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Fabrication of rod-shaped β-FeOOH: the roles of polyethylene glycol and chlorine anion

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Science China Chemistry 2016年第7期59卷 895-902页

作者： Xuejiao Wei xiaoling mou Yan Zhou Yong Li Wenjie Shen State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

β-FeOOH nanorods of 40 nm wide and 450 nm long were fabricated through precisely regulating the hydrolysis kinetics of Fe3＋ in polyethylene glycol and the concentration of C1- as the structure-directing agent. Detailed structural and chemical analyses of the intermediates during the synthesis identified that the strong interaction between PEG and Fe3＋ modulated the hydrolysis kinetics of Fe3＋and prevented the aggregation of β-FeOOH nanorods; while C1- provided sufficient nucleation sites, stabilized the hollow channel of β-FeOOH, and more importantly induced the growth of the nanorods along [001] direction.

关键词： β-FeOOH nanorods hydrolysis kinetics capping agent anisotropic growth

Interface-directed epitaxially growing nickle ensembles as efficient catalysts in dry reforming of methane

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Journal of Energy Chemistry 2022年第3期31卷 502-513,I0014页

作者： Ping Wang Song Wei Shiyi Wang Ronghe Lin xiaoling mou Yunjie Ding Hangzhou Institute of Advanced Studies Zhejiang Normal UniversityHangzhou 311231ZhejiangChina School of Chemical Engineering and Light Industry Guangdong University of Technology.Guangzhou 510006GuangdongChina Analysis and Test Center Guangdong University of TechnologyGuangzhou 510006GuangdongChina Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina The State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Supported nickel catalysts are promising candidates for dry reforming of methane, but agglomeration of Ni^(0) and coke deposition hinder the industrial applications. Herein, we report a novel interface-directed synthetic approach to construct distinct metal ensembles by carefully tuning the compositions of the carriers. A Zr-Mn-Zn ternary oxide-supported Ni catalyst, together with the respective binary oxide-supported analogues, was synthesized by adopting a sequential co-precipitation and wetness impregnation method. Combined characterization techniques identify distinct catalyst models, including (i) conventional NiO nanoparticles with different sizes on Zr-Mn and Zr-Zn, and (ii) epitaxially growing NiO ensembles of a few nanometers thickness at the periphery of ZnO_(x) particles. These catalysts exhibit divergent responses in the catalytic testing, with the ternary oxide system significantly outperforming the binary analogues. The strong electronic interactions between Mn-Ni increase Ni dispersion and the activity while the stability is strengthened upon Zn addition. Both high activity, high selectivity, and remarkable stability are attained upon co-adding Mn and Zn. The interfaces between Ni and Zr-Mn-Zn rather than the physical contacts of individual oxide-supported analogues through mechanical mixing are keys for the outstanding performance.

关键词： Methane dry reforming Nickel Interface Epitaxial growth Structure-performance relationship

Selective hydrogenation of 1,3-butadiene on iridium nanostructures:Structure sensitivity, host effect, and deactivation mechanism

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Journal of Energy Chemistry 2022年第6期31卷 541-554,I0015页

作者： Mengru Wang Yuxue Yue Yi Wang xiaoling mou Renqin Chang Zupeng Chen Ronghe Lin Jia Zhao Yunjie Ding Hangzhou Institute of Advanced Studies Zhejiang Normal UniversityHangzhou 311231ZhejiangChina Institute of Industrial Catalysis Zhejiang University of TechnologyHangzhou 310014ZhejiangChina International Innovation Center for Forest Chemicals and Materials College of Chemical EngineeringNanjing Forestry UniversityNanjing 210037JiangsuChina Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina The State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of Sciences 457Dalian 116023LiaoningChina

A systematic study on the structure sensitivity,host effect,and the deactivation mechanism of Ircatalyzed selective hydrogenation of 1,3-butadiene,a key process in the purification of alkadiene for the upgrading of C4 cut,is presented by coupling steady-state catalytic testing,in-depth characterization,kinetic evaluation,and density functional theory *** reveal that:(i) 1,3-Butadiene hydrogenation on iridium is structure-sensitive with the optimal particle size of about 2 nm,and the H_(2) dissociation energy is a reliable activity descriptor;(ii) The nature of the NC hosts exerts a critical impact on the catalytic performance,and balanced nitrogen content and speciation seem key for the optimized performance;and (iii) Different deactivation mechanisms occur:fouling by coke deposition on the catalysts with a high N:C ratio (>1),and site blockage due to the competitive adsorption between 1-butene/cis-2-butene and 1,*** molecular insights provide valuable guidelines for the catalyst design in selective hydrogenations.

