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Unravelling the critical role of surface Nafion adsorption in Ptcatalyzed oxygen reduction reaction by in situ electrical transport spectroscopy

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Science China Chemistry 2022年第11期65卷 2290-2298页

作者： Yamei Sun Jingyi Tian zhangyan Mu Bailin Tian Qiulan Zhou Cheng Liu Shengtang Liu Qiang wu Mengning Ding Key Laboratory of Mesoscopic Chemistry of MOE State Key Laboratory of Analytical Chemistry for Life SciencesSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China

Solid-state ionic conductor is a vital part in all electrochemical energy conversion devices. As a widely-applied protonconducting polymer and stabilizer for electrode preparation, Nafion has key applications in electrochemical devices operated under acidic conditions. Specific adsorption of Nafion on the catalyst surface is considered to result in partial loss of intrinsic activity in reactions such as oxygen reduction reaction(ORR), due to its comprehensive occupation of active sites. Many in situ characterization methods such as voltammetric fingerprinting and spectroscopic approaches have been used to explore the dynamic adsorption of Nafion on the electrode surface. However, most of current efforts have been focused on the behaviors of Nafion itself, with little attention paid to its effects on the adsorption of surface intermediates. Here, we employed the in situ electrical transport spectroscopy(ETS) to investigate Nafion adsorption on Pt catalysts and its effects on the ORR *** findings suggest that specific adsorption of Nafion results in the increased coverage of oxygen intermediates with weaker adsorption strength, which in turn plays a critical role in the reaction selectivity. The successful application of ETS on the dynamic characterization of reaction intermediates provides a novel perspective for catalyst design in ORR-related applications in future sustainable chemistry.

关键词： electrical transport spectroscopy Nafion adsorption oxygen reduction reaction platinum hydrogen peroxide

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Molecule-based vertical transistor via intermolecular charge transport throughπ-πstacking

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Nano Research 2024年第5期17卷 4573-4581页

作者： Cheng Liu Cheng Fu Lingyu Tang Jianghua wu zhangyan Mu Yamei Sun Yanghang Pan Bailin Tian Kai Bao Jing Ma Qiyuan He Mengning Ding Key Laboratory of Mesoscopic Chemistry School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China

Theπ-πstacking is a well-recognized intermolecular interaction that is responsible for the construction of electron hopping channels in numerous conducting frameworks/***,the exact role ofπ-to-πchannels within typical single crystalline organic semiconductors remains unclear as the orientations of these molecules are diverse,and their control usually requires additional side chain groups that misrepresent the intrinsic properties of the original semiconducting ***,the construction of conduction channels with intrinsicπ-πstacking in the molecule-based device is crucial for the utilization of their unique transport characteristics and understanding of the transport *** this end,we present a molecular intercalation strategy that integrates two-dimensional layered materials with functional organic semiconductor molecules for functional molecule-based *** organic semiconductor molecules can be effectively intercalated into the van der Waals gaps of semi-metallic TaS_(2) withπ-πstacking configuration and controlled intercalant *** results show that the vertical charge transport in the stacking direction shows a tunneling-dominated mechanism that strongly depends on the molecular ***,we demonstrated a new type of molecule-based vertical transistor in which TaS_(2) andπ-πstacked organic molecules function as the electrical contact and the active channel,***/off ratios as high as 447 are achieved under electrostatic modulation in ionic liquid,comparable to the current state-of-the-art molecular *** study provides an ideal platform for probing intrinsic charge transport acrossπ-πstacked conjugated molecules and also a feasible approach for the construction of high-performance molecule-based electronic devices.

