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A2B7-type La-Mg-Ni alloys prepared by Mg thermal diffusion for improved hydrogen storage performance

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Rare Metals 2024年第7期43卷 3260-3272页

作者： Yong-Xi Zhang Guan-Jiu Wu Jing Gu Hong-xing Kang Yuan li Di Zhou Wen-feng Wang Lu Zhang Shu-Min Han Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan University Department of Chemistry and Biochemistry San Diego State University State Key Laboratory of Metastable Materials Science and Technology Yanshan University

A novel approach based on thermal diffusion was used to achieve controllable Mg content in A2B7-type La-Mg-Ni-based *** formation mechanism of the A2B7-type phase as a result of the thermal diffusion process and the effect of Mg content on hydrogen storage performance were investigated.X-ray diffraction（XRD） patterns and Rietveld refinement results showed that increased Mg transformed the LaNi5phase in the La0.74Sm0.03Y0.23Ni4.32Al0.04precursor alloy into a superlattice *** electron microscopy（SEM） images showed that Mg was evenly distributed in the alloy *** in the superlattice significantly inhibited the phase decomposition of the superlattice structure during the hydrogen absorption/desorption *** A2B7-type La0.57Sm0.02Y0.18Mg0.23Ni3.38Al0.03alloy composed of Gd2co7and Ce2Ni7phases was successfully *** pressure-composition isotherm profiles showed that the alloy had a hydrogen storage capacity as high as 1.73 wt%,with good cycling *** 50 cycles of hydrogen absorption/desorption,the alloy retained a hydrogen storage capacity of 1.45 wt%,with a capacity retention rate of up to 84.28%.The Mg thermal diffusion process thus provides a new approach for the controlled preparation of La-Mg-Ni-based alloys.

关键词： La–Mg–Ni-based hydrogen storage alloy A 2 B 7 -type superlattice alloy Mg thermal diffusion process Phase transformation Hydrogen storage property

Progress and key challenges in catalytic combustion of lean methane

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Journal of Energy Chemistry 2022年第12期75卷 173-215,I0005页

作者： Xiangbo feng Lei Jiang Danyang li Shaopeng Tian xing Zhu Hua Wang Chi He Kongzhai li Xi’an Key Laboratory of Advanced Photoelectronics Materials and Energy conversion Device School of ScienceXijing UniversityXi’an 710123ShaanxiChina State Key Laboratory of complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunming 650093YunnanChina Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power EngineeringXi'an Jiaotong UniversityXi'an 710049ShaanxiChina National Engineering Laboratory for VOCs Pollution control Material&Technology University of Chinese Academy of SciencesBeijing 101408China

As a primary type of clean energy,methane is also the second most important greenhouse gas after co_(2)due to the high global warming *** quantities of lean methane(0.1–1.0 vol%)are emitted into the atmosphere without any treatment during coal mine,oil,and natural gas production,thus leading to energy loss and greenhouse *** general,it is challenging to utilize lean methane due to its low concentration and flow instability,while catalytic combustion is a vital pathway to realize an efficient utilization of lean methane owing to the reduced emissions of polluting gases(e.g.,NOxand co)during the *** particular,to efficiently convert lean methane,it necessitates both the designs of highly active and stable heterogeneous catalysts that accelerate lean methane combustion at low temperatures and smart reactors that enable autothermal operation by optimizing heat *** this review,we discuss the in-depth development,challenges,and prospects of catalytic lean methane combustion technology in various configurations,with particular emphasis on heat management from the point of view of material design combined with reactor *** target is to describe a framework that can correlate the guiding principles among catalyst design,device innovation and system optimization,inspiring the development of groundbreaking combustion technology for the efficient utilization of lean methane.

关键词： Lean methane combustion Catalyst design Heat management Reactor optimization Catalytic mechanism

Modifying Poly(propylene carbonate) with Furan-based Non-Isocyanate Polyurethanes

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Chinese Journal of Polymer Science 2023年第7期41卷 1069-1077页

作者： Xiao-Jing li Ying-feng Wen Yong Wang xing-Ping Zhou Xiao-lin Xie Key Laboratory for Material Chemistry of Energy conversion and Storage Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan430074China

