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Atomically Dispersed Manganese Lewis Acid Sites Catalyze Electrohydrogenation of Nitrogen to Ammonia

CCS Chemistry 2022年第6期4卷 2115-2126页

作者： Zhoutai Shang Bin Song Hongbao Li Hong Zhang Fan Feng Jacob Kaelin Wenli Zhang Beibei Xie Yingwen Cheng Ke Lu Qianwang Chen Institutes of Physical Science and Information Technology Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationAnhui Graphene Engineering LaboratoryAnhui UniversityHefeiAnhui 230601 Hefei National Laboratory for Physical Sciences at the Microscale HefeiAnhui 230026 Laboratory of Nanoscale Biochemical Analysis Institute of Functional Nano and Soft Materials(FUNSOM)Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochowUniversitySuzhouJiangsu 215123 School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240 Department of Chemistry and Biochemistry Northern Illinois UniversityDeKalbIL 60115 School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006 State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoTaipaMacao 999078 Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026

Ambient electrochemical nitrogen fixation is a promising and environmentally benign route for producing sustainable ammonia,but has been limited by the poor performance of existing catalysts that promote the balanced chemisorption of N2 and subsequent electrochemical activation and ***,we describe the highly selective and efficient electrohydrogenation of nitrogen to ammonia using a hollow nanorod-based hierarchically graphitic carbon electrocatalyst with abundant atomically dispersed Mn *** discovered that the electron interactions strengthen the interfacial binding between nitrogen and active Mn Lewis acidic *** Lewis acid-base interactions promote the chemisorption and lock up nitrogen on the active sites and suppress proton *** proton-coupled electron transfer cleavage of the nitrogen triple bond through an associative mechanism was confirmed under lower overpotential,which delivered high ammonia yield of 67.5μg h−1 mgcat.−1 and Faradaic efficiency of 13.7% at−0.25 V versus the reversible hydrogen electrode,along with∼100% selectivity and significantly enhanced electrochemical stability(about 88.8% current retention over 50 h potentiostatic test)under mild *** strategy is versatile to tailor the nitrogen fixation performance of single-atom catalysts with atomic accuracy.

关键词： single atom catalyst nitrogen fixation Lewis acid-base interaction chemisorption hollow nanorod

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Biomedical data and AI

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Science China Life Sciences 2025年第5期68卷 1536-1540页

作者： Hao Xu Shibo Zhou Zefeng Zhu Vincenzo Vitelli Liangyi Chen Ziwei Dai Ning Yang Luhua Lai Shengyong Yang Sergey Ovchinnikov Zhuoran Qiao Sirui Liu Chen Song Jianfeng Pei Han Wen Jianfeng Feng Yaoyao Zhang Zhengwei Xie Yang-Yu Liu Zhiyuan Li Fulai Jin Hao Li Mohammad Lotfollahi Xuegong Zhang Ge Yang Shihua Zhang Ge Gao Pulin Li Qi Liu Jing-Dong Jackie Han Peking-Tsinghua Center for Life Sciences (CLS) Academy for Advanced Interdisciplinary StudiesPeking University Center for Quantitative Biology (CQB) Academy for Advanced Interdisciplinary StudiesPeking University Peking University-Tsinghua University-National Institute of Biological Sciences Joint Graduate Program Academy for Advanced Interdisciplinary StudiesPeking University Department of Physics University of Chicago School of Life Sciences Southern University of Science and Technology Peking University Chengdu Academy for Advanced Interdisciplinary Biotechnologies College of Chemistry and Molecular Engineering Peking University Department of Biotherapy Cancer Center and State Key Laboratory of BiotherapyWest China HospitalSichuan University Department of Biology Massachusetts Institute of Technology Lambic Therapeutics Inc. Changping Laboratory Al for Science Institute Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence Fudan University Department of Obstetrics and Gynecology West China Second University HospitalSichuan University Peking University International Cancer Institute and Peking University-Yunnan Baiyao International Medical Institute and State Key Laboratory of Natural and Biomimetic Drugs Department of Molecular and Cellular PharmacologySchool of Pharmaceutical SciencesPeking University Health Science CenterPeking University Channing Division of Network Medicine Department of MedicineBrigham and Women's Hospital and Harvard Medical School Center for Artificial Intelligence and Modeling the Carl R.Woese Institute for Genomic BiologyUniversity of Illinois Urbana-Champaign Department of Genetics and Genome Sciences School of Medicine and Department of Computer and Data Sciences and Department of Population and Quantitative Health SciencesCase Western Reserve University Department of Biochemistry and Biophysics University of California Sanger Institute Department of Automation Tsinghua University State Key Laboratory of Multimodal Artificial Intelligence Systems I

