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Identifying the dynamic behaviors in complete reconstruction of Co-based complex precatalysts during electrocatalytic oxygen evolution

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Journal of Energy Chemistry 2025年第1期100卷 226-233页

作者： Jingfang Zhang Danyang Wu Linke Cai Youluan Lu Fanpeng Cheng Lijuan Shi Qun Yi Yao Liu Yi Huang Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationHubei Key Laboratory of Novel Reactor and Green Chemical TechnologySchool of Chemical Engineering&PharmacyWuhan Institute of TechnologyWuhan 430205HubeiChina Key Laboratory of Pesticide&Chemical Biology of Ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of EducationCollege of ChemistryCentral China Normal UniversityWuhan 430079HubeiChina College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108FujianChina

Transition metal-based nanomaterials have emerged as promising electrocatalysts for oxygen evolution reaction(OER).Considerable research efforts have shown that self-reconstruction occurs on these nanomaterials under operating conditions of OER ***,most of them undergo incomplete reconstruction with limited thickness of reconstruction layer,leading to low component utilization and arduous exploration of real catalytic ***,we identify the dynamic behaviors in complete reconstruction of Co-based complexes during *** hollow phytic acid(PA)cross-linked CoFe-based complex nanoboxes with porous nanowalls are designed because of their good electrolyte penetration and mass transport ability,in favor of the fast and complete reconstruction.A series of experiment characterizations demonstrate that the reconstruction process includes the fast substitution of PA by OH-to form Co(Fe)(OH)xand subsequent potential-driven oxidation to Co(Fe)*** obtained CoFeOOH delivers a low overpotential of 290 mV at a current density of 10 mA cm^(-2)and a long-term *** experiment results together with theory calculations reveal that the Fe incorporation can result in the electron rearrangement of reconstructed CoFeOOH and optimization of their electronic structure,accounting for the enhanced OER *** work provides new insights into complete reconstruction of metal-based complexes during OER and offers guidelines for rational design of high-performance electrocatalysts.

关键词： Complete reconstruction Co-based complex Precatalysts Oxygen evolution reaction

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Green innovation unleashed:Harnessing tungsten-based nanomaterials for catalyzing solar-driven carbon dioxide conversion

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Chinese chemical Letters 2025年第2期36卷 108-117页

作者： Weidan Meng Yanbo Zhou Yi Zhou State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and TechnologyShanghai 200237China National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery East China University of Science and TechnologyShanghai 200237China Shanghai Engineering Research Center for Multi-media Environmental Catalysis and Resource Utilization East China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Carbon dioxide photocatalytic reduction (CO_(2)-PR) is an efficient method for controlling CO_(2)emissions and generating cleaner energy while mitigating global *** oxides (WxOy) have attracted considerable attention for CO_(2)-PR due to their excellent spectral ***,comprehensive reviews are lacking on the use of WxOyfor CO_(2)-***,this review provides a detailed summary of t research progress made with WxOy-based catalysts in CO_(2)-*** also explains the fundamental principles of CO_(2)-PR and evaluates key performance indicators that affect the activity of WxOy-based photocatalysts,including yield,selectivity,stability,and apparent quantum ***,this review explores opportunities for synthesizing high-performance WxOy-based photocatalysts and highlights their potential for the green preparation of C1/C2 products through CO_(2)-*** innovative strategies aim to address the challenges and pressures associated with energy and environmental issues,particularly by enhancing artificial photosynthesis efficiency.

关键词： Carbon dioxide photoreduction Tungsten-based nanocatalyst Mechanism Performance evaluation Selectivity

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High concentration of Ti^(3+)in C-TiO_(x)nanosheets boosting efficient photodegradation

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Science China(Technological Sciences) 2025年第3期68卷 156-166页

作者： Chongbei WU Xuan LI Haibin WANG Jiaxin TANG Shuai WEI Yuanyuan WU Aobing WANG Jizhou JIANG Hebei Key Laboratory of Man-machine Environmental Thermal Control Technology and Equipment Hebei Vocational University of Technology and EngineeringXingtai054000China School of Materials Science and Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationWuhan Institute of TechnologyWuhan430205China

