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Bimetallic metal-organic framework derived doped carbon nanostructures as high-performance electrocatalyst towards oxygen reactions

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Nano Research 2021年第5期14卷 1533-1540页

作者： Lu Chen Zhi Chen Xudong Liu Xiaolei Wang Department of Chemical and Materials Engineering Concordia UniversityMontrealQuebecH3G 1M8Canada Department of Building Civil and Environmental EngineeringConcordia UniversityMontrealQuebecH3G 1M8Canada Department of Chemical and Materials Engineering University of AlbertaEdmontonAlbertaT6G 1H9Canada

Rational design and development of cost-effective, highly active and durable bifunctional electrocatalysts towards oxygen redox reactions is of critical importance but great challenge for the broad implementation of next-generation metal-air batteries for electric transportation. Herein, a high-performance electrocatalyst of cobalt and zinc sulfides nanocrystals embedded within nitrogen and sulfur co-doped porous carbon is successfully designed and derived from bimetallic metal-organic frameworks of cobalt and zinc containing zeolitic imidazolate frameworks. The unique nanostructure contains abundant electrocatalytic active sites of sulfides nanocrystals and nitrogen and sulfur dopants which can be fast accessed through highly porous structure originate from both zinc vaporization and sulfurization processes. Such bifunctional electrocatalyst delivers a superior half-wave potential of 0.86 V towards oxygen reduction reaction and overpotential of 350 mV towards oxygen evolution reaction, as well as excellent durability owing to the highly stable carbon framework with a great graphitized portion. The performance boosting is mainly attributed to the unique nanostructure where bimetallic cobalt and zinc provide synergistic effect during both synthesis and catalysis processes. The design and realization pave a new way of development and understanding of bifunctional electrocatalyst towards clean electrochemical energy technologies.

关键词： bimetallic metal-organic frameworks carbon nanostructures electrocatalysts oxygen redox reactions nitrogen and sulfur doping

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Piezoresistive behavior of elastomer composites with segregated network of carbon nanostructures and alumina

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Nano Materials Science 2023年第3期5卷 312-318页

作者： Chun-Yan Tang Lei Liu Kai Ke Bo Yin Ming-Bo Yang Wei Yang College of Polymer Science and Engineering Sichuan UniversityState Key Laboratory of Polymer Materials EngineeringChengdu610065SichuanChina

Electrically conductive elastomer composites(CECs)with segregated networks of conductive nanofillers show high potential in stretchable strain sensors due to balanced mechanical and electrical properties,yet the sensitivity at low strain is generally insufficient for practical ***,we report an easy and effective way to improve the resistive response to low strain for CECs with segregated network structure via adding stiff alumina into carbon nanostructures(CNS).The CEC containing 0.7 wt%CNS and 5 wt%Al_(2)O_(3) almost sustains the same elasticity(elongation at break of~900%)and conductivity(0.8 S/m)as the control,while the piezoresistive sensitivity is significantly *** polyurethane(TPU)composites with a segregated network of hybrid nanofillers(CNS and Al_(2)O_(3))show much higher strain sensitivity(Gauge factor,GF-566)at low strain(45%strain)due to a local stress concentration effect,this sensitivity is superior to that of TPU/CNS composites(GF-11).Such a local stress concentration effect depends on alumina content and its distribution at the TPU particle *** addition,CECs with hybrid fillers show better reproducibility in cyclic piezoresistive behavior testing than the *** work offers an easy method for fabricating CECs with a segregated filler network offering stretchable strain sensors with a high strain sensitivity.

