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An efficient microreactor with continuous serially connected micromixers for the synthesis of superparamagnetic magnetite nanoparticles

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Chinese Journal of chemical engineering 2023年第7期59卷 85-91页

作者： Wenting Fan Fang Zhao Ming Chen Jian Li Xuhong Guo State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China International Joint Research Center of Green Energy Chemical Engineering Shanghai 200237China

A new microreactor with continuous serially connected micromixers(CSCM)was tailored for the coprecipitation process to synthesize Fe_(3)O_(4) *** simulation reveals that the two types of CSCM microchannels(V-typed and U-typed)proposed in this work exhibited markedly better mixing performances than the Zigzag and capillary microchannels due to the promotion of Dean *** mixing was achieved in the V-typed microchannel in 2.7 s at an inlet Reynolds number of ***_(3)O_(4) nanoparticles synthesized in a planar glass microreactor with the V-typed microchannel,possessing an average size of 9.3 nm and exhibiting superparamagnetism,had obviously better dispersity and uniformity and higher crystallinity than those obtained in the capillary *** new CSCM microreactor developed in this work can act as a potent device to intensify the synthesis of similar inorganic nanoparticles via multistep chemical precipitation processes.

关键词： Microreactor Continuous serially connected micromixers Mixing Nanoparticles

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Reductive amination of n-hexanol to n-hexylamine over Ni-Ce/γ-Al_(2)O_(3) catalysts

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Frontiers of chemical Science and engineering 2023年第1期17卷 82-92页

作者： Pengfei Li Huijiang Huang Zheng Wang Ziying Hong Yan Xu Yujun Zhao School of Chemical Engineering and Technology Tianjin UniversityKey Laboratory for Green Chemical Technology of Ministry of EducationTianjin 300072China

The amination of alkyl alcohols is one of the most promising paths in synthesis of aliphatic ***,cerium doped nickel-based catalysts were synthesized and tested in a gas-phase amination of n-hexanol to *** was found that the activity of the Ni/γ-Al_(2)O_(3)catalyst is significantly improved by doping an appropriate amount of *** presence of cerium effectively inhibits the agglomeration of nickel particle,resulting in better Ni *** Ni particle size plays critical role on the catalytic activity,higher turnover frequency of n-hexanol amination was *** doping also improves the reduction ability of nickel and enhances the interactions between Ni and the catalyst *** weak acid sites were also found in those cerium doped catalysts,which promote another key step—ammonia dissociative adsorption in this reaction *** overall synergy of Ni nanoparticles and acid sites of this Ni-Ce/γ-Al_(2)O_(3)catalyst boosts its superior catalytic performance in the amination of n-hexanol.

关键词： amination alcohol cerium nickel acidity interaction

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Freestanding 1T MoS_(2)@MXene hybrid film with strong interfacial interaction for highly reversible zinc ions storage

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Journal of Materials Science & technology 2024年第21期188卷 183-190页

作者： Haonan Zhai Huibin Liu Yufen Zhang Jinjin Wen Wenyue Yang Huiting Xu Xiaoteng Yan Wenchao Peng Jiapeng Liu School of Chemical Engineering and Technology National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources UtilizationHebei University of TechnologyTianjin 300130China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China

Aqueous zinc ion batteries(AZIBs)are now gaining widespread attention because of their costeffectiveness,intrinsic saf ety,and high theoretical ***,it is still crucial to exploit highperformance electrode ***,the freestanding 1T MoS_(2)@Mxene hybrid films(MMHF)were synthesized and directly served as the cathode of *** freestanding MMHF exhibited the hierarchical layer structure with excellent conductivity and strong interfacial interaction,which promoted the exposure of more active sites and the transfer of electrons/***,the MMHF displayed a high specific capacity of 270 mAh g^(-1)(at 0.1 A g^(–1))and good rate ***,even after 2500 cycles under 10 A g^(-1),the freestanding MMHF cathode contributed a superior specific capacity of 108 mAh g^(-1)with an outstanding capacity retention rate of 94.7%.Meanwhile,the energy storage mechanism of the MMHF electrode was also elucidated through ex-situ ***,the density functional theory(DFT)computations revealed the strong interfacial interactions between 1T MoS_(2)and MXene,high conductivity,and low Zn^(2+)diffusion *** work provides a new viewpoint for designing freestanding transition metal disulfides(TMDs)-MXene hybrid film electrodes for AZIBs.

