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Revisited electrochemical gas evolution reactions from the perspective of gas bubbles

Nano Research 2023年第4期16卷 4381-4398页

作者： Weinan Yin Yuntao Cai Lingbin Xie Hao Huang Enchi Zhu Junan Pan Jiaqi Bu Hao Chen Ye Yuan Zechao Zhuang Longlu Wang College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts&Telecommunications(NJUPT)Nanjing 210023China Department of Chemistry Tsinghua UniversityBeijing 100084China State Key Laboratory of Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Nanjing University of Posts&TelecommunicationsNanjing 210023China

Electrochemical gas evolution reactions are common but essential in many electrochemical processes including water *** these processes,gas bubbles are constantly nucleating on reaction interfaces in electrolyte and consequently exert an impact on catalysts and the *** the past few decades,extensive studies have been conducted to characterize bubbles with emerging advanced technologies,manage behaviors of bubbles,and apply bubbles to various *** this review,we summarize representative discoveries as well as recent advancements in electrochemical gas evolution reactions from the perspective of gas ***,we end up this review with a profound outlook on future research topics from the combination of experiments and theoretical techniques,non-negligible bubble effects,gravity-free situation,and reactions under practical industrial conditions.

关键词： gas bubbles bubble characterization bubble management bubble applications

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ScY@C_(3v)(8)-C_(82):Metal-Metalσ^(2)Bond in Mixed Rare-Earth Di-metallofullerenes

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Chinese Journal of Chemistry 2023年第15期41卷 1809-1814页

作者： Lihao Zheng Yannick Roselló Yingjing Yan Yang-Rong Yao Xiaolin Fan Josep M.Poblet Antonio Rodríguez-Fortea Ning Chen College of Chemistry Chemical Engineering and Materials Scienceand State Key Laboratory of Radiation Medicine and ProtectionSoochow UniversitySuzhouJiangsu 215123China Departament de Quimica Fisica i Inorganica Universitat Rovira i VirgiliMarcelli Domingo 143007 TarragonaSpain Department of Materials Science and Engineering CAS Key Laboratory of Materials for Energy ConversionAnhui Laboratory of Advanced Photon Science and TechnologyUniversity of Science and Technology of ChinaHefeiAnhui 230026China

Comprehensive Summary The experimental investigation of rare-earth metal-metal bonds remains a challenge in the study of chemical ***,we report the synthesis and characterization of a novel heteronuclear di-metallofullerene,ScY@C_(3v)(8)-C_(82),which contains a mixed rare-earth metal-metal ***@C_(3v)(8)-C_(82)was successfully synthesized by arc-discharging method and characterized by mass spectrometry,UV-vis-NIR spectroscopy and single-crystal X-ray diffraction crystallography,which unambiguously determined its molecular *** calculations were also performed to study the optimized positions of Sc-Y metallic dimer and the electronic *** combined experimental and theoretical results confirmed that both Sc and Y atoms transfer two electrons to the C_(3v)(8)-C_(82)cage,i.e.,(ScY)4+@(C_(3v)(8)-C_(82))4-.In particular,a covalent Sc-Yσ2 bond,which has never been reported before,is proven to be formed inside C_(3v)(8)-C_(82)fullerene *** work presents a novel di-metallofullerene containing mixed rare-earth metal-metal bond and expands the understanding of metal-metal bonding of rare earth elements.

关键词： Fullerenes Endohedral fullerenes Rare earths Densityfunctional calculations Metal-metal bond

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MOF-derived Cu embedded into N-doped mesoporous carbon as a robust support of PdAu nanocatalysts for ethanol electrooxidation

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Rare Metals 2024年第3期43卷 1083-1094页

作者： Yu-Fu Huang Peng Wu Jun-Ping Tang Jian Yang Jing Li Shuai Chen Xue-Ling Zhao ChengChen Bin-Wei Zhang Yan-Yun Ma Wei-Heng Shi Dong-Hai Lin Shi-Gang Sun School of Energy and Materials Shanghai Engineering Research Center of Advanced Thermal Functional MaterialsShanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai201209China State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing401331China Center of Advanced Energy Technology and Electrochemistry Institute of Advanced Interdisciplinary StudiesChongqing UniversityChongqing400044China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China Department of Materials Science and Engineering Drexel UniversityPhiladelphiaPA19104USA

