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Chemical Research in Chinese Universities 2020年第4期36卷 560-583页

作者： PAN Lu DONG Jinyang YI Ding yang yijun WANG Xi Department of Physics School of ScienceBeijing Jiaotong UniversityBeijing 100044P.R.China Chemistry ami Chemical Engineering Guangdong Laboratory Shantou 515031P.R.China Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081P.R.China

Developing new types of rechargeable batteries with high energy densities and low cost have received in creasing attentions,aiming to reduce the dependence on high-priced *** Li-ion batteries,the potential alternatives including Na-ion batteries,Li-S batteries and Li-air batteries have been investigated recently,which are required to be viable for commercial *** this point of view,to understand the electrochemical reaction mechanisms and kinetics of these batteries has become the key challenge to make breakthroughs in the field of new energy *** this review,we present a critical overview of the two dimensional nanomaterials-based batteries(except Li-ion-based batteries)that could meet such *** develop new energy storage devices with more promising performances,the microstructure evolution and atomic scale storage mechanism of these batteries are comprehensively *** addition,the major challenges and opportunities of advanced characterization techniques are finally *** do hope that this review will give the readers a clear and profound understanding of the electrochemical reaction mechanisms and kinetics of the as-discussed *** effectively contributing to the smart design of future-generation energy storage devices.

关键词： Two dimensional(2D)nanomaterial Batteries beyond Li ion In sinu technique Atomic-level Storage mechanism and kinetics

Toward Quantifying the Increasing Accessibility of the Arctic Northeast Passage in the Past Four Decades

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Advances in Atmospheric Sciences 2023年第12期40卷 2378-2390,I0016-I0018页

作者： Chao MIN Xiangying ZHOU Hao LUO yijun yang Yiguo WANG Jinlun ZHANG Qinghua yang School of Atmospheric Sciences Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China Department of Atmospheric and Oceanic Sciences Fudan UniversityShanghai 200438China Nansen Environmental and Remote Sensing Center and Bjerknes Centre for Climate Research 2007 BergenNorway Polar Science Center Applied Physics LabUniversity of WashingtonSeattleWA 98105USA

Sea ice,one of the most dominant barriers to Arctic shipping,has decreased dramatically over the past four *** maritime transport is hereupon growing in recent *** produce a long-term assessment of trans-Arctic accessibility,we systematically revisit the daily Arctic navigability with a view to the combined effects of sea ice thickness and concentration throughout the period 1979−*** general trends of Navigable Windows(NW)in the Northeast Passage show that the number of navigable days is steadily growing and reached 89±16 days for Open Water(OW)ships and 163±19 days for Polar Class 6(PC6)ships in the 2010s,despite high interannual and interdecadal variability in the *** consecutive NWs have emerged annually for both OW ships and PC6 ships since 2005 because of the faster sea ice *** the 1980s,the number of simulated Arctic routes has continuously increased,and optimal navigability exists in these years of record-low sea ice extent(e.g.,2012 and 2020).Summertime navigability in the East Siberian and Laptev Seas,on the other hand,varies dramatically due to changing sea ice *** systematic assessment of Arctic navigability provides a reference for better projecting the future trans-Arctic shipping routes.

关键词： Arctic sea ice Arctic shipping climate change human-environment

Engineering Spin States of Isolated Copper Species in a Metal-Organic Framework Improves Urea Electrosynthesis

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Nano-Micro Letters 2023年第9期15卷 536-549页

作者： Yuhang Gao Jingnan Wang yijun yang Jian Wang Chuang Zhang Xi Wang Jiannian Yao Key Laboratory of Photochemistry Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China Molecular Plus and Collaborative Innovation Center of Chemical Science and Engineering Tianjin UniversityTianjin 300072People’s Republic of China Department of Physics School of Physical Science and EngineeringBeijing Jiaotong UniversityBeijing 100044People’s Republic of China Research Center for Magnetic and Spintronic Materials National Institute for Materials Science Tsukuba 305-0047Japan

The catalytic activities are generally believed to be relevant to the electronic states of their active center, but understanding this relationship is usually difficult. Here, we design two types of catalysts for electrocatalytic urea via a coordination strategy in a metal–organic frameworks: Cu^(Ⅲ)-HHTP and Cu^(Ⅱ)-HHTP. Cu^(Ⅲ)-HHTP exhibits an improved urea production rate of 7.78 mmol h^(−1)g^(−1) and an enhanced Faradaic efficiency of 23.09% at-0.6 V vs. reversible hydrogen electrode, in sharp contrast to Cu^(Ⅱ)-*** CuⅢspecies with S = 0 spin ground state are demonstrated as the active center in Cu^(Ⅲ)-HHTP, different from Cu^(Ⅱ) with S = 1/2 in Cu^(Ⅱ)-HHTP. We further demonstrate that isolated Cu^(Ⅲ)with an empty dx2-y20orbital in Cu^(Ⅲ)-HHTP experiences a single-electron migration path with a lower energy barrier in the C–N coupling process, while Cu^(Ⅱ)with a single-spin state( d_(x2-y2)^(1)) in Cu^(Ⅱ)-HHTP undergoes a two-electron migration pathway.