The development of artificial intelligence(AI) and the mining of biomedical data complement each other. From the direct use of computer vision results to analyze medical images for disease screening, to now integrating biological knowledge into models and even accelerating the development of new AI based on biological discoveries, the boundaries of both are constantly expanding, and their connections are becoming closer.

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Inspection trolley based on the distance detection obstacle

Inspection trolley based on the distance detection obstacle

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Chinese Control and Decision Conference, CCDC

作者： Guicheng Wang Ao Sheng Xiaobin Li Min Zhang Changliang Guan Fengfeng Yin School of Electrical and Electronics Engineering Shanghai Institute of Technology Shanghai China Library Shanghai Institute of Technology Shanghai China Zijin Intelligent Control (Xiamen) Technology Co. Ltd. Xiamen China State Key Laboratory of Process Automation in Mining & Metallurgy and Beijing Key Laboratory of Process Automation in Mining & Metallurgy Beijing China

In Industry 4.0 background, unmanned full-process automated production has gradually become a hot topic, and the realization of intelligent and information factory requires the joint cooperation of multiple industries, in which the inspection device that replaces traditional manual work is an inescapable topic. At present, domestic and foreign research on intelligent inspection trolley is focused on obstacle avoidance function based on various sensors. In this context, it is introduced an algorithm based on monocular camera as a sensor, using Python language to access OpenCV library, and utilizing Gaussian filter function and Canny operator-based image contour extraction to complete the distance measurement. The algorithm can achieve the distance measurement and obstacle avoidance function at a lower cost. The test results show that the system can automatically identify the distance of obstacles in the inspection process, and according to the visual information captured by the camera in real time, it can independently generate steering action and collision reminder, and can complete the preliminary requirement of intelligent inspection.

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Emission Reduction of Pcdd/Fs by Flue Gas Recirculation and Activated Carbon in the Iron Ore Sintering

SSRN

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SSRN 2023年

作者： Li, Chaoqun Liu, Guorui Qin, Shuai Zhu, Tingyu Song, Jianfei Xu, Wenqing CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Innovation Academy for Green Manufacture Chinese Academy of Sciences Beijing100190 China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences P.O.Box 2871 Beijing100085 China China University of Petroleum Beijing102249 China

Iron ore sintering is one of the major sources of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in the environment. Flue gas recirculation (FGR) and activated carbon (AC) are important technologies for the abatement of PCDD/Fs from sintered flue gas, and they have the effect of reducing both traditional pollutants (NOx, SO2, etc.) and PCDD/Fs. In this study, PCDD/Fs emissions during FGR were measured for the first time, and the effect of PCDD/Fs reduction after coupling FGR and AC technologies was analyzed in depth. The measured results showed that the ratio of PCDFs to PCDDs in the sintered flue gas was 6.8, indicating that the PCDD/Fs were mainly generated by de novo synthesis during the sintering process. Further analysis showed that FGR achieved 60.7% initial removal by circulating PCDD/Fs back to the high temperature bed, and AC further achieved 95.2% PCDD/Fs removal by physical adsorption. Among them, FGR is more effective in the removal of PCDDs and has higher removal efficiency for perchlorinated PCDD/Fs, while AC is better at the removal of PCDFs and can achieve efficient removal of all homologous PCDD/Fs, and they complement each other with a removal efficiency of 98.1%. The results of the study are instructive for the process design of coupling FGR and AC technologies to reduce PCDD/Fs in the sintered flue gas. © 2023, The Authors. All rights reserved.

关键词： Flue gases

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Dynamic Stability Analysis of Renewable Power Systems Considering Cluster Effect of Multiple Photovoltaic Generators with Same Dynamics

Dynamic Stability Analysis of Renewable Power Systems Consid...