Poly(propylene carbonate) (PPC) is gaining significant momentum as a biodegradable polymer using co_(2) as an abundant, low-cost and renewable feedstock. Yet, PPC suffers from unsatisfactory thermal and mechanical properties, and its blends with other synthetic polymers as the second component typically exhibit poor compatibility. Herein, novel furan-based non-isocyanate polyurethanes (NIPUs) with high molecular weights and narrow distributions have been synthesized starting from 5-hydroxymethylfurfural (HMF) via a four-step procedure including reduction, glycidylation, carbonation of co_(2) and step-growth polymerization with diamines. Owing to the structural similarity and intermolecular hydrogen bonding interactions, furan-based NIPUs display good compatibility with PPC. A sea-island morphology can be observed in SEM images of PPC/NIPU blends, where the NIPU phases are randomly dispersed in the PPC matrix. Moreover, the blends exhibit only one Tg (higher than both that of PPC and the corresponding NIPU) on the DSC curves, which first increase and then decrease when increasing the content of NIPUs from 0 wt% to 15 wt%. Notably, the physical crosslinking formed by hydrogen bonding interactions, coupled with the rigidity of furan rings, confer simultaneous improvements of elongation at the break and tensile strength, affording high-performance co_(2)-based biodegradable polymeric materials with low carbon footprint, good sustainability, and ideal biocompatibility.

关键词： PPC co_(2) NIPU HMF Blends

co_(2)-based Biodegradable Supramolecular Polymers with Well-tunable Adhesive Properties

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Chinese Journal of Polymer Science 2022年第1期40卷 47-55页

作者： Xiao-Jing li Ying-feng Wen Yong Wang Hai-Yan Peng xing-Ping Zhou Xiao-lin Xie Key Laboratory for Material Chemistry of Energy conversion and Storage Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Supramolecular adhesives that enable debonding on-demand are of significant research interest for the development of adaptive and smart materials,yet,biodegrable supramolecular adhesives have been rarely ***,telechelic,three-armed and four-armed co_(2)-based polyols with close molecular weights and various content(or carbonate unite content)have been synthesized via a zinc-cobalt double metal cyanide complex catalyzed ring-opening copolymerization of co_(2) and propylene oxide,and further exploited as sustainable and biodegradable building blocks for supramolecular polymers(SMPs)with 2-ureido-4[1H]-pyrimidinone(UPy)***,the orthogonal modulation of the co_(2) content and the topology of co_(2)-based polyols provide a unique opportunity to fine-tune the surface energy as well as the cohesive strength of the resulting co_(2)-based ***,a three-armed SMP with 44%co_(2)(3UPy-co_(2)-44%)can well balance the trade-off between surface energy and cohesive strength,therefore bestowing a high adhesive strength of 7.5 and 9.7 MPa towards stainless steel and wood substrates respectively by testing the corresponding single lap ***,the light-responsive adhesion property of 3UPy-co_(2)-44%has been demonstrated exemplarily by blending with a UV sensitizer.

关键词： Biodegradable polymer Adhesive co_(2)-based polyol ROcoP Supramolecular polymer

气相色谱-静电场轨道阱质谱在食品和药品分析中的研究进展

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药物分析杂志 2024年第1期44卷 1-10页

作者：吴炎培原文鹏胡新华聂黎行黄烈岩邢江涛于健东魏锋马双成中国食品药品检定研究院北京100050 深圳市人民医院(暨南大学第二临床医学院南方科技大学第一附属医院)药学部深圳518020 赛默飞世尔科技(中国)有限公司北京100013 国家药典委员会北京100061

气相色谱-静电场轨道阱质谱(gas chromatography-Orbitrap mass spectrometry,GC-Orbitrap/MS)作为新兴的高分辨气质联用技术,可实现挥发性成分的精确质量检测和高通量定性定量分析,具有灵敏度高,选择性强,线性动态范围宽等优点,能够很... 详细信息

气相色谱-静电场轨道阱质谱(gas chromatography-Orbitrap mass spectrometry,GC-Orbitrap/MS)作为新兴的高分辨气质联用技术,可实现挥发性成分的精确质量检测和高通量定性定量分析,具有灵敏度高,选择性强,线性动态范围宽等优点,能够很好地应对复杂基质中多种痕量物质分析带来的挑战,近年已开始应用于环境、工业、食品、制药、司法、临床等领域。本文对GC-Orbitrap/MS技术进行全面综述,阐述其基本原理及技术特点,介绍该技术在食品与药品分析研究中的应用进展,包括食品中农药残留检查、持久性有机物检测、香气物质分析和化学药品杂质分析与中药质量评价,并重点分析在超痕量成分测定和未知化合物鉴别方面的优势。最后,从高分辨率标准数据库的建立、可变电子电压技术的应用、样品前处理方式的选择开发与优化、二维GC-Orbitrap/MS串联等角度,提出GC-Orbitrap/MS未来发展方向并展望其应用前景。

