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Mechanistic insight into the synergy between nickel single atoms and nanoparticles on N-doped carbon for electroreduction of CO2

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Journal of Energy Chemistry 2025年第01期 327-336页

作者： Mingdong Sun Wenwen Guan cailing chen Chao Wu Xiaoling Liu Biao Meng Tao chen Yu Han Jun Wang Shibo Xi Yu Zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Institute of Sustainability for Chemicals Energy and Environment A*STAR (Agency for Science Technology and Research) College of Materials Science and Engineering Sichuan University

The synergy of single atoms （SAs） and nanoparticles （NPs） has demonstrated great potential in promoting the electrocatalytic carbon dioxide reduction reaction （CO2RR）;however,the rationalization of the SAs/NPs proportion remains one challenge for the catalyst ***,a Ni2+-loaded porous poly（ionic liquids）(PIL) precursor synthesized through the free radical self-polymerization of the ionic liquid monomer,1-allyl-3-vinylimidazolium chloride,was pyrolyzed to prepare the Ni,N co-doped carbon materials,in which the proportion of Ni SAs and NPs could be facilely modulated by controlling the annealing *** catalyst Ni-NC-1000 with a moderate proportion of Ni SAs and NPs exhibited high efficiency in the electrocatalytic conversion of CO2into *** Ni K-edge X-ray absorption near-edge structure （XANES） spectra and theoretical calculations were conducted to gain insight into the synergy of Ni SAs and *** charge transfer from Ni NPs to the surrounding carbon layer and then to the Ni SAs resulted in the electron-enriched Ni SAs active *** the electroreduction of CO2,the coexistence of Ni SAs and NPs strengthened the CO2activation and the affinity towards the key intermediate of*COOH,lowering the free energy for the potential-determining*CO2→*COOH step,and therefore promoted the catalysis efficiency.

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Staphylococcus epidermidis meningitis in combination with acute disseminated encephalomyelitis A case report

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Neural Regeneration Research 2009年第11期4卷 843-845页

作者： Xin chen Haijin chen Zhiqin Liu cailing chen Fenping Luo Zhichun Feng Department of Pediatrics Bayi Children's Hospital Affiliated to Beijing Military Region General Hospital Beijing 100710 China Department of Nuclear Medicine Beijing Military Region General Hospital Beijing 100710 China

A nine-year-old girl with Staphylococcus epidermidis meningitis combined with acute disseminated encephalomyelitis （ADEM） was enrolled in the present study, and exhibited sustained fever and headache for 5 days and a single seizure episode. Meningeal irritation and disturbance of consciousness were apparent. Cerebrospinal fluid examination revealed increased protein level and pleocytosis. Cerebrospinal fluid culture demonstrated Staphylococcus epidermidis growth. The patient was treated with intravenous cefotaxime, intravenous dexamethasone, and decreasing intracranial pressure for 3 weeks. Seizures and fever symptoms improved, but disturbance of consciousness, muscle weakness, and bilateral limb paresis were significant. IgG index was elevated and oligoclonal bands were positive in the cerebrospinal fluid. Magnetic resonance imaging demonstrated high T2-weighted signals in subcortical white matter, which were consistent with ADEM. High-dose methylprednisolone for 3 days and a 6-day pulse therapy with immunoglobulins resulted in improved clinical symptoms and cerebrospinal fluid examination. The patient＇s temperature dropped to normal, and the headache disappeared. A Staphylococcus epidermidis infection associated with ADEM is uncommon in children. Results suggested that Staphylococcus epidermidis infection could be a pathogenic factor for ADEM, and ADEM is a complication of Staphylococcus epidermidis meningitis.

