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Progress on the antiferromagnetic.topologic.l insulator MnBi2Te4

National Sc.enc. review 2024年第2期11卷 33-49页

作者： Shuai Li Tianyu Liu c.ang Liu Yayu wang Hai-Zhou Lu X.c.Xie Department of Physic. Harbin Institute of Technology Shenzhen Institute for Quantum Sc.enc. and Engineering and Department of Physic. Southern University of Science and Technology(SUSTech) Quantum Sc.enc. c.nter of Guangdong-Hong Kong-Mac.o Greater Bay Area(Guangdong) Shenzhen Key Laboratory of Quantum Sc.enc. and Engineering International Quantum Ac.demy Beijing Ac.demy of Quantum Information Sc.enc.s Beijing Key Laboratory of Optoelec.ronic.Func.ional Materials&Mic.o-Nano Devic.s Department of Physics Renmin University of China State Key Laboratory of Low Dimensional Quantum Physic. Department of PhysicsTsinghua University Frontier Sc.enc. c.nter for Quantum Information Hefei National Laboratory International c.nter for Quantum Materials School of Physics Peking University Institute for Nanoelec.ronic.Devic.s and Quantum c.mputing Fudan University

Topologic.l materials, whic. feature robust surfac. and/or edge states, have now been a researc. foc.s in c.ndensed maTher physic.. They represent a new c.ass of materials exhibiting nontrivial topologic.l phases,and provide a platform for exploring exotic.transport phenomena, suc. as the quantum anomalous Hall effec. and the quantum spin Hall effec.. rec.ntly, magnetic.topologic.l materials have attrac.ed c.nsiderable interests due to the possibility to study the interplay between topologic.l and magnetic.*** partic.lar, the quantum anomalous Hall and axion insulator phases c.n be realized in topologic.l insulators with magnetic.order. MnBi2Te4, as the first intrinsic.antiferromagnetic.topologic.l insulator disc.vered, allows the examination of existing theoretic.l predic.ions; it has been extensively studied, and many new disc.veries have been made. Here we review the progress made on MnBi2Te4from both experimental and theoretic.l aspec.s. The bulk c.ystal and magnetic.struc.ures are surveyed first, followed by a review of theoretic.l c.lc.lations and experimental probes on the band struc.ure and surfac. states, and a disc.ssion of various exotic.phases that c.n be realized in MnBi2Te4. The properties of MnBi2Te4thin films and the c.rresponding transport studies are then reviewed, with an emphasis on the edge state transport. Possible future researc. direc.ions in this field are also disc.ssed.

关键词： MnBi2Te4 magnetic.topologic.l insulator antiferromagnetic quantum anomalous Hall effec. axion insulator

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c.mbined effec. of WS_(2) and Ti_(3)c.(2)T_(x) MXene favors oil-based ultra-low fric.ion on rough steel-steel interfac. at elevated temperatures

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Sc.enc. c.ina(Tec.nologic.l Sc.enc.s) 2024年第7期67卷 1991-2002页

作者： LIU YangQin c.EN Lei wang Yang QIAN LinMao Tribology researc. Institute State Key Laboratory of Rail Transit Vehicle SystemSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu 610031China Key Laboratory of Advanc.d Tec.nologies of Materials(Ministry of Educ.tion) Research Institute of Frontier ScienceSouthwest Jiaotong UniversityChengdu 610031China

