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Multiatom activation of single-atom electrocatalysts via remote coordination for ultrahigh-rate two-electron oxygen reduction

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Journal of Energy Chemistry 2023年第1期76卷 622-630,I0015页

作者： Xiaoqing Liu Rui Chen Wei Peng Lichang yin De'an Yang Feng Hou Liqun Wang Ji Liang Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin UniversityTianjin 300072China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina Applied Physics Department College of Physics and Materials ScienceTianjin Normal UniversityTianjin 300387China

Electrocatalytic oxygen reduction via a two-electron pathway(2e^(-)-ORR)is a promising and eco-friendly route for producing hydrogen peroxide(H_(2)O_(2)).Single-atom catalysts(SACs)typically show excellent selectivity towards 2e^(-)-ORR due to their unique electronic structures and geometrical *** very low density of single-atom active centers,however,often leads to unsatisfactory H_(2)O_(2)yield rate,significantly inhibiting their practical *** this,we herein introduce fluorine as a secondary doping element into conventional SACs,which does not directly coordinate with the singleatom metal centers but synergize with them in a remote *** strategy effectively activates the surrounding carbon atoms and converts them into highly active sites for 2e^(-)-***,a record-high H_(2)O_(2)yield rate up to 27 mol g^(-1)h^(-1)has been achieved on the Mo–F–C catalyst,with high Faradaic efficiency of 90%.Density functional theory calculations further confirm the very kinetically facile 2e^(-)-ORR over these additional active sites and the superiority of Mo as the single-atom center to *** strategy thus not only provides a high-performance electrocatalyst for 2e^(-)-ORR but also should shed light on new strategies to significantly increase the active centers number of SACs.

关键词： Hydrogen peroxide Oxygen reduction reaction Two-electron pathway Remote coordination Electrocatalysis

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Verification of a Modified Nonhydrostatic Global Spectral Dynamical Core Based on the Dry-Mass Vertical Coordinate: Three-Dimensional Idealized Test Cases

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Journal of Meteorological Research 2023年第3期37卷 286-306页

作者： Jun PENG Jianping WU Xiangrong YANG Jun ZHAO Weimin ZHANG Jinhui YANG Fukang yin College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073

The newly developed nonhydrostatic(NH)global spectral dynamical core is evaluated by using three-dimensional(3D)benchmark tests with/without *** new dynamical core differs from the original Aladin-NH like one in the combined use of a dry-mass vertical coordinate and a new temperature variable,and thus,it inherently conserves the dry air mass and includes the mass sink effect associated with precipitation *** 3D dry benchmark tests are first conducted,including steady state,dry baroclinic waves,mountain waves in non-sheared and sheared background flows,and a dry Held–Suarez *** results from these test cases demonstrate that the present dynamical core is accurate and robust in applications on the sphere,especially for addressing the nonhydrostatic ***,three additional moist test cases are conducted to further explore the improvement of the new dynamical ***,in contrast to the original Aladin-NH like one,the new dynamical core prefers to obtain simulated tropical cyclone with lower pressure,stronger wind speeds,and faster northward movement,which is much closer to the results from the Model for Prediction Across Scales(MPAS),and it also enhances the updrafts and provides enhanced precipitation rate in the tropics,which partially compensates the inefficient vertical transport due to the absence of the deep convection parameterization in the moist Held–Suarez test,thus demonstrating its potential value for full-physics global NH numerical weather prediction application.

关键词： nonhydrostatic global spectral dynamical core idealized tests mountain waves tropical cyclone

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Clathrin light chains regulate hypocotyl elongation by affecting the polarization of the auxin transporter PIN3 in Arabidopsis

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Journal of Integrative Plant Biology 2021年第11期63卷 1922-1936页

作者： Tianwei Hu Shoupeng yin Jingbo Sun Yuting Linghu Jiaqi Ma Jianwei Pan Chao Wang Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations School of Life SciencesLanzhou UniversityLanzhou 730000China College of Chemistry and Life Sciences Zhejiang Normal UniversityJinhua 321004China College of Life Sciences Shaoxing UniversityShaoxing 312000China

