the improved scheme with existing authentication schemes in terms of security and computational efficiency. The results show that the improved scheme is more secure and has less computation.

关键词： authentication scheme fog computing security

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Observation of Arctic surface currents using data from a surface drifting buoy

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Acta Oceanologica Sinica 2024年第1期43卷 70-79页

作者： Hongxia Chen Lina Lin Long Fan Wangxiao Yang Yinke Dou Bingrui Li Yan He Bin Kong Guangyu zuo Na Liu First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Laboratory for Regional Oceanography and Numerical Modeling Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Key Laboratory of Marine Science and Numerical Modeling Ministry of Natural ResourcesQingdao 266061China Naval Research Academy Tianjin 300061China College of Electrical and Power Engineering Taiyuan University of TechnologyTaiyuan 030024China Polar Research Institute of China Shanghai 443005China

During the 10th Chinese Arctic scientific expedition carried out in the summer of 2019,the surface current in the high-latitude areas of the Arctic Ocean was observed using a self-developed surface drifting buoy,which was initially deployed in the Chukchi *** buoy traversed the Chukchi Sea,Chukchi Abyssal Plain,Mendeleev Ridge,Makarov Basin,and Canada Basin over a period of 632 *** returning to the Mendeleev Ridge,it continued to drift toward the ***,the track of the buoy reflected the characteristics of the transpolar drift and Chukchi Slope Current,as well as the inertial flow,cross-ridge surface flow,and even the surface disorganized flow for some time *** results showed that:(1)the transpolar drift mainly occurs in the Chukchi Abyssal Plain,Mendeleev Ridge,and western Canada Basin to the east of the ridge where sea ice concentration is high,and the average northward flow velocity in the region between 79.41°N and 86.32°N was 5.1 cm/s;(2)the average surface velocity of the Chukchi Slope Current was 13.5 cm/s,and while this current moves westward along the continental slope,it also extends northwestward across the continental slope and flows to the deep sea;and(3)when sea ice concentration was less than 50%,the inertial flow was more significant(the maximum observed inertial flow was 26 cm/s,and the radius of the inertia circle was 3.6 km).

关键词： Chinese National Arctic Research Expedition(CHINARE) surface drifting buoy transpolar drift Chukchi Slope Current inertial flow

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