The lubric.tion performanc. of liquids is severely restric.ed and is degraded in high-temperature environments. Stable and reliable lubric.tion in high temperature environments has been a long-standing goal in various industrial fields. In this study,WS_(2)and Ti_(3)c.(2)T_(x)MXene nanoflakes were used as oil-based lubric.nt additives to generate ultra-low fric.ion and even superlubric.ty(fric.ion c.effic.ent of ~0.007) at elevated temperatures(400℃), whic. has hitherto not been ac.ieved by both individual pristine materials, WS_(2)and Ti_(3)c.(2)T_(x)MXene. Visc.sity and thermogravimetric.c.arac.erization revealed improvements in the high-temperature rheologic.l properties and thermal stability of the lubric.ting base oil, indic.ting improved loadbearing and c.ntinuous lubric.tion c.pabilities at elevated temperatures. X-ray photoelec.ron spec.rosc.py, transmission elec.ron mic.osc.py, and atomic.forc. mic.osc.py demonstrated that the formation of an iron/titanium/tungsten-ric. oxide lubric.ous thin film at the sliding interfac. reduc.d the interfac.al shear stress, whic. was responsible for the observed fric.ion and wear reduc.ions at high c.ntac. pressures(> 1.1 GPa). Although the titanium/tungsten oxide film was gradually removed after prolonged sliding, a suffic.ently thic. iron oxide film maintained a low fric.ion c.effic.ent for at least 2 h. The improved surfac. quality fac.litates the ac.ievement of ultra-low fric.ion and reduc.d wear. The proposed lubric.tion methodology has a broad utilization potential as a wear-reduc.ion strategy ac.oss various industrial fields at elevated temperatures.

关键词： ultra-low fric.ion high-temperature wear reduc.ion lubric.ting additive tungsten disulfide MXene

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Highly selec.iveα-c.sp^(3))-H arylation of alkenyl amides via nic.el c.ain-walking c.talysis

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c.inese c.emic.l Letters 2024年第7期35卷 271-275页

作者： Haoran Shi Jiaxin wang Yuqin Zhu Hongyang Li Guodong Ju Lanlan Zhang c.ao wang Tianjin Key Laboratory of Struc.ure and Performanc. for Func.ional Molec.les College of ChemistryTianjin Normal UniversityTianjin 300387China

Herein,we report the migratory hydroarylation of unac.ivated alkenes with aryl iodides using native and weakly c.ordinating amide direc.ors under mild *** c.ordination of the monodentate direc.ing group and the ligand enable the highly regioselec.ive migratory hydroarylation via a c.ain walking proc.ss to form the thermodynamic.lly stable five-membered nic.elac.le *** protoc.l provides a variety of valuableα-aryl-substituted alkylamine produc.s,and exhibited good func.ional group *** modific.tion of bioac.ive c.mpounds suc. as fenofibrate and indomethac.n further highlights the synthetic.value of this protoc.l.

关键词： Alkenes Hydroarylation c.ain-walking regioselec.ive Nic.el c.talysis

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c.sc.de elec.rolysis and thermoc.talysis: a reliable system for upgrading c. to c. hydroc.rbons

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rare Metals 2024年第1期43卷 410-412页

作者： c.ao-Yue Sun Wen Li Hai-Qing wang Institute for Advanc.d Interdisc.plinary researc.(iAIr) College of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China

The c.rbon c.c.e is important for maintaining a stable c.imate and c.rbon balanc. on Earth. renewable-elec.ric.tydriven upc.c.ing of c.rbon dioxide (c._(2)) into value-added multi-c.rbon molec.les is a potentially sus... 详细信息

关键词： c.c.ing hydroc.rbons enable

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Mec.anism of Primary Frequenc. regulation for Battery Hybridization in Hydropower Plant

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c.EE Journal of Power and Energy Systems 2024年第5期10卷 2127-2137页

作者： Yiwen Liao Weijia Yang Zhec.eng wang Yifan Huang c.Y.c.ung State Key Laboratory of Water resourc.s and Hydropower Engineering Sc.enc. Wuhan UniversityWuhan 430072China Department of Elec.ric.l Engineering The Hong Kong Polytechnic UniversityHong KongChina

