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Journal of Energy Chemistry 2025年第1期100卷 317-326页

作者： Binglu Deng Jie Shen Jinxing Lu Chuqiang Huang Zhuoyuan Chen Feng peng Yunpeng Liu School of Materials Science and Hydrogen Energy Foshan UniversityFoshan 528000GuangdongChina School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006GuangdongChina Guangdong key Laboratory for Hydrogen Energy Technologies Foshan 528000GuangdongChina

Seawater electrolysis is a promising approach for sustainable energy without relying on precious ***,the large-scale seawater electrolysis is hindered by low catalytic efficiency and severe anode corrosion caused by the harmful *** contrast to the oxygen evolution reaction (OER)and chlorin ion oxidation reaction (ClOR),glycerol oxidation reaction (GOR) is more thermodynamically and kinetically favorable ***,a Ru doping cobalt phosphide (Ru-CoP_(2)) is proposed as a robust bifunctional electrocatalyst for seawater electrolysis and GOR,for the concurrent productions of hydrogen and value-added *** in situ and ex situ characterization analyses demonstrated that Ru doping featured in the dynamic reconstruction process from Ru-CoP_(2)to Ru-CoOOH,accounting for the superior GOR *** coupling GOR with hydrogen evolution was realized by employing Ru-CoP_(2)as both anode and cathode,requiring only a low voltage of 1.43 V at 100 mA cm^(-2),which was 250 m V lower than that in alkaline *** work guides the design of bifunctional electrocatalysts for energy-efficient seawater electrolysis coupled with biomass resource upcycling.

关键词： Glycerol electrooxidation Hydrogen evolution Ru doping Cobalt phosphide Bifunctional electrocatalysts

Microstructure effect of mechanical and cracking behaviors on brittle rocks using image-based fast Fourier transform method

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Journal of Rock Mechanics and Geotechnical Engineering 2025年第1期17卷 399-413页

作者： Mingyao Li Lei peng Dejun Liu Jianping Zuo School of Mechanics and Civil Engineering China University of Mining and TechnologyBeijing100083China State key Laboratory for Tunnel Engineering China University of Mining and TechnologyBeijing100083China

The internal microstructures of rock materials, including mineral heterogeneity and intrinsic microdefects, exert a significant influence on their nonlinear mechanical and cracking behaviors. It is of great significance to accurately characterize the actual microstructures and their influence on stress and damage evolution inside the rocks. In this study, an image-based fast Fourier transform (FFT) method is developed for reconstructing the actual rock microstructures by combining it with the digital image processing (DIP) technique. A series of experimental investigations were conducted to acquire information regarding the actual microstructure and the mechanical properties. Based on these experimental evidences, the processed microstructure information, in conjunction with the proposed micromechanical model, is incorporated into the numerical calculation. The proposed image-based FFT method was firstly validated through uniaxial compression tests. Subsequently, it was employed to predict and analyze the influence of microstructure on macroscopic mechanical behaviors, local stress distribution and the internal crack evolution process in brittle rocks. The distribution of feldspar is considerably more heterogeneous and scattered than that of quartz, which results in a greater propensity for the formation of cracks in feldspar. It is observed that initial cracks and new cracks, including intragranular and boundary ones, ultimately coalesce and connect as the primary through cracks, which are predominantly distributed along the boundary of the feldspar. This phenomenon is also predicted by the proposed numerical method. The results indicate that the proposed numerical method provides an effective approach for analyzing, understanding and predicting the nonlinear mechanical and cracking behaviors of brittle rocks by taking into account the actual microstructure characteristics.

关键词： Rock microstructure Cracking process Brittle rocks Fast Fourier transform(FFT) Digital image processing(DIP)

Direct Observation of Early-Stage Polymer Crystallization Driven by Surface Wrinkling and Compressive Stress in Thin Films

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Chinese Journal of Polymer Science 2025年第2期43卷 360-367页

