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Synthesis of methanol via CO_(2) hydrogenation catalyzed by La_(2)O_(2)CO_(3)/Cu catalysts

Nano Research 2025年第2期18卷 153-163页

作者： Jun He Chenglong Yu Zhijuan Zhao Bo Guan Bin Zhang Yanru Zhang Longbo Zhang Yanyan Wang Ying Wang Yahui Wu Jia Guo Yang Li Tianbin Wu Qingli Qian Hongxing Wang Buxing Han Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and ThermodynamicsCenter for Carbon Neutral ChemistryInstitute of ChemistryChinese Academy of SciencesBeijing 100190China College of Chemical Engineering and Materials Science Tianjin University of Science and TechnologyTianjin 300457China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China Center for Physicochemical Analysis Measurements Institute of ChemistryChinese Academy of SciencesBeijing 100190China Shanghai Key Laboratory of Green Chemistry and Chemical Processes State Key Laboratory of Petroleum Molecular and Process EngineeringSchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062China

The development of efficient Cu-based heterogeneous catalysts for CO_(2) hydrogenation to methanol has been an appealing *** by the concept of inverse catalysts,a series of La_(2)O_(2)CO_(3)/Cu nanorod composites with varying Cu contents(denoted as LOC/Cu-x,where x stands for the mass ratio of La and Cu in the catalysts)were prepared by combining coprecipitation and calcination *** composition-dependence of catalytic activity and selectivity were observed when different LOC/Cu-x(x=0.1,0.2,0.5,1,3 and 5)were used to catalyze the CO_(2) *** predominant product shifted from methane to methanol with the increasing Cu *** highest reaction rate(13.3 mmol·gCu^(-1)·h^(-1))and methanol selectivity(85.5%)were achieved when LOC/Cu-1 was tested at 200℃.The LOC was not active for the reaction,while the Cu itself displayed poor catalytic *** Cu–LOC interactions significantly affected the nature of the catalysts,including mutual electron transfer,crystal structure,morphology,porosity,surface Cu valence and capability of adsorbing the reactant gases,etc.,which account for the outstanding behavior of the LOC/Cu-1 *** work provides a new strategy for the design and optimization of Cu-based catalysts.

关键词： CO_(2)hydrogenation methanol heterogeneous catalysts Cu-La_(2)O_(2)CO_(3)(LOC)interaction

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Recent Advances of Electrocatalysts and Electrodes for Direct Formic Acid Fuel Cells:from Nano to Meter Scale Challenges

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Nano-Micro Letters 2025年第6期17卷 482-531页

作者： Yang Li Ming-Shui Yao Yanping He Shangfeng Du School of Chemical Engineering University of BirminghamBirmingham B152TTUK Department of Chemical Engineering Loughborough UniversityLoughboroughLeicestershire LE113TUUK State Key Laboratory of Mesoscience and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190People’s Republic of China University of the Chinese Academy of Sciences Beijing 100049People’s Republic of China School of Chemical Engineering Kunming University of Science and TechnologyKunming 650504People’s Republic of China

Direct formic acid fuel cells are promising energy devices with advantages of low working temperature and high safety in fuel storage and *** have been expected to be a future power source for portable electronic *** technology has been developed rapidly to overcome the high cost and low power performance that hinder its practical application,which mainly originated from the slow reaction kinetics of the formic acid oxidation and complex mass transfer within the fuel cell ***,we provide a comprehensive review of the progress around this technology,in particular for addressing multiscale challenges from catalytic mechanism understanding at the atomic scale,to catalyst design at the nanoscale,electrode structure at the micro scale and design at the millimeter scale,and finally to device fabrication at the meter *** gap between the highly active electrocatalysts and the poor electrode performance in practical devices is ***,perspectives and opportunities are proposed to potentially bridge this gap for further development of this technology.