Metal-organic frameworks(MOFs)h ave attracted widespread attention due to their large surface area and porous *** designing the nanostructures of MOFs to promote their application in ethanol electrooxidation is still a ***,a novel Cu-NCNs(Cu-nitrogen-doped carbon nanotubes)support was synthesized by pyrolysis of melamine(MEL)and Cu-ZIF-8 together,and then,Pd-Au nanoalloys were loaded by sodium borohydride reduction method to prepare PdAu@Cu-NCNs *** generating mesoporous carbon with high specific surface area and favorable electron and mass transport can be used as a potential excellent carrier for PdAu *** addition,the balance of catalyst composition and surface structure was tuned by controlling the content of Pd and ***,the best-performed Pd_(2)Au_(2)@Cu-NCN-1000-2(where 1000 means the carrier calcination temperature,and 2 means the calcination constant temperature time)catalyst exhibits better long-term stability and electrochemical activity for ethanol oxidation in alkaline media(4.80 A·mg^(-1)),which is 5.05 times higher than that of commercial Pd/C(0.95 A·mg^(-1)).Therefore,this work is beneficial to further promoting the application of MOFs in direct ethanol fuel cells(DEFCs)and can be used as inspiration for the design of more efficient catalyst support structures.

关键词： Metal-organic frameworks(MOFs) N-doped Mesoporous carbon PdAu Ethanol electrooxidation

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Data-driven approach to predict the fatigue properties of ferrous metal materials using the cGAN and machine-learning algorithms

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Advances in Manufacturing 2024年第3期12卷 447-464页

作者： Si-Geng Li Qiu-Ren Chen Li Huang Min Chen Chen-Di Wei Zhong-Jie Yue Ru-Xue Liu Chao Tong Qing Liu School of Advanced Technology Xi’an Jiaotong-Liverpool UniversitySuzhou215123JiangsuPeople’s Republic of China Key Laboratory for Light-weight Materials Nanjing Tech UniversityNanjing210009People’s Republic of China Materials Bigdata and Application Division Material Academy JitriSuzhou215131JiangsuPeople’s Republic of China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai200240People’s Republic of China

The stress-life curve(S–N)and low-cycle strain-life curve(E–N)are the two primary representations used to characterize the fatigue behavior of a *** material fatigue curves are essential for structural fatigue ***,conducting material fatigue tests is expensive and *** address the challenge of data limitations on ferrous metal materials,we propose a novel method that utilizes the Random Forest Algorithm and transfer learning to predict the S–N and E–N curves of ferrous *** addition,a data-augmentation framework is introduced using a conditional generative adversarial network(cGAN)to overcome data *** incorporating the cGAN-generated data,the accuracy(R2)of the Random Forest Algorithm-trained model is improved by 0.3–*** is proven that the cGAN can significantly enhance the prediction accuracy of the machine-learning model and balance the cost of obtaining fatigue data from the experiment.

关键词： Fatigue life curve Machine learning Transfer learning Conditional generative adversarial network(cGAN)

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Ground-state chiral excitation via periodic modulation

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Physical Review A 2024年第1期110卷 012432-012432页

作者： Shuyue Wang Wuji Zhang Chunfang Sun Chunfeng Wu Gangcheng Wang Center for Quantum Sciences and School of Physics Science Mathematics and Technology Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province

In this study we engineer the z component of the Dzyaloshinskii-Moriya interaction mediated by photons to emulate ground-state chiral excitation based on three-level atoms driven by quantum and classical fields. We employ adiabatic elimination techniques to derive an effective Dzyaloshinskii-Moriya interaction Hamiltonian of two-level systems in the ground-state manifold, which can ensure the desired dynamics is achieved through the implementation of periodic modulation. Meanwhile, three-state and multistate chiral excitation can be obtained by choosing appropriate driving frequencies and phases. The numerical simulation results clearly indicate that our proposal can generate the comparatively perfect three-state chiral excitation and relatively reliable multistate chiral excitation. Moreover, the influence of unfavorable factors on the chiral current is discussed in detail, and the potential experimental feasibility further shows that our results provide possibilities for quantum state transfer and future quantum networks.