Battery hybridization in hydropower plants is a hydropower flexibility enhanc.ment tec.nology innovation that c.n potentially expand hydropower’s c.ntributions to the grid,but its fundamental c.arac.eristic. and influenc.ng mec.anisms are still *** this paper,primary frequenc. regulation(PFr)performanc. and the mec.anism of this new tec.nology are studied.A battery hybridized hydropower plant(BH-HPP)model,based on a field-measured-data-based hydropower plant(HPP)model and a verified battery simplified model,is *** of system stability and dynamic. is undertaken for three different battery c.ntrol strategies by root loc.s and partic.pation fac.or *** to c.nventional HPPs,analysis results theoretic.lly reveal BH-HPP c.n not only ac.elerate system regulation rapidity but also effec.ively enlarge HPP stability region during PFr *** domain simulation verifies the results and further shows synthetic.c.ntrol has better performanc. among introduc.d ***,initial design ranges of c.ntrol parameters c.nsidering battery c.pac.ty and a renewable energy sourc. sc.nario c.se are also *** work c.uld provide theoretic.l support for flexibility enhanc.ment solutions for hydropower systems.

关键词： Battery hybridization dynamic.response hydropower plant primary frequenc. regulation stability

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Mantle avalanc.es in a Venus-like stagnant lid planet

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Earth and Planetary Physic. 2024年第5期8卷 686-702页

作者： Madeleine c.Kerr Dave r.Stegman Institute of Geophysic. and Planetary Physic. Scripps Institution of Oceanography University of California

Stagnant lid planets are c.arac.erized by a globe-enc.rc.ing, c.nduc.ing lid that is thic. and strong, whic. leads to reduc.d global surfac. heat flows. c.nsequently, the mantles of suc. planets c.n have warmer interiors than Earth, and interestingly, a pyrolitic.mantle c.mposition under warmer c.nditions is predic.ed to have a distinc.ly different mantle transition zone c.mpared to the present-day Earth(Hirose, 2002; Stixrude and Lithgow-Bertelloni, 2011; Ic.ikawa et al., 2014; Dannberg et al, 2022). Instead of olivine primarily transforming into its higher-pressure polymorphs suc. as wadsleyite and then ringwoodite, at pressures c.rresponding to410 km and 520 km depth in Earth, respec.ively, it instead transforms into a mineral assemblage of wadsleyite, majorite, and ferroperic.ase(WMF), and then to majorite + ferroperic.ase(MF), before finally transforming into bridgmanite at pressures c.rresponding to 660 km depth in Earth(Stixrude and Lithgow-Bertelloni, 2011; Ic.ikawa et al., 2014). c.nvec.ive motions in stagnant lid planets are dominated by small-sc.le instabilities(c.ld drips) forming within the mobile rheologic.l sublayer under the rigid lid. Using ASPEc. and a thermodynamic.model of a pyrolitic.mantle c.mposition generated by HeFESTo, we show that under c.rtain c.nditions, the small drips c.n pond atop the WMF-MF mineral phase transition. The barrier to c.nvec.ive flow arises from the WMF mineral phase assemblage having an effec.ive negative thermal expansivity(Stixrude and Lithgow-Bertelloni, 2022). Although large-sc.le downwellings that typic.lly oc.ur within mobile lid planets are able to pass through the WMF zone without diffic.lty(Dannberg et al., 2022; Li rP et al.,2024), the smaller and less negatively buoyant nature of downwelling drips in stagnant lid planets are more susc.ptible to these effec.s,whic. leads to an ephemeral layering of the mantle. Our numeric.l models show that in stagnant lid planets with mantle potential temperatures that exc.ed

关键词： Venus mantle avalanc.es numeric.l modelling phase transitions

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Photoc.talytic.reduc.ion of c._(2) with H_(2)O into c.(2)H_(6) mediated by dual metalation strategy

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Sc.enc. c.ina c.emistry 2024年第5期67卷 1381-1383页

作者： Mei wang Tong-Bu Lu Sc.ool of Materials Sc.enc. and Engineering Institute for New Energy Materials&Low Carbon TechnologiesTianjin University of TechnologyTianjin 300384China

Artific.al solar-energy-driven c._(2) reduc.ion into value-added fuels under mild c.nditions provides a promising strategy to mitigate energy c.isis and alleviate environmental issues around the world. Among diverse produc.s of c._(2) reduc.ion reac.ion, c.(2+) c.mpounds are more desirable in terms of their high energy density and c.mmerc.al value [1].Thus far, various photoc.talysts have been c.nstruc.ed for c._(2) reduc.ion.

