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Strengthening absorption ability of Co-N-C as efficient bifunctional oxygen catalyst by modulating the d band center using MoC

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Green Energy & Environment 2023年第2期8卷 459-469页

作者： Jianwen liu Ying Guo Xian-Zhu fu jing-Li Luo Chunyi Zhi Shenzhen Key Laboratory of Polymer Science and Technology Guangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen University518060China Department of Materials Science and Engineering City University of Hong Kong83 Tat Chee AvenueKowloon TongHong KongChina Department of Chemical and Materials Engineering University of AlbertaEdmontonAlbertaT6G 1H9Canada

Co-N-C is a promising oxygen electrochemical catalyst due to its high stability and good ***,due to the limited adsorption ability improvement for oxygen-containing intermediates,it usually exhibits inadequate catalytic activity with 2-electron pathway and high selectivity of hydrogen ***,the adsorption of Co-N-C to these intermediates is modulated by constructing heterostructures using transition metals and their derivatives based on d-band *** heterostructured nanobelts with MoC core and pomegranate-like carbon shell consisting of Co nanoparticles and N dopant(MoC/Co-N-C)are engineered to successfully modulate the d band center of active Co-N-C sites,resulting in a remarkably enhanced electrocatalysis *** optimally performing MoC/Co-N-C exhibits outstanding bi-catalytic activity and stability for the oxygen electrochemistry,featuring a high wave-half potential of 0.865 V for the oxygen reduction reaction(ORR)and low overpotential of 370 mV for the oxygen evolution reaction(OER)at 10 mA cm^(-2).The zinc air batteries with the MoC/Co-N-C catalyst demonstrate a large power density of 180 mW cm^(-2)and a long cycling lifespan(2000 cycles).The density functional theory calculations with Hubbard correction(DFT+U)reveal the electron transferring from Co to Mo atoms that effectively modulate the d band center of the active Co sites and achieve optimum adsorption ability with"single site double adsorption"mode.

关键词： Bifunctional oxygen catalysts Pomegranate-like shell D band theory Enhanced synergistic effect Rechargeable zinc air battery

Mesoporous polymers:soft-template self-assembly synthesis and applications

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Science China Chemistry 2024年第5期67卷 1442-1464页

作者： Facai Wei Tingting Zhang Jianwei fu Chengbin jing Jiangong Cheng Shaohua liu State Key Laboratory of Precision Spectroscopy Engineering Research Center of Nanophotonics&Advanced Instrument(Ministry of Education)School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450052China State Key Lab of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China

Mesoporous polymers combine the advantages of polymer materials(abundant polar functional groups,lightweight,flexibility,and processability)and mesoporous structures(high specific surface area,adjustable pore structure,and large pore volume);hence,they have great application potential in sensing,adsorption,catalysis,energy storage,biomedicine,***,developing advanced synthetic strategies for mesoporous polymers and investigating their intrinsic applications have become hot research ***-template-based self-assembly is regarded as a promising approach for synthesizing mesoporous *** work reviews recent progress in the synthetic strategy for producing various mesoporous polymers using soft-template selfassembly,focusing on the synthesis of conductive polymers,phenol-based polymers,and resin-based polymers and their potential ***,perspectives on future applications of mesoporous polymers,along with a few challenges that need to be resolved,are also discussed in this review.

关键词： mesoporous polymer porous material self-assembly soft templates interface synthesis

东江河口典型河段溶解氧时空动态及低氧成因解析

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湖泊科学 2025年第1期37卷 112-121页

作者：黄广灵黄本胜刘达邱静黄国如华南理工大学土木与交通学院广州510640 广东省水利水电科学研究院广州510635 广东省流域水环境治理与水生态修复重点实验室广州510635 华南理工大学亚热带建筑与城市科学全国重点实验室广州510640

为解析东江南支流低氧现象的成因,并为水环境治理提供科学依据,本研究分别于2019年春季和夏季对该河流的主要断面进行了水质监测。监测结果显示,东江南支流的溶解氧(DO)水平从中游道滘镇的6.93 mg/L降至出海口处的4.08 mg/L。DO与影响... 详细信息

