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Formic acid electro-oxidation:Mechanism and electrocatalysts design

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Nano Research 2023年第3期16卷 3607-3621页

作者： Tongtong Yang Shuai Hou Jiaojiao Xing Changpeng Liu Junjie ge Wei Xing State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Chinese Academy of Sciences Beijing 100039China

As a model reaction for the electrooxidation of many small organic molecules,formic acid electrooxidation(FAEO)has aroused wide *** promises of direct formic acid fuel cells(DFAFC)in application further strengthen people’s attention to the related ***,despite decades of study,the FAEO mechanism is still under debate due to the multi-electron and multi-pathway nature of the catalytic *** this review,the progresses towards understanding the FAEO mechanism along with the developed methodology(electrochemistry,in-situ spectroscopy,and theoretical calculation and simulation)are *** especially focused on the construction of anti-poisoning catalysts system based on understanding of the catalytic mechanism,with anti-poisoning catalyst design being systemically ***,we provide a brief summarization for current challenges and future prospects towards FAEO study.

关键词： formic acid electrooxidation mechanism anti-poisoning methodology in-situ technique electrocatalysts design

Ultrafine PdAg alloy nanoparticles anchored on NH2.functionalized 2./2. TiO_(2. nanosheet/rGO composite as efficient and reusable catalyst for hydrogen release from additive-free formic acid at room temperature

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Journal of Energy Chemistry 2021年第8期30卷 455-464,I0010页

作者： Xi Zhao Ping Dai Dongyan Xu Xumei Tao Xien Liu Qingjie ge State Key Laboratory Base of Eco-chemical Engineering College of Chemical EngineeringQingdao University of Science&TechnologyQingdao 266042China Shandong Provincial Key Laboratory Of Polymer Material Advanced Manufacturing Technology College of Electromechanical EngineeringQingdao University of Science&TechnologyQingdao 266061China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering College of Chemistry and Chemical EngineeringNingxia University750021 YinchuanChina

A 2.D-2.D titanium dioxide nanosheet-reduced graphene oxide(TNS-r GO)composite with better electronic conductivity and hydrophilicity was prepared by the hydrothermal *** as-obtained TNS-r GO composite was further functionalized with 3-aminopropyltriethoxysilane(APTES)to provide a large amount of-NH2.groups on the surface for anchoring ultrafine Pd Ag alloy nanoparticles with an average particle size of 1.69 nm by a facile wet reduction *** from the combined effects of well-dispersed Pd Ag alloy nanoparticles,facilitated electron transfer from TNS-r GO to Pd,and increased electron density of active sites,the Pd8 Ag_(1)/NH_(2.-TNS-r GO catalyst exhibited excellent activity towards dehydrogenation of formic acid without adding any additives at 2.8 K,corresponding to an initial turn over frequency as high as 1090 h-1,which is much higher than that of most other state-of-theart catalysts.

关键词： Formic acid Dehydrogenation TNS-rGO composite PdAg alloy Amine-functionalization

geminiviral C2.proteins inhibit active autophagy to facilitate virus infection by impairing the interaction of ATG7 and ATG8

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Journal of Integrative Plant Biology 2023年第5期65卷 1328-1343页

作者： Buwei Cao Linhao ge Mingzhen Zhang Fangfang Li Xueping Zhou State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China State Key Laboratory of Rice Biology Institute of BiotechnologyZhejiang UniversityHangzhou 310058China

Autophagy is a conserved intracellular degradation process that plays an active role in plant response to virus *** we report that geminiviruses counteract activated autophagymediated antiviral defense in plant cells through the C2.proteins they *** found that,in Nicotiana benthamiana plants,tomato leaf curl Yunnan virus(TLCYnV)infection upregulated the transcription levels of autophagy-related genes(ATGs).Overexpression of NbATG5,NbATG7,or NbATG8a in *** plants decreased TLCYnV accumulation and attenuated viral ***,transgenic overexpression of NbATG7 promoted the growth of *** plants and enhanced plant resistance to *** further revealed that the C2.protein encoded by TLCYnV directly interacted with the ubiquitinactivating domain of *** interaction competitively disrupted the ATG7–ATG8 binding in *** and Solanum lycopersicum plants,thereby inhibiting autophagy ***,we uncovered that the C2.mediated autophagy inhibition mechanism was conserved in three other *** summary,we discovered a novel counter-defensive strategy employed by geminiviruses that enlists their C2.proteins as disrupters of ATG7–ATG8 interactions to defeat antiviral autophagy.

