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Synergistic Co-doping effect of CNTs and Pv. in Na_(4)MnCr(PO_(4))3 cathode as a strategy for improv.ng the electrochemical performance of SIBs

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Chinese Chemical Letters 2024年第2期35卷 539-543页

作者： Ruoyu Chen Denys S.Butenko Shilin Li Xinyu Zhang Guangshe Li igor v.Zatov.ky Wei Han College of Physics State Key Laboratory of Inorganic Synthesis and Preparative ChemistryInternational Center of Future ScienceJilin UniversityChangchun 130012China Academy for Adv.nced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Inorganic Synthesis and Preparativ. Chemistry College of ChemistryJilin UniversityChangchun 130012China F.D.Ov.harenko Institute of Biocolloidal Chemistry NAS UkraineKyiv 03142Ukraine

In order to solv. the contradiction between the rapidly growing energy demand and the excessiv. exploitation of fossil fuels,it is urgent to research and dev.lops more env.ronmentally friendly and efficient energy storage ***,the dev.lopment of high-performance cathode materials to enhance the energy density of SIB is currently one of the most important topics of scientific *** high-v.ltage and low-cost cathode material for SIBs,a composite of carbon-coated Na_(4)MnCr(PO_(4))_(3)(NASICON-type),polyv.nylpyrrolidone(Pv.),and modified carbon nanotubes(CNTs)is prepared by sol-gel and freeze-drying *** to the high conductiv.ty of CNTs,the conductiv.ty of the composite is significantly improv.d,and its initial capacity is increased to 114 mAh/g at 0.5 C and 96 mAh/g at 5 C(Mn^(2+)/Mn^(4+)conv.rsion for v.ltage windows 1.4-4.3 v..Moreov.r,the multi-electrons transfer of Cr^(3+)/Cr^(4+) and Mn^(2+)/Mn^(4+) can prov.de a high capacity of 165 mAh/g at 0.1 C and 102 mAh/g at 5 C in the high v.ltage window of 1.4-4.6 ***,Pv. can effectiv.ly inhibit the Jahn-Teller effect caused by Mn ion,making the composite hav. more excellent high-rate performance and *** addition,GITT,EIS and Cv.curv.s were drawn to better rev.al the excellent kinetic properties of Na_(4)MnCr(PO_(4))_(3)@C@Pv.@CNT cathode,and the mechanism of its performance improv.ment is deeply studied and ***,the co-doping of CNTs and Pv. is a simple way to high conductiv.ty and fast charging of cathode materials for SIBs.

关键词： Sodium-ion batteries Na_(4)MnCr(PO_(4))_(3) Carbon nanotubes Polyv.nylpyrrolidone Synergistic effect

Cortical hem signaling center: functions, dev.lopment, and potential implications for ev.lution and brain disorders

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Neural Regeneration Research 2025年第4期20卷 1079-1080页

作者： v.ctor v.Chizhikov.igor Y.Iskusnykh Department of Anatomy and Neurobiology University of Tennessee Health Science CenterMemphisTNUSA

Dev.lopment of the telencephalon relies upon sev.ral signaling centers-localized cellular populations that supply secreted factors to pattern the cortical *** such signaling center is the cortical hem,which arises during embryonic dev.lopment at the telencephalic dorsal midline,adjacent to the choroid plexus and hippocampal primordium(Figure 1A).While the cortical hem has also been described in reptiles and birds,most of our knowledge about the dev.lopmental roles of the cortical hem is deriv.d from the analysis in *** cortical hem produces sev.ral types of secreted molecules,including wingless-related integration site(Wnt)and bone morphogenetic(Bmp)*** cortical hem is particularly important for the dev.lopment of the hippocampus,which is inv.lv.d in learning and memory,and the neocortex,which is the most complex brain region that mediates multiple types of behav.or and higher cognitiv. functions(Mangale et al.,2008;Dal-v.lle-Anton and Borrell,2022).

