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Manipulating d-d orbital hybridization induced by Mo-doped Co_(9)S_(8) nanorod arrays for high-efficiency water electrolysis

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Journal of Energy Chemistry 2024年第6期93卷 592-600,I0015页

作者： Xue Zhou Jing Li Guangyao Zhou Weiran Huang Yucan Zhang jun Yang Huan pang Mingyi Zhang Dongmei Sun Yawen Tang Lin Xu Jiangsu Key Laboratory of New power Batteries Jiangsu Collaborative Innovation Centre of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023JiangsuChina 'College of Science Jinling Institute of TechnologyNanjing 211169JiangsuChina State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Nanjing IpE institute of Green Manufacturing Industry Nanjing 211100JiangsuChina School of Chemistry and Chemical engineering Yangzhou UniversityYangzhou 225009JiangsuChina Key Laboratory for photonic and electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025HeilongjiangChina

precisely refining the electronic structure of electrocatalysts represents a powerful approach to further optimize the electrocatalytic ***,we demonstrate an ingenious d-d orbital hybridization concept to construct Mo-doped Co_(9)S_(8) nanorod arrays aligned on carbon cloth(CC)substrate(abbreviated as Mo-Co_(9)S_(8)@CC hereafter)as a high-efficiency bifunctional electrocatalyst toward water *** has experimentally and theoretically validated that the 4d-3d orbital coupling between Mo dopant and Co site can effectively optimize the H_(2)O activation energy and lower H^(*)adsorption energy barrier,thereby leading to enhanced hydrogen evolution reaction(HEr)and oxygen evolution reaction(OEr)*** to the unique electronic and geometrical advantages,the optimized Mo-Co_(9)S_(8)@CC with appropriate Mo content exhibits outstanding bifunctional performance in alkaline solution,with the overpotentials of 75 and 234 mV for the delivery of a current density of 10 mA cm^(-2),small Tafel slopes of 53.8 and 39.9 mV dec~(-1)and long-term stabilities for at least 32 and 30 h for HEr and OEr,*** impressively,a water splitting electrolylzer assembled by the self-supported Mo-Co_(9)S_(8)@CC electrode requires a low cell voltage of 1.53 V at 10 mA cm^(-2)and shows excellent stability and splendid reversibility,demonstrating a huge potential for affordable and scalable electrochemical H_(2) *** innovational orbital hybridization strategy for electronic regulation herein provides an inspirable avenue for developing progressive electrocatalysts toward new energy systems.

关键词： d-d orbital hybridization Transition metal sulfides Nanorods arrays Water electrolysis

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MAX618在电磁微电机步进驱动中的应用

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微处理机 2005年第1期26卷 47-49页

作者：王守亮陈佳品李振波高杨陈文元赵小林上海交通大学微纳米技术研究院上海200030 中国工程物理研究院电子工程研究所绵阳621900

本文介绍了电磁微电机步进驱动的系统结构和MAX618升压芯片的特点,以及MAX618芯片在系统中的应用,并与其它电源升压芯片做了比较。验证了MAX618在微码轮系统中使用的有效性。

关键词： MAX618 DC—DC变换器微电机

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嵌段聚(二甲基-甲基乙烯基-b-二苯基-b-二甲基-甲基乙烯基)硅氧烷的制备及其力学性能

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山东大学学报（理学版） 2002年第6期37卷 524-526,531页

作者：郑德强刘宗林胡文军王勤夏毅然山东大学化学与化工学院济南250100 中国工程物理研究院绵阳921900 山东省医疗器械研究所济南250013

以氢氧化锂为引发剂 ,采用环四硅氧烷作单体 ,二甲基甲酰胺作促进剂 ,分步加料 ,制备了一类新的三嵌段共聚有机硅氧烷 .分子中聚二苯基硅氧烷 (p)构成中间嵌段 ,两端连接聚二甲基 -甲基乙烯基硅氧烷 (M) ,形成MpM型嵌段共聚物 .聚二苯... 详细信息

以氢氧化锂为引发剂 ,采用环四硅氧烷作单体 ,二甲基甲酰胺作促进剂 ,分步加料 ,制备了一类新的三嵌段共聚有机硅氧烷 .分子中聚二苯基硅氧烷 (p)构成中间嵌段 ,两端连接聚二甲基 -甲基乙烯基硅氧烷 (M) ,形成MpM型嵌段共聚物 .聚二苯基硅氧烷 (p)的引入 ,是为增加分子间的引力 .分子中所含二苯基硅氧链节质量约占高分子总质量的 7% .为了便于硫化加工 ,适量的甲基-乙烯基硅氧链节分散在两个M嵌段中 ,其总的质量则分别占高分子总质量的 0 % ,0 .1% ,0 .2 % ,0 .4 %和 0 .6% .为便于比较硫化硅橡胶的力学性能 ,制备了相应的无规共聚物 .将所得全部共聚有机硅氧烷分别进行硫化 ,测定了某些力学性能发现 ,它们均优于相应的无规共聚物 .嵌段共聚物中甲基 -乙烯基硅氧链节的质量占高分子总质量的 0 .1%和 0 .2 % ,其硫化胶片的力学性能较高 .