关键词： Direct formic acid fuel cell Electrocatalyst Electrode Formic acid oxidation Mass transfer

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Dual Perspective Secure Analysis for Local Estimate-Based FDI Attacks in Networked Systems

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IEEE Transactions on Systems, Man, and Cybernetics: Systems 2025年第5期55卷 3312-3325页

作者： Qu, Fuyi Liu, Hao Tan, Cheng Li, Yuzhe Shenyang Ligong University School of Automation and Electrical Engineering Shenyang110159 China Northeastern University State Key Laboratory of Synthetical Automation for Process Industries Shenyang110819 China Wuhan Institute of Technology School of Electrical and Information Engineering Wuhan430205 China Qufu Normal University School of Engineering Rizhao276800 China

This article discusses the security concerns related to networked systems, where the sensor sends the local estimate to the remote estimator, which may be attacked. Traditionally, in the remote state estimation with the innovation or raw measurement case, denial of service (DoS) and false data injection (FDI) attacks are investigated thoroughly. Notably, for remote state estimation with local estimate cases considered in this article, most existing works consider DoS attacks but not FDI attacks, negatively affecting remote state estimation performance. Furthermore, current detection mechanisms encounter challenges when identifying such attacks due to the unavailable innovation or raw measurement. As such, we study FDI attacks under this framework and provide the corresponding secure analysis using a dual-perspective approach. Specifically, we propose a detector to detect such attacks using the prior information extracted from the remote estimator. Then, we analyze the existence of stealthy attacks and characterize the corresponding performance evaluation for the remote estimation under such attacks. Following this, we construct the optimal attack scheme, maximizing the expected average and terminal estimation error covariances, respectively. To reduce the above vulnerability, we develop a co-design transmission strategy and offer an analytical detection performance evaluation under different attack scenarios. Finally, simulations are provided to illustrate the proposed results. © 2025 IEEE.

关键词： Detectors state estimation Technological innovation Security Current measurement Communication system security Wireless networks Kalman filters Hands Estimation error

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Laser-enhanced high-magnification telecentric imaging system for multiphase flow monitoring in membrane fouling

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Chinese Journal of Chemical engineering 2025年 82卷 25-38页

作者： Haohan Xu Hu Liang Xin Feng Weipeng Zhang Xiaoxia Duan Jie Chen Chao Yang State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 China

Membrane fouling is the primary resistance to the continuous production of stirred membrane reactors. This work presents a laser-enhanced high-magnification telecentric imaging system (LEHTIS), which uses a high-magnification telecentric lens and laser-enhanced illumination to invasively capture the motion of particles on the membrane surface or near the membrane. The problems of working distance and particle interference in the stirred membrane reactor are solved to achieve the purpose of in-situ monitoring of membrane fouling. This method is suitable for high flow rates, high solid holdup, and small particle size systems, and the dynamic motion and accumulation of particles are preliminarily analyzed. It shows that the accumulation and desorption of particles on the membrane surface are related to the physical properties of the membrane surface. There is an intermittent rotational movement in the flow field near the membrane, and it tends to stabilize over time. The filtration process can be assessed by monitoring changes in the overall velocity and acceleration of particles near the membrane. The analysis of forces acting on individual particles is compared and validated with the force balance model to correct and accurately apply it to stirred membrane reactors. The development of LEHTIS provides an effective tool for in-situ monitoring of membrane fouling and optimizing the stirred membrane reactors for industrial applications.