关键词： Electrocatalysis Urea synthesis Metal-organic framework Spin catalysis C-N coupling

Fe^(3+)-stabilized Ti_(3)C_(2)T_(x) MXene enables ultrastable Li-ion storage at low temperature

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Journal of Materials Science & Technology 2021年第8期67卷 156-164页

作者： Nana Zhao Fengchu Zhang Fei Zhan Ding Yi yijun yang Weibin Cui Xi Wang Key Laboratory of Electromagnetic Processing of Materials Ministry of EducationDepartment of Physics and Chemistry of MaterialsSchool of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Key Laboratory of Luminescence and Optical Information Ministry of EducationSchool of ScienceBeijingjiaotong UniversityBeijing 100044China Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031China

It is highly important to develop ultrastable electrode materials for Li-ion batteries(LIBs),especially in the low ***,we report Fe^(3+)-stabilized Ti_(3)C_(2)T_(x) MXene(donated as T/F-4:1)as the anode material,which exhibits an ultrastable low-temperature Li-ion storage property(135.2 m A h g^(-1)after300 cycles under the current density of 200 m A g^(-1)at-10℃),compared with the negligible capacity for the pure Ti_(3)C_(2)T_(x) MXene(26 m A h g^(-1)at 200 m A g^(-1)).We characterized as-made T/F samples via the Xray photoelectron spectroscopy(XPS),Fourier transformed infrared(FT-IR)and Raman spectroscopy,and found that the terminated functional groups(-O and-OH)in T/F are Li^(+) storage ***^(3+)-stabilization makes-O/-OH groups in MXene interlayers become active towards Li^(+),leading to much more active sites and thus an enhanced capacity and well cyclic *** contrast,only-O/-OH groups on the top and bottom surfaces of pure Ti_(3)C_(2)T_(x) MXene can be used to adsorb Li^(+),resulting in a low *** electron microscopy(TEM)and XPS data confirm that T/F-4:1 holds the highly stable solid electrolyte interphase(SEI)layer during the cycling at-10℃.Density functional theory(DFT)calculations further uncover that T/F has fast diffusion of Li^(+) and consequent better electrochemical performances than pure Ti_(3)C_(2)T_(x) *** is believed that the new strategy used here will help to fabricate advanced MXene-based electrode materials in the energy storage application.

关键词： Ti_(3)C_(2)T_(x)MXene Li-ion storage Low temperature Solid electrolyte interphase Density functional theory

Estimation of reservoir temperature using silica and cationic solutes geothermometers:a case study in the Tengchong geothermal area

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Chinese Journal Of Geochemistry 2015年第2期34卷 233-240页

作者： Xiaobo Zhang Qinghai Guo Jiexiang Li Mingliang Liu Yanxin Wang yijun yang School of Environmental Studies & State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences

Reservoir temperature estimation is vitally important for assessing the exploitation potential of a geothermal *** this study,the concentrations of major chemical constituents in geothermal water sampled from boiling and hot springs in the Tengchong hydrothermal area were measured,and quartz and cationic solutes geothermometers were used to calculate subsurface ***(Q/K) diagrams and Na-K-Mg triangular diagrams were applied to evaluating the equilibrium status of geothermal water samples with regard to reservoir minerals,and results were used to select suitable *** results show that samples RH01,RH03,RH04,RH05,and LL16 were in or very close to full equilibrium with the selected minerals,and therefore a NaK geothermometer is appropriate.A K/Mg geothermometer,however,is applicable to LP08 and PZH18 whose chemical compositions adjusted to the shallow reservoir temperatures during their re-equilibrium *** contrast,cationic solute geothermometers are unsuitable for SQ20 and RH07,which are categorized as immature water in the Na-K-Mg diagram;a quartz geothermometer was adopted to evaluate the corresponding subsurface temperatures of these *** to the reservoir temperature estimation made in this study,there is at least one high-temperature reservoir below Rehai with a possible temperature range of 210-270 ℃.

关键词：温度采样地热区阳离子地温溶质腾冲储层地质温度计

Evaluation and Forecast Method of AC Contactor Contacts Dynamic Response Based on Theory of Chaos

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Evaluation and Forecast Method of AC Contactor Contacts Dyna...

Precise fabrication of single-atom alloy co-catalyst with optimal charge state for enhanced photocatalysis

The 26th International Conference on Electrical contacts and the 4th International Conference on Reliability of Electrical Products & Electrical Contacts

作者： yang yijun Su Xiuping Cui Chunyan Electrical Engineering Dept.Hebei University of Technology Information & Electrical Engineering Dept.Hebei University of Engineering

ISBN: (纸本)9781622763136

With operating numbers of AC contactors,some tiny variations in mechanical performance and structural parameters would result in electrical performance change,and would extremely influence contactor's dynamic response in the *** it is important to research on dynamic response and failure analysis of AC *** paper introduces a general method to judge chaos motion and to forecast failure, which is based on Lyapunov Exponent(LE) to analyze AC contactors's dynamic *** puts forward some academic theories in optimized-design and safe-operation of AC contactors.