关键词： Aqueous zinc ion batteries Freestanding cathode Interfacial interaction 1T MoS_(2) MXene

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Construction of metal-organic frameworks with unsaturated Cu sites for efficient and fast reduction of nitroaromatics:A combined experimental and theoretical study

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Chinese chemical Letters 2024年第8期35卷 514-519页

作者： Longlong Geng Huiling Liu Wenfeng Zhou Yong-Zheng Zhang Hongliang Huang Da-Shuai Zhang Hui Hu Chao Lv Xiuling Zhang Suijun Liu Shandong Provincial Key Laboratory of Monocrystalline Silicon Semiconductor Materials and Technology College of Chemistry and Chemical EngineeringDezhou UniversityDezhou 253023China School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255000China State Key Laboratory of Separation Membranes and Membrane Processes School of Chemical Engineering and TechnologyTiangong UniversityTianjin 300387China School of Chemistry and Chemical Engineering Jiangxi Provincial Key Laboratory of Functional Molecular Materials ChemistryJiangxi University of Science and TechnologyGanzhou 341000China

Metal-organic frameworks(MOFs)functionalized with open metal sites(OMSs)have received widespread attention in various applications due to their fascinating electronic properties and unique interactions with guest ***,rational tailoring of the coordination environment of metal nodes dur-ing the synthesis of MOFs remains a great challenge due to their tendency of saturated coordination with ***,we reported the construction of three new MOFs featuring unsaturated Cu(Ⅱ)sites,namely[Cu(HCOO)(pzta)]_(n)(HL-1),{[Cu(PTA)0.5(pzta)(H_(2)O)]·2H_(2)O}_(n)(HL-2)and[Cu(NA)0.5(pzta)]_(n)(HL-3)(Hpzta=3-pyrazinyl-1,2,4-triazole;PTA=terephthalic acid;NA=1,4-naphthalene dicarboxylic acid),based on the mixed-linker strategy via specific selection of versatile Hpzta ligand and carboxylate ***-markably,the obtained MOFs exhibited excellent activity and good recyclability for the catalytic reduction of nitroaromatics under mild conditions(25℃and 1 atm).In particular,the complete conversion of 4-nitrophenol(4-NP)took only 30 s on HL-2,reaching a record-high TOF value compared with previously reported metal *** combined experimental and theoretical studies on HL-2 revealed that the open Cu site with positive-charged nature could improve the adsorption and subsequent electron trans-port between the substrates,and was responsible for the outstanding *** work shined lights on the further enhancement of performance for MOFs through rational OMSs construction.

关键词： Metal-organic frameworks Open metal sites Catalysis Copper node 4-Nitrophenol

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Palladium-Catalyzed anti-Markovnikov Halosulfonamidation of Unactivated Alkene

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Chinese Journal of Chemistry 2024年第5期42卷 464-470页

作者： Bowen Wang Jianxiao Li Wanqing Wu Huanfeng Jiang State Key Laboratory of Pulp and Paper Engineering Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhouGuangdong510641 China

Palladium-catalyzed regioselective amination of unactivated alkene remains a challenge and is of great ***,a three-component coupling of unactivated alkene,sulfonamide,and N-halo compounds accessing vicinal haloamine has been *** aminohalogenation represents a modular and regioselective *** electrophilic halogenating agent enables regioselective anti-Markovnikov aminopalladation and facilitates subsequent halogenation *** this protocol is characterized by gram-scale syntheses and late-stage *** note,the recovered byproduct phthalimide allows for reusing by conversion to the starting material.

