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Optimizing geometric configuration of single Zn-N_(4) sites for boosting reciprocal transformation between aromatic alcohols and aldehydes

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Nano Research 2023年第7期16卷 9132-9141页

作者： Shengjie Wei Yucheng Jin Chunlin Lv Chao Lian Zheng Chen Xiao Liang Qinghua Zhang Xin Chen Dongdong Qi Zhi Li School of Materials Science and Engineering Nankai UniversityTianjin 300350China Department of Chemistry Tsinghua UniversityBeijing 100084China Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials Department of ChemistryUniversity of Science and Technology BeijingBeijing 100083China School of Pharmacy and Center on Translational Neuroscience Minzu University of ChinaBeijing 100081China Department of Chemistry School of ScienceBeijing Jiaotong UniversityBeijing 100091China School of Chemistry and Materials Science Anhui Normal UniversityWuhu 241002China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Solid State ChemistryUniversity of Science and Technology BeijingBeijing 100083China College of Chemistry Beijing Normal UniversityBeijing 100875China

It is significant to optimize geometric configuration of metal catalytic sites and boost their catalytic ***,we synthesized isolated single Zn-N_(4)sites on N-doped carbon(Zn-CN)by pyrolyzing zeolite imidazole framework-8(ZIF-8)at different *** the reciprocal transformation between benzyl alcohol and benzaldehyde,the catalytic activities of Zn-CN catalysts exhibited a volcano-like trend as the pyrolysis temperatures *** optimal catalyst was Zn-CN-900,with outstanding catalytic activity exceeding commercial 20 wt.%Pd/C and 20 wt.%Pt/C,promising to substitute the noble metalbased catalysts.X-ray absorption near-edge structure(XANES)measurements and density functional theory(DFT)calculation revealed the gradual transformation from tetrahedral ZnN_(4)sites of ZIF-8 into planar ZnN_(4)sites above 700℃,with the maximum planar ZnN_(4)sites in *** stronger adsorption between reactants and planar ZnN_(4)sites facilitated the activation of reactants compared with tetrahedral ZnN_(4)*** work will provide valuable insight into rational design of efficient catalysts by optimizing geometric configuration of catalytic sites.

关键词： geometric configuration single Zn-N_(4)sites benzyl alcohol oxidation hydrogen transfer reaction

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Composite laminar membranes for electricity generation from water evaporation

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Nano Research 2024年第1期17卷 307-311页

作者： Xiao Wang Gang Yuan Han Zhou Yu Jiang Shuo Wang Jiaojiao Ma Chongyang Yang Sheng Hu State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China

Harvesting clean energy from water evaporation has been extensively investigated due to its *** achieve high efficiency,energy conversion materials should contain multiple features which are difficult to be simultaneously obtained from single-component *** we use composite laminar membranes assembled by nanosheets of graphene oxide and mica,and find a sustained power density induced by water evaporation that is two orders of magnitude larger than that from membranes made by either of the *** power output is attributed to selective proton transport driven by water evaporation through the interlayer nanochannels in the *** process relies on the synergistic effects from negatively charged and hydrophilic mica surfaces that are important for proton selectivity and water transport,and the tunable electrical conductivity of graphene oxide that provides optimized internal *** demonstrated composite membranes offer a strategy of enhancing power generation by combining the advantages from each of their components.

关键词： graphene oxide mica water evaporation electrical double layer surface charge ion selectivity

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MOF-derived Cu embedded into N-doped mesoporous carbon as a robust support of PdAu nanocatalysts for ethanol electrooxidation

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Rare Metals 2024年第3期43卷 1083-1094页

作者： Yu-Fu Huang Peng Wu Jun-Ping Tang Jian Yang Jing Li Shuai Chen Xue-Ling Zhao ChengChen Bin-Wei Zhang Yan-Yun Ma Wei-Heng Shi Dong-Hai Lin Shi-Gang Sun School of Energy and Materials Shanghai Engineering Research Center of Advanced Thermal Functional MaterialsShanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai201209China State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing401331China Center of Advanced Energy Technology and Electrochemistry Institute of Advanced Interdisciplinary StudiesChongqing UniversityChongqing400044China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China Department of Materials Science and Engineering Drexel UniversityPhiladelphiaPA19104USA

