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FeO^＋(^6Σ^＋)催化CO还原N2O的理论研究

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高等学校化学学报 2008年第12期29卷 2365-2370页

作者：王瑶傅钢陈浙宁万惠霖固体表面物理化学国家重点实验室厦门大学化学化工学院厦门361005

在B3LYP/6-311+G(2d)//B3LYP/6-31G(d)计算水平下,考察了FeO+(6Σ+)分子如何催化CO还原N2O微观机理.计算结果表明,FeO+(6Σ+)是一种有效的催化剂,其可从N2O中夺取一个O原子,然后再传递给CO,完成整个氧转移过程.结果发现,反应中可能生成... 详细信息

在B3LYP/6-311+G(2d)//B3LYP/6-31G(d)计算水平下,考察了FeO+(6Σ+)分子如何催化CO还原N2O微观机理.计算结果表明,FeO+(6Σ+)是一种有效的催化剂,其可从N2O中夺取一个O原子,然后再传递给CO,完成整个氧转移过程.结果发现,反应中可能生成各种过氧[Fe(O2)+]或双端氧(OFeO+)物种,其中前者比较稳定,后者更活泼.

关键词： FeO+ 氧转移 N2O催化还原

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Molecular crowding electrolytes for stabilizing Zn metal anode in rechargeable aqueous batteries

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Chinese Chemical Letters 2024年第7期35卷 445-451页

作者： Li lin Song-lin Tian Zhen-Yu Hu Yu Zhang Li-Min Chang Jia-Jun wang wan-Qiang Liu Qing-Shuang wang Fang wang School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun 130022China School of Life Science and Technology Changchun University of Science and TechnologyChangchun 130022China Key Laboratory of Preparation and Applications of Environmental Friendly Materials of the Ministry of Education Jilin Normal UniversityChangchun 130103China Zhongshan Institute of Changchun University of Science and Technology Zhongshan 528437China

A solid electrolyte interphase(SEI)with a robust mechanical property and a high ionic conductivity is imperative for high-performance zinc metal ***,it is difficult to form such a SEI directly from an *** this work,a molecular crowding effect is based on the introduction of Zn(OTF)_(2)and Zn(ClO_(4))_(2)to 2 mol/L ZnSO_(4)*** and experiments indicate that the Zn(OTF)_(2)and Zn(ClO_(4))_(2)not only create a molecularly crowded electrolyte environment to promote the interaction of Zn^(2+)and OTF^(-),but also participate in the reduction to construct a robust and high ionic-conductive SEI,thus promoting metal zinc deposition to the(002)crystal *** this molecular crowding electrolyte,a high current density of 1 mA/cm^(2)can be obtained by assembling symmetric batteries with Zn as the anode for over 1000 *** in a temperature environment of-10℃,a current density of 1 mA/cm^(2)can be obtained by assembling symmetric batteries with Zn for over 200 ***//Bi_(2)S_(3)/VS4@C cells achieve a CE rate of up to 99.81%over 1000 ***,the utilization of a molecular crowding electrolyte is deemed a highly effective approach to fabricating a sophisticated SEI for a zinc anode.

关键词： Zinc ion batteries Anode Electrolyte Solid electrolyte interphase Molecular crowding effect

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Giant piezotronic effect in ferroelectric field effect transistor

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Nano Research 2024年第9期17卷 8465-8471页

作者： Haiming Zhang Mengshuang Chi Shidai Tian Tian Liang Jitao Liu Xiang Zhang lingyu wan Zhong lin wang Junyi Zhai Center on Nanoenergy Research School of Physical Science&TechnologyGuangxi UniversityNanning 530004China Beijing Key Laboratory of Micro-Nano Energy and Sensor Center for High-Entropy Energy and SystemsBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China School of Nanoscience and Engineering University of Chinese Academy of ScienceBeijing 100049China School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China Georgia Institute of Technology AtlantaGA 30332USA

The piezotronics effect utilizes a piezopotential to modulate and control current in *** materials,as a type of piezoelectric materials,possess piezoelectric coefficients that are significantly larger than those found in conventional piezoelectric ***,we propose a strain modulated ferroelectric field-effect transistor(St-FeFET)utilizing external strain instead of gate voltage to achieve ferroelectric modulation,which eliminates the need for gate *** applying a very small strain(0.01%),the St-FeFET can achieve a maximum on-off current ratio of 1250%and realizes a gauge factor(GF)of 1.19×10^(6),which is much higher than that of conventional strain *** work proposes a new method for realizing highly sensitive strain sensors and presents innovative approaches to the operation methods of ferroelectric field-effect transistors as well as potential applications for coupling of strain sensors and various devices across different fields.