关键词： Unactivated alkene anti-Markovnikov aminopalladation Vicinal haloamine Palladium catalysis Halosulfonamidation Selectivity N-Halo compounds

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Atomic cerium-doped CuO_(x) catalysts for efficient electrocatalytic CO_(2) reduction to CH_(4)

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Chinese chemical Letters 2025年第1期36卷 326-331页

作者： Xiangyu Chen Aihao Xu Dong Wei Fang Huang Junjie Ma Huibing He Jing Xu Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi UniversityNanning 530004China State Key Laboratory of Green Chemical Engineering and Industrial Catalysis School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

Copper(Cu)is widely used in the electrochemical carbon dioxide reduction reaction(ECO_(2)RR)for efficient methane(CH_(4))***,the morphology and valence of Cu-based catalysts are usually unstable under reaction *** this work,we prepared Ce-doped MOF-199 precursor(Ce/HKUST-1)and further obtained nanoparticle electrocatalyst Ce/CuO_(x)-NPs by cyclic voltammetry(CV)*** Faradic efficiency of methane(FE_(CH_(4)))maintains above 62%within a broad potential window of 350 mV and the maximum FE_(CH_(4))reaches 67.4%with a partial current density of 293 mA/cm^(2)at-1.6 V vs.a reversible hydrogen *** characterization and theoretical calculations revealed that the unique electronic structure and large ionic radius of Cerium(Ce)not only promoted the generation of key intermediate*CO but also lowered energy barrier of the*CO to*CHO *** study provides a novel and efficient catalyst for methane production in ECO_(2)RR and offers profound insights into constructing high performance Cu-based catalysts.

关键词： ECO_(2)RR Cu-based catalyst Structure evolution DFT calculation

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Optimization of LiB electrode with bi-diameter active particles using a microstructure-resolved model

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Particuology 2024年第12期95卷 49-61页

作者： Peng Zhang Junqi Weng Ping Li Guanghua Ye Wenli Du Xinggui Zhou Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai200237China BASF(China)Company Ltd. Shanghai200137China State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai200237China

The microstructure of electrodes significantly affects the performance of lithium-ion batteries(LiBs),and using bi-diameter active particles is a simple but effective way to regulate the microstructure of commercial LiB ***,to optimize the LiB cathode of bi-diameter active particles,a microstructure-resolved model is developed and *** results indicate that randomly packing of bi-diameter active particles is optimal when the electrolyte diffusion limitation is mild,as it provides the highest volume fraction of active *** strong electrolyte diffusion limitations,layered packing with small particles near the separator is *** is because particles near the current collector have a low lithiation ***,optimizing the random packing can further improve the energy *** energy-oriented LiBs,a low volume fraction of small particles(0.2)is preferred due to the higher volume fraction of active *** power-oriented LiBs,a high volume fraction of small particles(0.8)is better because it reduces diffusion *** work should serve to guide the optimal design of electrode microstructure for achieving high-performance LiBs.

关键词： Lithium-ion battery Electrode microstructure Bi-diameter particles Diffusion limitation Microstructure-resolved model

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Highly robust zinc metal anode directed by organic–inorganic synergistic interfaces for wearable aqueous zinc battery

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SmartMat 2024年第1期5卷 135-146页

作者： Xixi Zhang Chuanlin Li Guangmeng Qu Chenggang Wang Shunshun Zhao Tongkai Wang Na Li Xiaojuan Li Xijin Xu School of Physics and Technology University of JinanJinanChina School of Chemistry and Chemical Engineering Shandong UniversityJinanChina State Key Laboratory of Chemical Resource Engineering Beijing Key Laboratory of Electrochemical Process and Technology of MaterialsBeijing University of Chemical TechnologyBeijingChina

Flexible aqueous zinc batteries(FAZBs)with high safety and environmental friendliness are promising smart power sources for smart wearable ***,the bare zinc anode usually suffers from damnable dendrite growth and rampant side reaction on the surface,greatly impeding practical applications in ***,a composite polymer interface layer is artificially self‐assembled on the surface of the zinc anode by graft‐modified fluorinated monomer(polyacrylic acid‐2‐(Trifluoromethyl)propenoic acid,PAA‐TFPA),on which an organic–inorganic hybrid(PAA‐Zn/ZnF2)solid electrolyte interface(SEI)with excellent ionic conductivity is formed by interacting with Zn2+.Both the pouch cell and fiber zinc anode exhibit excellent plating/stripping reversibility after protecting by this organic–inorganic SEI,which can be stably cycled more than 3000 h in symmetric Zn||Zn cells or 550 h in fiber Zn||Zn ***,this interface layer preserves zinc anode with excellent mechanical durability under various mechanical deformation(stably working for another 1200 h after bending 100 h).The corresponding PAA‐Zn/ZnF2@Zn||MnO2 full cell displays an ultra‐long life span(79%capacity retention after 3000 cycles)and mechanical robustness(85%of the initial capacity for another 3000 cycles after bending 100 times).More importantly,the as‐assembled cells can easily power smart wearable devices to monitor the user's health condition.