Metal-organic frameworks(MOFs)h ave attracted widespread attention due to their large surface area and porous *** designing the nanostructures of MOFs to promote their application in ethanol electrooxidation is still a ***,a novel Cu-NCNs(Cu-nitrogen-doped carbon nanotubes)support was synthesized by pyrolysis of melamine(MEL)and Cu-ZIF-8 together,and then,Pd-Au nanoalloys were loaded by sodium borohydride reduction method to prepare PdAu@Cu-NCNs *** generating mesoporous carbon with high specific surface area and favorable electron and mass transport can be used as a potential excellent carrier for PdAu *** addition,the balance of catalyst composition and surface structure was tuned by controlling the content of Pd and ***,the best-performed Pd_(2)Au_(2)@Cu-NCN-1000-2(where 1000 means the carrier calcination temperature,and 2 means the calcination constant temperature time)catalyst exhibits better long-term stability and electrochemical activity for ethanol oxidation in alkaline media(4.80 A·mg^(-1)),which is 5.05 times higher than that of commercial Pd/C(0.95 A·mg^(-1)).Therefore,this work is beneficial to further promoting the application of MOFs in direct ethanol fuel cells(DEFCs)and can be used as inspiration for the design of more efficient catalyst support structures.

关键词： Metal-organic frameworks(MOFs) N-doped Mesoporous carbon PdAu Ethanol electrooxidation

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Observation of linear magnetoelectric effect in the van der Waals antiferromagnets Ni5(TeO3)4X2 (X=Cl,Br)

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Physical Review B 2024年第21期109卷 214435-214435页

作者： Bing Yu Suyun Wang Lin Huang Yongsen Tang Lin Lin Guanzhong Zhou Junhu Zhang Meifeng Liu Shuhan Zheng Zhibo Yan Xiaokun Huang Junfeng Wang Jianguo Wan XiangPing Jiang Jun-Ming Liu Laboratory of Solid State Microstructures School of Science Department of Applied Physics College of Science Institute for Advanced Materials School of Materials Science and Engineering Wuhan National High Magnetic Field Center and School of Physics

Realization of linear magnetoelectric (ME) effect in single-phase van der Waals (vdW) compounds, combined with magnetic (spin), electric dipole, and dimensions degrees of freedom, could lead to new applications, such as high-density multistate data storage. Although the linear ME effect has been broadly studied for decades, vdW materials with an intrinsic ME effect have been rarely explored so far. Using a recently proposed design principle of two-dimensional vdW materials, transition metal tellurate halides, Ni5(TeO3)4X2 (X=Cl,Br) with linear ME coupling, have been synthesized and remarkable ME effect is demonstrated here. The onset of simultaneous anomalies in magnetic susceptibility and specific heat suggests the noncollinear antiferromagnetic order with the Néel temperature TN∼30 K. In addition, a clear spin-flop transition appears below TN, driven by magnetic field along the x axis, indicating a strong magnetic anisotropy. Associated with the antiferromagnetic transition, a shape anomaly in the displacement current implies the appearance of ME response below TN with the ME coefficient αxy up to 4.2 ps/m in Ni5(TeO3)4Cl2. This is evidenced by the evolution of electric polarization (Px) with magnetic field (H//y) along the y axis at selected temperatures. The present study suggests that Ni5(TeO3)4X2 is an unusual class of vdW materials hosting the linear ME behaviors, and thus an attractive platform for investigating the complicated interactions among spin order, electric polarization, and van der Waals force in layered vdW compounds.

关键词： Electric polarization Ferroelectricity High magnetic fields Magnetic anisotropy Magnetic order Magnetic phase transitions Magnetic susceptibility Magnetoelectric effect Van der Waals systems

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Enhancing the crystallinity and stability of perovskite solar cells with 4-tert-butylpyridine induction for efficiency exceeding 24%

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Journal of Energy Chemistry 2024年第6期93卷 1-7,I0001页

作者： You Liu Lishuang Zheng Kuanxiang Zhang Kun Xu Weicheng Xie Jue Zhang Yulu Tian Tianyuan Liu Hanzhong Xu Ruoming Ma Wei Huang Jiahui Chen Jusheng Bao Chen Chen Yongsheng Zhou Xuchun Wang Junming Chen Jungan Wang College of Chemistry and Materials Engineering Anhui Science and Technology UniversityBengbu 233000AnhuiChina Anhui Province Quartz Sand Purification and Photovoltaic Glass Engineering Research Center Chuzhou 233100AnhuiChina Triumph Photovoltaic Materials Co.Ltd BengbuAnhuiChina National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210009JiangsuChina JinkoSolar Holding Co.Ltd HainingZhejiangChina

Perovskite solar cells(PSCs)have emerged as a promising photovoltaic technology because of their high light absorption coefficient,long carrier diffusion distance,and tunable ***,PSCs face challenges such as hysteresis effects and stability *** this study,we introduced a novel approach to improve film crystallization by leveraging 4-tert-butylpyridine(TBP)molecules,thereby enhancing the performance and stability of *** findings demonstrate the effective removal of PbI_(2)from the perovskite surface through strong coordination with TBP ***,by carefully adjusting the concentration of the TBP solution,we achieved enhanced film crystallinity without disrupting the perovskite *** TBP-treated perovskite films exhibit a low defect density,improved crystallinity,and improved carrier *** a result,the PSCs manufactured with TBP treatment achieve power conversion efficiency(PCE)exceeding 24%.Moreover,we obtained the PCE of 21.39%for the 12.25 cm^(2)module.