PIN-FORMED(PIN)-dependent directional auxin transport is crucial for plant development. Although the redistribution of auxin mediated by the polarization of PIN3 plays key roles in modulating hypocotyl cell expansion, how PIN3 becomes repolarized to the proper sites within hypocotyl cells is poorly understood. We previously generated the clathrin light chain clc2-1 clc3-1 double mutant in Arabidopsis thaliana and found that it has an elongated hypocotyl phenotype compared to the wild type. Here, we performed genetic, cell biology, and pharmacological analyses combined with live-cell imaging to elucidate the molecular mechanism underlying the role of clathrin light chains in hypocotyl elongation. Our analyses indicated that the defects of the double mutant enhanced auxin maxima in epidermal cells, thus, promoting hypocotyl elongation. PIN3 relocated to the lateral sides of hypocotyl endodermal cells in clc2-1 clc3-1 mutants to redirect auxin toward the epidermal cell ***, the loss of function of PIN3 largely suppressed the long hypocotyl phenotype of the clc2-1 clc3-1 double mutant, as did treatment with auxin transport inhibitors. Based on these data, we propose that clathrin modulates PIN3 abundance and polarity to direct auxin flux and inhibit cell elongation in the hypocotyl, providing novel insights into the regulation of hypocotyl elongation.

关键词： Arabidopsis auxin clathrin light chains hypocotyl elongation PIN3

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Precise Synthesis of Organic Heterostructures via the Synergy Approach of Polymorphism and Cocrystal Engineering for Optical Applications

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Chinese Journal of Chemistry 2022年第10期40卷 1149-1155页

作者： Huiling yin yingxin Ma Hongtao Lin Shuhai Chen Ziyan Zhou Shuping Zhuo Xuedong Wang School of Chemistry and Chemical Engineering Shandong University of TechnologyZiboShandong 255000China Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices Institute of Functional Nano&Soft Materials(FUNSOM)Soochow UniversitySuzhouJiangsu 215123China

Organic heterostructures that can integrate the physiochemical properties of two or more substances have atracted widespread attention in the field of ***,the epitaxial growth process between different organic material molecules is unpredictable,and the precise synthesis of organic heterostructures is stll particularly ***,through the synergy approach of polymorphism and cocrystal engineering,a series of organic branched heterostructures have been successfully ***,by simply adjusting the solvent ratio,different crystalline phases of perylene microplates can be epitaxilly grown on the perylene-OFN cocrystal microwires,which provides a feasible approach for the preparation of organic ***,these as-prepared organic branched heterostructures can realize multi-channel and multi-color emission,and act as optical logic gates,which promotes the multifunctional integrated optoelectronics.

关键词： Organic semiconductor molecules Polymorphism Synthesis design Epitaxial growth Organic photonics

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Demand Flexibility of Residential Buildings:Definitions,Flexible Loads,and Quantification Methods

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Engineering 2022年第9期16卷 123-140页

作者： Zhengyi Luo Jinqing Peng Jingyu Cao Rongxin yin Bin Zou Yutong Tan Jinyue Yan College of Civil Engineering Hunan UniversityChangsha 410006China Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education Changsha 410006China School of Business Society&EngineeringMälardalen UniversityVasteras 999027Sweden

This paper reviews recent research on the demand flexibility of residential buildings in regard to definitions,flexible loads,and quantification methods.A systematic distinction of the terminology is made,including the demand flexibility,operation flexibility,and energy flexibility of buildings.A comprehensive definition of building demand flexibility is proposed based on an analysis of the existing ***,the flexibility capabilities and operation characteristics of the main residential flexible loads are summarized and *** and evaluation indicators to quantify the flexibility of these flexible loads are reviewed and *** research gaps and challenges are identified and analyzed as *** results indicate that previous studies have focused on the flexibility of central air conditioning,electric water heaters,wet appliances,refrigerators,and lighting,where the proportion of studies focusing on each of these subjects is 36.7%,25.7%,14.7%,9.2%,and 8.3%,*** flexible loads are different in running modes,usage frequencies,seasons,and capabilities for shedding,shifting,and modulation,while their response characteristics are not yet ***,recommendations are given for the application of white-,black-,and grey-box models for modeling flexible loads in different *** static flexibility evaluation indicators that are based on the aspects of power,temporality,energy,efficiency,economics,and the environment have been proposed in previous publications,but a consensus and standardized evaluation framework is *** review can help readers better understand building demand flexibility and learn about the characteristics of different residential flexible loads,while also providing suggestions for future research on the modeling techniques and evaluation metrics of residential building demand flexibility.