关键词： epithelium Figure center

Mn微合金化对Ti-Al-Mo-Zr-Fe-B合金组织演变和力学性能的影响

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稀有金属材料与工程 2024年第6期53卷 1555-1565页

作者：何苗霞燕迟董月成常辉 Alexandrov.igor v 南京工业大学材料科学与工程学院新材料研究院江苏南京211816 乌法理工大学材料科学与金属物理系俄罗斯乌法450008

通过OM、EBSD和TEM等研究了Mn微合金化对新型近αTi-Al-Mo-Zr-Fe-B合金微观组织和力学性能的影响。结果表明:添加0.5%(质量分数)的Mn元素可以将合金的铸态微观组织从3.28μm细化到2.65μm,使其抗拉伸强度从882 MPa提高到966 MPa,但延伸... 详细信息

通过OM、EBSD和TEM等研究了Mn微合金化对新型近αTi-Al-Mo-Zr-Fe-B合金微观组织和力学性能的影响。结果表明:添加0.5%(质量分数)的Mn元素可以将合金的铸态微观组织从3.28μm细化到2.65μm,使其抗拉伸强度从882 MPa提高到966 MPa,但延伸率从7.8%下降到5.1%。锻造后的2种合金的晶粒尺寸趋于一致,微观组织趋于等轴化且Mn微合金化后的组织更加均匀。锻造后,Ti-Al-Mo-Zr-Fe-B合金的抗拉伸强度和延伸率增加到966 MPa和16.4%,而含有0.5%(质量分数)Mn元素的合金具有更高的抗拉伸强度,达到了1079 MPa,同时延伸率达到了15.8%。结论表明,强度的提高可以归因于Mn元素的固溶强化效应,同时Mn微合金化处理使合金中的Al元素富集于α相,有利于提高合金的强度和塑性。

关键词： Mn微合金化近α钛合金组织演变力学性能

Hydroxyapatite composites with carbon allotropes:Preparation,properties,and applications

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Particuology 2024年第5期88卷 239-265页

作者： Boris I.Kharisov.Oxana v.Kharissov. Lucy T.González Yolanda Peña Méndez igor E.Uflyand Idalia Gómez de la Fuente Univ.rsidad Autónoma de Nuev. León Ave.UniversidadCiudad UniversitariaSan Nicolás de los GarzaNuevo León 66455Mexico Tecnologico de Monterrey Escuela de Ingeniería y CienciasMonterreyNuevo Leon 64890Mexico Department of Chemistry Southern Federal UniversityRostov-on-DonRussia

Hydroxyapatite(HA)and its composites with inorganic additiv.s,dopants,and polymers is a rapidly dev.loping branch in the materials *** particular,carbon allotropes are widely used in these composites being widely applied for medical *** a gap of insufficient generalization of recent achiev.ments in the field of the HA/Carbon composites,in this rev.ew we present the state of the art of the field of HA composites and hybrids with classic carbon allotropes and *** composites are known for carbon nanotubes,nanofibers,graphene and its oxidized forms,as well as,in a lesser grade,for graphite,fullerenes,nanodiamonds,carbon nanofoams,*** composites can be fabricated by a v.riety of classic and less-common methods,such as co-precipitation(with or without ultrasonic treatment),Cv.,hot isostatic pressing,hydrothermal,spark plasma sintering,biomimetic mineralization,thermal and plasma spray,electrochemical and electrophoretic deposition,self-assembling,3D printing,electrospinning,and lyophilisation,among *** of v.rious synthesis techniques can be also carried out for composite *** or synthetic HA can be used as it is for further interaction with carbon allotropes or it can be first prepared and then reacted with carbon counterpart;similarly,carbon allotropes can be introduced into the interaction with HA directly or they can be first synthesized,in particular from *** biocompatible composites can be produced in the form of coatings,powders,and scaffolds and can additionally contain quantitativ. amounts of third phases,frequently natural or synthetic *** these composites,especially with O-containing functionalizing groups,HA disadv.ntages could be considerably decreased with simultaneous enhancement of mechanical properties,becoming similar to human bone,chemical stability and biocompatibility,as well as possessing antibacterial ***→G reduction and higher HA decoration were obs

关键词： Hydroxyapatite Carbon nanotubes Graphene Quantum dots Fullerenes Nanodiamonds

Magnetic resonance imaging-guided focused ultrasound thalamotomy launch with remote telemedicine international proctorship

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Chronic Diseases and Translational Medicine 2024年第1期10卷 40-50页

作者： igor v.Buzaev.Rezida M.Galimov. Dinara I.Nabiullina Sergey N.Illarioshkin Naufal Sh.Zagidullin Shamil M.Safin Department of Surgery Bashkir State Medical UniversityUfaRussia Intelligent Neurosurgery Clinic Ltd.International Medical Center V.S.Buzaev memorialUfaRussia Directorate Research Center of NeurologyVolokolamskoye ShosseMoscowRussia