关键词： 1 3-Butadiene Deactivation Hydrogenation Iridium Nitrogen-doped carbon Structure sensitivity

Assembly of N-and P-functionalized carbon nanostructures derived from precursor-defined ternary copolymers for high-capacity lithiumion batteries

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Chinese Journal of Chemical Engineering 2023年第1期53卷 280-288页

作者： Luyao Guo Mengru Wang Ronghe Lin Jiaxin Ma Shuanghao Zheng xiaoling mou Jun Zhang Zhong-Shuai Wu Yunjie Ding Hangzhou Institute of Advanced Studies Zhejiang Normal UniversityHangzhou 311231China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Yuquan Road 19AShijingshan DistrictBeijing 100049China College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesZhongshan Road 457Dalian 116023China

Synthesis of new carbon nanostructures with tunable properties is vital for precisely regulating electrochemical performance in the wide ***,we report a novel approach for the oxidative polymerization of N-and P-bearing copolymers from the self-assembly of three different monomers(aniline,pyrrole,and phytic acid),and further prepare the respective carbon nanostructures with relatively consistent N dopant(6.2%–8.0%,atom)and varying P concentrations(0.4%–2.8%,atom)via controllable *** impacts of phytic acid addition on the compositional,structural,and morphological evolution of the copolymers and the resulting nanocarbons are well studied through a spectrum of characterizations including N2 sorption,Fourier transform infrared spectroscopy,gel permeation chromatograph,scanning/transmission electron microscopy,and X-ray photoelectron *** fragmentation of the nanosphere structures is evidenced with increasing addition of phytic acid,leading to different nanostructures from hollow nanospheres to 3D *** decorated with N and P dopants from pyrolysis are further utilized as anode materials in lithium-ion batteries,demonstrating enhanced electrochemical performance,i.e.,a reversible capacity of 380 mAhg^(-1)at 2 Ag^(-1)for NPC-0.5 during 200 *** superior performance originates from the balanced porosity,and appropriate concentrations of P and pyrrolic N,thus pointing the direction for designing high-performance anode materials.

关键词： Carbon nanospheres Doping Lithium-ion batteries Polymers Porosity

Design strategies and structure‐performance relationships of heterogeneous catalysts for selective hydrogenation of 1,3‐butadiene

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Chinese Journal of Catalysis 2022年第4期43卷 1017-1041页

作者： Mengru Wang Yi Wang xiaoling mou Ronghe Lin Yunjie Ding Hangzhou Institute of Advanced Studies Zhejiang Normal UniversityHangzhou 311231ZhejiangChina State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of Sciences116023 DalianLiaoningChina

Selective hydrogenation of 1,3‐butadiene is an essential process in the upgrading of the crude C4 cut from the petroleum chemical *** design is crucial to achieve a virtually alkadiene‐free product while avoiding over‐hydrogenating valuable *** addition to the great industrial relevance,this demanding selectivity pattern renders 1,3‐butadiene hydrogenation a widely used model reaction to discriminate selective hydrogenation catalysts in ***,critical reviews on the catalyst development are extremely lacking in *** this review,we aim to provide the reader an in‐depth overview of different catalyst families,particularly the precious metal‐based monometallic catalysts(Pd,Pt,and Au),developed in the last half *** emphasis is placed on the development of new strategies to design high‐performance architectures,the establishment of structure‐performance relationships,and the reaction and deactivation *** directions for future optimization of catalyst formulations and engineering aspect are also provided.

关键词： 1,3‐Butadiene Catalyst design Selective hydrogenation Structure‐performance relationship Reaction and deactivation mechanism

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光纤通信网络中节点故障定位方法研究

激光杂志 2023年第2期44卷 143-148页

作者：牟小令西昌学院信息技术学院四川西昌615000

节点故障定位能够有效保证光纤通信网络,确保网络运行质量。针对故障定位不准确的问题,研究了一种新的光纤通信网络中节点故障定位方法。采取分布式故障数值处理方式,执行故障特征值标记代码指令,将代码指令发送至不同的数据节点中,在... 详细信息

节点故障定位能够有效保证光纤通信网络,确保网络运行质量。针对故障定位不准确的问题,研究了一种新的光纤通信网络中节点故障定位方法。采取分布式故障数值处理方式,执行故障特征值标记代码指令,将代码指令发送至不同的数据节点中,在发送的同时构建指令存储区域,实现分布式处理操作,并将执行后的指令结果返回至中心处理客户端,进而避免因光线通信网络外部数据的干扰影响特征值数据的提取结果。根据获取的光纤通信网络节点故障特征值判断故障位置,并进行相应的故障定位处理,通过数据收集、故障预警数据相关处理、预警数据过滤、节点故障定位、无效定位数据传输管理实现故障定位。实验结果表明,研究的光纤通信网络中节点故障定位方法具有较高定位精准度,在信噪比为-8 dB时,其定位精准度达到98%,优于对比方法,且在定位过程中不会影响光纤通信网络的正常通信速度,有效保证网络的安全性能。

关键词：光纤通信通信网络节点故障故障定位定位方法

M/C_(3)N_(4)/AC(M=Au,Pt,Ru)‐catalyzed acetylene coupling with ethylene dichloride:How effective are the bifunctionalities?