关键词：气相色谱-静电场轨道阱质谱高分辨质谱食品药品农药残留持久性有机物香气物质杂质分析中药质量评价综述

Atomically-precise Janus polyoxometalate catalyst with tunable water splitting activity

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Science China Chemistry 2023年第6期66卷 1771-1780页

作者： Zhimin Wang xing Xin Zheng li Mo Zhang Jiangwei Zhang Yeqin feng Junhao Zhang Hongjin Lv Guo-Yu Yang MOE Key Laboratory of Cluster Science Beijing Key Laboratory of Photoelectroic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 102488China college of Chemistry and chemical Engineering Inner Mongolia UniversityHohhot 010021China

The development of bifunctional catalysts for solar-driven hydrogen and oxygen evolution has been regarded as a challenging but interesting research *** promising multi-electron-transfer catalysts,previously reported polyoxometalate(POM)-based catalysts often contain only a single type of transition metal substitution for driving either hydrogen production or oxygen ***,a viable two-step parental substitution approach has been developed to synthesize two structurally-new mixed-transition-metal-substituted polyoxometalates(mixed TMSPs),K_(6)Na_(4)[Mn_(2)Ni_(2)(H_(2)O)2(PW_(9)O_(34))2]·21H_(2)O({Mn_(2)Ni_(2)})and K10[Mn_(2)co_(2)(H_(2)O)2(PW_(9)O_(34))2]·35H_(2)O({Mn_(2)co_(2)}),using Na_(12)[Mn_(2)Na_(2)(PW_(9)O_(34))2]·36H_(2)O({Mn_(2)Na_(2)})as the *** results confirmed the nearly quantitative substitution of Na+with Ni_(2)+and co_(2+)ions.X-ray absorption fine structure(XAFS)spectroscopy revealed that the Mn atoms are preferentially located in the internal positions of the central belt while Ni and co atoms preferentially reside in the external,solvent-accessible *** from the second substitution of catalytically active transition metals,the resulting{Mn_(2)Ni_(2)}and{Mn_(2)co_(2)}can be utilized as Janus catalysts towards H_(2) evolution and O_(2) evolution under visible light irradiation with greatly-enhanced activity compared to that of parental{Mn_(2)Na_(2)}.The introduction of mixed transition metals into POM structures not only enriches the POMs family,but also provides an effective strategy to control electronic structures and catalytic properties of POM-based catalysts at the atomic level.

关键词： Janus polyoxometalate catalyst mixed-transition-metal substitution X-ray absorption fine structure(XAFS) H evolution O evolution

Electrolyte induced synergistic construction of cathode electrolyte interphase and capture of reactive free radicals for safer high energy density lithium-ion battery

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Journal of Energy Chemistry 2023年第12期87卷 207-214,I0006页

作者： Mengfei Ding Xuning feng Yong Peng Jing Jing Tong Bowen Hou Yalan xing Weifeng Zhang li Wang Yu Wu Jiabin Lv Chunyan Luo Dejun Xiong Shichao Zhang Minggao Ouyang School of Materials Science and Engineering Beihang UniversityBeijing 100191China State Key Laboratory of Intelligent Green Vehicle and Mobility Tsinghua UniversityBeijing 100084China School of Vehicle and Mobility Tsinghua UniversityBeijing 100084China School of Mechanical and Electronic control Engineering Beijing Jiaotong UniversityBeijing 100044China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Farasis Energy(GanZhou)co.Ltd GanZhou 341000JiangxiChina

As the energy density of battery increases rapidly,lithium-ion batteries(liBs)are facing serious safety issue with thermal runaway,which largely limits the large-scale applications of high-energy-density *** is generally agreed that the chemical crosstalk between the cathode and anode leads to thermal runaway of ***,a multifunctional high safety electrolyte is designed with synergistic construction of cathode electrolyte interphase and capture of reactive free radicals to limit the intrinsic pathway of thermal *** cathode electrolyte interphase not only resists the gas attack from the anode but suppresses the parasitic side reactions induced by *** the function of free radical capture has the ability of reducing heat release from thermal runaway of *** dual strategy improves the intrinsic safety of battery prominently that the triggering temperature of thermal runaway is increased by 24.4℃and the maximum temperature is reduced by 177.7℃.Simultaneously,the thermal runaway propagation in module can be ***,the electrolyte design balances the trade-off of electrochemical and safety performance of high-energy *** capacity retention of liNi_(0.8)co_(0.1)Mn_(0.1)O_(2)|graphite pouch cell has been significantly increased from 53.85%to 97.05%with higher coulombic efficiency of 99.94%at operating voltage extended up to 4.5 V for 200 ***,this work suggests a feasible strategy to mitigate the safety risk of high-energy-density liBs without sacrificing electrochemical performances.

