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Regulating atomic Fe-Rh site distance for efficient oxygen reduction reaction

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Science China Chemistry 2024年第4期67卷 1352-1359页

作者： Tong liu Yudan Chen Airong Xu Xiaokang liu Dong liu Sicheng li Hui Huang li Xu Shuaiwei Jiang Qiquan Luo Tao Ding Tao Yao national Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Key Laboratory of Precision and Intelligent Chemistry Hefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601China

Exploring the atomic interaction mechanisms of dense single-atom catalysts(SACs)is of great significance for their application in oxygen reduction reaction(ORR).However,the intrinsic mechanism of the site-distance effect on the catalytic performance has been largely ***,we demonstrate the site-distance effect of Fe-Rh_(x)@NC catalysts in ORR theoretically and *** charge analysis reveals that the strong interaction between Fe and Rh atoms at a certain atomic distance(dFe-Rh)alters the catalytic electronic structure,facilitating the optimization of catalyst adsorption *** by the theoretical calculations,we designed and synthesized the Fe-Rhx@NC catalysts through a spatial confinement *** characterization results prove that the Fe-Rh_(2)@NC has the optimal d_(Fe-Rh),which improves its intrinsic ORR activity,providing a half wave potential of 0.91 V,higher than that of the commercial Pt/C(0.86 V).This study emphasizes the importance of determining the basic mechanism of the site-distance effect in dissimilar metal atoms catalysts,which is conducive to the design of efficient catalyst systems for practical applications.

关键词： Density functional theory single-atom catalyst in-situ encapsulating site-distance effect oxygen reduction reaction

Analytical evaluation of steady-state solute distribution in through- diffusion and membrane behavior test under non-perfectly flushing boundary conditions

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第1期16卷 258-267页

作者： Guannian Chen Yuchao li Kristin MSample-Lord Shan Tong School of Civil&Environmental Engineering and Geography Science Ningbo UniversityNingbo315211China MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering College of Civil Engineering and ArchitectureZhejiang UniversityHangzhou310058China Ningbo ZCONE High-tech Company limited Ningbo315000China Department of Civil and Environmental Engineering Villanova UniversityVillanovaPAUSA

The through-diffusion and membrane behavior testing procedure using a closed-system apparatus has been widely used for concurrent measurement of diffusion and membrane efficiency coefficients of low-permeability clay-based barrier ***,the common assumption of perfectly flushing conditions at the specimen boundaries could induce errors in analyses of the diffusion coefficients and membrane *** this study,an innovative pseudo three-dimensional(3D)analytical method was proposed to evaluate solute distribution along the boundary surfaces of the soil-porous disks system,considering the non-perfectly flushing *** results were consistent with numerical models under two scenarios considering different inflow/outflow *** proposed model has been demonstrated to be an accurate and reliable method to estimate solute distributions along the *** calculated membrane efficiency coefficient and diffusion coefficient based on the proposed analytical method are more accurate,resulting in up to 50%less relative error than the traditional approach that adopts the arithmetic mean value of the influent and effluent *** retar-dation factor of the clay specimen also can be calculated with a revised cumulative mass ***,the simulated transient solute transport matched with experimental data from a multi-stage through-diffusion and membrane behavior test,validating the accuracy of the proposed method.

关键词： Diffusion testing Membrane behavior Coupled transport Clay barrier Transport modeling

Paroxysmal Kinesigenic Dyskinesia:Genetics and Pathophysiological Mechanisms

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Neuroscience Bulletin 2024年第7期40卷 952-962页

作者： Jiao-Jiao Xu Hong-Fu li Zhi-Ying Wu Department of Medical Genetics and Center for Rare Diseases The Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310009China Department of Neurology in the Second Affiliated Hospital Key Laboratory of Medical Neurobiology of Zhejiang ProvinceZhejiang University School of MedicineHangzhou 310009China

Paroxysmal kinesigenic dyskinesia(PKD),the most common type of paroxysmal movement disorder,is characterized by sudden and brief attacks of choreoathetosis or dystonia triggered by sudden voluntary *** is mainly caused by mutations in the PRRT2 or TMEM151A *** exact pathophysiological mechanisms of PKD remain unclear,although the function of PRRT2 protein has been well characterized in the last *** on abnormal ion channels and disturbed synaptic transmission in the absence of PRRT2,PKD may be channelopathy or synaptopathy,or *** addition,the cerebellum is regarded as the key pathogenic *** depolarization in the cerebellum is tightly associated with dyskinetic ***,in PKD,other than the cerebellum,the role of the cerebrum including the cortex and thalamus needs to be further investigated.