关键词：嵌段聚有机硅氧烷氢氧化锂硅橡胶力学性能 N,N-二甲基甲酰胺

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确定X射线束中心线的方法

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无损检测 2009年第1期31卷 46-47页

作者：徐立学张启戎王建升夏增海宫志桢文君中国工程物理研究院化工材料研究所绵阳621900 中国工程物理研究院动力部绵阳621900

对已知狭缝X射线检测存在的问题进行了研究。使用倒立的T型有机玻璃试件,确定了射线窗口经过的X射线束中心线。讨论了试验相关问题,用该方法确定的中心线对已知狭缝照相检测准确度为±0.02 mm。

关键词： X射线照相狭缝射线窗口 X射线柬中心线

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Electrochemical reconstruction of non-noble metal-based heterostructure nanorod arrays electrodes for highly stable anion exchange membrane seawater electrolysis

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Journal of Energy Chemistry 2024年第4期91卷 370-382页

作者： Jingchen Na Hongmei Yu Senyuan Jia jun Chi Kaiqiu Lv Tongzhou Li Yun Zhao Yutong Zhao Haitao Zhang Zhigang Shao Fuel Cell System and engineering Laboratory Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese academy of Sciences Beijing 100049China

Direct seawater electrolysis for hydrogen production has been regarded as a viable route to utilize surplus renewable energy and address the climate ***,the harsh electrochemical environment of seawater,particularly the presence of aggressive Cl^(-),has been proven to be prone to parasitic chloride ion oxidation and corrosion reactions,thus restricting seawater electrolyzer ***,hierarchical structure(Ni,Fe)O(OH)@NiCoS nanorod arrays(NAs)catalysts with heterointerfaces and localized oxygen vacancies were synthesized at nickel foam substrates via the combination of hydrothermal and annealing methods to boost seawater *** hiera rchical nanostructure of NiCoS NAs enhanced electrode charge transfer rate and active surface area to accelerate oxygen evolution reaction(OEr)and generated sulfate gradient layers to repulsive aggressive Cl^(-).The fabricated heterostructure and vacancies of(Ni,Fe)O(OH)tuned catalyst electronic structure into an electrophilic state to enhance the binding affinity of hydroxyl intermediates and facilitate the structural transformation into amorphousγ-NiFeOOH for promoting ***,through operando electrochemistry techniques,we found that theγ-NiFeOOH possessing an unsaturated coordination environment and lattice-oxygen-participated OEr mechanism can minimize electrode Cl^(-)corrosion enabled by stabilizing the adsorption of OH*intermediates,making it one of the best OEr catalysts in the seawater medium reported to ***,these catalysts can deliver current densities of 100 and 500 mA cm-2for boosting OEr at minimal overpotentials of 245and 316 mV,respectively,and thus prevent chloride ion oxidation ***,a highly stable anion exchange membrane(AEM)seawater electrolyzer based on the non-noble metal heterostructure electrodes reached a record low degradation rate under 100μV h-1at constant industrial current densities of 400 and 600 mA cm-2over 300 h,which exhibits a promi

关键词： Direct seawater electrolysis Anion exchange membrane water electrolysis Oxygen evolution reaction Oxygen vacancies Operando electrochemistry techniques

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脉冲大电流直线驱动装置电-磁-热-结构多场耦合的局域建模方法

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物理学报 2024年第10期73卷 352-361页

作者：孙建王秋良程军胜熊玲丛源涛王贺阳中国科学院大学电子电气与通信学院北京100049 中国科学院电工研究所北京100190 齐鲁中科电工先进电磁驱动技术研究院济南250101

脉冲大电流直线驱动装置运行过程中产生的极端工况导致多种损伤形式.为了研究多场耦合过程并分析多物理参量作用机理,建立了动态下的电磁场、温度场、结构场数学物理模型.利用轨道反向运动及接触远端物理量渐进平移不变的特性进行局域求... 详细信息

脉冲大电流直线驱动装置运行过程中产生的极端工况导致多种损伤形式.为了研究多场耦合过程并分析多物理参量作用机理,建立了动态下的电磁场、温度场、结构场数学物理模型.利用轨道反向运动及接触远端物理量渐进平移不变的特性进行局域求解.模型还考虑了材料属性温度依赖性,热应力,接触面摩擦热等实际因素.各个物理场采用同一套网格体系,电磁场以及温度场的有限元离散格式采用欧拉向后差分形式求解,结构场则采用Newmark法进行求解,完成多场耦合下的数值模拟.通过与数值工具EMAp3D、Comsolol在相同模型和输入条件下的计算结果以及相关实验比较,验证了该模型的可靠性.本文采用一种C型电枢进行案例计算,得到了多参量的典型演化过程,并对速度趋肤效应下的场分布进行了讨论.

