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Regulated reaction pathway of CO2 photoreduction into CH4 by metal atom pair sites

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Rare Metals 2024年第9期43卷 4620-4627页

作者： Dong-po He Guang-Bing Huang Jun Hu Yang Wu Xiao-Dong Li Qing-Xia Chen Shan Zhu Wen-sheng Yan Jun-Fa Zhu Yang Pan Xing-Chen Jiao Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan University Hefei National Research Center for Physical Sciences at Microscale National Synchrotron Radiation LaboratoryUniversity of Science and Technology of China Max Planck Institute of Microstructure Physics State Grid Anhui Electric power Research Institute

The carbon dioxide （CO2） reduction process involves complex protonation, making the resulting product often unpredictable. To achieve the desired product, it is crucial to manipulate the reaction steps. Herein, we build the metal atom pair sites for selective CO2photoreduction into methane. As a prototype, Ni atom pair sites loaded on the Mo S2nanosheets were synthesized and verified by highresolution transmission electron microscopy （HRTEM）,X-ray photoelectron spectroscopy （XPS） and X-rayabsorption near edge structure spectra （XANES）. In-situ Fourier transform infrared spectroscopy （FTIR） monitors the*CHO group, a crucial intermediate in CH4production,during CO2photoreduction on the Ni-Mo S2nanosheets,whereas this monitoring is not observed for the Mo S2nanosheets. Also, theoretical calculations disclose that over the Ni-Mo S2nanosheet slab, the formation energy of*CHO intermediates is determined to be lower （0.585 e V） than the desorption energy of*CO intermediates for CO production（0.64 e V）, implying the higher selectivity of CH4production. Accordingly, the Ni-Mo S2nanosheets demonstrate a methane formation rate of 27.21μmol·g-1·h-1, coupled with an impressive electron selectivity of 94.2%.

关键词： Nanosheets

One-step calcination synthesis of interface-coherent crystallized and surface-passivated LiNi_(0.5)Mn_(1.5)O_(4) for high-voltage lithium-ion battery

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Nano Research 2024年第5期17卷 4192-4202页

作者： Min Xu Bifu sheng Yong Cheng Junjie Lu Minfeng Chen Peng Wang Bo Liu Jizhang Chen Xiang Han Ming-sheng Wang Siqi Shi College of Materials Science and Engineering Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing Forestry UniversityNanjing 210037China State Key Laboratory of Physical Chemistry of Solid Surfaces College of MaterialsXiamen UniversityXiamen 361005China College of Mathematics and Physics Jinggangshan UniversityJi’an 343009China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Western Digital Corporation 951 Sandisk DrMilpitasCA 95035USA

LiNi_(0.5)Mn_(1.5)O_(4)(LNMO)with a spinel crystal structure presents a compelling avenue towards the development of economic cobalt-free and high voltage(~5 V)lithium-ion ***,the elevated operational voltage of LNMO gives rise to pronounced interfacial interactions between the distorted surface lattices characterized by Jahn-Teller(J-T)distortions and the electrolyte ***,a localized crystallized coherent LaNiO_(3) and surface passivated Li_(3)po_(4) layer is deposited on LNMO via a one-step calcination *** evidenced by transmission electron microscopy(TEM),time-of-flight secondary ion mass spectrometry(ToF-SIMS)and density functional theory(DFT)calculation,the epitaxial growth of LaNiO_(3) along the LNMO lattice can effectively stabilize the structure and inhibit irreversible phase transitions,and the Li_(3)po_(4) surface coating can prevent the chemical reaction between HF and transition metals without sacrificing the electrochemical *** addition,the ionic conductive Li_(3)po_(4) and atomic wetting inter-layer enables fast charge transfer transport ***,the LNMO material enabled by the lattice bonding and surface passivating features,demonstrates high performance at high current densities and good capacity retention during long-term *** rational design of interface coherent engineering and surface coating layers of the LNMO cathode material offers a new perspective for the practical application of high-voltage lithium-ion batteries.