关键词： Quantum control Quantum engineering Quantum state transfer

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Image Denoising of Fishing Nets Underwater with Range Selection Based on Convolutional Sparse Coding 4

Image Denoising of Fishing Nets Underwater with Range Select...

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4th International Symposium on Computer Engineering and Intelligent Communications, ISCEIC 2023

作者： Wu, Sheng Liu, Chao Zhang, Honglei Duan, Enyue Jiang, Nian Harbin Engineering University Yantai Research Institute China Jiangsu Ocean University Jiangsu Key Laboratory of Function Control Technology for Advanced Materials Jiangsu China Marine Photoelectric Imaging Project Team Shandong Aerospace Electronic Technology Institute Shandong China

ISBN: (纸本)9798350306323

The underwater detection imaging technology mainly includes sonar imaging and underwater optical imaging. In order to overcome the disadvantages of low resolution of sonar imaging and short detection range of traditional optical imaging, optical gating technology is applied to underwater fishing net detection. This technology has higher resolution compared to sonar imaging, and its detection range has also been shown to be three times larger than that of conventional optical imaging. However, underwater range gating imaging can suffer from large random noise and low signal-to-noise ratio. In order to solve this problem, this paper proposes a convolutional sparse coding denoising neural network based on deep learning to improve image quality. This network consists of a local residual channel and a global convolutional sparse coding channel. Compared with DnCNN, ECNDNet and other methods, the average Peak signal-to-noise ratio of the proposed method is improved by 1.572.11dB, which can effectively remove random noise and reconstruct clear underwater fishing net range-gated images. © 2023 IEEE.

关键词： Signal to noise ratio

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Site-Selective Polyolefin Hydrogenolysis on Atomic Ru for Methanation Suppression and Liquid Fuel Production

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Research 2023年第3期6卷 423-432页

作者： Mingyu Chu Xianpeng Wang Xuchun Wang Xiangxi Lou Congyang Zhang Muhan Cao Lu Wang Youyong Li Sibao Liu Tsun-Kong Sham Qiao Zhang Jinxing Chen Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory of Advanced Negative Carbon TechnologiesJoint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123P.R.China Department of Chemistry University of Western OntarioLondonOntario N6A 5B7Canada Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Material Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

Catalytic hydrogenolysis of end-of-life polyolefins can produce value-added liquid fuels and therefore holds great promises in plastic waste reuse and environmental *** major challenge limiting the recycling economic benefit is the severe methanation(usually>20%)induced by terminal C–C cleavage and fragmentation in polyolefin ***,we overcome this challenge by demonstrating that Ru single-atom catalyst can effectively suppress methanation by inhibiting terminal C–C cleavage and preventing chain fragmentation that typically occurs on multi-Ru *** Ru single-atom catalyst supported on CeO_(2)shows an ultralow CH_(4)yield of 2.2%and a liquid fuel yield of over 94.5%with a production rate of 314.93 gfuels gRu^(−1)h^(−1)at 250℃for 6 *** remarkable catalytic activity and selectivity of Ru single-atom catalyst in polyolefin hydrogenolysis offer immense opportunities for plastic upcycling.

关键词： catalyst olefin fragmentation

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Nitrogen-doped porous carbon nanofoams with enhanced electrochemical kinetics for superior sodium-ion capacitor

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Rare Metals 2022年第7期41卷 2481-2490页

作者： K.Ramachandran Gokila Subburam Xian-Hu Liu Ming-Gang Huang Chun Xu Dickon H.L.Ng Ying-Xue Cui Guo-Chun Li Jing-Xia Qiu Chuan Wang Jia-Biao Lian Institute for Energy Research Jiangsu UniversityZhenjiang 212013China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002China Key Laboratory of Fine Chemical Application Technology of Luzhou Luzhou 646099China Department of Physics The Chinese University of Hong KongHong Kong 999077China Jiangsu National Synergetic Innovation Center for Advanced Materials School of Chemistry and Molecular EngineeringInstitute of Advanced SynthesisNanjing Technology UniversityNanjing 211800China