关键词： Paroxysmal kinesigenic dyskinesia PRRT2 TMEM151A Genetics Pathophysiological mechanisms

Special Issue:Dynamic Polymer Networks

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Chinese Journal of Polymer Science 2024年第10期42卷 1401-1402页

作者： Jun-Qi Sun Zhi-Bo li Tao Xie 不详

The ease of processing and light weight have made polymeric materials uniquely suited for numerous general ***,realization of their switchable chain configuration/mobility and molecular design versatility has pushed p... 详细信息

关键词： uniquely realization polymeric

Core-shell nanoparticle enhanced Raman spectroscopy in situ probing the composition and evolution of interfacial species on PtCo surfaces

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nano Research 2024年第6期17卷 4687-4692页

作者： Jing liu Han-liang Zhong Xiangyu li Mu-Fei Yue Wei-Min Yang Xueqiu You Jing-Hua Tian Yao-Hui Wang Jian-Feng li Fujian Provincial Key Laboratory of Oceanic Information Perception and Intelligent Processing School of Ocean Information EngineeringJimei UniversityXiamen 361021China College of Chemistry Fuzhou UniversityFuzhou 350108China State Key Laboratory of Physical Chemistry of Solid Surfaces MOE Key Laboratory of Spectrochemical Analysis and InstrumentationiChEMCollege of Chemistry and Chemical EngineeringCollege of MaterialsCollege of EnergyXiamen UniversityXiamen 361005China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China Shenzhen Research Institute of Xiamen University Shenzhen 518000China

The composition and evolution of interfacial species play a key role during electrocatalytic *** the structural evolution and intermediate during catalytic process by in situ characterization can shed new light on the electrocatalytic reaction mechanism and develop highly efficient ***,directly probing the interfacial species is extremely difficult for most spectroscopic techniques due to complicated interfacial environment and ultra-low surface ***,electrochemical core-shell nanoparticle enhanced Raman spectroscopy is utilized to probe the composition and evolution processes of interfacial species on Au@Pt,Au@Co,and Au@PtCo core-shell nanoparticle *** spectral evidences of interfacial intermediates including hydroxide radical(OH*),superoxide ion(O_(2)^(−)),as well as metal oxide species are directly captured by in situ Raman spectroscopy,which are further confirmed by the both isotopic experiment and density functional theory *** results provide a mechanistic guideline for the rational design of highly efficient electrocatalysts.

关键词： in situ Raman core-shell nanoparticle PtCo interfacial species composition and evolution

Gitelman综合征2例患者的遗传学分析

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中华医学遗传学杂志 2024年第3期41卷 331-334页

作者：李志杰李文赵向宇李琳临沂市人民医院妇产科临沂276003 临沂市人民医院生殖医学科临沂276003 临沂市人民医院遗传检验科临沂276003 临沂市检验医学重点实验室临沂276003

目的探讨2例Gitelman综合征(GS)患者的遗传学病因。方法选取分别于2022年1月和6月就诊于临沂市人民医院的2例GS患者作为研究对象进行回顾性研究。收集患者的血清检测血清电解质水平及电解质排泄量资料。采集患者外周血样提取基因组Dna... 详细信息

目的探讨2例Gitelman综合征(GS)患者的遗传学病因。方法选取分别于2022年1月和6月就诊于临沂市人民医院的2例GS患者作为研究对象进行回顾性研究。收集患者的血清检测血清电解质水平及电解质排泄量资料。采集患者外周血样提取基因组Dna进行全外显子组测序,并进行Sanger测序验证。结果患者1为27岁女性,血清钠、钾、氯及镁水平以及24 h尿氯、钙水平均低于参考值。基因检测发现其携带SLC12A3:c.1456G>A(p.D486N)和SLC12A3:c.179C>T(p.T60M)复合杂合变异,前者遗传自其母亲,为已报道致病性变异。患者2为4岁男性,血钠、氯和镁水平低于参考值,血钾出现危急值。SLC12A3基因检出母源致病性c.602-16G>A和父源c.805_806insTTGGCGTGGTCTCGGTCA(p.V268_T 269insIGVVSV)复合杂合变异。根据美国医学遗传学与基因组学学会指南,患者2携带的变异均被判定为致病性变异(PVS1+PM2_Supporting+PP3;PVS1+PM2_Supporting+PM4)。结论上述SLC12A3变异考虑为2例GS患者的遗传学病因。