作者： peng Zhang Stephan V.Roth Peter Muller-Buschbaum Tian-Bai He School of Materials Science and Engineering Key Laboratory for Polymeric Composite and Functional Materials of Ministry of EducationInstitute of Green Chemistry and Molecular EngineeringSun Yat-sen UniversityGuangzhou510275China Deutsches Elektronen-Synchrotron(DESY) Notkestrasse 8522607HamburgGermany Department of Fibre and Polymer Technology KTH Royal Institute of TechnologyTeknikringen 56-58StockholmSE-10044Sweden TUM School of Natural Sciences Department of PhysicsChair for Functional MaterialsTechnical University of MunichJames-Franck-Str.1Garching85748Germany Heinz Maier-Leibnitz-Zentrum(MLZ) Technical University of MunichLichtenbergstr.1Garching85748Germany State key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryGraduate University of Chinese Academy of SciencesChinese Academy of SciencesChangchun130022China

The early stages of crystallization and occurrence of surface wrinkling were investigated using poly(butadiene)-block-poly(ε-caprolactone)with an ordered lamellar *** evidence has demonstrated that surface wrinkling precedes nucleation and crystal *** study examined the relationship between surface wrinkling,nucleation,and the formation of crystalline supramolecular structures using atomic force microscopy(AFM)and X-ray scattering *** wrinkling is attributed to curving induced by accumulated stresses,including residual stress from the sample preparation and thermal stress during *** stresses cause large-scale material flow and corresponding changes in the molecular conformations,potentially reducing the nucleation *** hypothesis is supported by the rapid crystal growth observed following the spread of surface ***,the surface curving of the polymer thin film creates local minima of the free energy,facilitating *** nuclei subsequently grow into crystalline supramolecular structures by incorporating polymer molecules from the *** mechanism highlights the role of localized structural inhomogeneity in the early stages of crystallization and provides new insights into structure formation processes.

关键词： Polymer crystallization Nucleation Surface wrinkling Stress Thin film

Insight into catalytic performance and reaction mechanism for toluene total oxidation over Cu-Ce supported catalyst

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Journal of Environmental Sciences 2025年第3期149卷 476-487页

作者： Xuan Liang Jin Zhang Juntai Tian Zenghua Xie Yue Liu peng Liu Daiqi Ye School of Environment and Energy South China University of TechnologyGuangzhou 510006China National Engineering Laboratory for VOCs Pollution Control Technology and Equipment Guangzhou 510006China Guangdong Provincial key Laboratory of Atmospheric Environment and Pollution Control South China University of TechnologyGuangzhou 510006China Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal South China University of TechnologyGuangzhou 510006China

Herein,three supported catalysts,CuO/Al_(2)O_(3),CeO_(2)/Al_(2)O_(3),and CuO-CeO_(2)/Al_(2)O_(3),were synthesized by the convenient impregnation method to reveal the effect of CeO_(2)addition on catalytic performance and reaction mechanism for toluene *** with CuO/Al_(2)O_(3),the T_(50)and T_(90)(the temperatures at 50%and 90%toluene conversion,respectively)of CuO-CeO_(2)/Al_(2)O_(3)were reduced by 33 and 39°C,respectively.N_(2)adsorptiondesorption experiment,XRD,SEM,EDS mapping,Raman,EPR,H_(2)-TPR,O_(2)-TPD,XPS,NH_(3)-TPD,Toluene-TPD,and in-situ DRIFTS were conducted to characterize these *** excellent catalytic performance of CuO-CeO_(2)/Al_(2)O_(3)could be attributed to its strong coppercerium interaction and high oxygen vacancies ***,in-situ DRIFTS proved that CuO-CeO_(2)/Al_(2)O_(3)promoted the conversion of toluene to benzoate and accelerated the deep degradation path of *** work provided valuable insights into the development of efficient and economical catalysts for volatile organic compounds.

关键词： Cu-Ce supported catalyst Copper-cerium interaction Oxygen vacancies Toluene oxidation Reaction mechanism

Tribo-piezoelectric hybrid nanogenerator based on temporary solution template process

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Science China(Technological Sciences) 2025年第2期68卷 97-105页

作者： Jinxian ZHANG peng PAN Zhengchun YANG Jie HE Peifeng ZENG College of Integrated Circuit Science and Engineering Tianjin University of TechnologyTianjin 300382China

In this study,a friction piezoelectric hybrid nanogenerator(HNG)with a sponge-like structure was developed.A novel temporary solution template process was proposed to create smaller,uniformly distributed pores within the sponge structure,allowing for the complete volatilization of the porous agent without causing structural *** output voltage of the porous HNG structure was nearly twice that of its solid structure,demonstrating superior electrical output performance.A peak-to-peak open circuit voltage of 168 V,a short circuit current density of 36.41μA cm^(-2),and a maximum power density of 32 W m^(-2) were obtained at a load resistance of 200 MΩ by periodically compressing an HNG with a dimension of 0.8 cm×0.8 *** generated electricity was sufficient to directly illuminate 180 tandem white LEDs and power small electronic *** addition,this study shows that the HNG could detect electrical signals from different parts of the human body during movement,suggesting significant potential for applications in energy harvesting and motion sensing.