关键词： 4-tert-butylpyridine Film crystallization Perovskite solar cells Power conversion efficiency Stability improvement

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Nanograded artificial nacre with efficient energy dissipation

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The Innovation 2023年第6期4卷 76-82页

作者： Yu-Feng Meng Cheng-Xin Yu Li-Chuan Zhou Li-Mei Shang Bo Yang Qing-Yue Wang Xiang-Sen Meng Li-Bo Mao Shu-Hong Yu Department of Chemistr New Comerstone Science LaboratoryInstitute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of Materials Physics Anhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of SciencesHefei 230031China Institute of Physical Science and Information Technology Anhui UniversityHefei 230601China School of Mechanical Engineering Hefei University of TechnologyHefei 230009China Institute of Innovative Materials Department of Materials Science and EngineeringDepatment of ChemistrySouthem University of Science and TechnologyShenzhen 518055China

The renowned mechanical performance of biological ceramics can beattributed to their hierarchical structures,wherein structural features atthe nanoscale play a crucial ***,nanoscale features,such asnanogradients,have rarely been incorporated in biomimetic ceramicsbecause of the challenges in simultaneously controlling the materialstructure at multiple length ***,we report the fabrication of artificial nacre with graphene oxide nanogradients in its aragonite plateletsthrough a matrix-directed mineralization *** gradients areformed via the spontaneous accumulation of graphene oxide nanosheetson the surface of the platelets during the mineralization process,whichthen induces a lateral residual stress field in the *** tests and mercury intrusion porosimetry demonstrate that the material's energy dissipation is enhanced both intrinsically and extrinsicallythrough the compressive stress near the platelet *** energydissipation density reaches 0.159±0.007 nJ/μm^(3),and the toughnessamplification is superior to that of the most advanced cer ***-ical simulations also agree with the finding that the stress field not ablycontributes to the overall energy *** work demonstratesthat the energy dissipation of biomimetic ceramics can be furtherincreased by integrating design principles spanning multiple *** strategy can be readily extended to the combinations of other struc-tural models for the design and fabrication of structural ceramics withcustomized and optimized performance.

关键词： ceramics artificial energy

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Hybrid hard carbon framework derived from polystyrene bearing distinct molecular crosslinking for enhanced sodium storage

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Carbon Energy 2024年第7期6卷 178-190页

作者： Yuqian Qiu Guangshen Jiang Yanxia Su Xinren Zhang Yuxuan Du Xiaosa Xu Qian Ye Jinbo Zhang Miaohan Ban Fei Xu Hongqiang Wang State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene(NPU)Xi'anChina State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhouChina Shaanxi Yanchang Petroleum(Group)Co. Ltd.Dalian Institute of Chemical Physics Xi'anClean Energy(Chemical)Research InstituteXi'anChina

Exploiting high-performance yet low-cost hard carbon anodes is crucial to advancing the state-of-the-art sodium-ion ***,the achievement of superior initial Coulombic efficiency(ICE)and high Na-storage capacity via low-temperature carbonization remains challenging due to the presence of tremendous defects with few closed ***,a facile hybrid carbon framework design is proposed from the polystyrene precursor bearing distinct molecular bridges at a low pyrolysis temperature of 800℃ via in situ fusion and embedding *** is realized by integrating triazine-and carbonylcrosslinked polystyrene nanospheres during *** triazine crosslinking allows in situ fusion of spheres into layered carbon with low defects and abundant closed pores,which serves as a matrix for embedding the well-retained carbon spheres with nanopores/defects derived from carbonyl ***,the hybrid hard carbon with intimate interface showcases synergistic Na ions storage behavior,showing an ICE of 70.2%,a high capacity of 279.3 mAh g^(-1),and long-term 500 cycles,superior to carbons from the respective precursor and other reported carbons fabricated under the low carbonization *** present protocol opens new avenues toward low-cost hard carbon anode materials for high-performance sodiumion batteries.