关键词：肾小管 Gitelman综合征 SLC12A3基因基因变异

Response of π-phase-shifted fiber Bragg grating to inhomogeneous strain fields caused by ultrasonic wave

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Chinese Journal of Acoustics 2024年第2期43卷 218-231页

作者： AN Bingwen WU Xianmei li Ziqi li Feiran Institute of Acoustics Chinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049

Aiming at different sensing characteristics on waveform and amplitude of aπ-phase-shifted fiber Bragg grating under axially and vertically incident ultrasonic wave in water, a fiber Bragg grating ultrasonic sensing model is established based on transfer matrix method. Inhomogeneous strain fields along grating under axially and vertically incident ultrasonic wave are calculated, which helps analyze sensing characteristics of π-phase-shifted fiber Bragg grating under above two situations by using further wavelength shift results. Experiments are then performed to verify analytical results. Results show that the sensing characteristics of π-phase-shifted fiber Bragg grating are obviously affected by different inhomogeneous strain field distributions under two incident angles. Both sensing waveform and amplitude under vertically incident ultrasonic wave perform better than axially, and π phase shift plays a significant effect on sensing characteristics. With the increase of the distance between incident position and phase shift point, the response under vertically incident ultrasonic significantly declines. The research provides guidance for analyzing ultrasonic sensing mechanism of π-phase-shifted fiber Bragg grating.

关键词： fiber shifted wave

Persistent organic pollutants and chemicals of emerging Arctic concern in the Arctic environment

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Environmental Science and Ecotechnology 2024年第2期18卷 1-3页

作者： Yi-Fan li Roland Kallenborn Zifeng Zhang International Joint Research Center for Persistent Toxic Substances(IJRC-PTS) State Key Laboratory of Urban Water Resource and EnvironmentHarbin Institute of TechnologyHarbin 150090China International Joint Research Center for Arctic Environment and Ecosystem(IJRC-AEE) Polar AcademyHarbin Institute of Technology(PA-HIT)Harbin 150090China Heilongjiang Provincial Key Laboratory of Polar Environment and Ecosystem(HPKL-PEE) Harbin 150090China IJRC-PTS-na TorontoONM2J 3N8Canada Faculty of Chemistry Biotechnology and Food Sciences(KBM)Norwegian University of Life Sciences(NMBU)NOe1433 AsNorway

Environmental pollutants,such as persistent organic pollutants(POPs),enter the Arctic mainly via long-range transport(LRT)through atmospheric and ocean/river *** the other hand,chemicals of emerging Arctic concern(CEACs)are often introduced as local contaminants from industrial,municipal,or infrastructure-related *** of their origins,all these contaminants negatively impact the health of the environment and the indigenous ***,in recent decades,the Arctic has been experiencing unprecedented climate *** combination of Arctic environmental changes and the introduction of new anthropogenic contaminants as chemical aids for exploiting Arctic resources led to a severe imbalance in the Arctic ***,an international consortium of Arctic experts asked for internationally coordinated actions to mitigate the serious problems that environmental pollution causes on Arctic ecosystems and people,according to the Berlin statement[1].

关键词： Arctic statement pollution

裂变创业者组织承诺跨越双路径对比——基于社会交换理论的案例研究

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管理学报 2024年第1期21卷 10-22页

作者：李志刚王娜杜鑫周琳中国海洋大学管理学院南开大学商学院天津市300071

基于社会交换理论视角,以双案例研究方法,选取“独立发展型”和“母体支持型”两类裂变企业的创业者为研究对象,归纳出“母体交换关系情境”“交换关系风险认知”“信任助推承诺波动”“重建新创交换平衡”4个核心构念。在此基础上,识... 详细信息

基于社会交换理论视角,以双案例研究方法,选取“独立发展型”和“母体支持型”两类裂变企业的创业者为研究对象,归纳出“母体交换关系情境”“交换关系风险认知”“信任助推承诺波动”“重建新创交换平衡”4个核心构念。在此基础上,识别出“顺序式”和“交错式”两条不同的裂变创业者组织承诺跨越路径,旨在延伸现有社会交换理论和创业理论,为裂变情境下的组织承诺跨越提供有效指导。

关键词：裂变创业组织承诺跨越社会交换案例研究