关键词： ferroelectric field-effect transistors piezotronics [Pb(Mg_(1/3)Nb_(2/3))O_(3)]_((1-x)^(-))[PbTiO_(3)]_(x)(PMN-PT) strain sensors

Computerized tomography-guided therapeutic percutaneous puncture catheter drainage-combined with somatostatin for severe acute pancreatitis: An analysis of efficacy and safety

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World Journal of Gastrointestinal Surgery 2024年第1期16卷 59-66页

作者： Xue-Lan Zheng wan-ling Li Yan-Ping lin Ting-Long Huang Department of Critical Care Medicine The Second Affiliated Hospital of Fujian Medical UniversityQuanzhou 362000Fujian ProvinceChina CT Room The Second Affiliated Hospital of Fujian Medical UniversityQuanzhou 362000Fujian ProvinceChina

BACKGROUND Severe acute pancreatitis(SAP),a condition with rapid onset,critical condition and unsatisfactory prognosis,poses a certain threat to human health,warranting optimization of relevant treatment plans to improve treatment *** To evaluate the efficacy and safety of computerized tomography-guided the-rapeutic percutaneous puncture catheter drainage(CT-TPPCD)combined with somatostatin(SS)in the treatment of *** Forty-two SAP patients admitted to The Second Affiliated Hospital of Fujian Medical University from June 2020 to June 2023 were *** the basis of routine treatment,20 patients received SS therapy(control group)and 22 patients were given CT-TPPCD plus SS intervention(research group).The efficacy,safety(pancreatic fistula,intra-abdominal hemorrhage,sepsis,and organ dysfunction syndrome),abdominal bloating and pain relief time,bowel recovery time,hospital stay,inflammatory indicators(C-reactive protein,interleukin-6,and pro-calcitonin),and Acute Physiology and Chronic Health Evaluation(APACHE)II score of both groups were evaluated for *** Compared with the control group,the research group had a markedly higher total effective rate,faster abdominal bloating and pain relief and bowel recovery,INTRODUCTION Pancreatitis,an inflammatory disease occurring in the pancreatic tissue,is classified as either acute or chronic and is associated with high morbidity and mortality,imposing a socioeconomic burden[1,2].The pathogenesis of this disease involves early protease activation,activation of nuclear factor kappa-B-related inflammatory reactions,and infiltration of immune cells[3].Severe acute pancreatitis(SAP)is a serious condition involving systemic injury and subsequent possible organ failure,accounting for 20%of all acute pancreatitis cases[4].SAP is also characterized by rapid onset,critical illness and unsatisfactory prognosis and is correlated with serious adverse events such as systemic inflammatory response syn-drome an

关键词： Computerized tomography guidance Therapeutic percutaneous puncture catheter drainage Somatostatin Severe acute pancreatitis Efficacy and safety

Magnetic Fields Reduce Apoptosis by Suppressing Phase Separation of Tau-441

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Research 2024年第1期2023卷 181-197页

作者： Wen-Juan lin Wen-Pu Shi wan-Yi Ge Liang-Liang Chen Wei-Hong Guo Peng Shang Da-Chuan Yin Key Laboratory for Space Bioscience and Biotechnology School of Life SciencesNorthwestern Polytechnical University127 Youyixi RoadXi'an 710072ShaanxiPR China

The biological effects of magnetic fields(MFs)have been a controversial ***,in recent years,there has been increasing evidence that MFs do affect biological ***,the physical mechanism remains ***,we show that MFs(16 T)reduce apoptosis in cell lines by inhibiting liquid–liquid phase separation(LLPS)of Tau-441,suggesting that the MF effect on LLPS may be one of the mechanisms for understanding the“mysterious”magnetobiological *** LLPS of Tau-441 occurred in the cytoplasm after induction with *** phase-separated droplets of Tau-441 recruited hexokinase(HK),resulting in a decrease in the amount of free HK in the *** cells,HK and Bax compete to bind to the voltage-dependent anion channel(VDAC I)on the mitochondrial membrane.A decrease in the number of free HK molecules increased the chance of Bax binding to VDAC I,leading to increased Bax-mediated *** the presence of a static MF,LLPS was marked inhibited and HK recruitment was reduced,resulting in an increased probability of HK binding to VDAC I and a decreased probability of Bax binding to VDAC I,thus reducing Bax-mediated *** findings revealed a new physical mechanism for understanding magnetobiological effects from the perspective of *** addition,these results show the potential applications of physical environments,such as MFs in this study,in the treatment of LLPS-related diseases.

关键词： inhibited Apoptosis finding

Large Deviations for a Critical Galton-Watson Branching Process

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Acta Mathematicae Applicatae Sinica 2024年

作者： Dou-dou LI wan-lin SHI Mei ZHANG College of Statistics and Data Science Faculty of Science Beijing University of Technology Laboratory of Mathematics and Complex Systems (Ministry of Education) School of Mathematical SciencesBeijing Normal University Department of Mathematics and Physics North China Electric Power University

In this paper, a critical Galton-Watson branching process{Zn}is considered. Large deviation rates of SZn:=∑i=1ZnXiare obtained, where{Xi, i≥1}is a sequence of independent and identically distributed random variables and X1is in the domain of attraction of an α-stable law with α∈(0, 2). One shall see that the convergence rate is determined by the tail index of X1and the variance of Z1. Our results can be compared with those ones of the supercritical case.