关键词： chaos AC contactor the largest LE forecast

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National Science Review 2021年第1期8卷 81-88页

作者： Yating Pan Yunyang Qian Xusheng Zheng Sheng-Qi Chu yijun yang Chunmei Ding Xi Wang Shu-Hong Yu Hai-Long Jiang Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Soft Matter ChemistryDepartment of Chemistry University of Science and Technology of China National Synchrotron Radiation Laboratory (NSRL) University of Science and Technology of China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of Sciences Key Laboratory of Luminescence and Optical Information Ministry of EducationDepartment of Physics School of Science Beijing Jiaotong University Dalian National Laboratory for Clean Energy State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

While the surface charge state of co-catalysts plays a critical role for boosting photocatalysis, studies on surface charge regulation via their precise structure control remain extremely rare. Herein, metal-organic framework（MOF） stabilized bimetallic Pd@Pt nanoparticles, which feature adjustable Pt coordination environment and a controlled structure from core-shell to single-atom alloy（SAA）, have been ***, apart from the formation of a Mott-Schottky junction in a conventional way, we elucidate that Pt surface charge regulation can be alternatively achieved by changing its coordination environment and the structure of the Pd@Pt co-catalyst, where the charge between Pd and Pt is redistributed. As a result, the optimized Pd;@Pt;/MOF composite, which involves an unprecedented SAA co-catalyst, exhibits exceptionally high photocatalytic hydrogen production activity, far surpassing its corresponding counterparts.

关键词： metal-organic framework (MOF) single-atom alloy (SAA) co-catalyst surface charge state photocatalysis

Research on HOXA11-AS in Malignant Tumors

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Journal of Cancer Therapy 2021年第1期12卷 19-30页

作者： Juncheng Guo Jinfang Zheng yijun yang Affiliated Haikou Hospital of Central South University Xiangya School of Medicine Haikou China Liver and Gallbladder Surgery Hainan General Hospital Haikou China

Long-chain non-coding RNA HOXA11 antisense RNA (HOXA11-AS) is a kind of lncRNA discovered in recent years. Long-chain non-coding RNA (LncRNA) is an important regul

关键词： Long Non-Coding RNA HOXA11-AS Malignant Tumor

“双重结构”与战争话语——再读马尔罗的《反回忆录》

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外国文学研究 2008年第3期30卷 132-141页

作者：杨亦军四川师范大学文学院

《反回忆录》由显性和隐性的"双重结构"组成。前者主要通过现实的空间虚设和从数字化的抽象时间中提取"记忆碎片",组成了一个开放而又没有中心的边缘话语网络;后者则通过时空的"延展"、"空缺",以及时空之间的多重空间组合与时间聚合,造... 详细信息

《反回忆录》由显性和隐性的"双重结构"组成。前者主要通过现实的空间虚设和从数字化的抽象时间中提取"记忆碎片",组成了一个开放而又没有中心的边缘话语网络;后者则通过时空的"延展"、"空缺",以及时空之间的多重空间组合与时间聚合,造成了文本的"内在延展",并促使其不断"生成文本"。而作品独特的文体结构又是通过"组合段平面"和"联想的平面"两个语言系统来完成的。在其语言"记忆系列"中,特定的战争历史成为马尔罗语言的"发送源",并在创作中逐渐形成一种"语言链";而他特有的经历所铸造出的"战争话语"又成为他文学语言的强势话语,转而在作品中辐射开去。因而使作品的"语言"与文体形式达到了高度的统一。

关键词：马尔罗《反回忆录》双重结构战争话语

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NURBS曲面C^1连续参数优化算法

计算机辅助设计与图形学学报 2019年第11期31卷 1882-1888页

作者：李效伟杨义军山东女子学院数据科学与计算机学院济南250300 山东大学计算机科学与技术学院青岛266237

为了在NURBS曲面上生成满足C1连续的近似弧长参数化等参线,将NURBS曲面4条边界的积分能量函数作为目标函数,提出一种基于分段三次重新参数化的曲面参数优化算法.首先推导出NURBS曲面4条边界的参数表达式;然后使用Hermite基函数变换NURB... 详细信息

为了在NURBS曲面上生成满足C1连续的近似弧长参数化等参线,将NURBS曲面4条边界的积分能量函数作为目标函数,提出一种基于分段三次重新参数化的曲面参数优化算法.首先推导出NURBS曲面4条边界的参数表达式;然后使用Hermite基函数变换NURBS曲面u和v方向参数,重新计算参数化等参线,导出变换后的4条边界的积分能量函数;最后通过数值优化算法计算出曲面的最优参数表示.在MFC和OpenGL环境下实现了多个NURBS曲面的等参线分布和纹理映射实验,结果表明该算法是有效的.

关键词： NURBS曲面边界曲线数值优化 C1连续性弧长参数化