关键词： lithium-ion battery Electrolyte Battery safety Thermal runaway

High thermoelectric and mechanical performance in the n-type polycrystalline SnSe incorporated with multi-walled carbon nanotubes

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Journal of Materials Science & Technology 2022年第19期114卷 55-61页

作者： Xin-Yu Mao Xiao-Lei Shi liang-Chuang Zhai Wei-Di liu Yue-xing Chen Han Gao Meng li De-Zhuang Wang Hao Wu Zhuang-Hao Zheng Yi-feng Wang Qingfeng liu Zhi-Gang Chen State Key Laboratory of Materials-Oriented chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Centre for Future Materials University of Southern QueenslandSpringfield CentralBrisbane4300Australia School of Chemistry and Physics Queensland University of TechnologyBrisbaneQLD 4000Australia Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbaneQLD 4072Australia Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Key Laboratory of Material Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China School of Mechanical and Mining Engineering The University of QueenslandSt LuciaBrisbaneQLD 4072Australia college of Materials Science and Engineering Nanjing Tech UniversityNanjing 211816China Jiangsu collaborative Innovation Center for Advanced Inorganic Function composites Nanjing Tech UniversityNanjing 211816China CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China

In this study,we introduce multi-walled carbon nanotubes(MWCNTs)in Pb/I co-doped n-type polycrys-tal SnSe to simultaneously improve its thermoelectric and mechanical properties for the first *** introduced MWCNTs act as the“bridges”to accelerate the electron carrier transport between SnSe grains,leading to significantly increased electrical conductivity from 32.6 to 45.7 S cm^(−1) at 773 K,which con-tributes to an enhanced power factor of∼5.0μW cm^(−1) K^(−2) at this *** MWCNTs possess high intrinsic thermal conductivities,these MWCNTs,acting as nanoinclusions in the SnSe matrix to form the dense interfaces between SnSe and MWCNTs,provide extra heat-carrying phonon scattering centers,leading to a slightly reduced lattice thermal conductivity of only 0.34 W m^(−1) K^(−2) at 773 K and in turn,a high ZT of∼1.0 at this ***,the introduced MWCNTs can simultane-ously act as the“binders”to bond adjacent grains,significantly improving the mechanical properties of SnSe by boosting its Vickers hardness from 39.5 to *** work indicates that our facile approach can achieve high thermoelectric and mechanical properties in n-type SnSe polycrystals with a considerable potential for applying to thermoelectric devices as n-type elements.

关键词： Thermoelectric property SnSe N-type Multi-walled carbon nanotubes Mechanical property

工业固体废弃物材料制作冷粘结人造轻骨料的研究进展

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材料导报 2023年第18期37卷 127-144页

作者：刘军李振林张伟卓靳贺松邢锋深圳大学土木与交通工程学院广东深圳518060 广东省滨海土木工程耐久性重点实验室广东深圳518060

利用固体废弃物制作的冷粘结轻质骨料作为新型环保材料,满足资源再利用和节约能源、减少环境污染以及可持续发展战略的要求,是设计环保型混凝土的主要研究方向和推广方向。目前,提高绿色人造轻质骨料混凝土性能的重要手段之一就是克服... 详细信息

利用固体废弃物制作的冷粘结轻质骨料作为新型环保材料,满足资源再利用和节约能源、减少环境污染以及可持续发展战略的要求,是设计环保型混凝土的主要研究方向和推广方向。目前,提高绿色人造轻质骨料混凝土性能的重要手段之一就是克服人造轻骨料的缺陷,如吸水率大、坚固性差、孔洞多、干裂等。现有利用固废制备的人造轻骨料性能提升方式主要从造粒工艺、养护制度着手,如co_(2)养护、烧结养护、挤压造粒等。同时通过调整固体废弃物材料种类、掺量也可以有效提升人造轻质骨料的性能。此外,借助不同的微观分析手段(如扫描电镜、水化热分析、热重分析、X射线分析等),并通过分析骨料力学性能、物理性能的影响因素,如化学组成、造粒设备参数等,也可以优化出有效提升人造骨料性能的方法,如纤维增强、碱性处理等。本文主要总结了工业固体废物的种类及造粒性能,综述了人造轻骨料的造粒方式、养护工艺、力学强度、物理性能和微观性能等研究进展,并指出了未来人造轻骨料的研究任务和完善方向。

关键词：人造轻骨料制备工艺力学性能物理性能微观性能环境影响