关键词： PDMS hybrid nanogenerator triboelectric piezoelectric flexible composites

Extracting ship and heading from Sentinel-2 images using convolutional neural networks with point and vector learning

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Journal of Oceanology and Limnology 2025年第1期43卷 16-28页

作者： Xiunan LI peng CHEN Jingsong YANG Wentao AN Dan LUO Gang ZHENG Aiying LU Ocean College Zhejiang UniversityZhoushan 316021China State key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China National Satellite Ocean Application Service Ministry of Natural ResourcesBeijing 100081China

Obtaining accurate ship positions and headings in remote sensing images plays a crucial role in various ***,current deep learning-based methods primarily focus on ship position detection,while the detection of ship wakes relies on traditional non-deep learning approaches,which often underperform in complex marine *** proposed a novel,simple,and efficient method called Point-Vector *** proposed method leverages convolutional neural networks(CNN)for feature extraction and subsequently integrates multi-scale features to generate high-resolution feature *** the final stage,ship positions and headings are represented using a combination of points and *** experiments with results from automatic identification system(AIS)reports demonstrate that our method achieved impressive performance in two-class ship target detection,with an average precision of 96.4%,recall rate of 94.3%,and an F 1 score of 95.2%.Notably,the average heading error was 3.3°.The proposed model achieved a practical inference speed(FPS>30),and the average processing time for inferring a large-scale Sentinel-2 remote sensing image was 11.4 s.

关键词： deep learning ship detection heading remote sensing Sentinel-2

面向能源安全的省级平衡主体多资源统一调度框架

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电力自动化设备 2025年第1期45卷 184-191,216页

作者：胥鹏张志朱竞昌力王蓓蓓东南大学电气工程学院江苏南京210096 清华大学电机工程与应用电子技术系北京100084 国电南瑞科技股份有限公司江苏南京210061

针对新形势下省级平衡主体面临的能源安全挑战,提出一种多资源、多时间尺度、多颗粒度的统一调度框架。该框架以日前短期调度为基础,通过预测性调度考虑远期能源预测和市场交易总量,兼顾长周期计划的统筹配置作用与短周期计划的精准调... 详细信息

针对新形势下省级平衡主体面临的能源安全挑战,提出一种多资源、多时间尺度、多颗粒度的统一调度框架。该框架以日前短期调度为基础,通过预测性调度考虑远期能源预测和市场交易总量,兼顾长周期计划的统筹配置作用与短周期计划的精准调度能力。在模型中考虑天然气、跨省区购电以及本地需求响应等多种资源,充分挖掘多方资源的调节能力,实现多方资源的互济与补充。算例仿真结果表明,所提框架实现了全周期调度的高效日前求解,相较于传统固化的调度机制,所提框架对负荷的随机性具有更高的适应能力。

关键词：能源安全统一调度框架灵活性资源全周期调度资源互济

Diluent modified weakly solvating electrolyte for fast-charging high-voltage lithium metal batteries

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Chinese Chemical Letters 2025年第1期36卷 556-560页

作者： Haining peng Huijun Liu Chengzong Li Yingfu Li Qizhi Chen Tao Li School of Chemistry and Chemical Engineering University of South ChinaHengyang 421000China School of Resource Environment and Safety Engineering University of South ChinaHengyang 421000China

Weakly solvating electrolyte(WSE)demonstrates superior compatibility with lithium(Li)metal batteries(LMBs).However,its application in fast-charging high-voltage LMBs is ***,we propose a diluent modified WSE for fast-charging high-voltage LMBs,which is formed by adding diluent of 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether(TTE)into the tetrahydropyran(THP)based WSE.A relatively loose solvation structure is formed due to the formation of weak hydrogen bond between TTE and THP,which accelerates the de-solvation kinetics of Li~+.Besides,more anions are involved in solvation structure in the presence of TTE,yielding inorganic-rich interphases with improved ***(30μm)||Li Ni_(0.5)Co_(0.2)Mn_(0.3)O_(2)(4.1 mAh/cm^(2))batteries with the TTE modified WSE retain over 64%capacity retention after 175 cycles under high rate of 3 C and high-voltage of 4.5 V,much better than that with pure THP based *** work points out that the combination of diluent with weakly solvating solvent is a promising approach to develop high performance electrolytes for fast-charging high-voltage LMBs.