关键词： π-πstacking electrochemical intercalation organic semiconductor electrical transport tunneling field effect transistor

Molecular detection of the powdery mildew resistance genes in winter wheats DH51302 and Shimai 26

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Journal of Integrative Agriculture 2020年第4期19卷 931-940页

作者： QU Yun-feng wu Pei-pei HU Jing-huang CHEN Yong-xing SHI Zhan-liang QIU Dan LI Ya-hui ZHANG Hong-jun ZHOU Yang YANG Li LIU Hong-wei ZHU Tong-quan LIU Zhi-yong zhangyan-ming LI Hong-jie Key Laboratory of Molecular Cytogenetic and Genetic Breeding of Heilongjiang Province/College of Life Science and Technology Harbin Normal UniversityHarbin 150025P.R.China National Engineering Laboratory for Crop Molecular Breeding/Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Institute of Genetics and Developmental Biology Chinese Academy of SciencesBeijing 100101P.R.China Shijiazhuang Academy of Agricultural and Forestry Sciences Shijiazhuang 050041P.R.China Wheat Research Institute Zhumadian Academy of Agricultural SciencesZhumadian 463000P.R.China

Resistance to powdery mildew is an important trait of interest in many wheat breeding programs. The information on genes conferring resistance to powdery mildew in wheat cultivars is useful in parental selection. Winter wheat breeding line DH51302 derived from Liangxing 99 and cultivar Shimai 26 derived from Jimai 22 showed identical infection patterns against 13 isolates of Blumeria graminis f. sp. tritici(Bgt) that causes wheat powdery mildew. DH51302 and Shimai 26 were crossed to a powdery mildew susceptible cultivar Zhongzuo 9504 and the F2:3 families were used in molecular localization of the resistance genes. Fourteen polymorphic markers, which were linked to Pm52 from Liangxing 99, were used to establish the genetic linkage maps for the resistance genes Pm DH51302 and Pm SM26 in DH51302 and Shimai 26, respectively. These genes were placed in the same genetic interval where Pm52 resides. Analysis of gene-linked molecular markers indicated that Pm DH51302 and Pm SM26 differed from other powdery mildew resistance genes on chromosome arm 2 BL, such as Pm6, Pm33, Pm51, Ml Zec1, Ml AB10, and Pm64. Based on the results of reaction patterns to different Bgt isolates and molecular marker localization, together with the pedigree information, DH51302 and Shimai 26 carried the same gene, Pm52, which confers their resistance to powdery mildew.

关键词： Triticum aestivum Blumeria graminis f.sp.tritici Pm52 molecular mapping

计算机视觉结构健康监测的研究进展及在大型游乐设施上的应用展望

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机械工程学报 2023年第16期59卷 167-181页

作者：于宗营沈功田赵章焰吴占稳刘渊武汉理工大学交通与物流工程学院武汉430063 中国特种设备检测研究院国家市场监管重点实验室(特种设备安全与节能) 北京100029

在生产生活中,设备设施结构安全对保障国家经济运行和人民日常生活至关重要。结构健康监测能够有效的提高设备设施结构的安全性和稳定性。随着计算机视觉测量技术的发展和硬件水平的提升,基于计算机视觉测量的结构健康监测技术受到越来... 详细信息

在生产生活中,设备设施结构安全对保障国家经济运行和人民日常生活至关重要。结构健康监测能够有效的提高设备设施结构的安全性和稳定性。随着计算机视觉测量技术的发展和硬件水平的提升,基于计算机视觉测量的结构健康监测技术受到越来越多的关注。计算机视觉测量已经被广泛应用于结构的表面缺陷、空间坐标、位移、拉索索力等监测领域中,但是在大型游乐设施的结构健康监测中应用较少。介绍计算机视觉概况,综述了研究进展并进行了应用展望。首先,通过时间顺序梳理了计算机视觉的发展历程;然后概述了计算机视觉测量的硬件组成和软件组成部分,指出各组成部分的主要特征;主要分类介绍计算机视觉测量技术在各领域的应用现状,并与传统测量方法对比分析,概括各种方法的特点和不足;最后对计算机视觉测量技术在大型游乐设施结构健康监测中的应用做出展望,指出了计算机视觉测量技术在大型游乐设施结构健康监测中的主要研究方向和重点任务。