Many electrochemical energy storage devices,such as batteries,supercapacitors,and metal ion capacitors,rely on effective and inexpensive electrode ***,we have developed highly active nitrogen-doped porous carbon nanofoams(NPCNs-600-N)for sodium-ion capacitors(SICs).NPCNs-600-N have a highly porous framework,extended interlayer spacing(0.41 nm),and lots of surface functional ***,NPCNs-600-N achieves a high reversible capacity(301 mAh·g^(-1)at 0.05 A·g^(-1)),superior rate capability(112 mAh·g^(-1)at 5.00 A·g^(-1)),and ultra-stable *** excellent rate and cycling performance originate from the abundant active sites and porous architecture of ***-more,SICs device is constructed by employing the NPCNs-600-N as the battery-like anode and commercial superconductive carbon black as the capacitive cathode,which delivers high energy/power densities of 92 Wh·kg^(-1)/15984 W·kg^(-1)with a remarkable cyclability(93%reten-tion over 5000 cycles at 1.00 A·g^(-1)).The methodology of the work enables the simultaneous tuning of the porous architectures and surface function groups of carbon for high-performance SICs.

关键词： Carbon nanofoams Nitrogen-doping Porous structure Kinetics analysis Sodium-ion capacitors

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Effect of CNT content on microstructure and tribological properties of CNTs/AlSi10Mg composites by LPBF

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China Foundry 2025年

作者： Li-yi Jiang Chao-yi Shen Ting-ting Liu Chang-dong Zhang Xiang Su Wei-wei Xu Bo-xiang Wang Zhi-xiang Qi Wen-he Liao School of Mechanical Engineering Nanjing Institute of Technology National Joint Engineering Research Center of NC Forming Technology and Equipment School of Mechanical Engineering Nanjing University of Science and Technology Jiangsu Belight Laboratory State Key Laboratory of Advanced Casting Technologies Nanjing University of Science and Technology School of Aviation and Mechanical Engineering Changzhou Institute of Technology

In this study, carbon nanotubes(CNTs)/AlSi10Mg composite parts with CNTs contents ranging from 0.0 to 2.0wt.% were successfully fabricated via laser powder bed fusion(LPBF) with laser scan speeds ranging from 900 to 1,900 mm·s-1. Uniform dispersion of CNTs in the powders can be achieved when their content is below 2.0wt.%. In the LPBF samples, the morphology of the CNTs is found to be directly related to their ***, the length of CNTs in samples prepared by LPBF increases as the CNT content increases. The length of CNTs is approximately 200-300 nm in the 1.0wt.% CNTs/AlSi10Mg composites and approximately 500-1,000 nm in the 2.0wt.% CNTs/AlSi10Mg composites. The hardness of the composites reaches its highest value of 143.3 HV when the CNTs content is 1.0wt.% and the laser scan speed is 1,300 mm·s-1. It is found that the self-lubricating properties of the CNTs improve the tribological properties of the composites. The coefficient of friction(CoF) and wear rate of the samples decrease with increasing CNT content. At a CNTs content of 2.0wt.%,the CoF and wear rate of the composite decrease by approximately 14% and 30%, respectively, compared to the unreinforced matrix. The presence of CNTs leads to a more complete and refined network microstructure within the samples. Both the CNTs and the aluminum carbide contribute to the Orowan mechanism and the Hall-Petch effect within the matrix.

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advanced Recursive Algorithm Based Electronic Polarization Tracking for PDM-DQPSK Differential Detection Optical Transmission Systems

Advanced Recursive Algorithm Based Electronic Polarization T...

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2023 Asia Communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Tian, Zhongxing Jiang, Chenxu Chai, Xudong Wang, Xiaozhou Huang, Huan Zhou, Jun Cai, Yi Jiangsu Hengxin Semitech Co. Ltd Suzhou China Soochow University Suzhou Key Laboratory of Advanced Optical Communication Network Technology Suzhou China

ISBN: (纸本)9798350312614

We propose a differential-detection receiver architecture and a novel recursive algorithm for electronic polarization tracking in polarization-division-multiplexed differential quadrature-phase-shift-keying (PDM-DQPSK) systems. Simulation results demonstrate that the proposed system approaches the performance of coherent-detection-based PDM-DQPSK systems. © 2023 IEEE.

关键词： differential quadrature-phase-shift-keying electronic polarization tracking optical fiber communication polarization-division-multiplexing

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