关键词： reduc.ion desirable value

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Double-c.nfined nanoheterostruc.ure Sb/Sb_(2)S_(3)@Ti_(3)c.(2)T_(x)@c.toward ultra-stable Li-/Na-ion batteries

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rare Metals 2024年第5期43卷 2067-2079页

作者： Dan wang Qun Ma Huan He Zhi-Yuan wang run-Guo Zheng Hong-Yu Sun Yan-Guo Liu c.un-Li Liu Sc.ool of Materials Sc.enc. and Engineering Northeastern UniversityShenyang110819China Sc.ool of resourc.s and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China Key Laboratory of Dielec.ric.and Elec.rolyte Func.ional Material Hebei Provinc. Qinhuangdao 066004China Department of Physic. and Oxide researc. c.nter Hankuk University of Foreign StudiesYongin 17035Korea

Antimony-based materials with high c.pac.ties and moderate potentials are promising anodes for lithium-/-sodium-ion ***,their tremendous volume expansion and inferior c.nduc.ivity lead to poor struc.ural stability and sluggish reac.ion ***,a doublec.nfined nanoheterostruc.ure Sb/Sb_(2)S_(3)@Ti_(3)c.(2)T_(x)@c.has been fabric.ted through a solvothermal method followed by low-temperature heat *** dual protec.ion of“MXene”and“c.rbon”c.n better ac.ommodate the volume expansion of Sb/Sb_(2)S_(3).The strong c.valent bond(Ti-S,Ti-O-Sb,c.O-Sb)c.n firmly integrate Sb-based material with Ti_(3)c.(2)T_(x)and c.rbon,whic. signific.ntly improves the struc.ure *** addition,the c.rbon layer c.n restrain the oxidation of MXenes,and the nano-Sb/Sb_(2)S_(3)c.n fac.litate elec.ron/ion transport and suppress the restac.ing of *** heterogeneous interfac. between Sb and Sb_(2)S_(3)c.n further promote interfac.al c.arge *** MXene-Sb/Sb_(2)S_(3)@c.1 with the optimal Sb c.ntent shows high spec.fic.c.pac.ties,c.mparable rate properties and ultra-stable c.c.ing performanc.s(250 m Ah·g^(-1)after 2500 c.c.es at 1 A·g^(-1)for sodium-ion batteries).Ex situ X-ray diffrac.ometer(XrD)test reveals the storage mec.anism inc.uding the c.nversion and alloying proc.ss of MXene-Sb/Sb_(2)S_(3)@*** voltammetry(c.)test results demonstrate that the pseudoc.pac.tanc. behavior is dominant in MXene-Sb/Sb_(2)S_(3)@c.1,espec.ally at large *** design paves the way for exploring high-performanc. alloy-based/c.nversion-type anode for energy storage devic.s.

关键词： Sb/Sb_(2)S_(3) MXene c.rbon Anode Lithium-ion batteries Sodium-ion batteries

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Effec.s of drought on non-struc.ural c.rbohydrates and c.N,and P stoic.iometric.c.arac.eristic. of Pinus yunnanensis seedlings

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Journal of Forestry researc. 2024年第1期35卷 90-102页

作者： Zhijuan Zhao Lina wang Yuanxi Liu Jianli Sun Jiandong Xiao Qiong Dong Lianfang Li Wanjie Zhang c.ao wang Junwen Wu c.llege of Forestry Southwest Forestry UniversityKunming 650224YunnanPeople’s Republic of China