关键词： high-voltage cathode interface-coherent surface passivating electrochemical performance

Efficient capture of difluorocarbene by pyridinium 1,4-zwitterionic thiolates:A concise synthesis of difluoromethylene-containing 1,4-thiazine derivatives

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Chinese Chemical Letters 2024年第4期35卷 367-370页

作者： Zhiwei Chen Heyun sheng Xue Li Menghan Chen Xin Li Qiuling Song Institute of Next Generation Matter Transformation College of Materials Science&Engineering and College of Chemical Engineering at Huaqiao UniversityXiamen 361021China Fujian University Key Laboratory of Molecule Synthesis and Function Discovery College of ChemistryFuzhou UniversityFuzhou 350108China State Key Laboratory of Organometallic Chemistry and Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

A practical method for the construction of difluoromethylene-containing 1,4-thiazine moieties using readily available diethyl bromodifluoromethanephosphonate(BrCF_(2)po(OEt)_(2))as difluorocarbene precusor has been *** transformation features the efficient capture of difluorocarbene by pyridinium 1,4-zwitterionic thiolates.A series of structurally novel and functionalized difluoromethylene-containing 1,4-thiazine derivatives were thus synthesized in good yields.

关键词： Difluoromethylene Pyridinium 1 4-zwitterionic thiolates 1 4-Thiazine derivatives

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LeCMPSO算法求解异构无人机协同多任务重分配问题

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控制理论与应用 2024年第6期41卷 1009-1017页

作者：王峰付青坡韩孟臣邢立宁吴虎胜武汉大学计算机学院湖北武汉430072 国防科技大学系统工程学院湖南长沙410073 武警工程大学装备管理与保障学院陕西西安710086

无人机系统在军事领域有着广泛应用,由于战场环境复杂多变,无人机遭遇突发状况后需进行任务重分配.异构无人机是指多种类型的无人机,可完成单一无人机无法完成的多类型复杂任务,异构无人机协同多任务重分配问题约束条件复杂且包含混合变... 详细信息

无人机系统在军事领域有着广泛应用,由于战场环境复杂多变,无人机遭遇突发状况后需进行任务重分配.异构无人机是指多种类型的无人机,可完成单一无人机无法完成的多类型复杂任务,异构无人机协同多任务重分配问题约束条件复杂且包含混合变量,现有多目标优化算法不能有效处理此类问题.为高效求解上述问题,本文构建多约束异构无人机协同多任务重分配问题模型,提出一种学习引导的协同多目标粒子群优化算法(LeCMPSO),该算法引入基于先验知识的初始化策略和基于历史信息学习的粒子更新策略,能有效避免不可行解的产生并提升算法的搜索效率.通过在4组实例上的仿真实验表明,与其他典型的协同进化多目标优化算法相比,所提算法在解集的多样性、收敛性及搜索时间方面均具有较好的性能.

关键词：无人机多任务重分配粒子群优化算法多目标优化协同进化

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新能源汽车管理与服务关键技术研究综述

中国公路学报 2024年第3期37卷 82-97页

作者：王震坡张普琛孙逢春张照生刘鹏北京理工大学机械与车辆学院北京100081 北京电动车辆协同创新中心北京100081

随着新能源汽车的推广应用,车辆规模爆发式增长的同时,在新能源汽车的产品端、运行端以及服务端出现了一系列问题:产品质量监管成效低、运行安全管控不精准、公共服务管理不全面。这些问题影响着新能源汽车的安全可靠运行,制约着新能源... 详细信息

随着新能源汽车的推广应用,车辆规模爆发式增长的同时,在新能源汽车的产品端、运行端以及服务端出现了一系列问题:产品质量监管成效低、运行安全管控不精准、公共服务管理不全面。这些问题影响着新能源汽车的安全可靠运行,制约着新能源汽车产业的发展,已经成为了行业的痛点。在汽车数字化的时代背景下,以大数据为核心,推动新能源汽车管理与服务关键技术的发展,是实现新能源汽车安全可靠高效应用、消除消费者安全焦虑、推动产业跨越式发展的必要支撑和保障。为了较为全面地综述该领域的技术水平和创新成果,从新能源汽车质量测评和溯源技术、新能源汽车安全运行管控和充电服务技术、新能源汽车行为分析辨识和碳核算技术3方面详细论述新能源汽车管理与服务关键技术的研究现状,并重点介绍了“运行大数据+”的新能源汽车“质量监管-运行管控-服务管理”技术体系,最后对目前新能源汽车管理与服务关键技术在产品质量监管、运行安全管控以及公共服务管理等方面存在的问题进行总结,对以大数据分析和挖掘为核心的新能源汽车“质量监测-运行管控-服务管理”技术进行展望。该综述可为新能源汽车管理与服务相关技术的进一步提高提供借鉴,也可为未来该领域技术的发展方向提供参考。