关键词： Thermoplastic polyurethane carbon nanostructures Alumina Conductive elastomer composites Stretchable strain sensor

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Equilibrium Configurations of Lipid Bilayer Membranes and carbon nanostructures

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Communications in Theoretical Physics 2013年第2期59卷 213-228页

作者： Ivalo M. Mladenov Peter A. Djondjorov Mariana Ts. Hadzhilazova Vassil M. Vassilev Institute of Biophysics Bulgarian Academy of Sciences Acad. G. Bonchev Str. Block 21 1113 Sofia Bulgaria Institute of Mechanics Bulgarian Academy of Sciences Acad. G. Bonchev Str. Block 4 1113 Sofia Bulgaria

The present article concerns the continuum modelling of the mechanical behaviour and equilibrium shapes of two types of nano-scale objects： fluid lipid bilayer membranes and carbon nanostructures. A unified continuum model is used to handle four different ease studies. Two of them consist in representing in analytic form cylindrical and axisymmetric equilibrium configurations of single-wall carbon nanotubes and fluid lipid bilayer membranes subjected to uniform hydrostatic pressure. The third one is concerned with determination of possible shapes of junctions between a single-wall carbon nanotube and a fiat graphene sheet or another single-wall carbon nanotube. The last one deals with the mechanical behaviour of closed fluid lipid bilayer membranes （vesicles） adhering onto a fiat homogeneous rigid substrate subjected to micro-injection and uniform hydrostatic pressure.

关键词： fluid membranes graphene carbon nanotubes carbon nanostructures junctions variational statement Euler-Lagrange equations natural boundary conditions cell injection adhesion equi- librium shapes

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Chemical modification of ordered/disordered carbon nanostructures for metal hosts and electrocatalysts of lithium-air batteries

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InfoMat 2022年第1期4卷 105-129页

作者： Jeongyeon Lee Tae Hyung Lee Ho Won Jang Ho Seok Park School of Chemical Engineering Convergence Research Center for Energy and Environmental SciencesDepartment of Health Sciences and TechnologySamsung Advanced Institute for Health Sciences and Technology(SAIHST)Sungkyunkwan University(SKKU)SuwonRepublic of Korea Institute of Textiles Clothing The Hong Kong Polytechnic UniversityHung HomHong Kong SARChina Department of Materials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoulRepublic of Korea

Although lithium-air batteries(LABs)are considered the promising alternative of existing lithium–ion batteries owing to their high energy density of 11680 W h kg^(-1),their practical applications are limited by the technical issues,such as unstable solid electrolyte interface and dendrite formation from metal anode and insufficient bifunctional activities and durability from cathode *** order to resolve these bottlenecks,carbon nanostructures have been investigated owing to their high surface area,excellent electrical conductivity,electrochemical stability,and various modification ***,we comprehensively review a recent progress on the design of carbon nanostructures for their applications into metal hosts,protection layers,and bifunctional electrocatalysts of *** correlation between the crystalline,electronic,porous,and chemical structures and the electrochemical properties of carbon nanomaterials are discussed depending on their classification and *** chemical modifications,such as morphological control,hierarchical architecturing,heteroatom incorporation,and the formation of composites,for the improved electrochemical performances of anode and cathode will be also ***,we deal with the perspectives for the ongoing obstruction and future guidance.

关键词： bifunctional catalysts carbon nanostructures lithium-air batteries metal anodes surface modification

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Scanning probe microscopy in probing low-dimensional carbon-based nanostructures and nanomaterials

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Materials Futures 2022年第3期1卷 84-104页

作者： Chi Zhang Zewei Yi Wei Xu Interdisciplinary Materials Research Center College of Materials Science and EngineeringTongji UniversityShanghai 201804People’s Republic of China