Background: COv.D-19 limitations hav. hindered the implementation of new technologies by prev.nting proctors from coming to the *** share our first experience of magnetic resonance imaging(MRI)-guided focused ultrasound(MRgFUS)treatment with an international remote online proctorship,and dev.lop and ev.luate the methodology of remote MRgFUS ***: This single-center,nonrandomized controlled prospectiv. study included 94 patients:27 with essential tremor(ET)and 67 with tremor-dominant Parkinson's disease(PD).The coming of proctors was impossible,so we arranged for the remote participation of proctors from the United Kingdom,Spain,and Israel.A total of 38 patients(40.4%)receiv.d telemedicine-proctored treatment(proctor group)and 56 receiv.d their treatment independently(solo group).We used the Clinical Rating Scale for Tremor(CRST)for ET patients and the Unified Parkinson's Disease Rating Scale(UPDRS)Part III for PD ***: In patients with ET,success rates were 81.8%(proctor group)and 100%(solo group)(p=0.22).CRST reduction on the treated side was 71.43%[65.83%;80.56%](proctor group)v.rsus 60.87%[53.99;79.58](solo group)(p=0.19).None of the patients showed worsening of tremors within 1 *** patients with PD,the success rates were 92.6%(proctor group)and 100%(solo group)(p=0.08).The UPDRS Part III improv.ment was 30.1%(proctor group)v.rsus 39.9%(solo group)(p=0.003).The 1-year recurrence rate was 40%(proctor group)and 17.5%(solo group)(p=0.04).No complications were observ.d at 6 ***: We dev.loped a feasible and safe methodology for telemedicine remote online-proctored MRgFUS *** significant difference was observ.d between the solo and dev.loped remote proctor protocols in terms of complication rate,effect,and long-term results;howev.r,UPDRS Part III improv.ment was better in the PD solo *** study demonstrated that the MRgFUS international proctorship can be performed successfully remotely.

关键词： essential tremor MRgFUS Parkinson's disease proctor telemedicine

Source of metals related to gold occurrences in Cameroon, Central African Belt

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Acta Geochimica 2024年第2期43卷 308-324页

作者： Kev.n igor Azeuda Ndonfack Jinlin Zhang Yuling Xie NSamiratou Yaya Emmanuel Archelaus Afanga Basua JCHX Mining Management Co. LtdBeijing 101500People’s Republic of China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037People’s Republic of China School of Civ.l and Env.ronmental Engineering University of Science and Technology BeijingBeijing 100083People’s Republic of China Department of Earth Science University of BamendaBamendaRepublic of Cameroon

Suites of granitic and metamorphic rocks form a perfect geological env.ronment in which to inv.stigate the source of metals related to gold *** the East Prov.nce of Cameroon,the source of metals-related gold(grade~4.6 g/t)that occurs within metamorphic and granitic rocks remains *** host rocks were subjected to XRF and ICP-MS whole-rock geochemistry and BSE/EDS mineral analyses to inv.stigate the source(s)of metals related to gold in the ***,chalcopyrite-pyrite and magnetite-ilmenite are the main sulfi des and oxides of granites,*** low-grade metamorphic rocks are sulfi de-rich consisting of arsenopyrite,chalcopyrite,pyrite,and sphalerite,and oxides include magnetite,ilmenite,hematite,and ***,Ni,Co,Sb,Sc,and Zn concentrations depleted in high-grade metamorphic rocks and granites compared to low-grade metamorphic *** well,Bi,Cd,Co,Cu,Ni,Sb,v.W,and Zn concentrations decrease with increasing temperatures from low-grade rocks to high-grade rocks and *** suite of depleted elements in high-grade rocks and granites is almost identical to those enriched in gold *** conclude that metals(Bi,Cd,Co,Cu,Ni,Sb,and Zn)related to gold mineralization in the East Prov.nce of Cameroon likely originated from metal-rich low-grade metamorphic rocks during prograde metamorphic processes prior to partial melting.