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Frontiers of Power and Energy (ACFPE), Asian Conference on

作者： Zimin Zhu Xiaofang Wu Yu Duan Zhen Liu Dongliang Nan Peili Liu Electric Power Research Institute State Grid Xinjiang Electric Power Co. Ltd. Xinjiang Key Laboratory of Whole Process Simulation for Power System Urumqi China College of Electrical Engineering Sichuan University Chengdu China

ISBN: (数字)9798350367676

ISBN: (纸本)9798350378467

Dynamic stability issues posed by large-scale photovoltaic (PV) generation can jeopardize the secure operation of renewable power systems. This paper establishes a PV solar farm equivalent model that considers the cluster effect of multiple PV generators with same dynamics. Mathematical analysis indicates that the dynamic characteristics of PV generators are central to the dynamic instability of large-scale grid-connected PV solar farms. While increasing the scale of PV generators and weakening the AC transmission line connections exacerbate dynamic instability, these factors amplify the effect but are not the root cause. A case study conducted in an actual power system with high PV generation penetration highlights that the phase-locked loop parameters of PV inverters are crucial for triggering oscillations caused by the cluster effect of multiple PV generators with same dynamics. As the number of PV generators increases and the AC transmission line connections weaken, the system’s dynamic stability deteriorates in the specific power system.

关键词： Damping Renewable energy sources Power transmission lines Power system dynamics Solar farms Power system stability Dynamic scheduling Generators Stability analysis Oscillators

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Thermostable α-Diimine Nickel Complexes with Substituents on Acenaphthequinone-backbone for Ethylene Polymerization

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Chinese Journal of Polymer Science 2020年第11期38卷 1214-1220,I0007页

作者： Rui-Fang Zhang Yan-Hui Hou Xu-Ling Wei Ding-Ding Zhao Mi-Mi Cui Fei-Fan Zhai Xiang-Liu Li Bin-Yuan Liu Min Yang Hebei Key Laboratory of Functional Polymers Tianjin Key Laboratory of Chemical Process SafetyInstitute of Polymer Science and EngineeringHebei University of TechnologyTianjin 300130China State Key Laboratory of Separation Membranes and Membrane Processes School of Material Science and EngineeringTiangong UniversityTianjin 300160China Lanzhou Petrochemical Research Center Petrochemical Research Institute of CNPCLanzhou 730060China

In order to promote the thermostability of a-diimine nickel complex by ligand backbone structure,a series of α-diimine nickel complexes with substituents on acenaphthequinone backbone were synthesized and used as catalysts for ethylene *** the hydroxyethyl phenoxyl group was introduced to the acenaphthequinone-backbone,the thermal stability and activity of the catalyst could be significantly *** catalytic activity of complex C2[5-(4-(2-hydroxyethyl)phenoxyl)-N,N-bis(2,6-diisopropyl)acenaphthylene-1,2-diimine]nickel(Ⅱ)dibromide with isopropyl substituents on N-aryl reached 8.2×10^6g/(molNi·h)at 70℃and 2 *** activity of[5-(4-(2-hydroxyethyl)phenoxyl)-N,N-bis(2,6-dibenzhydryl-4-menthylphenyl)acenaphthylene-1,2-diimine]nickel(Ⅱ)dibromide(C3)still maintained at 6.7×10^5 g/(molNi·h)at 120℃.Compared with C3 containing bulky dibenzhydryl substituents,the activity of C2 was sensitive to the change of the polymerization ***,the polyethylenes obtained from complex C3 had lower branching ***,the molecular weight could reach 971 kg/mol,which is almost 5 times as much as that of the polyethylene obtained from complex C2.