关键词： autophagy C2 counterdefense geminivirus plant defense the ATG7–ATG8 interaction

Vision Sensing-Based Online Correction System for Robotic Weld Grinding

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Chinese Journal of Mechanical Engineering 2023年第5期36卷 97-108页

作者： Jimin ge Zhaohui Deng Shuixian Wang Zhongyang Li Wei Liu Jiaxu Nie Hunan Provincial Key Laboratory of High Efciency and Precision Machining of Difcult Machine Material Hunan University of Science and TechnologyXiangtan 411201China Institute of Manufacturing Engineering Huaqiao UniversityXiamen 361021China ZOOMLION Heavy Industry Science and Technology Co. Ltd.Changsha 410000China

The service cycle and dynamic performance of structural parts are afected by the weld grinding accuracy and surface consistency. Because of reasons such as assembly errors and thermal deformation, the actual track of the robot does not coincide with the theoretical track when the weld is ground ofine, resulting in poor workpiece surface quality. Considering these problems, in this study, a vision sensing-based online correction system for robotic weld grinding was developed. The system mainly included three subsystems: weld feature extraction, grinding, and robot real-time control. The grinding equipment was frst set as a substation for the robot using the WorkVisual software. The input/output (I/O) ports for communication between the robot and the grinding equipment were confgured via the I/O mapping function to enable the robot to control the grinding equipment (start, stop, and speed control). Subsequently, the Ethernet KRL software package was used to write the data interaction structure to realize realtime communication between the robot and the laser vision system. To correct the measurement error caused by the bending deformation of the workpiece, we established a surface profle model of the base material in the weld area using a polynomial ftting algorithm to compensate for the measurement data. The corrected extracted weld width and height errors were reduced by 2.01% and 9.3%, respectively. Online weld seam extraction and correction experiments verifed the efectiveness of the system’s correction function, and the system could control the grinding trajectory error within 0.2.mm. The reliability of the system was verifed through actual weld grinding experiments. The roughness, Ra, could reach 0.504 µm and the average residual height was within 0.2. mm. In this study, we developed a vision sensing-based online correction system for robotic weld grinding with a good correction efect and high robustness.

关键词： Online correction system Robot Grinding Weld seam Laser vision sensor

Titanium-rich TS-1 zeolite for highly efficient oxidative desulfurization

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Green Energy & Environment 2023年第1期8卷 163-172页

作者： Risheng Bai Yue Song ge Tian Fei Wang Avelino Corma Jihong Yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun130012China Instituto de Tecnología Química Universitat Politecnica de Valencia-Consejo Superior de Investigaciones CientíficasValencia46022Spain State Key Laboratory of Superhard Materials Jilin UniversityChangchun130012China International Center of Future Science Jilin UniversityChangchun130012China

The exploration of highly efficient catalysts based on nano-sized Ti-rich titanosilicate zeolites with controllable active titanium species is of great importance in zeolite catalytic ***,we reported an efficient and facile synthesis of nano-sized Ti-rich TS-1(MFI)zeolites by replacing tetrabutyl orthotitanate(TBOT)with tetrabutyl orthotitanate tetramer(TBOT-tetramer)as the titanium *** introduced TBOT-tetramer slowed down the zeolite crystallization process,and accordingly balanced the rate of incorporating Ti and the crystal growth and inhibited the massive formation of anatase ***,the prepared Ti-rich TS-1 zeolite sample had a Si/Ti as low as 2..6 in contrast to conventional one with a molar ratio of *** TBOT-tetramer endowed the titanosilicate zeolites with enriched active titanium species and enlarged external surface *** also impeded the formation of anatase species,resulting in superior catalytic behavior toward the oxidative desulfurization of dibenzothiophene compared with the conventional TS-1 zeolite counterpart prepared with TBOT.