关键词： Chemical industry

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Revealing Hetero-Deformation Induced(HDI)Hardening and Dislocation Activity in a Dual-Heterostructure Magnesium Matrix Composite

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Journal of Magnesium and Alloys 2025年第2期13卷 902-921页

作者： Lingling Fan Ran Ni Lingbao Ren Peng Xiao Ying Zeng Dongdi Yin Hajo Dieringa Yuanding Huang Gaofeng Quan Wei Feng School of Mechanical Engineering Chengdu UniversitySichuanChengdu 610106PR China School of Materials Science and Engineering Southwest Jiaotong UniversitySichuanChengdu 610031PR China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi'an Jiaotong UniversityShanxiXi'an 710049PR China Institute of Material and Process Design Helmholtz-Zentrum HereonGeesthacht 21502Germany Institute of Metallic Biomaterials Helmholtz-Zentrum HereonGeesthacht 21502Germany

Integrating a heterogeneous structure can significantly enhance the strength-ductility synergy of ***,the relationship between hetero-deformation induced(HDI)strain hardening and dislocation activity caused by heterogeneous structures in the magnesium matrix composite remains *** this study,a dual-heterogeneous TiC/AZ61 composite exhibits significantly improved plastic elongation(PEL)by nearly one time compared to uniform FG composite,meanwhile maintaining a high strength(UTS:417 MPa).This is because more severe deformation inhomogeneity in heterogeneous structure leads to more geometrically necessary dislocations(GNDs)accumulation and stronger HDI stress,resulting in higher HDI hardening compared to FG and CG *** the early stage of plastic deformation,the pile-up types of GND in the FG zone and CG zone are significantly *** tend to form substructures in the FG zone instead of the CG *** only accumulate at grain boundaries of the CG region,thereby leading to obviously increased back stress in the CG *** the late deformation stage,the elevated HDI stress activates the new〈c+a〉dislocations in the CG region,resulting in dislocation entanglements and even the formation of substructures,further driving the high hardening in the heterogeneous ***,For CG composite,〈c+a〉dislocations are not activated even under large plastic strains,and only〈a〉dislocations pile up at grain boundaries and twin *** work provides an in-depth understanding of dislocation variation and HDI hardening in heterogeneous magnesium-based composites.

关键词： Mg-matrix composite Heterogeneous structure HDI hardening GND density Dislocation

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engineering of Fe d-band center in Fe_(3)O_(4)/CeO_(2)hetero-nanoparticles via orbital coupling for high-efficiency oxygen reduction electrocatalysis

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Nano Research 2025年第1期18卷 129-139页

作者： Jiayi Liu Jingwen Yin Yingzi Lin Mingxin Pang Huan Pang Songtao Zhang Lin Xu Jun Yang Yawen Tang Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023Chin a 2 State Key Laboratory of Multiphase Complex Systems Center of MesoscienceInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009China Testing Center Yangzhou UniversityYangzhou 225009China

The deliberate engineering of the d-band center of metal site represents an effective strategy to boost the intrinsic electrocatalytic performance toward the oxygen reduction reaction(ORR).Herein,following a heterointerfaceinduced orbital coupling rationale,we report a judicious design of an efficient ORR electrocatalyst consisting of Fe_(3)O_(4)/CeO_(2)hetero-nanoparticles in-situ encased into N-doped carbon nanofibers(abbreviated as Fe_(3)O_(4)/CeO_(2)@N-CNFs hereafter).The theoretic calculations uncover that the Fe_(3)O_(4)/CeO_(2)heterointerface-triggered orbital coupling can cause the down shift of the d-band center positions of Fe sites,which leads to the weakened chemisorption of oxygenated groups and lowered energy barrier for the potential-determining step,ultimately dramatically boosting the ORR intrinsic *** a consequence,the well-designed Fe_(3)O_(4)/CeO_(2)@N-CNFs display admirable ORR activity with a half-wave potential of 0.84 V and outstanding structural/electrochemical stability in an alkaline electrolyte,surpassing the commercial Pt/C benchmark and a majority of recently reported Fe_(3)O_(4)-based *** encouragingly,the Fe_(3)O_(4)/CeO_(2)@N-CNFsincorporated Zn-air battery outperforms the Pt/C-assembled counterpart with higher power density,larger energy density,and excellent cycling stability,serving as a competent candidate for ORR-involved renewable energy *** study offers an innovative approach for the rational manipulation of the d-band center and interfacial electron behavior of active sites toward the optimization of electrocatalytic performance.