Semiconductor photocatalysis holds significant promise for addressing dye-pollution in ***,the efficiency of photocatalytic water purification is constrained by the weak light absorption capacity and low active site distribution of *** a bottom-up approach,carbon-doped TiO_(x)(C-TiO_(x))nanosheets with high concentrations of Ti^(3+)active sites were fabricated by etching the Al element in Ti_(3)Ai C_(2)with H_(2)O_(2).Experimental evidence demonstrates that the optimal C-TiO_(x)nanosheets exhibit high activity for the photocatalytic degradation of methylene blue,achieving a degradation rate of 100%within 50 *** introduction of carbon into the C-TiO_(x)nanosheets induces a red shift in the absorption edge,boosting the migration of photo-generated charge ***,there is a significant correlation between the concentration of Ti^(3+)active sites and the density of oxygen vacancies in the C-TiO_(x)nanosheets,which synergistically influence the photocatalytic degradation performance of MB dye wastewater.

关键词： bottom-up strategies C-TiO_(x)nanosheets high-concentrations Ti^(3+) photocatalytic degradation

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Multi-scale feature fused stacked autoencoder and its application for soft sensor modeling

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Chinese Journal of chemical Engineering 2025年 81卷 241-254页

作者： Li, Zhi Xia, Yuchong Long, Jian Liu, Chensheng Zhang, Longfei State Key Laboratory of Industrial Control Technology East China University of Science and Technology Shanghai 200237 China Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of Education East China University of Science and Technology Shanghai200237 China Huzhou Institute of Industrial Control Technology Huzhou313099 China Engineering Research Center of Process System Engineering Ministry of Education East China University of Science and Technology Shanghai200237 China

Deep Learning has been widely used to model soft sensors in modern industrial processes with nonlinear variables and uncertainty. Due to the outstanding ability for high-level feature extraction, stacked autoencoder (SAE) has been widely used to improve the model accuracy of soft sensors. However, with the increase of network layers, SAE may encounter serious information loss issues, which affect the modeling performance of soft sensors. Besides, there are typically very few labeled samples in the data set, which brings challenges to traditional neural networks to solve. In this paper, a multi-scale feature fused stacked autoencoder (MFF-SAE) is suggested for feature representation related to hierarchical output, where stacked autoencoder, mutual information (MI) and multi-scale feature fusion (MFF) strategies are integrated. Based on correlation analysis between output and input variables, critical hidden variables are extracted from the original variables in each autoencoder's input layer, which are correspondingly given varying weights. Besides, an integration strategy based on multi-scale feature fusion is adopted to mitigate the impact of information loss with the deepening of the network layers. Then, the MFF-SAE method is designed and stacked to form deep networks. Two practical industrial processes are utilized to evaluate the performance of MFF-SAE. Results from simulations indicate that in comparison to other cutting-edge techniques, the proposed method may considerably enhance the accuracy of soft sensor modeling, where the suggested method reduces the root mean square error (RMSE) by 71.8%, 17.1% and 64.7%, 15.1%, respectively. © 2025 chemical Industry and Engineering Society of China, and chemical Industry Press Co., Ltd.

关键词： Frequency estimation

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DERIVATION OF TRANSFER-FUNCTIONS FOR HIGHLY NONLINEAR DISTILLATION-COLUMNS

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INDUSTRIAL & ENGINEERING CHEMISTRY research 1987年第12期26卷 2490-2495页

作者： LUYBEN, WL Process Modeling and Control Center Department of Chemical Engineering Lehigh University Bethlehem Pennsylvania 18015 United States

One of the major problems in distillation column control is obtaining a suitable linear transfer function model for columns that are highly nonlinear and complex. Neither analytical nor numerical linearization methods work well for realistically complex distillation systems. Identification techniques, such as pulse testing, also become ineffective when the columns are highly nonlinear or have large time constants. A simple, easy-to-use design procedure is presented that appears to work quite well on these systems. The method uses Astrom's “autotune” method (relay feedback) to get critical gains and frequencies for each diagonal element of the plant transfer function matrix. Only N tests are required for an N x N multivariable process. Steady-state gains are obtained in the normal way, using a steady-state “rating” program. Then all N X N transfer functions are obtained by fitting the zero frequency and ultimate frequency data. The effectiveness of the method is illustrated on a highly nonlinear distillation column that features product purities of 10 ppm. © 1987, American chemical Society. All rights reserved.