关键词： α-Diimine nickel Ethylene polymerization Thermostability Ligand backbone structure

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Hollow Micro-/Nanostructure Reviving Lithium-sulfur Batteries

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Chemical Research in Chinese Universities 2020年第3期36卷 313-319页

作者： ZHAO Jilu YANG Mei Yang Nailiang WANG Jiangyan WANG Dan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

Higb-energy-density lhiumslu(Li-S)bttries are drawing dramatic research interests to fulill the ever-increasing demands of etrical ***,chllenges with the insulating poperty of sulfur and its lihistion products aund its large volume expansion,aund the sutle eflet of lthiumn polysulides,hinder the commer-cial application of Li-S *** of material design concepts have bocn developed to address the failure *** them,bollw micro-/anostructures with abundant compositional und geometrical feasibility have been prored fuitful in adresing the cureut obstacles of LiS bttries Here,lypical examples of designing hollw mi-co-/anostructures to address the problemns of Li-S bttries and sinultuneously improve the practical capacity and lifespan are *** purticular,the great efeet of structural engineering on minimizing volume change,inhi-biting the shutle efiet and catalyzing plysulide conversion are disussed systeatically. Fially fuure dreetions of hollow nanostrucure design to enhance the progress of Li-S butteries are also provided.

关键词： Hollow Mico-/nanostructure Lithium-ulfur buttary

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Dietary butyrate,lauric acid and stearic acid improve gut morphology and epithelial cell turnover in weaned piglets

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Animal Nutrition 2022年第4期11卷 276-282页

作者： Xianglin Zeng Yuan Yang Junmin Wang Zhaobin Wang Jun Li Yulong Yin Huansheng Yang Hunan International Joint Laboratory of Animal Intestinal Ecology and Health Animal Nutrition and Human Health LaboratorySchool of Life SciencesHunan Normal UniversityChangshaHunan 410081China Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process Key Laboratory of Agro-ecological Processes in Subtropical RegionHunan Provincial Engineering Research Center of Healthy LivestockScientific Observing and Experimental Station of Animal Nutrition and Feed Science in South-CentralMinistry of AgricultureInstitute of Subtropical AgricultureChinese Academy of SciencesChangshaHunan 410125China State Key Laboratory of Food Safety Technology for Meat Products Yinxiang GroupFujian Aonong Biological Science and Technology Group Co.Ltd.Key Laboratory of Swine Nutrition and Feed Science of Fujian ProvinceAonong GroupZhangzhouFujian 363000China College of Pharmacy Changsha Medical UniversityChangshaHunan410219China

This study was to evaluate the effects of the supplementation of saturated fatty acids with different chain lengths on growth performance,intestinal morphology,epithelial cell proliferation,differentiation and apoptosis in weaned ***-two weaned piglets(Duroc×Landrace×Yorkshire,BW=7.81±0.26 kg)were weaned at 21 d and randomly assigned to 1 of 4 experimental treatments:(1)a basal diet(control);(2)control+0.3% butyrate(BT);(3)control+0.3%lauric acid(LA);(4)control+0.3% stearic acid(SA).All piglets were then slaughtered for tissue sampling after having been fed experimental diets for 28 d after *** of BT increased the gain-to-feed ratio(G:F)(P<0.05)compared to piglets fed the control diet from 14 to 28 *** addition,the villus height(VH)to crypt depth(CD)ratio(VH:CD ratio)of the ileum were higher in the BT and LA diets than that of the control diet(P<0.05).The SA-supplemented diet increased ileal VH(P<0.05),whereas the BT-supplemented diet increased jejunal CD(P<0.05).Compared to the control,diets supplemented with BT,LA,or SA all tended to increase jejunal proliferation(Ki67/crypt positive cells)(P=0.190);diets supplemented with BT or SA significantly increased the number of ki67-positive cells in the ileal crypt(P<0.05).Furthermore,in the jejunum,the protein expression of activated caspase 3 and villin were increased in piglets fed BT,LA,or SA diets compared to those on the control diet(P<0.05).In the ileum,compared with the control diet,the BT diet tended to increase the protein level of mammalian phosphorylation target of rapamycin(p-m TOR,P<0.10);LA or SA diets significantly increased p-m TOR protein expression(P<0.05).These results show that dietary supplementation of BT,LA,or SA promotes jejunal cell renewal in weaned *** the same time,increased proliferation of ileal crypt cells by promoting p-m TOR expression has beneficial effects on ileal morphology in weaned piglets.