关键词： hetero-nanoparticles electrospinning interfacial engineering orbital coupling oxygen reduction reaction

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Backstepping Control With Tunable Transformation Parameters for a Coupled PDE Rijke Tube With Boundary Input Delay

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IEEE Transactions on Automation Science and engineering 2025年 22卷 12583-12595页

作者： Ma, Dan Xing, Yuqian Liu, Yanyan Lin, Hongjun Northeastern University State Key Laboratory of Synthetical Automation for Process Industries College of Information Science and Engineering Shenyang110819 China Research Institute of Aero-Engine Beihang University Beijing100191 China Shenyang Engine Research Institute AECC Shenyang110015 China

In this paper, the active control problem for thermoacoustic instability in the Rijke tube is investigated. First of all, the first-order hyperbolic partial differential equations (PDEs) for one-dimensional compressible gas dynamics, combined with the Heckl heat release model, are proposed to describe the unstable thermoacoustic system in the Rijke tube. For the dynamic system, the decoupling of the nonlinear heat release with delayed velocity fluctuation and the acoustic field, along with the boundary input delay, is addressed. Secondly, the transport PDE is used to represent the boundary input delay. This transforms the unstable thermoacoustic system into a cascaded form of the transport equation and linear hyperbolic PDEs, resulting in a system of 5\times 5 first-order linear hyperbolic PDEs. Then, due to the limitations of the existing backstepping control method for this system, a novel backstepping control approach with tunable parameters is proposed to stabilize the system. Next, a boundary feedback controller with optimized transformation parameters is designed by solving a programming problem to exponentially stabilize the unstable thermoacoustic system with boundary input delay in the Rijke tube. Finally, the effectiveness of the proposed approach is verified through a numerical simulation using a Rijke tube. © 2004-2012 IEEE.

关键词： Backstepping

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Peptide Coacervates: Formation, Mechanism, and Biological Applications

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ACS Applied Materials and Interfaces 2025年第19期17卷 27697-27712页

作者： Yuan, Jiewei Yang, Yufan Dai, Ke Fakhrullin, Rawil Li, Hong Zhou, Peng Yuan, Chengqian Yan, Xuehai College of Chemistry and Chemical Engineering Xi’an Shiyou University Xi’an710065 China State Key Laboratory of Biopharmaceutical Preparation and Delivery Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China Institute of Fundamental Medicine and Biology Kazan Federal University Republic of Tatarstan Kazan420008 Russia

Biomolecular coacervates, dynamic compartments formed via liquid-liquid phase separation (LLPS), are essential for orchestrating intracellular processes and have emerged as versatile tools in bioengineering. Peptides, with their modular amino acid sequences, exhibit unique potential in coacervate design due to their ability to undergo LLPS while offering precise control over molecular architecture and environmental responsiveness. Their simplicity, synthetic accessibility, and tunability make peptide-based coacervates particularly attractive for biomedical and materials applications. However, the formation and stability of these systems depend on a delicate balance of intrinsic factors (e.g., sequence charge, hydrophobicity, and chain length) and extrinsic conditions (e.g., pH, ionic strength, and temperature), necessitating a deeper understanding of their interplay. This review synthesizes recent advances in the molecular mechanisms driving peptide coacervation, emphasizing how sequence design and environmental cues govern phase behavior. We further highlight groundbreaking applications, from drug delivery platforms to protocell mimics, and discuss strategies to translate mechanistic insights into functional materials. By bridging fundamental principles with innovative applications, this work aims to accelerate the development of peptide coacervates as programmable, multifunctional systems, offering a roadmap for next-generation biochemical technologies. © 2025 American Chemical Society.