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Gamma Approximation Based Multi-Antenna Covert Communication Detection

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China Communications 2024年第9期 90-97页

作者： wan Pengwu Chen Dongrui wang Danyang hui Xi Peng Kang School of Communications and Information Engineering & School of Artificial Intelligence Xi'an University of Posts and Telecommunications Key Laboratory of Integrated Service Networks School of Telecommunications EngineeringXidian University

Covert communication technology makes wireless communication more secure,but it also provides more opportunities for illegal users to transmit harmful *** order to detect the illegal covert communication of the lawbreakers in real time for subsequent processing,this paper proposes a Gamma approximation-based detection method for multi-antenna covert communication ***,the Gamma approximation property is used to calculate the miss detection rate and false alarm rate of the monitor *** the optimization problem to minimize the sum of the missed detection rate and the false alarm rate is *** optimal detection threshold and the minimum error detection probability are solved according to the properties of the Lambert W ***,simulation results are given to demonstrate the effectiveness of the proposed method.

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Nickel-iron in the second coordination shell boost single-atomicsite iridium catalysts for high-performance urea electrooxidation

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Nano Research 2024年第5期17卷 3919-3926页

作者： Xiaoyu Chen Jiawei wan Jing Chai Liang Zhang Fang Zhang Qinghua Zhang lin Gu Lirong Zheng Ranbo Yu Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of Biochemical Engineering Key Laboratory of Biopharmaceutical Preparation and DeliveryChinese Academy of SciencesInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Center for Combustion Energy School of Vehicle and MobilityState Key Laboratory of Intelligent Green Vehicle and MobilityTsinghua UniversityBeijing 100084China Analysis and Testing Center Beijing Institute of TechnologyBeijing 100081China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials Department of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

Single-atom catalysts(SACs)with high catalytic activity as well as great stability are demonstrating great promotion in electrocatalytic energy conversion,which is also a big challenge to ***,we proposed a facile synthetic strategy to construct nickel-iron bimetallic hydroxide nanoribbon stabilized single-atom iridium catalysts(Ir-NiFe-OH),where the nickel-iron hydroxide nanoribbon not only can serve as good electronic conductor,but also can well stabilize and fully expose single-atom *** as catalyst for urea oxidation reaction(UOR),it exhibited excellent UOR performance that it only needed a low operated potential of 1.38 V to achieve the current density of 100 mA·cm^(-2).In-situ Fourier transform infrared spectroscopy,X-ray absorption spectrum,and density functional theory calculations proved that Ir species are active centers and the existence of both Ni and Fe in the local structure of Ir atom can optimize the d-band center of Ir species,promoting the adsorption of intermediates and desorption of products for *** hydrogen evolution reaction(HER)/UOR electrocatalytic cell demanded voltages of 1.46 and 1.50 V to achieve 50 and 100 mA·cm^(-2),respectively,which demonstrated a higher activity and better stability than those of conventional *** work opens a new avenue to develop catalysts for UORs with boosted activity and stability.

关键词： single-atom iridium coordinate structure nanoribbon urea electrooxidation

Optical facet coatings for high-performance LWIR quantum cascade lasers at λ ∼ 8.5 µm

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Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves 2024年第4期43卷 497-502页

作者： Ma, Yuan lin, Yu-Zhe wan, Chen-Yang wang, Zi-Xian Zhou, Xu-Yan Zhang, Jin-Chuan Liu, Feng-Qi Zheng, wan-Hua Laboratory of Solid-State Optoelectronics Information Technology Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China Weifang Academy of Advanced Opto-Electronic Circuits Weifang 261021 China

We report on the performance improvement of long-wave infrared quantum cascade lasers（LWIR QCLs）by studying and optimizing the anti-reflection（AR）optical facet coating. Compared to the Al2O3 AR coating，the Y2O3 AR coating exhibits higher catastrophic optical mirror damage（COMD）level，and the optical facet coatings of both material systems have no beam steering effect. A 3-mm-long，9. 5-μm-wide buried-heterostructure（BH）LWIR QCL of λ ~ 8. 5 μm with Y2O3 metallic high-reflection（HR）and AR of ~ 0. 2% reflectivity coating demonstrates a maximum pulsed peak power of 2. 19 W at 298 K，which is 149% higher than that of the uncoated device. For continuous-wave（CW）operation，by optimizing the reflectivity of the Y2O3 AR coating，the maximum output power reaches 0. 73 W，which is 91% higher than that of the uncoated device. © 2024 Chinese Optical Society. All rights reserved.

关键词： Quantum cascade lasers