关键词： acute disseminated encephalomyelitis Staphylococcus epidermidis infection children

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Topological Disk Mesh Morphing Based on Area-Preserving Parameterization

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Wuhan University Journal of Natural Sciences 2018年第3期23卷 201-209页

作者： chen cailing SU Kehua ZHU Xinyan School of Computer Wuhan University Wuhan 430072Hubei China State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan UniversityWuhan 430072 Hubei China

Mesh morphing is a technique which gradually deforms a mesh into another one. Mesh parameterization, a powerful tool adopted to establish the one-to-one correspondence map between different meshes, is of great importance in 3 D mesh morphing. However, current parameterization methods used in mesh morphing induce large area distortion, resulting in geometric information loss. In this paper, we propose a new morphing approach for topological disk meshes based on area-preserving parameterization. Conformal mapping and M？bius transformation are computed firstly as rough alignment. Then area preserving parameterization is computed via the discrete optimal mass transport map. Features are exactly aligned through radial basis functions. A surface remeshing scheme via Delaunay refinement algorithm is developed to create a new mesh connectivity. Experimental results demonstrate that the proposed method performs well and generates high-quality morphs.

关键词： mesh morphing area preserving parameterization M?bius transformation radial basis functions

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Effect of nanofillers with different energy levels on the electrical properties of epoxy‐based nanocomposites

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High Voltage 2024年第4期9卷 948-956页

作者： Ning Guo cailing chen Guangwei Zhang Rongsheng Sun Yulong Wang Junguo Gao Key Laboratory of Engineering Dielectrics and Its Application Ministry of EducationHarbin University of Science and TechnologyHarbinChina

The authors investigate the effects of nanofillers with varying band‐gap energies on the space charge properties,breakdown field strength,and bulk resistivity of epoxy(EP)‐based ***,the molecular orbital distribution of both the epoxy resin and nanofillers were examined through density functional *** results indicate that the space charge accumulation within silicon dioxide/EP and germanium oxide/EP is reduced,leading to a more uniformly distributed electric field intensity within the specimen when compared to *** a result,both materials exhibit improved AC breakdown field strength and volume ***,the amount of charge accumulated within tin dioxide/EP is higher,resulting in lower breakdown field strength than *** lowest unoccupied molecular orbital and the highest occupied molecular orbital energy level differences between epoxy and nanofillers introduce electron traps and hole traps at the interface,forming interfacial traps that affect the space charge distribution within the specimen,as well as the trap energy levels within the *** the experimental results,shallow traps promote space charge accumulation and reduce the breakdown field strength,while deep traps have the opposite effect.

关键词： energy resistivity occupied

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Microwave Assisted Hydrothermal Way Towards Highly Crystalized N-Doped Carbon Quantum Dots and Their Oxygen Reduction Performance

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Chemical Research in Chinese Universities 2019年第2期35卷 171-178页

作者： HUANG He LIANG chen SHA Haoyan YU Ying LOU Yue chen cailing LI Chunguang chen Xiaobo SHI Zhan FENG Shouhua State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012P.R.China School of Engineering EMIT UniversityCarltonVIC 3053Australia Department of Chemical Engineering University of CaliforniaDavisCA 95616USA

We proposed a green microwave-assisted hydrothermal way to synthesize highly crystalized N-doped carbon quantum dots(N-CQDs).The N-CQDs obtained by this microwave method have good crystalline degree(ID/IG=0.6)and a high molar ratio of N/C(11.1%)comparing with those obtained from traditional top-down *** experimental results show that glycerine plays a key role ill the fonnation of highly crystalized *** as-prepared N-CQDs have good luminescent property and may be utilized as fluorescent probe to detect ions or mark *** the majority of N atoms in the N-CQDs were pyridinic type(64.8%),the as-prepared N-CQDs were used as a catalyst for the oxygen reduction reaction(ORR)electrocatalysis in the anode of the fuel cell(the onset potential is-0.121V),which was a 4e-transfer procedure and the catalyst showed good stability after 100 cycles.

关键词： Carbon-dot Nitrogen-dopping Highly-crystalized Oxygen reduction reaction(ORR)

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Synergistic roles of platinum nanoparticles and sodium ions within beta zeolites in N-alkylation of amines with aromatic alcohols

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Science China Chemistry 2023年第9期66卷 2690-2699页

作者： Yue Wu Shibo Xi cailing chen Qizhi Hu Zhuo Xiong Jianyue Wang Yihu Dai Yu Han Shi Jiang Jun Wang Yu Zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Institute of Sustainability for Chemicals Energy and EnvironmentA*STAR(Agency for ScienceTechnology and Research)Singapore 627833Singapore Advanced Membranes and Porous Materials Center Physical Sciences and Engineering DivisionKing Abdullah University of Science and TechnologyThuwal 23955-6900Saudi Arabia Institute of Advanced Synthesis School of Chemistry and Molecular EngineeringNanjing Tech UniversityNanjing 211816China