carbon,as an indispensable chemical element on Earth,has diverse covalent bonding ability,which enables construction of extensive pivotal carbon-based structures in multiple scientific *** extraordinary physicochemical properties presented by pioneering synthetic carbon allotropes,typically including fullerenes,carbon nanotubes,and graphene,have stimulated broad interest in fabrication of carbon-based nanostructures and *** regulation of topology,size,and shape,as well as controllably embedding target sp^(n)-hybridized carbons in molecular skeletons,is significant for tailoring their structures and consequent properties and requires atomic precision in their *** probe microscopy(SPM),combined with on-surface synthesis strategy,has demonstrated its capabilities in fabrication of various carbon-based nanostructures and nanomaterials with atomic precision,which has long been elusive for conventional solution-phase synthesis due to realistic obstacles in solubility,isolation,purification,*** intriguingly,atom manipulation via an SPM tip allows unique access to local production of highly reactive carbon-based *** addition,SPM provides topographic information of carbon-based nanostructures as well as their characteristic electronic structures with unprecedented submolecular resolution in real *** this review,we overview recent exciting progress in the delicate application of SPM in probing low-dimensional carbon-based nanostructures and nanomaterials,which will open an avenue for the exploration and development of elusive and undiscovered carbon-based nanomaterials.

关键词： scanning probe microscopy carbon nanostructures carbon nanomaterials synthetic carbon allotropes on-surface synthesis

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Solid-state Synthesis of carbon-nanostructures

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复旦学报（自然科学版） 2007年第5期46卷 701-页

作者： R.Wilhelm A.Winkel D.Jain Institute of Organic Chemistry Clausthal University of Technology

1 Results In addition to single wall and multiwall carbon nanotubes[1], several structures,which are more or less related to fullerenes,including carbon nanohorns[2a], carbon nanospheres[2b] and onion like carbon structures[2c] have been reported.A new simple straight forward method to access some of these structures is the solid-state pyrolysis of different organometallic complexes in a sealed vessel,which led so far to carbon nanotubes[3a,b], carbon nanocables[3c] and onions[3d].

关键词： pyrolysis organometallic complexes carbon nanostructures

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Tribologically induced nanostructural evolution of carbon materials: A new perspective

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Friction 2024年第1期12卷 144-163页

作者： Guilherme Oliveira NEVES Nicolás ARAYA Diego Berti SALVARO Thiago de Souza LAMIM Renan Oss GIACOMELLI Cristiano BINDER Aloisio Nelmo KLEIN JoséDaniel Biasoli de MELLO Laboratório de Materiais Universidade Federal de Santa CatarinaSanta Catarina 88040-900Brazil Departamento de Ingeniería Mecánica Facultad de IngenieríaUniversidad del Bío-BíoConcepcion 4070-386Chile Universidad de Concepción Concepcion 4070-386Chile SENAI Innovation Institute for Laser Processing Santa Catarina 89218-153Brazil Universidade Federal de Uberlândia Minas Gerais 38408-100Brazil

carbon-based solid lubricants are excellent options to reduce friction and wear,especially with the carbon capability to adopt different allotropes *** the macroscale,these materials are sheared on the contact along with debris and contaminants to form tribolayers that govern the tribosystem *** a recently developed advanced Raman analysis on the tribolayers,it was possible to quantify the contactinduced defects in the crystalline structure of a wide range of allotropes of carbon-based solid lubricants,from graphite and carbide-derived carbon particles to multi-layer graphene and carbon *** addition,these materials were tested under various dry sliding conditions,with different geometries,topographies,and solid-lubricant application *** of the initial tribosystem conditions and allotrope level of atomic ordering,there is a remarkable trend of increasing the point and line defects density until a specific saturation limit in the same order of magnitude for all the materials tested.

关键词： carbon nanostructures tribology Raman spectroscopy defects quantification tribolayer solid lubrication

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carbon‑Based Electrodes for Advanced Zinc‑Air Batteries:Oxygen‑Catalytic Site Regulation and Nanostructure Design

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Electrochemical Energy Reviews 2023年第1期6卷 532-572页

作者： Wenjie Shao Rui Yan Mi Zhou Lang Ma Christina Roth Tian Ma Sujiao Cao Chong Cheng Bo Yin Shuang Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065SichuanChina College of Biomass Science and Engineering Sichuan UniversityChengdu 610065SichuanChina Department of Ultrasound West China HospitalSichuan UniversityChengdu 610041SichuanChina Electrochemical Process Engineering Engineering SciencesUniversity of BayreuthUniversitätsstr.3095447 BayreuthGermany Med-X Center for Materials Sichuan UniversityChengdu 610065SichuanChina Functional Materials Department of ChemistryTechnische Universität BerlinHardenbergstraße 4010623 BerlinGermany