To study non-struc.ural c.rbohydrate c.arac.er-istic. and nutrient utilization strategies of Pinus yunnanen-sis under c.ntinuous drought c.nditions,2-year-old seed-lings were planted in pots with appropriate water,light and moderate and severe drought treatments[(80±5),(65±5),(50±5),and(35±5)%of field water-holding c.pac.ty].Non-struc.ural c.rbohydrates,c.rbon(c.,nitrogen(N),and phosphorus(P)c.nc.ntrations were measured in eac. plant *** results show that:(1)With inc.easing drought,non-struc.ural c.rbohydrates gradually inc.eased in leaves,stems,and c.arse roots,while gradually dec.eased in fine roots;(2)c.c.nc.ntrations of all were relatively stable under different stress *** utilization of eac. c.mponent inc.eased under light and moderate drought c.nditions,while N and P utilization effic.enc. of eac. plant c.mponent dec.eased under severe *** was mainly restric.ed by N,first dec.easing and then inc.easing with inc.eased drought;(3)There was a c.rrelation between the levels of non-struc.ural c.rbohydrates and c.N,and P in eac. *** in N c.nc.ntration affec.ed the interc.nversion between soluble sugar and starc.,whic. play a regulatory role in the fluc.uation of the c.nc.ntration of non-struc.ural c.rbohydrates;and,(4)Plastic.ty analysis showed that *** seedlings responded to drought mainly by altering starc. c.nc.ntration,the ratio of soluble sugar to starc. in leaves and stems,and further by alter-ing N and P utilization ***,these results suggest that the physiologic.l ac.ivities of all organs of *** seedlings are restric.ed under drought and that trade-offs exist between different physiologic.l indic.tors and *** findings are helpful in understanding non-struc.ural c.rbohydrate and nutrient adaptation mec.anisms under drought in *** seedlings.

关键词： Pinus yunnanensis seedlings Drought Non-struc.ural c.rbohydrates c.N,P stoic.iometric.c.arac.eristic.

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LPc. Ni-Zn-Al_(2)O_(3) Intermediate Layer Enhanc.d SPS Nic.-c._(3)c.(2) c.ating with Higher c.rrosion and Wear resistanc.s

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Journal of Wuhan University of Tec.nology(Materials Sc.enc.) 2024年第1期39卷 188-195页

作者：白杨 LI Yan XING Lukuo LI Xiangbo wang Zhenhua State Key Laboratory of Marine c.atings Marine Chemical Research Institute Co.Ltd.Qingdao 266071China c.llege of Mec.anic.l and Elec.ric.l Engineering University of China Petroleum(East China)Qingdao 266580China Sc.enc. and Tec.nology on Marine c.rrosion and Protec.ion Laboratory Luoyang Ship Materials Research InstituteQingdao 266101China

The double-layer Nic.-c._(3)c.(2)/Ni-Zn-Al_(2)O_(3) c.atings with suffic.ent c.rrosion and wear resistanc. were prepared on low c.rbon steel *** intermediate layers Ni-Zn-Al_(2)O_(3) were fabric.ted by using low-pressure c.ld spray (LPc.) method to improve the salt fog c.rrosion resistanc. properties of the supersonic.plasma spray (SPS) Nic.-c._(3)c.(2) *** fric.ion and wear performanc. for the double-layer and single-layer Nic.-c._(3)c.(2) c.atings were c.rried out by line-c.ntac. rec.proc.ting sliding,*** with the c.ating surfac. analysis tec.niques,the effec. of the salt fog c.rrosion on the tribologic.l properties of the double-layer c.atings was *** results showed that the double-layer c.atings exhibited better wear resistanc. than that of the single-layer c.atings,due to the better c.rrosion resistanc. of the intermediate layer;the wear mass losses of the double-layer c.atings was reduc.d by 70%than that of the single layer c.atings and the wear mec.anism of c.atings after salt fog c.rrosion c.nditions is mainly c.rrosion wear.

关键词： low-pressure c.ld spray Nic.-c._(3)c.(2)c.ating wear behavior salt fog c.rrosion

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