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catalytic effect of Transition Metal Complexes of Triaminoguanidine on the Thermolysis of Energetic NC/DEGDN Composite

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火炸药学报 2024年第3期47卷 209-219,I0003页

作者： Mohammed Dourari Ahmed Fouzi Tarchoun Djalal Trache Amir Abdelaziz Roufaida Tiliouine Tessnim Barkat Weiqiang Pang Energetic Materials Laboratory(EMLab) Teaching and Research Unit of Energetic ProcessesEcole Militaire PolytechniqueBP 17Bordj El-Bahri16046AlgiersAlgeria Xi′an Modern Chemistry Research Institute Xi′an 710065China

The transition metal complexes of triaminoguanidine(TAG-M,where M=Cobalt(Co)or Iron(Fe))have been *** catalytic effect of these complexes on the thermolysis of energetic composite based on nitrocellulose and diethylene glycol dinitrate,has been *** characterization of the resulting energetic composites was carried out using scanning electron microscopy(SEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),and differential scanning calorimetry(DSC).Isoconversional kinetic analysis was performed to determine the Arrhenius parameters associated with the thermolysis of the elaborated energetic *** is found that TAG-M complexes have strong catalytic effect on the thermo-kinetic decomposition of NC/DEGDN by decreasing the apparent activation energy and significantly increased the total heat *** models that govern the decomposition processes are also studied,and it is revealed that different reaction processes are accomplished by introduction metal complexes of ***,this study serves as a valuable reference for future research focused on the investigation of catalytic combustion features of solid propellants.

关键词： triaminoguanidine transition metal complexes nitrocellulose diethylene glycol dinitrate catalytic effect

catalytic effect in lithium metal batteries: From heterogeneous catalyst to homogenous catalyst

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Journal of Energy Chemistry 2024年第3期90卷 305-326,I0008页

作者： Haining Fan Xuan-Wen Gao Hailong Xu Yichun Ding Shi-Xue Dou Wen-Bin Luo School of Fashion and Textiles The Hong Kong Polytechnic UniversityHong Kong 100872China Institute for Energy Electrochemistry and Urban Mines Metallurgy School of MetallurgyNortheastern UniversityShenyang 110819LiaoningChina Institute of Energy Materials Science University of Shanghai for Science and TechnologyShanghai 200000China State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710000ShaanxiChina

Lithium metal batteries are regarded as prominent contenders to address the pressing needs owing to the high theoretical *** the broader implementation,the primary obstacle lies in the intricate multi-electron,multi-step redox reaction associated with sluggish conversion kinetics,subsequently giving rise to a cascade of parasitic *** order to smooth reaction kinetics,catalysts are widely introduced to accelerate reaction rate via modulating the energy *** past decades,a large amount of research has been devoted to the catalyst design and catalytic mechanism exploration,and thus the great progress in electrochemical performance has been ***,it is necessary to make a comprehensive review toward key progress in catalyst design and future development *** this review,the basic mechanism of lithium metal batteries is provided along with corresponding advantages and existing challenges detailly *** main catalysts employed to accelerate cathode reaction with emphasis on their catalytic mechanism are summarized as ***,the rational design and innovative direction toward efficient catalysts are suggested for future application in metal-sulfur/gas battery and *** review is expected to drive and benefit future research on rational catalyst design with multi-parameter synergistic impacts on the activity and stability of next-generation metal battery,thus opening new avenue for sustainable solution to climate change,energy and environmental issues,and the potential industrial economy.

关键词： Energy storage and conversion Metal battery Sulfur battery Air battery catalytic effect Heterogeneous catalyst Homogeneous catalyst

catalytic effect of Activated Carbon and Activated Carbon Fiber in Non-Equilibrium Plasma-Based Water Treatment

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Plasma Science and Technology 2008年第3期10卷 358-362页

作者：张延宗郑经堂曲险峰于维钊陈宏刚 State Key Laboratory of Heavy Oil Processing China University of PetroleumDongying 257061 China

Catalysis and regeneration efficiency of granular activated carbon （GAC） and activated carbon fiber （ACF） were investigated in a non-equilibrium plasma water treatment reactor with a combination of pulsed streamer discharge and GAC or ACF. The experimental results show that the degradation efficiency of methyl orange （MO） by the combined treatment can increase 22% （for GAC） and 24% （for ACF） respectively compared to pulsed discharge treatment alone, indicating that the combined treatment has a synergetic effect. The MO degradation efficiency by the combined treatment with pulsed discharge and saturated GAC or ACF can increase 12% and 17% respectively compared to pulsed discharge treatment alone. Both GAC and ACF show catalysis and the catalysis of ACF is prominent. Meanwhile, the regeneration of GAC and ACF are realized in this process. When H202 is introduced into the system, the utilization efficiency of ozone and ultraviolet light is improved and the regeneration efficiency of GAC and ACF is also increased.