N-alkylation of amines with alcohols is a promising green route for the synthesis of N-alkylamines, but the designation of highly active and stable heterogeneous catalysts remains one challenge. In this work, we initiated the application of zeolite-encapsulated noble metal nanoparticles(NPs) in the N-alkylation of amines with aromatic alcohols. Platinum(Pt) NPs were directly confined into the framework of BEA zeolite with tunable Si/Al molar ratios and Na^(+) contents. The champion catalyst afforded the extremely high turnover number(TON) of 6,176 and turnover frequency(TOF) of 3,390 h^(-1) plus stable recyclability and broad substrate compatibility. The Na ions modulated the electronic state of Pt NPs to reach a moderate Pt–H strength, which wellbalanced the two crucial steps of dehydrogenation and H-transfer and accounted for the high catalytic performance. The encapsulation of zeolites provided spatial satisfaction for the synergy effect above and enhanced the stabilization of Pt NPs.

关键词： heterogeneous catalysis zeolite amines N-alkylation nano catalysts

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Optical Extinctions of Inter-Arm Molecular Clouds in M31:A Pilot Study for the Upcoming CSST Observations

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Research in Astronomy and Astrophysics 2024年第6期24卷 323-333页

作者： cailing chen Zheng Zheng Chao-Wei Tsai Sihan Jiao Jing Tang Jingwen Wu Di Li Yun Zheng Linjing Feng Yujiao Yang Yuan Liang National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Radio Astronomy and Technology Chinese Academy of SciencesBeijing 100101China Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China Zhejiang Lab Hangzhou 311121China

Recent submillimeter dust thermal emission observations have unveiled a significant number of inter-arm massive molecular clouds in ***,the effectiveness of this technique is limited to its sensitivity,making it challenging to study more distant *** study introduces an alternative approach,utilizing optical extinctions derived from space-based telescopes,with a focus on the forthcoming China Space Station Telescope(CSST).We first demonstrate the capability of this method by constructing dust extinction maps for 17 inter-arm massive molecular clouds in M31 using the Panchromatic Hubble Andromeda Treasury *** analysis reveals that inter-arm massive molecular clouds with an optical extinction(A_(V)) greater than 1.6 mag exhibit a notable A_(V) excess,facilitating their *** majority of these inter-arm massive molecular clouds show an A_(V) around 1 mag,aligning with measurements from our JCMT *** validation using a mock CSST RGB star catalog confirms the method's *** show that the derived A_(V)values using CSST z and y photometries align more closely with the input *** clouds with A_(V)> 1.6 mag can also be identified using the CSST mock *** thus claim that future CSST observation clouds provide an effective way for the detection of inter-arm massive molecular clouds with significant optical extinction in nearby galaxies.

关键词： infrared:stars ISM:clouds Galaxy:structure

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Air-Resistant Lead Halide Perovskite Nanocrystals Embedded into Polyimide of Intrinsic Microporosity

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Energy Material Advances 2021年第1期2021卷 120-128页

作者： Haoze Yang Luis Gutiérrez-Arzaluz Partha Maity Mahmoud AAbdulhamid Jun Yin Yang Zhou cailing chen Yu Han Gyorgy Szekely Osman M.Bakr Omar F.Mohammed Advanced Membranes and Porous Materials Center(AMPMC)&KAUST Catalysis Center(KCC) Division of Physical Science and Engineering(PSE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia Advanced Membranes and Porous Materials Center(AMPMC) Division of Physical Science and Engineering(PSE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia KAUST Catalysis Center(KCC) Division of Physical Science and Engineering(PSE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