关键词：汽车工程新能源汽车综述管理服务质量测评安全监管

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Clinicopathological characteristics and typing of multilocular cystic renal neoplasm of low malignant potential

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World Journal of Clinical Cases 2024年第14期12卷 2332-2341页

作者： Wen-Long Gao Gang Li Dong-sheng Zhu Yuan-Jie Niu Department of Urology The Second Hospital of Tianjin Medical UniversityTianjin 300211China Department of Pediatric Surgery The First People’s Hospital of LianyungangLianyungang 222000Jiangsu ProvinceChina

BACKGROUND Up until now,no research has been reported on the association between the cli-nical growth rate of multilocular cystic renal neoplasm of low malignant potential(MCRNLMP)and computed tomography(CT)imaging *** study sought to examine the correlation between them,with the objective of distin-guishing unique features of MCRNLMP from renal cysts and exploring effective management *** To investigate optimal management strategies of *** We retrospectively collected and analyzed data from 1520 patients,comprising 1444 with renal cysts and 76 with MCRNLMP,who underwent renal cyst decom-pression,radical nephrectomy,or nephron-sparing surgery for renal cystic disease between January 2013 and December 2021 at our *** of MC-RNLMP utilized the Bosniak classification for imaging and the 2016 World Health Organization criteria for clinical *** Our meticulous exploration has revealed compelling findings on the occurrence of ***,it comprises 1.48%of all cases involving simple renal cysts,5.26%of those with complex renal cysts,and a noteworthy 12.11%of renal tumors coexisting with renal cysts,indicating a statistically significant difference(P=0.001).Moreover,MCRNLMP constituted a significant 22.37%of the patient po-pulation whose cysts demonstrated a rapid growth rate of≥2.0 cm/year,whereas it only represented 0.66%among those with a growth rate below 2.0 cm/*** the 76 MCRNLMP cases studied,none of the nine patients who underwent subsequent nephron-sparing surgery or radical nephrectomy following renal cyst decompression experienced recurrence or *** the remaining 67 patients,who were actively monitored over a 3-year postoperative period,only one showed suspicious recurrence on CT *** MCRNLMP can be tentatively identified and categorized into three types based on CT scanning and growth rate *** treating MCRNLMP,partial nephrectomy is preferred,while rad

关键词： Renal cysts Multilocular cystic renal neoplasm of low malignant potential Computed tomography Diagnosis Treatment

Evolutionary mechanism and frequency response of graphite electrode at extreme temperatures

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Nano Research 2024年第8期17卷 7283-7289页

作者： Shanpeng Pei Zhiyong Zhang Xiuli Zhang Yan Liu Xiang Han Linshan Luo Pengfei Su Chaofei Lan Wei Huang Ziqi Zhang Ming-sheng Wang Songyan Chen Department of Physics Xiamen UniversityXiamen 361005China Shandong Electric power Engineering Consulting Institute Corporation Jinan 250031China State Key Lab of Physical Chemistry of Solid Surfaces College of MaterialsXiamen UniversityXiamen 361005China School of Semiconductor Science and Technology South China Normal UniversityFoshan 528225China College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037China National Key Laboratory of Integrated Circuits and Microsystems Chongqing 400000China

