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一种用于肼氧化-复合海水电解制氢的富吡啶氮碳纸

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Science China materials 2024年第3期67卷 752-761页

作者：马闪闪喻博夏宝玉游波 Key Laboratory of material Chemistry for energy Conversion and Storage(Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China

丰富的中性海水有望替代高纯淡水用于绿氢制备,然而基于过渡金属材料催化的直接海水电解会因析氯反应(ClER)引发严重的腐蚀问题并造成二次重金属污染,且析氧反应(OER)的动力学缓慢.本工作中,我们报道了一种稳定的富吡啶氮的碳纸(N-CP-80... 详细信息

丰富的中性海水有望替代高纯淡水用于绿氢制备,然而基于过渡金属材料催化的直接海水电解会因析氯反应(ClER)引发严重的腐蚀问题并造成二次重金属污染,且析氧反应(OER)的动力学缓慢.本工作中,我们报道了一种稳定的富吡啶氮的碳纸(N-CP-800),可以有效地催化肼氧化反应(HzOR),以取代中性海水中的OER用于节能制氢.结合电化学实验、原位衰减全反射-表面增强傅里叶变换红外光谱表征和密度泛函理论计算,我们发现:相较于吡咯氮和石墨氮,zig和arm构型的吡啶氮更有利于决速步(^(*)H+N_(2)H_(1))的质子脱附,以促进肼氧化反应.因此,N-CP-800在中性介质中进行HzOR时,仅需0.78 V(相对于可逆氢电势)便可达到10 mA cm^(-2),低于其OER/ClER竞争反应.当N-CP-800与非贵金属析氢催化剂CoP耦合进行HzOR-复合海水电解时,仅需1.56 V的电压即可达到10 mA cm^(-2),并能稳定运行200 h,优于Pt/C和RuO_(2)标准电极对催化的海水电解.

关键词： seawater electrolysis hydrazine oxidation hydrogen evolution nitrogen doping metal-free carbon

Incorporation sodium ions into monodisperse lead-free double perovskite Cs_(2)AgBiCl_(6) nanocrystals to improve optical properties

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Chinese Chemical Letters 2024年第3期35卷 549-553页

作者： Song Wang Ying Xie Wenchao Jiang Binghang Liu Keying Shi Kai Pan Key Laboratory of Functional Inorganic material Chemistry Ministry of EducationHeilongjiang UniversityHarbin 150080China School of materials Science and Engineering Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and ApplicationsChangzhou UniversityChangzhou 213164China State Key Laboratory of Catalysis Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Lead-free double perovskite nanocrystals(NCs)have emerged as a promising candidate in the optical field,owing to their non-toxic,good moist heat and chemical ***,their poor optical properties limited their *** improve the optical properties of lead-free double perovskite NCs,metal ion doping or alloying had been suggested as a promising ***,we prepared monodisperse,uniformly sized,cubic morphology of Cs_(2)AgBiCl_(6)NCs with different Na^(+)incorporation amounts via a simple hot-injection *** Na^(+)incorporation broke the parity-forbidden transition by reducing the inversion symmetry of the electron wave function at the Ag site,which changed the parity of the self-trapped exciton wave function and thus allowed radiative *** a result,the photoluminescence quantum yield(PLQY)of Na^(+)-alloyed Cs_(2)AgBiCl_(6)NCs(12.1%)was higher than that of Cs_(2)AgBiCl_(6)NCs(2.4%),and the exciton lifetime of Na^(+)-alloyed Cs_(2)AgBiCl_(6)NCs increased to 36.98 ns from 17.58 ns for Cs_(2)AgBiCl_(6)*** adjusting the amount of Na^(+)incorporation,the band gap of Cs_(2)AgBiCl_(6)NCs can be significantly tuned from~2.90 eV to~3.50 ***,the temperature-dependent photoluminescence spectra indicated that the Na^(+)-alloyed Cs_(2)AgBiCl_(6)NCs possessed higher longitudinal optical phonon energy and exciton binding energy compared to Cs_(2)AgBiCl_(6)*** suggested that there were strong exciton-phonon interactions during exciton recombination,a reduced probability of non-radiative processes,and excellent thermal *** offers a promising strategy for improving the optical properties of lead-free double perovskite NCs,and have the potential to replace traditional lead halide perovskite NCs in future optoelectronic applications.