Zn-air batteries are highly attractive for direct chemical-to-electrical energy conversion and for solving the energy crisis and environmental *** efficient oxygen electrodes has been considered one of the most critical steps in the development of advanced Zn-air batteries because of the sluggish kinetics of the oxygen reduction reaction and the oxygen evolution *** recent years,nanostructured carbon-based electrodes with large surface areas,efficient oxygen-catalytic centers,and hierarchically porous matrices have provided significant opportunities to optimize the performance of the oxygen electrodes in both primary and rechargeable Zn-air *** this review,we provide a comprehensive summary of the reported nanostructured carbon-based electrodes for advanced Zn-air batteries in terms of tailoring the oxygen-catalytic sites and designing carbon *** versatile synthetic strategies,characterization methods,and in-depth understanding of the relationships between the oxygen-catalytic sites/nanostructures and the oxygen electrode performance are systematically ***,we also briefly outline recent progress in engineering flexible and high-power Zn-air ***,a thorough discussion of current primary challenges and future perspectives on the rational design of nanostructured carbon-based oxygen electrodes is given,thus providing inspiration for the future prosperity of fast-kinetic and efficient Zn-air batteries in a broad range of energy fields.

关键词： Zn-air batteries carbon nanostructures Electrocatalysts Oxygen-catalytic catalysts ORR OER

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Pulsed laser ablation in liquid of sp-carbon chains:Status and recent advances

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Chinese Physics B 2022年第12期31卷 325-345页

作者： Pietro Marabotti Sonia Peggiani Alessandro Vidale Carlo Spartaco Casari Department of Energy Politecnico di MilanoVia Ponzio 34/320133MilanoItaly

This review provides a discussion of the current state of research on sp-carbon chains synthesized by pulsed laser ablation in *** recent years,pulsed laser ablation in liquid(PLAL)has been widely employed for polyynes synthesis thanks to its flexibility with varying laser parameters,solvents,and *** allows the control of sp-carbon chains properties as yield,length,termination and *** many reviews related to PLAL have been published,a comprehensive work reporting the current status and advances related to the synthesis of sp-carbon chains by PLAL is still *** we first review the principle of PLAL and the mechanisms of formation of sp-carbon *** we discuss the role of laser fluence(*** density),solvent,and target for sp-carbon chains ***,we report the progress related to the prolonged stability of sp-carbon chains by PLAL encapsulated in polymeric *** review will be a helpful guide for researchers interested in synthesizing sp-carbon chains by PLAL.

关键词： pulsed laser ablation in liquid sp-carbon chains carbyne carbon nanostructures

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An introduction to molecular spintronics

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Science China Chemistry 2012年第6期55卷 867-882页

作者： JIANG ShangDa GOB Karin CERVETTI Christian BOGANI Lapo Physikalisches Institut Universitiit Stuttgart Pfaffenwaldring 57 70550 Stuttgart Germany Max Planck lnstitut fiir Festkoerperforschung Heisenbergstrasse 1 70569 Stuttgart Germany

We review the progress and future possibilities in the emerging area of molecular spintronics. We first provide an overview of the different transport regimes in which electronic nanodevices can operate, then briefly overview the important characteristics of molecular magnetic materials that can be useful for application in spintronics and we eventually present several schemes to include such systems into spintronic nanodevices. We hightlight the importance of a chemical approach to the area, and in the last section we showcase some approaches to the creation of hybrids made of carbon nanostructures and molecular magnets, which are gaining increasing attention.

关键词： carbon nanostructures molecular spintronics molecular magnetism quantum transport electronicnanodevices

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