关键词： TS-1 Zeolite Ti-rich Heterogeneous catalysis Oxidative desulfurization

Biosynthesis of phycocyanobilin in recombinant Escherichia coli

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Journal of Oceanology and Limnology 2020年第2期38卷 529-538页

作者： MA Chengbo LI Wenjun ge Baosheng LIN Jian QIN Song College of Life Sciences Yantai UniversityYantai 264005China Yantai Institute of Coastal Zone Research Chinese Academy of SciencesYantai 264003China Center for Bioengineering and Biotechnology China University of Petroleum(East China)Qingdao 266580China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

The recombinant expression of phycocyanobilin(PCB)was carried out in Escherichia coli,and the best fermentation conditions of recombinant *** biosynthesized PCB are optimized in the response surface methodology to improve PCB *** recombinant PCB is extracted,isolated,and purified by methanol and chloroform *** PCB is validated in UV-vis spectroscopy,high-pressure liquid chromatography,and mass *** addition,the anti-oxidant activities of the recombinant PCB are *** best induction conditions that optimized by Design Expert 8.0 software include:lactose concentration 4 mmol/L,induction temperature 2..69℃,induction time 4.6 h,and induction duration 13.57 h,under which the PCB expression level reached approximately 13 mg PCB/L,which is more than four times of previously reported 3 mg PCB/*** maximum absorption peak of the recombinant PCB is located at 680 nm with a high fluorescence intensity of 470 *** recombinant PCB has a good ability to scavenge 2.2.diphenyl-1-picrylhydrazyl(DPPH)free radicals.

关键词： combinational biosynthesis phycocyanobilin response surface methodology antioxidant

不同种源香椿无性系苗期表型性状变异及其与地理-气候因子的相关性

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植物资源与环境学报 2024年第5期33卷 13-21页

作者：余青富王正德葛婉婷王军辉麻文俊辛培尧西南林业大学国家林业和草原局西南风景园林工程技术研究中心云南昆明650224 西南林业大学西南地区生物多样性保育国家林业和草原局重点实验室云南昆明650224 中国林业科学研究院林业研究所林木遗传育种全国重点实验室北京100091 东北林业大学黑龙江哈尔滨150040

以香椿〔Toona sinensis(***.)Roem.〕12.种源142.无性系为研究对象,研究了不同种源香椿无性系苗期的表型性状变异,探究其表型性状间及表型性状与地理-气候因子间的相关性。结果表明:香椿无性系苗期表型性状在种源间和种源内差异极显... 详细信息

以香椿〔Toona sinensis(***.)Roem.〕12.种源142.无性系为研究对象,研究了不同种源香椿无性系苗期的表型性状变异,探究其表型性状间及表型性状与地理-气候因子间的相关性。结果表明:香椿无性系苗期表型性状在种源间和种源内差异极显著(P2.种源香椿无性系苗期表型性状的平均变异系数变幅为18.17%~2..34%,变异系数较大。聚类分析结果表明:在欧氏距离17处,供试的12.香椿种源被分成3类,3个类群之间具有明显的表型分化,但聚类结果与地理分布无明显相关性。相关性分析结果表明:香椿无性系苗期的树皮颜色与苗高、地径分别呈显著(P<0.05)和极显著负相关,与叶痕长和叶痕宽的相关性不显著;苗高与经度呈显著负相关,与海拔呈显著正相关;地径与平均气温日较差呈显著负相关,与等温性呈极显著负相关。综上所述,不同种源香椿无性系苗期表型性状变异丰富,表型性状变异主要来源于种源内,具有优良种质资源的选择潜力,且在所收集的种源范围内,苗高的地理变异模式以经度和海拔变异为主。