关键词： non-equilibrium plasma water treatment activated carbon activated carbon fiber catalytic effect

Kinetics of Carbothermic Reduction of MnO_2 and catalytic effect of La_2O_3

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Journal of University of Science and Technology Beijing 2002年第1期9卷 40-44页

作者： HuiqingTang XingminGuo 等 InstituteofProcessEngineering ChineseAcademyofSciencesBeijing100080 MetallurgySchool UniversityofSciencesandTechnologyBeijingBeijing100083China

Kinetics of carbothermic reduction of manganese oxide and the catalyticeffect of La_2O_3 on the reduction have been studied by the measurement of mass loss in N_2atmosphere at different temperatures and followed by SEM analysis. It is concluded that the kineticsof carbothermic reduction of manganese oxide is divided into three stages: gas diffusioncontrolling stage, carbon gasification con-trolling stage and solid state diffusion controllingstage. La_2O_3 has catalytic effect on the reduction. The catalytic effect of La_2O_3 increases withthe added amount of La_2O_3. SEM analysis shows that the catalytic mechanism is that La_2O_3promotes the transfer of oxygen ions so that carbon gasifying is catalyzed and thus carbothermicreduction of MnO_2 is catalyzed.

关键词： lanthanum oxide carbothermic reduction catalytic effect

A novel route to synthesize diphenylene by the catalytic effect of GaP nanocrystals

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Science China Chemistry 2001年第6期44卷 627-633页

作者：崔得良郝霄鹏于晓强史桂霞徐现刚蒋民华 1. State Key Laboratory of Crystal Materials Shandong University 250100 Jinan China

Diphenylene was synthesized directly from benzene under the catalytic effect of GaP nanocrystals, and the effect of GaP nanocrystals content was studied. The experimental results showed that no reactions took place without GaP nanocrystals. The more the GaP nanocrystals added, the more the reaction complete. Furthermore, at high temperatures (450–480°C), when the content of GaP nanocrystals was high enough, almost all benzene polymerized and the yield of diphenylene was rather high. On the contrast, even if there are enough GaP nanocrystals in the reaction mixture, almost no polymerization reaction took place at low temperature (for example, 250–300°C), and the yield of diphenylene was very poor. The analytical results of XRD, IR, elemental analysis and NMR proved that the sample was truly diphenylene.

关键词： GaP nanocrystals catalytic effect diphenylene

catalytic effect of SCN^- on Electrodeposition of Zinc-Nickle Alloy

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Journal of Shanghai University(English Edition) 2001年第2期5卷 160-163页

作者： FANGZheng－hua YINRen－he 等 DepartmentofChemistry CollegeofScienceShanghaiUniversityShanghai200436China

The electrodeposition of zinc nickle alloy was obtained on a copper cathode of 1×1cm 2. The deposited alloys are quantitatively analyzed by atomic absorption spectrometry. The morphology of the deposits was observed by means of scanning electron microscopy(SEM).We observed that the electrodeposition of zinc nickle alloy is an anomalous codeposition. The catalytic effects of SCN - on the electrochemical behavior of Ni deposition and hydrogen discharge are obvious. SEM analysis shows that the surface morphology of the coating appears to be more compact and homogeneous with the increase of SCN - concentration.