关键词： East Prov.nce of Cameroon Metamorphic rocks Granites Oxide–sulﬁdes Metal and gold Geochemistry

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熵增工程在电催化反应中的研究进展

物理化学学报 2024年第7期40卷 36-42页

作者：张新义任楷刘妍宁谷振一黄志雄郑硕航王晓彤郭晋芝 igor v.Zatov.ky 曹峻鸣吴兴隆东北师范大学化学学院长春130024 东北师范大学紫外光发光材料与技术教育部重点实验室长春130024 乌克兰国家科学院生物胶体化学研究所基辅03142乌克兰

目前对高性能与高稳定性的电催化剂进行精准合成仍然是亟待解决的问题。熵作为是最重要的热力学参数之一,是描述体系无序程度的物理量,其数值主要由材料的结构、磁矩、原子和电子振动共同决定。根据体系的构型熵值,我们通常将材料分为... 详细信息

目前对高性能与高稳定性的电催化剂进行精准合成仍然是亟待解决的问题。熵作为是最重要的热力学参数之一,是描述体系无序程度的物理量,其数值主要由材料的结构、磁矩、原子和电子振动共同决定。根据体系的构型熵值,我们通常将材料分为低熵材料(ΔS_(mix)1.5R)。随着熵值的增加,材料本征的物理与化学性质也会随之发生相应的变化。得益于不同金属元素的共存,在界面处原子级的多组分排列,所产生的协同性高熵效应能够有效地提升电催化反应的活性,因此在电催化领域中得到了广泛的研究关注。本综述对高熵电催化剂的基本概念、合成路线(“自上而下”与“自下而上”)以及在不同电催化反应类型中的高熵材料结构与性能之间的构效关系进行了系统总结,主要包括析氢(HER)、析氧(OER)、氧还原(ORR)、醇氧化(AOR)、氮还原(NRR)和二氧化碳还原反应(CO_(2)RR)等,从而阐明熵增工程对高性能电催化剂设计与应用的优势与潜力。同时,针对目前高熵催化剂研究所面临的主要问题与挑战,对未来基于熵增工程的高熵电催化剂的设计思路与合成方法进行展望。

关键词：熵增合成电化学高熵催化剂电催化

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Influence of Pt/Pd state on ceria-based support in CO oxidation

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Journal of Rare Earths 2023年第12期41卷 1963-1968,I0005页

作者： igor v.Zagaynov.Elena Yu.Liberman Alexander v.Naumkin A.A.Baikov.Institute of Metallurgy and Materials Science MoscowRussia D.I.Mendeleev.Univ.rsity of Chemical Technology of Russia MoscowRussia A.N.Nesmeyanov.Institute of Organoelement Compounds MoscowRussia

Noble metal(M:Pt,Pd,PtPd) supported on ceria system catalysts were *** oxidized and reduced forms of the activ. component were examined in CO *** catalysts become more activ. after a reduction pretreatment,which shifts the temperature of CO *** of the data obtained from characterization techniques indicates that the strong interaction of metal ions with the support prev.nt the reduction of the initial MO_(x)to metallic *** formation of M-ceria interfaces efficiently boosts the oxygen activ.tion during CO oxidation,leading to the formation of chemisorbed O on M and the regeneration of the ceria lattice oxygen,thus greatly improv.ng the catalytic performance.

关键词： Ceria Platinum Palladium CO oxidation Rare earths

Heat Transfer and Fluid Flow ov.r a Single Disk in a Fluid Rotating as a Rigid Body

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Journal of Thermal Science 2004年第3期13卷 279-282页

作者： igor v. shev.huk Matthias H. BUSCHMANN Institute of Engineering Thermophysics Ukrainian National Academy of Sciences 2a Zhelyabov St. Kiev 03057 UkraineInstitute of Fluid Mechanics Dresden University of Technology 01062 Dresden Germany

Laminar heat transfer problem is analyzed for a disk rotating with the angular speed ωin a co-rotating fluid (with the angular speed Ω). The fluid is swirled in accordance with a forced-v.rtex law, it rotates as a solid body at β= Ω/ω= const. Radial v.riation of the disk’s surface temperature follows a power law. An exact numerical solution of the problem is obtained basing on the self-similar profiles of the local temperature of fluid, its static pressure and v.locity components. Numerical computations were done at the Prandtl numbers Pr = 1(?)0.71. It is shown that with increasing βboth radial and tangential components of shear stresses decrease, and to zero v.lue at β= 1. Nusselt number is practically constant at β= 0(?) 0.3 (and ev.n has a point of a maximum in this region); Nu decrease noticeably for larger βv.lues.

关键词： rotating disk heat transfer fluid flow Nusselt number swirl.