关键词：计算机视觉主要组成应用现状结构健康监测大型游乐设施

Haplotype-resolved genome of diploid ginger (Zingiber officinale) and its unique gingerol biosynthetic pathway

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Horticulture Research 2021年第1期8卷 2546-2558页

作者： Hong-Lei Li Lin wu Zhaoming Dong Yusong Jiang Sanjie Jiang Haitao Xing Qiang Li Guocheng Liu Shuming Tian zhangyan wu Bin wu Zhexin Li Ping Zhao Yan Zhang Jianmin Tang Jiabao Xu Ke Huang Xia Liu Wenlin Zhang Qinhong Liao Yun Ren Xinzheng Huang Qingzhi Li Chengyong Li Yi Wang Baskaran Xavier-Ravi Honghai Li Yang Liu Tao Wan Qinhu Liu Yong Zou Jianbo Jian Qingyou Xia Yiqing Liu College of Landscape Architecture and Life Science/Institute of Special Plants Chongqing University of Arts and SciencesYongchuanChongqingChina Engineering Research Center for Special Plant Seedlings of Chongqing Chongqing University of Arts and SciencesYongchuanChongqingChina State Key Laboratory of Silkworm Genome Biology Biological Science Research CenterSouthwest UniversityBeibeiChongqingChina BGI Genomics BGI-ShenzhenShenzhenGuangdongChina College of Biology and Food Engineering Chongqign Three Gorges UniversityWanzhouChongqingChina Department of Entomology and MOAKey Lab of Pest Monitoring and Green Management College of Plant ProtectionChina Agricultural UniversityHaidianBeijingChina Jinan Second Agricultural Science Research Institute JinanShandongChina Savari Research Foundation Mela Ilandai KulamTamil NaduIndia Institute of Advanced Interdisciplinary Studies Chongqing UniversityChongqingChina Fairy Lake Botanical Garden and Chinese Academy of Sciences ShenzhenGuangdongChina Ningyang Science and Technology Bureau TaianShandongChina College of Horticulture and Gardening Yangtze UniversityJingzhouHubeiChina

Ginger(Zingiber officinale),the type species of Zingiberaceae,is one of the most widespread medicinal plants and ***,we report a high-quality,chromosome-scale reference genome of ginger‘Zhugen’,a traditionally cultivated ginger in Southwest China used as a fresh vegetable,assembled from PacBio long reads,Illumina short reads,and high-throughput chromosome conformation capture(Hi-C)*** ginger genome was phased into two haplotypes,haplotype 1(1.53 Gb with a contig N50 of 4.68 M)and haplotype 0(1.51 Gb with a contig N50 of 5.28 M).Homologous ginger chromosomes maintained excellent gene pair *** 17,226 pairs of allelic genes,11.9%exhibited differential expression between *** on the results of ginger genome sequencing,transcriptome analysis,and metabolomic analysis,we proposed a backbone biosynthetic pathway of gingerol analogs,which consists of 12 enzymatic gene families,PAL,C4H,4CL,CST,C3’H,C3OMT,CCOMT,CSE,PKS,AOR,DHN,and *** analyses also identified the likely transcription factor networks that regulate the synthesis of gingerol ***,this study serves as an excellent resource for further research on ginger biology and breeding,lays a foundation for a better understanding of ginger evolution,and presents an intact biosynthetic pathway for species-specific gingerol biosynthesis.