关键词： Lithium metal batteries Weakly solvating electrolyte Fast-charging High-voltage Diluent

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致密天体在活动星系核吸积盘中的迁移

科学通报 2025年第3期70卷 363-372页

作者：彭朋陈弦北京大学物理学院天文学系北京100871 北京大学科维理天文与天体物理研究所北京100871

对活动星系核吸积盘中恒星级致密天体的研究,始于20世纪人们对类星体光谱中金属发射线的观测和理论研究工作.近年来,由于引力波观测取得的长足进展,尤其是地面引力波探测器发现了一批大质量的恒星级双黑洞,相关的理论研究更加受到人们... 详细信息

对活动星系核吸积盘中恒星级致密天体的研究,始于20世纪人们对类星体光谱中金属发射线的观测和理论研究工作.近年来,由于引力波观测取得的长足进展,尤其是地面引力波探测器发现了一批大质量的恒星级双黑洞,相关的理论研究更加受到人们的重视.这些研究工作发现,星体在活动星系核吸积盘中的迁移过程对理解大质量致密天体的形成和演化具有重要作用.为了梳理这个领域的观测和理论进展,并且总结未来可能的发展方向,本文回顾了致密天体在活动星系核吸积盘中迁移的主要机制,其中包括与吸积盘撞击导致的星体角动量损失、潮汐力矩激发的密度波对星体的反作用、气体非开普勒运动导致的星体吸积和动力学摩擦效应,以及最近提出的一些新机制,如热力矩以及第三体的引力影响等.此外,本文还总结了与致密天体迁移过程相关的天文学观测现象,比如类星体金属增丰,以及恒星级双致密天体或者极端质量比旋近产生的引力波等.最后,本文总结了该领域仍然存在的一些重要理论问题以及值得进一步研究的方向.

关键词：引力波致密天体活动星系核吸积盘流体力学

Synthesis of chiral phosphine derivatives through a copper（I）-catalyzed desymmetric SNAr reaction

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Science China Chemistry 2025年

作者： Shuai Zhang Pei-zhi Liu Yan-Bo Li Qi Zhang Jun-Zhao Xiao Yi-Fan Wang Tian-Yu Wei Jia-Wei Jiang Ye Wang Qian peng Liang Yin key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences State key Laboratory of Elemento-Organic Chemistry and Tianjin key Laboratory of Biosensing and Molecular Recognition College of Chemistry Frontiers Science Center for New Organic Matter Nankai University Haihe Laboratory of Sustainable Chemical Transformations

Axially chiral phosphines are a class of extremely important ligands in asymmetric catalysis. Herein, an unprecedented copper（I）-catalyzed asymmetric SNAr reaction with HP（S）R2is uncovered, which delivers a series of axially chiral phosphine derivatives in high yields with excellent enantioselectivity. Furthermore, the diastereoselective reaction with the kinetic resolution of racemic HP（S）ArR proceeds smoothly, providing the products with moderate diastereoselectivity and excellent enantioselectivity. Control experiments indicate that HP（S）Ph2is much more active than HPPh2and HP（O）Ph2as the pronucleophile in the present reaction. It is found that the SNAr reaction （the first SNAr） proceeds in a desymmetric manner, providing the desired chiral products while a continued SNAr reaction （the second SNAr） slightly occurs in a kinetic resolution manner in the present catalytic system, which enhances the ee of the desired chiral products. DFTcalculations support a concerted reaction pathway rather than a step-wise mechanism. Finally, axially chiral olefin-phosphines produced by the present method work as suitable ligands in Pdcatalyzed asymmetric allylic substitution with C-, N-, and O-nucleophiles and Rh-catalyzed asymmetric addition of arylboronic acid to benzil.

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