关键词： Weaned piglet Saturated fatty acid Growth performance Intestinal morphology Proliferation

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Two-Dimensional Broad Learning System for Data Analytic

IEEE Transactions on Artificial Intelligence

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IEEE Transactions on Artificial Intelligence 2021年第6期2卷 594-607页

作者： Dai, Wei Zhang, Rui Wang, Qianjin Cheng, Yuhu Wang, Xuesong The Engineering Research Center of Intelligent Control for Underground Space Ministry of Education China University of Mining and Technology Xuzhou221116 China The School of Information and Control Engineering China University of Mining and Technology Xuzhou221116 China The State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang110819 China The School of Electrical Engineering Yancheng Institute of Technology Yancheng221051 China

Recently, a novel learning algorithm called the broad learning system (BLS) has been established by using the theory of pseudoinverse and compressed sensing technology. As an alternative to deep learning, BLS has gained extensive attention in data analytics. Unlike the existing deep structures based learning tools (such as deep neural networks), it is able to rapidly achieve incremental learning, and does not require tedious retraining to remodel the system. However, given image data modeling tasks, 1-D BLS requires a conventional vectorization operation, the dimension of input will be quite large for high resolution image. This operation may result in huge computational complexity, thereby increasing the time of model construction. To resolve this issue, a 2-D version of BLS, namely 2-D-BLS, is first proposed to fast construct randomized learner models by using matrix inputs. Specifically, the proposed method employs left and right projecting vectors to replace the usual high dimensional input weight. Moreover, the theoretical analyses on the superiority of 2-D-BLS against BLS are presented in terms of the algorithm complexity and the difference of random parameter space. Empirical results on MNIST dataset, NORB 3-D object image recognition dataset, ORL dataset, YaleB dataset, and handwritten digit dataset demonstrate that the proposed 2-D-BLS outperforms the existing extensions of BLS and state-of-the-art 2-D machine learning methods in terms of the learning efficiency, showing good potential of 2-D-BLS for image data analytics. Impact statement-as a novel learning tool, BLS has achieved great success in many fields. Image recognition is one of the most widely used fields of artificial intelligence. But, BLS is a 1-D model, the vectorization operation is necessary to convert matrix input data into a row or a column vector. This operation will lead to "explosion of dimensionality" and increase the time of model construction when it is coming to image data analytic

关键词： Learning systems

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Phase Transfer-Assisted Synthesis of Indium-Based Nanomaterials from Spent Liquid Crystal Display Panels for High-Efficiency Co2 Electrochemical Reduction

SSRN

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SSRN 2024年

作者： Wu, Yufeng Ren, Zhiyuan Liu, Hui Guo, Feng Tian, Shaonan Yang, Jun Institute of Circular Economy Beijing University of Technology Beijing100124 China Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

Transforming discarded electronic devices into low-cost and high-efficiency catalysts presents a win-win approach to address the scarcity of rare resources and sustainable energy challenges. Herein, we report an effective strategy that combines an ethanol-mediated dodecylamine (DDA) phase transfer with hydrothermal methods for facilitating the facile synthesis of indium (In)-based nanomaterials from the leachates of liquid crystal display panels (LCDPs) toward high-efficiency electrochemical CO2 reduction reaction (eCO2RR). In this strategy, the rapid formation of coordinating compounds between the -NH2 group of DDA and metal ions facilitates the separation of In3+ cations from the acidic LCDP leach solution by transferring them into an organic phase, which are then converted into InOOH nanoparticles with abundant oxygen vacancies (denoted as In-LCDPs and hereafter) through a low-temperature hydrothermal process. The eCO2RR evaluations confirm the superior electrocatalytic performance of the In-based nanoparticles produced from the LCDPs. In specific, within a broad potential range (-0.77 to -1.17 V vs. RHE), the In-LCDPs show a Faradaic efficiency for formate (FEformate) of 85%, with the highest FEformate of 90.23% at -0.97 V vs. RHE, which is comparable to the FEformate (93.8% at -0.97 V vs. RHE) of In-based catalyst prepared from pure In precursors using the same method. Further investigations reveal that the Sn and Al impurities have minimal impact on the catalytic performance of In-LCDPs, while the presence of Fe3+ impurities significantly enhances the production of hydrogen during the eCO2RR. This work might have provided a scalable pathway to transform LCDPs into value-added electrocatalysts for eCO2RR. © 2024, The Authors. All rights reserved.

关键词： Metal ions

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