关键词：香椿表型性状表型变异地理-气候因子

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神经网络后门攻击与防御综述

计算机学报 2024年第8期47卷 1713-1743页

作者：汪旭童尹捷刘潮歌徐辰晨黄昊王志张方娇中国科学院信息工程研究所北京100085 中国科学院大学网络空间安全学院北京100049 中关村实验室北京100094 安徽师范大学计算机与信息学院安徽芜湖241003

当前,深度神经网络(Deep Neural Network,DNN)得到了迅速发展和广泛应用,由于其具有数据集庞大、模型架构复杂的特点,用户在训练模型的过程中通常需要依赖数据样本、预训练模型等第三方资源.然而,不可信的第三方资源为神经网络模型的安... 详细信息

当前,深度神经网络(Deep Neural Network,DNN)得到了迅速发展和广泛应用,由于其具有数据集庞大、模型架构复杂的特点,用户在训练模型的过程中通常需要依赖数据样本、预训练模型等第三方资源.然而,不可信的第三方资源为神经网络模型的安全带来了巨大的威胁,最典型的是神经网络后门攻击.攻击者通过修改数据集或模型的方式实现向模型中植入后门,该后门能够与样本中的触发器(一种特定的标记)和指定类别建立强连接关系,从而使得模型对带有触发器的样本预测为指定类别.为了更深入地了解神经网络后门攻击原理与防御方法,本文对神经网络后门攻击和防御进行了体系化的梳理和分析.首先,本文提出了神经网络后门攻击的四大要素,并建立了神经网络后门攻防模型,阐述了在训练神经网络的四个常规阶段里可能受到的后门攻击方式和防御方式;其次,从神经网络后门攻击和防御两个角度,分别基于攻防者能力,从攻防方式、关键技术、应用场景三个维度对现有研究进行归纳和比较,深度剖析了神经网络后门攻击产生的原因和危害、攻击的原理和手段以及防御的要点和方法;最后,进一步探讨了神经网络后门攻击所涉及的原理在未来研究上可能带来的积极作用.

关键词：深度神经网络触发器后门攻击后门防御攻防模型

Synergistic effects of CeO_(2./Cu_(2.O on CO catalytic oxidation:Electronic interaction and oxygen defect

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Journal of Rare Earths 2022年第8期40卷 1211-1218页

作者： Chengyan ge Jingfang Sun Qing Tong Weixin Zou Lulu Li Lin Dong School of Chemistry and Chemical Engineering Yancheng Institute of TechnologyYancheng 224051China Jiangsu Key Laboratory of Vehicle Emissions Control Center of Modern AnalysisSchool of the EnvironmentNanjing UniversityNanjing 210093China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

For CO catalytic oxidation,Cu and Ce species are of great importance,between which the synergistic effect is worth *** this work,CeO_(2./Cu_(2.O with Cu_(2.O{111}and{100}planes were comparatively explored on CO catalytic oxidation to reveal the effects of interfacial electronic interactions and oxygen *** activity result demonstrates that CeO_(2./o-Cu_(2.O{111}has superior performance compared with CeO_(2./c-Cu_(2.O{100}.Credit to the coordination unsaturated copper atoms(Cu_(CUS))on oCu_(2.O{111}surface,the interfacial electronic interactions on CeO_(2./o-Cu_(2.O{111}are more obvious than those on CeO_(2./c-Cu_(2.O{100},leading to richer oxygen defect generation,better redox and activation abilities of CO and O_(2.***,the reaction mechanism of CeO_(2./o-Cu_(2.O{111}on CO oxidation is revealed,i.e.,CO and O_(2.are adsorbed on the Cucus on Cu_(2.O{111}and oxygen defect of CeO_(2.,respectively,and then synergistically promote the CO oxidation to CO_(2..The work sheds light on the designing optimized ceria and copper-based catalysts and the mechanism of CO oxidation.

关键词： CeO_(2./Cu_(2.O{111}{100} Synergistic effect Interfacial electronic interaction Oxygen defect CO oxidation Rare earths