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Chinese Journal of Catalysis 2022年第3期43卷 820-831页

作者： Qing Yu Shiyi Wang Mengru Wang xiaoling mou Ronghe Lin Yunjie Ding Hangzhou Institute of Advanced studies Zhejiang Normal UniversityHangzhou 311231ZhejiangChina Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina The State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Acetylene coupling with ethylene dichloride,which uses both coal and oil resources,is attractive for sustainable PVC ***,highly active and stable carbon nitride‐based catalysts were developed by a novel pre‐oxidation‐pyrolysis process,affording unprecedented dehydrochlorination activity with good *** best‐performing system was further modified with different precious metals(Au,Pt,and Ru)to promote the hydrochlorination chemistry between the in‐situ formed hydrogen chloride and acetylene co‐*** presence of metal centers intensifies the hydrochlorination activity but weakens the dehydrochlorination ability due to competitive adsorption between the two reactants at the metal *** coupling performance was achieved over C_(3)N_(4)/AC and single‐atom Au/C_(3)N_(4)/AC catalysts in cascade *** results strongly suggest that dehydrochlorination is an essential step in the coupling reaction,and the activation of acetylene and ethylene dichloride molecules requires different active sites that should be engineered in future work.

关键词： Acetylene hydrochlorination Bi‐functional catalyst Dehydrochlorination Ethylene dichloride Vinyl chloride

远程教育中交互研究的热点、前沿与趋势——基于CitespaceV的可视化分析

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信息与电脑 2019年第17期31卷 242-244页

作者：牟晓玲云南师范大学信息学院

远程教育从产生以来,由于教与学、师生之间时空分离的本质,关于远程教育交互的研究一直是国内外学者研究的重点。为把握我国远程教育交互研究的热点及趋势,笔者以CNKI数据库文献为数据源,利用CitespaceV信息可视化分析软件,对我国远程... 详细信息

远程教育从产生以来,由于教与学、师生之间时空分离的本质,关于远程教育交互的研究一直是国内外学者研究的重点。为把握我国远程教育交互研究的热点及趋势,笔者以CNKI数据库文献为数据源,利用CitespaceV信息可视化分析软件,对我国远程教育中关于交互的相关研究进行基于知识图谱的可视化分析,通过对关键词的词频分析,揭示远程教育交互研究的热点,并使用主题词凸显,概括远程教育交互研究前沿。

关键词：远程教育交互可视化热点前沿

脂联素通过p38MAPK信号通路影响URSA患者外周血AdipoR1和免疫细胞平衡

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免疫学杂志 2018年第5期34卷 436-442页

作者：李维宏牟晓玲漆洪波重庆医科大学附属第一医院妇产科 400016

目的探讨脂联素对不明原因复发性流产(URSA)患者外周血调节性T细胞(Treg)/Th17平衡调节、Adipo R和p38MAPK信号通路的影响。方法以URSA患者为研究对象,正常妊娠女性、健康未孕女性为对照,分离外周血单个核细胞(PBMC),RT-PCR检测Adipo R1... 详细信息

目的探讨脂联素对不明原因复发性流产(URSA)患者外周血调节性T细胞(Treg)/Th17平衡调节、Adipo R和p38MAPK信号通路的影响。方法以URSA患者为研究对象,正常妊娠女性、健康未孕女性为对照,分离外周血单个核细胞(PBMC),RT-PCR检测Adipo R1/R2表达;脂联素体外干预后,ELISA法检测IL-17和TGF-β分泌水平,RT-PCR检测Adipo R1、Fox P3和RORγt m RNA表达,Western blot检测p38MAPK和p-p38MAPK表达;加入脂联素前先加入p38MAPK抑制剂SB203580,观察SB203580对Fox P3、RORγt、Adipo R1 m RNA表达水平的影响。结果 URSA患者Adipo R1显著降低;脂联素体外处理可升高URSA患者TGF-β分泌水平,降低IL-17水平,上调URSA患者Fox P3和Adipo R1 m RNA表达水平,降低RORγt表达水平,并呈明显的时间依赖性;脂联素可升高URSA患者p38MAPK激酶和p-p38MAPK激酶蛋白表达;p38MAPK抑制剂SB203580单独处理对Fox P3、RORγt和Adipo R1 m RNA表达无明显影响,但能明显抑制脂联素上调Fox P3和Adipo R1 m RNA和下调RORγt m RNA表达的作用。结论脂联素可能通过Adipo R1激活URSA患者体内p38MAPK信号通路改善Treg/Th17平衡而保护妊娠。

关键词：脂联素不明原因复发性流产 Th17 调节性T细胞 p38MAPK