关键词： DISTILLATION EQUIPMENT

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A RATIONAL APPROACH TO control VALVE SIZING

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INDUSTRIAL & ENGINEERING CHEMISTRY research 1990年第4期29卷 700-703页

作者： LUYBEN, WL Process Modeling and Control Center Department of Chemical Engineering Lehigh University Pennsylvania 18015 111 Research Drive Bethlehem United States

The sizing of control valves usually involves a trade-off between pump head and control valve size: the bigger the valve, the smaller the pressure drop across the valve and the lower the pump head. Thus, large valves are desirable from a steady-state energy-consumption viewpoint. However, dynamic rangeability is improved by designing the system for small, high pressure drop control valves. control valves are often sized on the basis of heuristics, the most common one being to make the pressure drop over the control valve at design conditions one-third of the total system pressure drop. In some applications, this rule-of-thumb works well, but in others it is totally inadequate. A more rational procedure is presented in this paper. The idea is to specify the maximum and minimum flow rates required. Then the sizes of both the pump and the control valve can be directly calculated. © 1990, American chemical Society. All rights reserved.

关键词： Flow of Fluids

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MULTICOMPONENT BATCH DISTILLATION .1. TERNARY-SYSTEMS WITH SLOP RECYCLE

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INDUSTRIAL & ENGINEERING CHEMISTRY research 1988年第4期27卷 642-647页

作者： LUYBEN, WL Process Modeling and Control Center Department of Chemical Engineering Mountaintop Campus Lehigh University Bethlehem Pennsylvania 18015 111 Research Drive United States

The capacity factor methodology developed by Luyben for binary batch distillation is extended to the separation of ternary mixtures. The processing strategy of recycling the two slop cuts back into the next batch is used. The effects of both design and operating parameters are explored by using digital simulation: number of trays, reflux ratio (both fixed and variable), initial still charge, relative volatility, and product purity. The capacity factor can be used to determine the optimum number of stages and the optimum reflux ratio. Results show little difference in capacity between an optimum fixed reflux policy and a variable reflux policy. Capacity increases with increasing number of trays and increasing relative volatility. © 1988, American chemical Society. All rights reserved.

关键词： DISTILLATION

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THE CONCEPT OF EIGENSTRUCTURE IN process-control

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INDUSTRIAL & ENGINEERING CHEMISTRY research 1988年第1期27卷 206-208页

作者： LUYBEN, WL Process Modeling and Control Center Department of Chemical Engineering Lehigh University Bethlehem Pennsylvania 18015 United States

Much of the work in multivariable process control has been directed at finding control structures that minimize interaction among loops and decouple the system. This paper claims that this approach is flawed. What is really important in the vast majority of chemical and petroleum processes is a structure that does the best job in rejecting load disturbances. This inherent or intrinsic“eigenstructure” (choice of controlled and manipulated variables and their pairing) is that configuration which yields a system that is naturally self-regulating for load disturbancesand self-optimizing. Eigenstructure is a unifying concept that links several previously published approaches to the process control problem. © 1988, American chemical Society. All rights reserved.

关键词： process control

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SENSITIVITY OF DISTILLATION RELATIVE GAIN ARRAYS TO STEADY-STATE GAINS

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INDUSTRIAL & ENGINEERING CHEMISTRY research 1987年第10期26卷 2076-2078页

作者： LUYBEN, WL Process Modeling and Control Center Department of Chemical Engineering Lehigh University Bethlehem Pennsylvania 18015 United States

The values of the Relative Gain Array (RGA) for a 2 x 2 binary distillation column system are shown to be extremely sensitive to the size of the manipulated variable increment that is used to calculate the steady-state gain. RGA's can vary from plus infinity to minus infinity. Extremely small increments must be used, even in moderate purity columns, in order to get accurate RGA's. © 1987, American chemical Society. All rights reserved.

关键词： DISTILLATION EQUIPMENT

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ROBUSTNESS WITH RESPECT TO INTEGRAL controlLABILITY

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INDUSTRIAL & ENGINEERING CHEMISTRY research 1987年第5期26卷 1043-1045页

作者： YU, CC LUYBEN, WL Process Modeling and Control Center Department of Chemical Engineering Lehigh University Bethlehem Pennsylvania 18015 United States

A multivariable closed-loop process may become unstable for small changes in steady-state gains if integral action is used. The results of this work show that the Relative Gain Array (RGA) is related quantitatively to the amount of change (or error) allowed in each individual steady-state gain before the system becomes unstable. The derived criterion is applicable for any type of feedback control system as long as integral action is used. © 1987, American chemical Society. All rights reserved.

关键词： process control

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