关键词： Residential building Demand flexibility Flexible loads Modeling techniques Quantification indicators

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面向大规模图像检索的哈希学习综述

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软件学报 2025年第1期36卷 79-106页

作者：张雪凝刘兴波宋井宽聂秀山王少华尹义龙山东大学软件学院山东建筑大学计算机科学与技术学院电子科技大学计算机科学与工程学院

随着互联网空间中图像数据的爆发式增长和图像应用领域的拓宽,大规模图像检索的需求与日俱增.哈希学习为大规模图像检索提供显著的存储与检索效率,并成为近年来一个研究热点.现有哈希学习综述存在着时效性弱与技术路线不清晰的问题,即... 详细信息

随着互联网空间中图像数据的爆发式增长和图像应用领域的拓宽,大规模图像检索的需求与日俱增.哈希学习为大规模图像检索提供显著的存储与检索效率,并成为近年来一个研究热点.现有哈希学习综述存在着时效性弱与技术路线不清晰的问题,即多总结5–10年前的研究成果,且较少总结哈希学习算法各组成部分间的关联关系.鉴于此,通过总结近20年公开发表的哈希学习文献,对面向大规模图像检索的哈希学习进行系统的综述性研究.首先,介绍哈希学习的技术路线和哈希学习算法的主要组成部分,包括损失函数、优化策略及样本外扩展映射.其次,将面向图像检索的哈希学习算法分为无监督哈希方法和监督哈希方法两类,并分别梳理每类方法的研究现状和演化过程.然后,介绍哈希学习算法评估通用的图像数据集与评估指标,并通过对比实验分析部分经典算法的性能.最后,结合哈希学习的局限性与新挑战对其发展前景进行阶段性总结与展望.

关键词：图像检索大规模数据近似最近邻检索哈希学习相似性保持

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Fast scanning growth of high-quality graphene films on Cu foils fueled by dimeric carbon precursor

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Nano Research 2023年第10期16卷 12246-12252页

作者： Heng Chen Xiucai Sun Xiaofeng Song Buhang Chen Ziteng Ma Wanjian yin Luzhao Sun Zhongfan Liu Center for Nanochemistry Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Beijing Graphene Institute Beijing 100095China College of Materials Science and Technology Beijing University of Chemical TechnologyBeijing 100029China College of Energy Soochow Institute for Energy and Materials InnovationS(SIEMIS)Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSUDA-BGI Collaborative Innovation CenterSoochow UniversitySuzhou 215006China

Carbon source precursor is a critical factor governing chemical vapor deposition growth of graphene ***(CH4),has been the most commonly used precursor in the last decade,but it presents challenges in terms of decomposition efficiency and growth *** we thoroughly evaluated acetylene(C2H_(2)),a precursor that is probably for providing carbon dimer(C2)species,for fast growth of large-scale graphene *** find that the graphene growth behaviors fueled by C2H_(2) exhibit unconventional localized growth behavior with significant advantages in terms of high growth rate,which mainly ascribe to the as-decomposed C2 ***,a C2-fueled scanning growth strategy is proposed,and the fast scanning growth rate of 40 cm/min was experimentally *** growth strategy is compatible with the approach of unidirectional growth of single-crystal graphene films,and the as-grown graphene films are of *** work demonstrates a reliable and promising strategy for the rapid synthesis of high-quality graphene film and may pave the avenue to cost-effective mass production of graphene materials in the roll-to-roll system.

关键词： graphene film chemical vapor deposition fast growth carbon dimer roll-to-roll production

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Effects of long-term nitrogen addition on theδ^(15)N andδ^(13)C of Larix gmelinii and soil in a boreal forest

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Ecological Processes 2022年第1期11卷 491-502页

作者： Guancheng Liu Zhiwei yin Guoyong Yan Shuang Liu Xiaochun Wang Yajuan Xing Qinggui Wang School of Life Sciences Qufu Normal University57 Jingxuan West RoadQufu 273165China Department of Agricultural Resource and Environment Heilongjiang University74 Xuefu RoadHarbin 150080China Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education School of ForestryNortheast Forestry UniversityHarbin 150040China