关键词： Nanocrystals Alloy Double perovskites Optical properties Exciton binding energy

Recent advances of versatile reagents as controllable building blocks in organic synthesis

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Chinese Chemical Letters 2024年第2期35卷 24-43页

作者： Shaomin Chen Luigi Vaccaro Yanlong Gu Key Laboratory of material Chemistry for energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China Laboratory of Green S.O.C. Dipartimento di ChimicaBiologia e BiotecnologieUniversità degli Studi di PerugiaVia Elce di Sotto 8Perugia 06123Italy School of Chemistry and Chemical Engineering The Key Laboratory for Green Processing of Chemical Engineering of Xinjiang BingtuanShihezi UniversityShihezi 832004China

Diversity-oriented synthesis is a powerful and interesting synthetic tool for the rapid construction of structurally complex and privileged scaffolds from readily accessible starting *** date,diversity-oriented synthesis mostly relies on the employment of versatile *** reagents can be regulated as controllable and flexible building blocks for multipurpose *** the past decade,a variety of multifunctional reagents have been ***,most versatile reagents usually need multi-step synthesis,thus restricting their wide application to a large *** terms of the practicalities and universalities,we prefer to pay more attention to the utilization of simple and practical versatile reagents with multiple reactivities,mainly including atropaldehyde acetals,aryl methyl ketones,vinylene carbonate,vinyl azides,aryldiazonium salts,rongalite,halodifluoromethyl *** importantly,these versatile reagents can also play different roles simultaneously in the same reaction,in which their different reactivities are converged into the final target *** strategy can not only offer more possibilities for the synthesis of several active pharmaceutical ingredients,but also minimize the occurrence of some side reactions by lessening the varieties of ***,a perspective is given at the end of this review.

关键词： Versatile reagents Divergent synthesis Dual synthons Bond cleavage Tandem reactions

Work-function effect of Ti_(3)C_(2)/Fe-N-C inducing solid electrolyte interphase evolution for ultra-stable sodium storage

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Nano Research 2024年第8期17卷 7163-7173页

作者： Huicong Xia Lingxing Zan Hongliang Dong Yifan Wei Yue Yu Jinfu Shu Jia-Nan Zhang Chong-Xin Shan Key Laboratory of Advanced energy Catalytic and Functional material Preparation of Zhengzhou College of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Key Laboratory of materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China Key Laboratory of Chemical Reaction Engineering of Shaanxi Province College of Chemistry and Chemical EngineeringYan’an UniversityYan’an 716000China Center for High Pressure Science and Technology Advanced Research PudongShanghai 201203China Key Laboratory of Advanced energy materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

In the quest to enhance the efficiency of sodium-ion batteries,the dynamics of solid electrolyte interphase(SEI)formation are of paramount *** SEI layer’s integrity is integral to the charge–discharge efficiency and the overall longevity of the ***,a novel two-dimensional Ti_(3)C_(2)fragments enmeshed on iron-nitrogen-carbon(Fe-N-C)nanosheets(Ti_(3)C_(2)/Fe-NC)has been *** electrode features a matrix which has been shown to expedite SEI layer formation through the facilitation of selective anion adsorption,thus augmenting battery *** functional theory calculation reveals that the SEI evolution energy of NaPF6 at the Ti_(3)C_(2)/Fe-N-C interface is 0.81 eV,significantly lower than the Ti_(3)C_(2)(1.23 eV).This process is driven by the electron transportation from Ti_(3)C_(2)to Fe-N-C substrate,facilitated by their work-function difference,leading to the formation of ferromagnetic Fe species,which possesses Fe 3d d_(xz)d_(z)2 orbitals and undergoes hybridization with theπandσorbitals of NaF,creating a key intermediate during *** process diminishes the antibonding energy and attenuates the orbital interaction with NaF,thus reducing the activation energy and improving the SEI formation reaction ***,it leads to the creation of multi-interface SEI characterized by high-throughput ion transport and an efficient reaction network.