关键词： backbone maintained analogs

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攀爬机器人磁吸附组件优化设计与仿真

机械设计与研究 2019年第5期35卷 184-189页

作者：赵章焰李钟谷吴占稳武汉理工大学物流工程学院武汉430063 中国特种设备检测研究院北京100013

为满足大型起重机危险部位的检测需求,设计一种具有较强越障能力的磁吸附金属攀爬机器人。机器人可携带高清图传设备、机械臂以及其他金属检测设备。针对一种磁吸附机器人设计出独特的磁吸附组件,进行多个维度的分析仿真与优化,确保机... 详细信息

为满足大型起重机危险部位的检测需求,设计一种具有较强越障能力的磁吸附金属攀爬机器人。机器人可携带高清图传设备、机械臂以及其他金属检测设备。针对一种磁吸附机器人设计出独特的磁吸附组件,进行多个维度的分析仿真与优化,确保机器人在大型起重机上的各个侧面工作时,能有效抵抗倾覆、脱落、翻滚或滑移。为确保永磁体以尽可能小的质量获得尽可能大的吸附力,特别引入"磁质比"概念。通过有限元分析软件进行仿真优化,得到最优规格并制作出机器人实物,验证仿真优化的可靠性。

关键词：攀爬机器人有限元分析磁质比永磁体

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简约古雅,推陈出新——汉代四言诗风格特征

福建师大福清分校学报 2010年第4期28卷 39-43页

作者：吴章燕福建师范大学福清分校人文科学系福建福清350300

历来都认为汉代的四言诗创作成就很低,本文从汉代四言诗的风格特征以及四言诗与音乐的关系来阐述它的创新之处,以此证明它在诗歌史上的地位。同时,四言诗体虽然声势渐弱但它在汉代的转化与流变,影响着汉以后四言诗体及其他许多文体的发展。

关键词：汉代四言诗风格

考虑温度影响的改进西原流变模型及一维固结解

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水文地质工程地质 2020年第1期47卷 53-61页

作者：陈航刘干斌郭华周晔吴章俨宁波大学岩土工程研究所

随着我国热能源开发,热力管道工程大规模应用,由此带来的岩土体应力、变形、渗流和温度耦合作用问题已经成为岩土工程领域的研究热点。在长期荷载作用下,岩土体的变形和强度随时间而变化,尤其是软土,具有明显的流变特征。传统的各流变... 详细信息

随着我国热能源开发,热力管道工程大规模应用,由此带来的岩土体应力、变形、渗流和温度耦合作用问题已经成为岩土工程领域的研究热点。在长期荷载作用下,岩土体的变形和强度随时间而变化,尤其是软土,具有明显的流变特征。传统的各流变模型并未考虑升温方式和温度对其各参数的影响。为了能更好地反映流变固结特性,考虑软黏土的黏弹塑性,在西原模型基础上,引入温度膨胀系数,建立了热力耦合作用下的改进西原模型,给出了其应力-应变关系,并利用Laplace变换和逆变换求解了一维热固结方程,得到了其解析解。计算结果表明:固结压力一定时,温度升高加快土体固结;温度一定时,土体中孔压随固结压力增大而减小;改进西原模型的弹性模量越大,孔压消散速率越大,土体固结越快;土颗粒受温度影响而产生的热膨胀对于孔压消散的作用非常小;黏滞系数越小,孔压消散更快,土体固结越快;试验结果与考虑土体的黏弹塑性的热力耦合改进西原模型计算结果吻合,改进西原模型可以较好地描述土体的热力耦合特性。

关键词：热力耦合西原模型塑性流变固结解析解

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论沾溉众体的两汉四言诗

福建师大福清分校学报 2007年第6期25卷 48-52页

作者：吴章燕福建师范大学福清分校人文科学系福建福清350300

历来都认为汉代的诗歌创作成就很低,尤其是四言诗的创作更是处于衰落之境。从两汉四言诗的传衍方面着手来阐明四言诗体在其他文体中的运用,发现大量四言的韵文韵语存在于辞赋、骈文以及颂、赞、铭箴、碑诔等应用文体中,各具特点并影响... 详细信息

历来都认为汉代的诗歌创作成就很低,尤其是四言诗的创作更是处于衰落之境。从两汉四言诗的传衍方面着手来阐明四言诗体在其他文体中的运用,发现大量四言的韵文韵语存在于辞赋、骈文以及颂、赞、铭箴、碑诔等应用文体中,各具特点并影响着汉以后许多文体的发展。

关键词：两汉四言诗文体