关键词： hybrid SEI mechanical durability wearable zinc battery zinc anode

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From Static and Dynamic Perspectives:A Survey on Historical Data Benchmarks of Control Performance Monitoring

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IEEE/CAA Journal of Automatica Sinica 2025年第2期12卷 300-316页

作者： Pengyu Song Jie Wang Chunhui Zhao Biao Huang the State Key Laboratory of Industrial Control Technology College of Control Science and Engineering Zhejiang University IEEE the Department of Chemical and Materials Engineering University of Alberta

In recent decades, control performance monitoring(CPM) has experienced remarkable progress in research and industrial applications. While CPM research has been investigated using various benchmarks, the historical data benchmark(HIS) has garnered the most attention due to its practicality and effectiveness. However, existing CPM reviews usually focus on the theoretical benchmark, and there is a lack of an in-depth review that thoroughly explores HIS-based methods. In this article, a comprehensive overview of HIS-based CPM is provided. First, we provide a novel static-dynamic perspective on data-level manifestations of control performance underlying typical controller capacities including regulation and servo: static and dynamic properties. The static property portrays time-independent variability in system output, and the dynamic property describes temporal behavior driven by closed-loop feedback. Accordingly,existing HIS-based CPM approaches and their intrinsic motivations are classified and analyzed from these two ***, two mainstream solutions for CPM methods are summarized, including static analysis and dynamic analysis,which match data-driven techniques with actual controlling behavior. Furthermore, this paper also points out various opportunities and challenges faced in CPM for modern industry and provides promising directions in the context of artificial intelligence for inspiring future research.

关键词： Control performance monitoring (CPM) data-driven method historical data benchmark (HIS) industrial process performance index static and dynamic analysis

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Strategic regulation of nitrogen-containing intermediates for enhanced nitrate reduction over Co_(3)O_(4)/SiC catalyst having multiple active centers

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Journal of Energy Chemistry 2024年第9期96卷 291-299页

作者： Ming-Hao Guan Hao-Nan Xu Jin Liu Tao Wu An-Hui Lu State Key Laboratory of Fine Chemicals Liaoning Key Laboratory for Catalytic Conversion of Carbon ResourcesSchool of Chemical EngineeringDalian University of TechnologyDalian 116024LiaoningChina

Regulating the intermediates involved in the electrocatalytic nitrate reduction reaction(NO_(3)RR)is crucial for the enhancement of reaction ***,it remains a great challenge to regulate the reaction intermediates through active site manipulation on the surface of the ***,a family of n%-Co_(3)O_(4)/SiC(n=5,8,12,20)catalysts with a delicate percentage of Co^(2+)and Co^(3+)were prepared for NO_(3)*** found that Co^(3+)primarily acts as the active site for NO_(3)^(−)reduction to NO_(2)^(−),while Co^(2+)is responsible for the conversion of NO_(2)^(−)to NH_(3).Moreover,the conversion of these intermediates over the active sites is autonomous and separately *** processes synergistically accomplish the reduction of nitrate ions to synthesize *** the experimental studies and density functional theory(DFT)calculations,it is discovered the pathway(^(*)NHO→^(*)NHOH→^(*)NH_(2)OH→^(*)NH_(2)→^(*)NH_(3))is more favorable due to the lowerΔG value(0.25 eV)for the rate-limiting step(^(*)NO→^(*)NHO).The NH_(3)yield rate of 8%-Co_(3)O_(4)/SiC reached 1.08 mmol/(cm^(2)h)with a Faradaic efficiency of 96.4%at−0.89 V versus the reversible hydrogen electrode(RHE),surpassing those of most reported non-noble NO_(3)RR *** strategy not only provides an efficient catalyst for NO_(3)RR but also serves as an illustrative model for the regulation of multi-step reaction intermediates through the design of distinct active sites,thereby presenting a new approach to enhance the efficiency of intricate reactions.

关键词： Electrocatalysis Nitratereduction Co_(3)O_(4)/SiC catalysts Intermediates control

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