关键词： Ti_(3)C_(2)/Fe-N-C heterostructure work-function electron interaction solid electrolyte interphase sodium storage

Mechanism of interfacial effects in sodium-ion storage devices

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Nano Research 2024年第3期17卷 1313-1326页

作者： Yifan Wei Lingxing Zan Huicong Xia Wenfu Yan Jia-Nan Zhang College of materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Key Laboratory of Advanced energy Catalytic and Functional material Preparation of Zhengzhou City Zhengzhou 450001China Key Laboratory of Chemical Reaction Engineering of Shaanxi Province College of Chemistry&Chemical EngineeringYan’an UniversityYan’an 716000China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry and College of Chemistry Jilin UniversityChangchun 130012China

Rechargeable sodium-ion batteries(SIBs)are considered as the next-generation secondary *** performance of SIB is determined by the behavior of its electrode surface and the electrode–electrolyte interface during charging and ***,the characteristics of these surfaces and interfaces should be analyzed to realize large-scale energy storage systems with high energy density and long-cycle *** various studies have investigated the properties of electrode materials,few studies have focused on the construction of stable and efficient SIB interfaces,and even fewer have explored the mechanisms of interfacial effects;however,the strategies of regulating interfacial effects are yet to be completely ***,the results obtained thus far are insufficient to draw systematic *** present study reviews the literature on the mechanism of interfacial effects in Na+storage *** interfaces in a sodium-ion storage device include a heterogeneous interface between electrode materials,a solid electrolyte interphase,and a cathode electrolyte *** interfacial effects during the intercalation,transformation,and alloy reactions and the resulting overall battery performance were theoretically *** this review,we aim to provide a theoretical basis for optimizing the structures of electrode surface and electrode–electrolyte interface to optimize the performance of *** addition,the challenges of investigating interfacial effects and several possible helpful methods and opportunities for studying the mechanisms of interfacial effects in SIBs will be presented.

关键词： sodium-ion storage interfacial effects solid electrolyte interphase cathode electrolyte interphase

Electrochemical anodic oxidation assisted fabrication of memristors

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International Journal of Extreme Manufacturing 2024年第3期6卷 250-272页

作者： Shuai-Bin Hua Tian Jin Xin Guo School of materials Science and Engineering State Key Laboratory of Material Processing and Die&Mould TechnologyHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China

Owing to the advantages of simple structure,low power consumption and high-density integration,memristors or memristive devices are attracting increasing attention in the fields such as next generation non-volatile memories,neuromorphic computation and data ***,the deposition of memristive films often requires expensive equipment,strict vacuum conditions,high energy consumption,and extended processing *** contrast,electrochemical anodizing can produce metal oxide films quickly(e.g.10 s) under ambient *** means of the anodizing technique,oxide films,oxide nanotubes,nanowires and nanodots can be fabricated to prepare *** film thickness,nanostructures,defect concentrations,etc,can be varied to regulate device performances by adjusting oxidation parameters such as voltage,current and *** memristors fabricated by the anodic oxidation technique can achieve high device consistency,low variation,and ultrahigh yield *** article provides a comprehensive review of the research progress in the field of anodic oxidation assisted fabrication of ***,the principle of anodic oxidation is introduced;then,different types of memristors produced by anodic oxidation and their applications are presented;finally,features and challenges of anodic oxidation for memristor production are elaborated.

关键词： anodic oxidation anodized aluminium oxide memristor resistive switching electrical properties

一种用于肼氧化-复合海水电解制氢的富吡啶氮碳纸（英文）

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Science China materials 2024年

作者：马闪闪喻博夏宝玉游波 Key Laboratory of material Chemistry for energy Conversion and Storage (Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service Failure School of Chemistry and Chemical Engineering Huazhong University of Science and Technology

丰富的中性海水有望替代高纯淡水用于绿氢制备,然而基于过渡金属材料催化的直接海水电解会因析氯反应(ClER)引发严重的腐蚀问题并造成二次重金属污染,且析氧反应(OER)的动力学缓慢.本工作中,我们报道了一种稳定的富吡啶氮的碳纸(N-CP-80...