Although cesium lead halide perovskite(CsPbX3,X=Cl,Br,or I)nanocrystals(PNCs)have been rapidly developed for multiple optoelectronic applications due to their outstanding optical and transport properties,their device fabrication and commercialization have been limited by their low structural stability,especially under environmental *** this work,a new approach has been developed to protect the surface of these nanocrystals,which results in enhanced chemical stability and optical *** method is based on the encapsulation of CsPbX3 NCs into a polyimide with intrinsic microporosity(PIM-PI),4,4′-(hexafluoroisopropylidene)diphthalic anhydride reacted with 2,4,6-trimethyl-m-phenylenediamine(6FDATrMPD).The presence of 6FDA-TrMPD as a protective layer can efficiently isolate NCs from an air environment and subsequently enhance their optical and photoluminescence *** specifically,comparing NCs treated with a polymer to as-synthesized nanocrystals after 168 h,we observe that the PL intensity decreased by 70%and 20%for the NCs before and after polymer *** addition,the PNC film with a polymer shows a much longer excited-state lifetime than the as-synthesized nanocrystals,indicating that the surface trap states are significantly reduced in the treated *** enhancement in chemical and air stability,as well as optical behavior,will further improve the performance of CsPbBr3 PNCs yielding promising optical devices and paving the way for their production and implementation at a large scale.

关键词： stability porosity yielding

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基于ZIFs合成的中空双金属(Zn,Co)S纳米晶及其赝电容性质研究

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高等学校化学学报 2017年第8期38卷 1303-1308页

作者：成巍陈彩玲于影李春光高路施展吉林大学无机合成与制备化学国家重点实验室化学学院长春130012

通过两步法设计合成了具有中空结构的双金属硫化物(Zn,Co)S纳米晶,并研究了其电化学性质.首先在室温下,以水为溶剂,十六烷基三甲基溴化铵为表面活性剂,利用Zn^(2+),Co^(2+)与2-甲基咪唑的配位作用形成了ZIF-Zn,Co.然后以ZIF-Zn,Co为自... 详细信息

通过两步法设计合成了具有中空结构的双金属硫化物(Zn,Co)S纳米晶,并研究了其电化学性质.首先在室温下,以水为溶剂,十六烷基三甲基溴化铵为表面活性剂,利用Zn^(2+),Co^(2+)与2-甲基咪唑的配位作用形成了ZIF-Zn,Co.然后以ZIF-Zn,Co为自牺牲模板剂,加入硫代乙酰胺,在微波辐射下快速合成了具有中空结构的(Zn,Co)S纳米晶.电化学测试结果表明,在电流密度为3 mA/cm^2时,(Zn,Co)S纳米晶比电容为423.3 F/g,在电流密度为10 mA/cm^2时,充放电2000次,仍能保持59%的初始电容.所制备的中空纳米结构具有较高的比表面积和较好的电化学性能,可作为超级电容器的电极材料.

关键词：沸石咪唑酯骨架材料双金属空心纳米结构硫化物超级电容器

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绿色荧光蛋白标记植物乳杆菌及其生物学特性分析

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食品与发酵工业 2019年第20期45卷 22-28,34页

作者：陈彩玲毛丙永崔树茂赵建新江南大学食品学院

为探究绿色荧光蛋白(green fluorescent protein,GFP)标记对植物乳杆菌生物学特性的影响,采用GFP对4株植物乳杆菌进行标记,并比较标记前后菌株的生物学特性。结果显示,标记前后菌株生长情况基本相同,其中P2和P4被GFP标记后生长略有滞后... 详细信息

为探究绿色荧光蛋白(green fluorescent protein,GFP)标记对植物乳杆菌生物学特性的影响,采用GFP对4株植物乳杆菌进行标记,并比较标记前后菌株的生物学特性。结果显示,标记前后菌株生长情况基本相同,其中P2和P4被GFP标记后生长略有滞后;标记前后的菌株对胃酸和胆盐的耐受趋势基本一致,无显著差别;在-80℃冻存2周内,标记前后所有菌株的活菌数无显著变化;对低聚果糖利用能力无变化;标记后所有菌株对氯霉素有抗性,标记前菌株对氯霉素敏感,对其他13种抗生素的敏感性无变化。说明GFP标记不影响植物乳杆菌的生物学特性,为可视化研究植物乳杆菌在小鼠肠道内的定植和分布提供了理论依据。

关键词：植物乳杆菌绿色荧光蛋白重组菌株生物学特性

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