关键词： LLPS biomaterials molecular design peptide coacervate stability

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Efficient CO2 electroreduction to n-propanol on a matching cobalt phthalocyanine/copper tandem catalyst

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Green Chemistry 2025年第19期27卷 5449-5454页

作者： Chen, Chunjun Wang, Min Zhang, Yichi Yang, Xue Zou, Kang Lin, Wei He, Mingyuan Wu, Haihong Han, Buxing Shanghai Key Laboratory of Green Chemistry and Chemical Processes State Key Laboratory of Petroleum Molecular & Process Engineering School of Chemistry and Molecular Engineering East China Normal University Shanghai200062 China Institute of Eco-Chongming Chongming District Shanghai202162 China State Key Laboratory of Petroleum Molecular and Process engineering SKLPMPE Sinopec Research Institute of Petroleum Processing Co. LTD. Beijing100083 China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid and Interface and Thermodynamics CAS Research/Education Center for Excellence in Molecular Sciences Center for Carbon Neutral Chemistry Institute of Chemistry Chinese Academy of Sciences Zhongguancun North First Street 2 Beijing100190 China

Electroreduction of CO2 into n-propanol is a promising strategy to mitigate energy and environmental problems. However, achieving high selectivity of n-propanol at high current density remains a challenge. In this work, we report an efficient tandem catalyst by combining cobalt phthalocyanine coordinating with tetrahydrofuran (CoPc-THF) and CuO derived Cu (OD-Cu). The selectivity of n-propanol was enhanced over CoPc-THF/OD-Cu tandem catalysts, and the faradaic efficiency (FE) of n-propanol reached up to 16.8% with a current density of 170 mA cm−2. It was demonstrated that CO2 could be converted into CO over CoPc-THF with nearly 100% FE in a wide potential range, which enhances the CO coverage on OD-Cu at a high potential, resulting in high selectivity of n-propanol. © 2025 The Royal Society of Chemistry.

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Self-woven ionogel textile from beads-on-string fibers for highly sensitive sensor using a self-generated mold strategy

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Chemical engineering Journal 2025年 513卷

作者： Zhao, Zhimin Jiang, Haiyan Yuan, Hanmeng Gao, Hongshuai Nie, Yi Beijing Key Laboratory of Ionic Liquids Clean Process State Key Laboratory of Mesoscience and Engineering CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China College of Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China Zhengzhou Institute of Emerging Industrial Technology Zhengzhou450000 China

Traditional ionogel film-based sensors are expected to be replaced by textile-based sensor, which have superior air permeability, softness, and sensitivity. However, ionogel fibers are difficult to be produced continuously, and the signal transmission of fiber-woven textile sensors are not stable enough. Herein, a self-generated mold strategy is proposed to continuously fabricate beads-on-string ionogel fibers and the self-woven ionogel textile. The regenerated cellulose (RCE) string mold is firstly generated due to the rapid phase separation of the cellulose from ionic liquid (IL), and it supports the formation of calcium alginate (CA) bead mold according to Plateau-Rayleigh instability principle. The subsequent slow formation of the polyvinyl alcohol (PVA) network in the beads-on-string fiber mold further enhances the string's mechanical properties (up to 1.79 MPa tensile strength and 104.72 % elongation), and realize the self-weaving of ionogel textile by welding the beads on adjacent beads-on-string fibers. The self-woven ionogel textile showed superior electrical conductivity (6.12 mS cm−1), outstanding strain sensitivity (GF = 11.32), and remarkable compression and stretch stability (3000 times), realizing its successful application in multi-scenario sensing monitoring such as human joint movements, swallowing, and pulse activities. Interestingly, the textile can not only display stretching deformations like normal film sensors, but also can undergo string vibration deformations due to the special beads-on-string structure, enabling novel contactless detection of human respiration and speech. This work provides an example for the large-scale production of ionogel fibers and offers a promising solution for designing ionogel textile sensors with stable performance. © 2025 Elsevier B.V.

关键词： Tensile strength

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