The battery management system is employed to monitor the external temperature of the lithium-ion battery in order to detect any potential ***,this outside–in detection method often suffers from a lag and is therefore unable to accurately predict the battery’s real-time ***,an inside–out frequency response approach is used to accurately monitor the battery’s state at various temperatures in real-time and correlate it with the solid electrolyte interphase(SEI)evolution of the graphite *** SEI evolution at temperatures of−15,25,60,and 90℃exhibits certain regular characteristics with temperature *** a temperature of−15℃,the Li^(+)-solvent interaction of lithium-ion slowed down,resulting in a significant reduction in *** 25℃,a LiF-rich inorganic SEI was identified as forming,which facilitated lithium-ion ***,high temperatures would induce decomposition of lithium hexafluorophosphate(LiPF_(6))and lithium-ion *** the extreme temperature of 90℃,the SEI would be organic-rich,and Li_(x)P_(y)F_(z),a decomposition product of lithium salts,was further oxidized to Li_(x)po_(y)F_(z),which led to a surge in the charge-transfer resistance at SEI(R_(sei))and a reduction in Coulombic efficiency(CE).This changing relationship can be recorded in real time from the inside out by electrochemical impedance spectroscopy(EIS)*** provides a new theoretical basis for the structural evolution of lithium-ion batteries and the regular characterization of EIS.

关键词： graphite electrode solid electrolyte interphase(SEI)film extreme temperatures frequency response evolutionary mechanism

聚醚酰亚胺纳米复合电介质中指数分布陷阱电荷跳跃输运对储能性能的影响

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物理学报 2024年第2期73卷 14-25页

作者：宋小凡闵道敏高梓巍王泊心郝予涛高景晖钟力生西安交通大学电力设备电气绝缘国家重点实验室西安710049

目前常见聚合物电介质电容器的储能性能在高温下会急剧劣化,难以满足航空航天和能源等领域的需求.为提高介质高温储能性能,常掺杂纳米填料对电介质改性,通过改变电介质内部陷阱参数来调控电荷输运过程,但其内部陷阱的能级和密度与储能... 详细信息

目前常见聚合物电介质电容器的储能性能在高温下会急剧劣化,难以满足航空航天和能源等领域的需求.为提高介质高温储能性能,常掺杂纳米填料对电介质改性,通过改变电介质内部陷阱参数来调控电荷输运过程,但其内部陷阱的能级和密度与储能性能间的定量关系仍需进一步研究.本文构建线性聚合物纳米复合电介质中指数分布陷阱电荷跳跃输运的储能与释能模型并进行了仿真.纯聚醚酰亚胺在150℃的体积电阻率和电位移矢量-电场强度回线的仿真结果与实验符合,证明了模型的有效性.不同陷阱参数纳米复合电介质的仿真结果表明,增大总陷阱密度和最深陷阱能级,会降低载流子迁移率、电流密度和电导损耗,提升放电能量密度和充放电效率.在150℃和550 kV/mm外施场强下,1.0 eV最深陷阱能级和1×10^(27) m^(-3)总陷阱密度的纳米复合电介质放电能量密度和充放电效率分别为4.26 J/cm^(3)和98.93%,相比纯聚醚酰亚胺提升率分别为91.09%和227.58%,显著提升了高温储能性能.本研究为耐高温高储能性能电容器的研发提供了理论和模型支撑.

关键词：陷阱能级和密度储能密度充放电效率纳米复合电介质

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Uncommon complication of nasoenteral feeding tube:A case report

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World Journal of Clinical Cases 2022年第5期10卷 1598-1601页

作者： Yong-po Jiang sheng Zhang Rong-Hai Lin Department of Critical care medicine Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical UniversityTaizhou 317000Zhejiang ProvinceChina

BACKGROUND The jejunal nutrition tube has increasingly been used in clinical practice,and the results in frequent *** SUMMARY We present the case of a 74-year-old male patient who had been admitted to the intensive care unit for aspiration pneumonia and respiratory *** confirming the position of the jejunal tube by X-ray,we found that the feeding tube had been placed into the *** complications was a disaster,though the misplacement of jejunal feeding tube are *** We introduced a way of ultrasound-guided jejunum feeding tube placement to avert the disaster,which was convenient and economical.

关键词： Nasoenteral feeding tube Nutritional support Complication Ultrasoundguided Feeding tube placement Case report