为解析东江南支流低氧现象的成因,并为水环境治理提供科学依据,本研究分别于2019年春季和夏季对该河流的主要断面进行了水质监测。监测结果显示,东江南支流的溶解氧(DO)水平从中游道滘镇的6.93 mg/L降至出海口处的4.08 mg/L。DO与影响因子的相关性分析显示,DO与水温呈显著负相关,与盐度呈正相关,而与氨氮和总磷等营养物质呈显著负相关。这些营养物质的增加与DO的降低在空间上呈显著重叠,特别是在夏季。研究结果表明,东江南支流低氧现象受物理、化学和生物因素的共同影响,其中温度升高和营养物质浓度增加使得中下游水体的氧气消耗加快,河道汇流处的断面缩窄和下游水体的透光性差引起DO补给不足,从而导致下游沙田泗盛断面经常性出现氧亏(低氧)现象。

关键词：东江南支流溶解氧低氧营养物珠江

A Numerical Study on Pressure Drop in Microchannel Flow with Different Bionic Micro-Grooved Surfaces

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Journal of Bionic Engineering 2012年第1期9卷 99-109页

作者： jing Cui Yabo fu School of Airport Civil Aviation University of China Tianjin 30300 P. R. China College of Physics and electronic engineering Taizhou University Taizhou 318000 P. R. China

The studies of bionics reveal that some aquatic animals and winged insects have developed an unsmoothed surface possessing good characteristics of drag reduction. In this paper, four types of bionic surfaces, placoid-shaped, V-shaped, rib- let-shaped, and ridge-shaped grooved surfaces, are employed as the microchannel surfaces for the purpose of reducing pressure loss. Lattice Boltzmann Method （LBM）, a new numerical approach on mescoscopic level, is used to conduct the numerical investigationsr. The results show that the micro-grooved surfaces possess the drag reduction performance. The existence of the vortices formed within the grooves not only decrease the shear force between fluid and wall but also minimize the contact area between fluid and walls, which can lead to a reduction of pressure loss. The drag reduction coefficient （η） for these four types of micro-structures could be generalized as follows： ηridge_shaped 〉 ηv-shaped 〉 ηplacoid-shaped 〉 ηriblet-shaped. Besides, the geometrical optimizations for the ridge-shaped grooves, which have the highest drag reduction performance, are performed as well. The results suggest that, for the purpose of drag reduction, the ridge-shaped grooves with smaller width to height ratio are recommended for the lower Reynolds number flow, while the ridge-shaped grooves with larger width to height ratio are be more suitable for the larger Reynolds number flow.

关键词： microchannel bionic grooves drag reduction lattice Boltzmann method

Influential Intensity of Urban Agglomeration on Evolution of Ecoenvironmental Pressure:A Case Study of Changchun,China

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Chinese Geographical Science 2017年第4期27卷 638-647页

作者： liu Yanjun ZHANG jing LI Chenggu ZHOU Guolei fu Zhanhui liu Degang School of Geography Sciences Northeast Normal UniversityChangchun 130024China

In this paper,we study the interactive relationship between the agglomeration of urban elements and the evolution of eco-environmental *** build an index system for evaluating the agglomeration of urban elements and eco-environmental *** the entropy method and response intensity model,we analyze how urban elements agglomeration influenced eco-environmental pressure in Changchun from 1990 to 2012,eliciting the changing features and influential ***,we conclude there is a significant interactive relationship between the agglomeration of urban elements and the evolution of eco-environmental pressure in *** is inferred from the degree of this agglomeration in Changchun having increased since 1990,with the degree of eco-environmental pressure first decreasing and then *** this,the impact of urban elements agglomeration on eco-environmental pressure has changed from negative to *** main reasons behind this shift are arguably the rapid growth of urban investment and ongoing urbanization.

关键词： urban elements agglomeration eco-environmental pressure influential intensity response index Changchun China

A Parallel Quantum Algorithm for the Satisfiability Problem

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Communications in Theoretical Physics 2008年第3期49卷 629-630页

作者： liu Wen-Zhang ZHANG jing-fu LONG Gui-Lu Key Laboratory for Atomic and Molecular NanoSciences and Department of Physics Tsinghua University Beijing 100084 China Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China

In this paper we present a classical parallel quantum algorithm for the satisfiability problem. We have exploited the classical parallelism of quantum algorithms developed in [G.L. Long and L. Xiao, Phys. Rev. A 69 （2004） 052303], so that additional acceleration can be gained by using classical parallelism. The quantum algorithm first estimates the number of solutions using the quantum counting algorithm, and then by using the quantum searching algorithm, the explicit solutions are found.