关键词： closed pores hybrid hard carbons hypercrosslinking polystyrenes low-temperature carbonization sodium storage

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An overview of functional biolubricants

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Friction 2023年第1期11卷 23-47页

作者： Lumin YANG Xiaoduo ZHAO Zhengfeng MA Shuanhong MA Feng ZHOU State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Enginering University of Chinese Academy of SciencesBeijing 100049China Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering Yantai 264006China Shandong Laboratory of Yantai Advanced Materials and Green Manufacture Yantai 264006China

At present,more and more diseases are associated with the lubrication dysfunction,which requires a systematic study of the complex lubrication behavior of tissues and organs in human *** biomacromolecular lubricants are essential for maintaining ultra-low coefficients of friction between sliding biological ***,when the surface lubrication performance of tissues or organs destroys heavily,it will bring friction/shear damage for sliding contact ***,the application of exogenous biological lubricating materials to improve the lubrication situation of damaged tissue or organ interfaces has attracted extensive attention of *** this review,based on a simple summary of lubrication mechanism at sliding biological interface,we systematically introduce the research progress of several kinds of representatively biolubrication materials,including eye drops,tissue anti-adhesion agents,joint lubricants,and medical device ***,the lubrication mechanism and individual advantage and shortcoming for each of these synthetic exogenous lubricated materials are ***,the important lubrication application functionality of these biolubricant materials in typically medical surgery scenes,such as dry eye syndrome,tissue adhesion,arthritis,and interventional medical devices,is ***,we look forward to the future development direction of artificial biolubricant materials.

关键词： biolubricants eye drops tissue anti-adhesion arthritis treatment medical devices

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Enhanced hydrogen evolution reaction in FePt film with remanence due to decrease in domain walls

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Rare Metals 2024年第3期43卷 1108-1115页

作者： Hong Hong Dong-Xue Liu Jun Li Jun-Ming Li Li-Qian Wu Bo Yang Qing-Qi Cao Dun-Hui Wang National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresJiangsu Provincial Key Laboratory for NanotechnologySchool of PhysicsNanjing UniversityNanjing210093China Hangzhou Dianzi University Hangzhou310018China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang110819China

As an effective strategy to improve the properties of electrocatalysts,magnetic field-assisted electrocatalytic water splitting has attracted increasing attention ***,the corresponding enhancements mostly depend on the exertion of an external magnetic field during electrochemical reactions,which results in a high cost of industrial production,and makes the magnetic field manipulation of electrocatalysis become a challenging *** this work,instead of the external magnetic field,a bias magnetic field is self-supplied by the remanence state of a ferromagnetic electrocatalyst of *** to the assistance of this bias magnetic field,the FePt film in the remanence state shows the overpotential of 229 mV during hydrogen evolution reaction,which is much lower than that in its demagnetization state(283 mV).Our findings demonstrate that the remanence in ferromagnetic electrocatalysts can improve the catalytic performance,which is attributed to the decrease in domain walls.

关键词： Remanence Magnetic domains Electrocatalysis Hydrogen evolution reaction(HER)

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Vanadium oxide cathode with synergistic engineering of calcium-ion intercalation and polyaniline coating for high performance zinc-ion batteries

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Frontiers of Chemical science and engineering 2023年第9期17卷 1244-1253页

作者： Lin Zhang Xinghua Qin Lang Wang Zifang Zhao Liwei Mi Qiongqiong Lu Center for Advanced Materials Research Zhongyuan University of TechnologyZhengzhou450007China Institute of Materials and Technology Dalian Maritime UniversityDalian116026China School of Chemistry and Chemical Engineering Henan Institute of Science and TechnologyXinxiang453000China Institute of Materials Henan Academy of SciencesZhengzhou450046China Leibniz Institute for Solid State and Materials Research(IFW)Dresden E.V. Dresden01069Germany

Vanadium oxides as cathode for zinc-ion batteries have attracted much attention because of their high theoretical capacity,flexible layered structure and abundant ***,cathodes are susceptible to the collapse of their layered structure and the dissolution of vanadium after repeated long cycles,which worsen their capacities and cycling ***,a synergistic engineering of calcium-ion intercalation and polyaniline coating was developed to achieve the superior electrochemical performance of vanadium pentoxide for zinc-ion *** pre-intercalation of calcium-ion between vanadium pentoxide layers as pillars increase the crystal structure’s stability,while the polyaniline coating on the cathodes improves the conductivity and inhibits the dissolution of *** synergistic engineering enables that the battery system based-on the polyaniline coated calcium vanadate cathode to deliver a high capacity of 406.4 mAh·g^(−1)at 1 A·g^(−1),an ultralong cycle life over 6000 cycles at 10 A·g^(−1)with 93%capacity retention and high-rate *** vanadium oxide cathode with synergistic engineering of calcium-ion intercalation and polyaniline coating was verified to effectively improve the electrochemical performance of zinc-ion batteries.

关键词： zinc-ion battery CaV8O_(2)0 polyaniline coating synergistic engineering high capacity long durability

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