关键词： zinc nickle alloy anomalous codeposition catalytic effect

Synergic catalytic effect of Ti hydride and Nb nanoparticles for improving hydrogenation and dehydrogenation kinetics of Mg-based nanocomposite

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Progress in Natural Science:Materials International 2017年第1期27卷 99-104页

作者： Xiujuan Ma Xiubo Xie Peng Liu Li Xu Tong Liu Key Laboratory of Aerospace Materials and Performance (Ministry of Education) School of Materials Science and Engineering Beihang University State Grid Smart Grid Research Institute Future Science and Technology City Changping

The Mg-9.3 wt%(TiH;-TiH)-0.7 wt% Nb nanocomposite has been synthesized by hydrogen plasma-metal reaction（HPMR） approach to enhance the hydrogen sorption kinetics of Mg at moderate temperatures by providing nanosizing effect of increasing H "diffusion channels" and adding transition metallic catalysts. The Mg nanoparticles（NPs） were in hexagonal shape range from 50 to 350 nm and the average size of the NPs was 177 nm. The small spherical TiH;, TiH and Nb NPs of about 25 nm uniformly decorated on the surface of the big Mg NPs. The Mg-TiH;-TiH-Nb nanocomposite could quickly absorb 5.6 wt% H;within 5 min at 573 K and 4.5 wt% H;within 5 min at 523 K, whereas the pure Mg prepared by HPMR could only absorb 4 and 1.5 wt% H;at the same temperatures. TiH;, TiH and Nb NPs transformed into TiH;and Nb H during hydrogenation and recovered after dehydrogenation process. The apparent activation energies of the nanocomposite for hydrogenation and dehydrogenation were 45.0 and 50.7 kJ mol;, which are much smaller than those of pure Mg NPs, 123.8 and 127.7 kJ mol;. The improved sorption kinetics of the Mg-based nanocomposite at moderate temperatures and the small activation energy can be interpreted by the nanostructure of Mg and the synergic catalytic effects of Ti hydrides and Nb NPs.

关键词： Magnesium Nanocomposite catalytic effect Hydrogen storage

catalytic effect of carbon-based electrode materials in energy storage devices

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Science China Materials 2022年第12期65卷 3229-3242页

作者： Huicong Xia Lingxing Zan Yifan Wei Kai Guo Wenfu Yan Dehui Deng Jia-Nan Zhang School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China 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 Key Laboratory of Advanced Energy catalytic and Functional Material Preparation of Zhengzhou City Zhengzhou 450012China

The catalytic effect of electrode materials is one of the most crucial factors for achieving efficient electrochemical energy conversion and ***-based metal composites were widely synthesized and employed as electrode materials because of their inherited outstanding ***,electrode materials can provide a higher capacity than the anticipated values,even beyond the theoretical *** origin of the extra capacity has not yet been explained accurately,and its formation mechanism is still ***,we first summarized the current research progress and drawbacks in energy storage devices(ESDs),and elaborated the role of catalytic effect in enhancing the performance of ESDs as follows:promoting the evolution of the solid electrolyte interphase(SEI),accelerating the reversible conversion of discharge/charge products,and improving the conversion speed of the intermediate and the utilization rate of the active materials,thereby avoiding the shuttling ***,a particular focus was placed on the interaction between the catalytic effect and energy storage performance in order to highlight the efficacy and role of the catalytic *** hope that this review could provide innovative ideas for designing the electrode materials with an efficient catalytic effect for ESDs to promote the development of this research field.

关键词： carbon-based metal composites catalytic effect reversible conversion energy storage devices

Synthesis of Co Nanoparticles and Their catalytic effect on the Decomposition of Ammonium Perchlorate

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Chinese Journal of Chemical Engineering 2008年第2期16卷 325-328页

作者：段红珍蔺向阳刘冠鹏徐磊李凤生 School of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 China Department of Chemistry School of Science North University of China Taiyuan 030051 China

The monodispersed Co nanoparticles were successfully prepared by means of hydrogen plasma method in inert atmosphere. The particle size, specific surface area, crystal structure and morphology of the samples were characterized by transmission electron microscopy （TEM）, BET equation, X-ray diffraction （XRD）, and the corresponding selected area electron diffraction （SAED）. The catalytic effect of Co nanoparticles on the decomposition of ammonium perchlorate （AP） was investigated by differential thermal analyzer （DTA）. Compared with the thermal decomposition of pure AP, the addition of Co nanoparticles （2%-10%, by mass） decreases the decomposition temperature of AP by 145.01-155.72℃. Compared with Co3O4 nano-particles and microsized Co particles, the catalytic effect of Co nanoparticles for AP is stronger. Such effect is attributed to the large specific surface area and its interaction of Co with decomposition intermediate gases. The present work provides useful information for the application of Co nanoparficles in the AP-based propellant.

关键词： Co nanoparticle ammonium perchlorate hydrogen plasma method catalytic effect decomposition