丰富的中性海水有望替代高纯淡水用于绿氢制备,然而基于过渡金属材料催化的直接海水电解会因析氯反应(ClER)引发严重的腐蚀问题并造成二次重金属污染,且析氧反应(OER)的动力学缓慢.本工作中,我们报道了一种稳定的富吡啶氮的碳纸(N-CP-800),可以有效地催化肼氧化反应(HzOR),以取代中性海水中的OER用于节能制氢.结合电化学实验、原位衰减全反射-表面增强傅里叶变换红外光谱表征和密度泛函理论计算,我们发现:相较于吡咯氮和石墨氮, zig和arm构型的吡啶氮更有利于决速步(*H+N2H1)的质子脱附,以促进肼氧化反应.因此, N-CP-800在中性介质中进行HzOR时,仅需0.78 V (相对于可逆氢电势)便可达到10 mA cm-2,低于其OER/ClER竞争反应.当N-CP-800与非贵金属析氢催化剂CoP耦合进行HzOR-复合海水电解时,仅需1.56 V的电压即可达到10 mA cm-2,并能稳定运行200 h,优于Pt/C和RuO2标准电极对催化的海水电解.

关键词：

NiCoZn/C@melamine sponge-derived carbon composites with high-performance electromagnetic wave absorption

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International Journal of Minerals,Metallurgy and materials 2024年第10期31卷 2274-2286页

作者： Xiubo Xie Heshan Wang Hideo Kimura Cui Ni Wei Du Guanglei Wu School of Environmental and material Engineering Yantai University Shandong Key Laboratory of Eco-Environmental Science for the Yellow River Delta Shandong University of Aeronautics Institute of materials for energy and Environment State Key Laboratory of Bio-fibers and Eco-textiles College of Materials Science and Engineering Qingdao University

NiMZn/C@melamine sponge-derived carbon（MSDC） composites（M = Co, Fe, and Mn） were prepared by a vacuum pumping solution method followed by carbonization. A large number of carbon nanotubes（CNTs） homogeneously attached to the surfaces of the three-dimensional cross-linked of the sponge-derived carbon in the NiCoZn/C@MSDC composite, and CNTs were detected in the Ni Fe Zn/C@MSDC and NiMnZn/C@MSDC composites. Ni3ZnC0.7,Ni3Fe, and MnO in-situ formed in the NiFeZn/C@MSDC and Ni Mn Zn/C@MSDC composites. The CNTs in the NiCoZn/C@MSDC composite efficiently modulated its complex permittivity. Thus,the composite exhibited the best performance among the composites, with the minimum reflection loss(RLmin) of-33.1 dB at 18 GHz and thickness of 1.4 mm. The bandwidth for RL of ≤-10 dB was up to 5.04 GHz at the thickness of 1.7 mm and loading of 25wt%. The optimized impedance matching, enhanced interfacial and dipole polarization, remarkable conduction loss, and multiple reflections and scattering of the incident microwaves improved the microwave absorption performance. The effects of Co, Ni, and Fe on the phase and morphology provided an alternative way for developing highly efficient and broadband microwave absorbers.

关键词：

Characterization of size-resolved effective density of atmospheric particles in an urban atmosphere in Southern China

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Journal of Environmental Sciences 2024年第7期141卷 194-204页

作者： Tingting Xie Liming Cao Jinyi Zheng Peng Xuan Xiaofeng Huang Laboratory of Atmospheric Observation Supersite School of Environment and EnergyPeking University Shenzhen Graduate SchoolShenzhen 518055China

Effective density(ρ_(eff))is one of the most important physical properties of atmospheric particles,providing important references in exploring the emissions and aging processes of fresh *** this study,a combined system of differential mobility analyzer,centrifugal particle mass analyzer,and condensation particle counter was used to periodically measure theρ_(eff)of atmospheric particles in Shenzhen from Oct.2021 to *** showed that theρ_(eff)of particles with various size presented a bimodal distribution,which could be divided into main density(ρ_(m),main peak,corresponding to relatively dense particles after aging)and sub density(ρ_(s),sub peak,corresponding to fresh particles).The occurrence frequencies ofρ_(s)of particles with diameters of 50 and 80 nm were less than 20%,but were as high as about 40%of that with diameters from 120 to 350 ***ρ_(m)showed increasing trend with the size of particles,whileρ_(s)decreased as the increasing of the size of ***ρ_(eff)on pollution day varied significantly with chemical *** increasing of the proportion of sulfate could promote the increasing ofρ_(eff),while black carbon and organic matter caused opposite effects,which may be related to various factors,including the difference of the material density and morphology of various chemical ***ρ_(eff)of 50,80 and 120 nm particles decreased considerably during the new particle formation event,indicating that organic condensation was an important contributor to new particle growth.

关键词： DMA-CPMA-CPC Effective density Main/sub density Size distribution