关键词： satisfiability problem quantum search algorithm long algorithm

Accurate Prediction of Ir-H Bond Dissociation Enthalpies by Density functional Theory Methods

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Chinese Journal of Chemistry 2014年第3期32卷 269-275页

作者： Yi Zhou Dingjia liu Yao fu Haizhu Yu jing Shi Department of Polymer Science and Engineering University of Science and Technology BeijingBeijing 100083China Department of Chemistry University of Science and Technology of ChinaHefeiAnhui 230026China

The iridium hydride complexes have been extensively used in organic reactions,such as oxidation and hydro-genation *** many of these reactions,the dissociation or formation of Ir-H bond plays an important role in determining the overall reaction rates and *** the present study,the accuracy of different theoretical meth-ods for prediction of Ir-H bond strengths has been examined on the basis of the previously reported Ir-H BDEs of 17 different *** the performance of different DFT functionals(e.g.B3LYP,TPSS,M06),different basis sets(including the different effective core potentials(ECP)on Ir and I atoms,and the total electron basis sets on the other atoms),and different solvation models(SMD,CPCM,and IEFPCM)in solution phase single point calculations,we found that the gas-phase calculation with TPSS/(LanL2DZ:6-31G(d))method is relatively more accurate than the other gas-phase calculation methods,and can well simulate the Ir-H BDEs in low-polarity solvents(such as chlorobenzene and dichloroethane).Finally,efforts were put in analyzing the structure-activity re-lationships between the ligand structure(around Ir center)and the Ir-H *** wish the present study could benefit future studies on the Ir-H complexes involved organic reactions.

关键词： density functional theory Ir-H bond dissociation enthalpy

nsights into battles between Mycobacterium tuberculosis and macrophages

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Protein & Cell 2014年第10期5卷 728-736页

作者： Guanghua Xu jing Wang George fu Gao Cui Hua liu CAS key Laboratory of Pathogenic Microbiology and Immunology Institute of Microbiology Chinese Academy of Sciences Beijing 100101. China School of Life Sciences Anhui University Hefei 230039 China

As the first line of immune defense for Mycobacterium tuberculosis （Mtb）, macrophages also provide a major habitat for Mtb to reside in the host for years. The battles between Mtb and macrophages have been constant since ancient times. Triggered upon Mtb infection, multiple cellular pathways in macrophages are activated to initiate a tailored immune response toward the invading pathogen and regulate the cellular fates of the host as well. Toll-like receptors （TLRs） expressed on macrophages can recognize pathopatterns （PAMPs） on Mtb and mediate the production of immune-regulatory cytokines such as tumor necrosis factor （TNF） and type I Interferons （IFNs）. In addition, Vitamin D receptor （VDR） and Vitamin D-1- hydroxylase are up-regulated in Mtb-infected macrophages, by which Vitamin D participates in innate immune respon- ses. The signaling pathways that involve TNF, type I IFNs and Vitamin D are inter-connected, which play critical roles in the regulation of necroptosis, apoptosis, and autophagy of the infected macrophages. This review article summarizes cur- rent knowledge about the interactions between Mtb and macrophages, focusing on cellular fates of the Mtb-infected macrophages and the regulatory molecules and cellular pathways involved in those processes.

关键词： Mycobacterium tuberculosis,macrophages necroptosis apoptosis autophagy tumornecrosis factor (TNF) type I Interl:erons (IFNs)

Asymmetric Synthesis of the Ring A Substructure of Genkwadane A

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Chinese Journal of Chemistry 2018年第9期36卷 831-836页

作者： jing Feng Hongli Yin Yi Man Shaomin fu BO liu Key Laboratory of Green Chemistry & Technology of Ministry of Education College of Chemistry Sichuan University Chengdu Sichuan 610064China

A practical approach to the asymmetric synthesis of the ring A substructure of genkwadane A, a daphnane diterpenoid, was developed. This synthesis features the Mukaiyama aldol reaction to introduce the quaternary stereogenic center at C4 and VO（acac）2-catalyzed Jackson-Ellman-Bolrn sulfoxidation to deliver the corresponding sulfoxide. The Dieckmann-type condensation was efficiently promoted by KHMDS and the ring A substructure was finally accomplished through Barton iodination condition.

关键词： genkwadane A daphnane Mukaiyama aldol sulfoxidation Dieckmann-type condensation