关键词：有限元数值模拟滑动电接触摩擦热局域建模

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XOr spin logic operated by unipolar current based on field-free spin-orbit torque switching induced by a lateral interface

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rare Metals 2024年第8期43卷 3868-3875页

作者： Yan-ru Li Mei-Yin Yang Guo-Qiang Yu Bao-Shan Cui Jin-Biao Liu Yong-Liang Li Qi-Ming Shao jun Luo Key Laboratory of Microelectronic Devices and Integrated Technology Institute of MicroelectronicsChinese Academy of Sciences(IMECAS)Beijing 100029China University of Chinese academy of Sciences(UCAS) Beijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China institute of physics Chinese Academy of SciencesBeijing 100190China Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education Lanzhou UniversityLanzhou 730000China Department of electronic and Computer engineering The Hong Kong University of Science and TechnologyHong Kong 999077China

Spin logics have emerged as a promising avenue for the development of logic-in-memory *** particular,the realization of XOr spin logic gates using a single spin-orbit torque device shows great potential for low-power stateful logic circuits in the next *** this study,we successfully obtained the XOr logic gate by utilizing a spin-orbit torque device with a lateral interface,which was created by local ion implantation in the Ta/pt/Co/Ta Hall device exhibiting perpendicular magnetic *** angle of the lateral interface is set at 45°relative to the current direction,leading to the competition between symmetry breaking and current-driven Néel-type domain wall ***,the field-free magnetic switching reversed is realized by the same sign of current amplitude at this *** on this field-free magnetic switching behavior,we successfully proposed an XOr logic gate that could be implemented using only a single spin-orbit torque Hall *** study provides a potentially viable approach toward efficient spin logics and in-memory computing architectures.

关键词： Filed-free magnetic switching Spin-orbit torque XOr logic gate Lateral interface

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Floquet-engineering Topological phase Transition in Graphene Nanoribbons by Light

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Chinese physics Letters 2024年第9期41卷 69-87页

作者： Anhua Huang Shasha Ke Ji-Huan Guan jun Li Wen-Kai Lou SKLSM Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Materials Science and Opto-electronic Technology Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China Department of physics School of Physical Science and TechnologyXiamen UniversityXiamen 361005China

Quasi-one-dimensional(1D)graphene nanoribbons(GNrs)play a crucial role in advancement of nextgeneration *** studies have suggested their potential to exhibit unique symmetry-protected topological phases defined by a𝑍2 *** employing both the tight-binding model and the Floquet theory,our investigation demonstrates the effective control of the topological phase within quasi-1D armchair GNrs(AGNrs)using elliptically polarized light,unveiling rich topological phase ***,we observe that varying the amplitude of the light can induce transitions in the band gap(𝐸g)of AGNrs,leading to multiple changes in the system’s𝑍2 ***,for heterojunctions composed of different AGNr segments,the junction state can be either created or eliminated by the application of elliptically polarized light.

关键词： topological polarized Transition

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The residual C concentration control for low temperature growth p-type GaN

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Chinese physics B 2017年第10期26卷 411-416页

作者：刘双韬赵德刚杨静江德生梁锋陈平朱建军刘宗顺李翔刘炜邢瑶张立群 State Key Laboratory on Integrated Optoelectronics institute of Semiconductors Chinese academy of Sciences School of electronic Electrical and Communication engineering University of Chinese academy of Sciences Suzhou institute of Nano-tech and Nano-bionics Chinese academy of Sciences

In this work, the influence of C concentration to the performance of low temperature growth p-GaN is studied. Through analyses, we have confirmed that the C impurity has a compensation effect to p-GaN. At the same time we have found that several growth and annealing parameters have influences on the residual C concentration：（i） the C concentration decreases with the increase of growth pressure; （ii） we have found there exists a Ga memory effect when changing the Cp2Mg flow which will lead the growth rate and C concentration increase along the increase of Cp2Mg flow; （iii） annealing outside of metal-organic chemical vapor deposition （MOCVD） could decrease the C concentration while in situ annealing in MOCVD has an immobilization role to C concentration.

关键词： nitride materials p-GaN C concentration

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尿中氚水和总氚的分析测定

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四川环境 2004年第1期23卷 42-44页

作者：王兰新张太明阮光林刘学军罗宁中国工程物理研究院核物理与化学研究所四川绵阳621900

用蒸馏-液闪法和氧化蒸馏-液闪法分别测量了氚污染人员尿中的氚水浓度和总氚(氚水和有机氚)浓度。根据72个高于本底水平的尿中氚水和总氚浓度分析比较,认为在氚内污染工作人员的尿中,有机氚与氚水的浓度比值为(5 4±3 7)%。

关键词：氚水总氚尿氧化蒸馏

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