Background:Natural abundance of carbon(C)and nitrogen(N)stable isotope ratios(δ^(13)C andδ^(15)N)has been used to indicate the state and cycle of ecosystem C and ***,it is still unclear how C and N cycle of boreal forests respond to the N ***:We conducted an 8-year continuous N addition field experiment in a Larix gmelinii forest in Greater Khingan Mountains,Northeast *** N treatments(0,25,50,75 kg N ha^(−1)year^(−1))were *** effects of N addition on theδ^(13)C andδ^(15)N of needle,branch,bark,and fine root of Larix gmelinii and soil were *** result of the balance between the N input and output flux showed that N addition significantly increased theδ^(15)N in each organ of Larix gmelinii,but did not change theδ^(15)N of *** also found that the N absorption by needles of Larix gmelinii could increase the needle photosynthesis rate andδ^(13)C by increasing carboxylation,but N addition had no significant effect on theδ^(13)C of soil and other *** addition,both the soilδ^(15)N andδ^(13)C increased with the soil ***:Long-term N addition may lead to more open C and N cycles and further affect plant nutrient acquisition strategies in boreal forest ecosystems.

关键词： Nitrogen deposition Stable isotope technology Natural abundance of carbon Natural abundance of nitrogen Boreal forest

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Theoretical screening,intrinsic brittleness and thermal properties of the S-containing MAX carbides and borides

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Journal of Materiomics 2023年第6期9卷 1056-1066页

作者： Zhiyao Lu Xiaodong He Hang yin Jinze Zhang Guangping Song Yongting Zheng Yuelei Bai National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structure Harbin Institute of TechnologyHarbin150080China

To respond the recent experimental advances,the phase stability,mechanical properties,phonon as well as infrared-and Raman-active modes,thermal expansion and heat capacity were investigated by density functional theory for the S-containing MAX carbides and borides(M fromⅢB toⅧB),of importance,well consistent with the available experimental *** examining the thermodynamic competition with all the competing phases and intrinsic stability by their lattice dynamics,18 MAX phases were screened out from 138 *** the“bond stiffness”model as well as the associated criterion for damage tolerance and fracture toughness,the ratio of bond stiffness of weakest M-S to the strongest MX bonds(k_(min)/k_(max))over 1/2 indicates their intrinsic brittleness of all S-containing MAX phases except *** the contributions from phonon and electrons,their linear thermal expansion coefficients[(8.1e13.6)×10^(-6)K^(-1),300-1,300 K]and heat capacities(Cp)as a function of temperature are *** much interest,a well-established relationship between molar C_(p)of the MAX and MX phases is theoretically deduced in the present work.

关键词： Phase stability Intrinsic brittleness Thermal expansion Heat capacity

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Sex determination mechanisms and sex control approaches in aquaculture animals

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Science China(Life Sciences) 2022年第6期65卷 1091-1122页

作者： Xi-yin Li Jie Mei Chu-Tian Ge Xiao-Li Liu Jian-Fang Gui State Key Laboratory of Freshwater Ecology and Biotechnology Hubei Hongshan LaboratoryThe Innovative Academy of Seed DesignInstitute of HydrobiologyChinese Academy of SciencesUniversity of Chinese Academy of SciencesWuhan 430072China College of Fisheries Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070China College of Biological and Environmental Sciences Zhejiang Wanli UniversityNingbo 315100China Key Laboratory of Tropical&Subtropical Fishery Resource Application&Cultivation of Ministry of Agriculture and Rural Affairs Pearl River Fisheries Research InstituteChinese Academy of Fishery SciencesGuangzhou 510380China

Aquaculture is one of the most efficient modes of animal protein production and plays an important role in global food *** animals exhibit extraordinarily diverse sexual phenotypes and underlying mechanisms,providing an ideal system to perform sex determination research,one of the important areas in life ***,sex is also one of the most valuable traits because sexual dimorphism in growth,size,and other economic characteristics commonly exist in aquaculture ***,we synthesize current knowledge of sex determination mechanisms,sex chromosome evolution,reproduction strategies,and sexual dimorphism,and also review several approaches for sex control in aquaculture animals,including artificial gynogenesis,application of sex-specific or sex chromosome-linked markers,artificial sex reversal,as well as gene *** anticipate that better understanding of sex determination mechanisms and innovation of sex control approaches will facilitate sustainable development of aquaculture.

关键词： sex determination sex control approach sexual dimorphism sex chromosome sex change reproduction strategy sex reversal

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