检索结果-内蒙古大学图书馆

In situ construction of Cu(Ⅰ)-Cu(Ⅱ) pairs for efficient electrocatalytic nitrate reduction reaction to ammonia

Journal of Energy Chemistry 2025年第1期100卷 106-113页

作者： Muyun Zheng Yuchi Wan Leping Yang Shen Ao Wangyang Fu Zhengjun Zhang Zheng-Hong Huang Tao Ling Feiyu Kang Ruitao Lv State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Institute of New Energy Materials and Engineering School of Materials Science and EngineeringFuzhou UniversityFuzhou 350108FujianChina Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education Tianjin Key Laboratory of Composite and Functional MaterialsSchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China

Electrocatalytic nitrate reduction reaction (NO_(3)-RR) to ammonia under ambient conditions is expected to be a green process for ammonia synthesis and alleviate water pollution *** report a CuO nanoparticles incorporated on nitrogen-doped porous carbon (CuO@NC) catalyst for NO_(3)-*** of Cu(Ⅱ) is reduced to Cu(Ⅰ) during the NO_(3)-RR process to construct Cu(Ⅰ)-Cu(Ⅱ) pairs,confirmed by in situ X-ray photoelectron spectroscopy (XPS) and Raman *** functional theory (DFT) calculations indicated that the formation of Cu(Ⅰ) could provide a reaction path with smaller energy barrier for NO_(3)-RR,while Cu(Ⅱ) effectively suppressed the competition of hydrogen evolution reaction (HER).As a result,CuO@NC catalyst achieved a Faradaic efficiency of 84.2% at -0.49 V versus reversible hydrogen electrode (RHE),and a NH_(3)yield rate of 17.2 mg h^(-1)mg^(-1)*** -0.79 V ***,higher than the HaberBosch process (<3.4 g h^(-1)g^(-1)cat.).This work may open a new avenue for effective NO_(3)-RR by modulating oxidation states.

关键词： Ammonia synthesis Cu oxidation state Electrochemistry Nitrate reduction In situ XPS

来源：评论

学校读者我要写书评

暂无评论

On-chip quantum NOON state sensing for temperature and humidity

引用

Chinese Physics B 2024年第10期33卷 15-20页

作者： Weihong Luo Chao Wu Yuxing Du Chang Zhao Miaomiao Yu Pingyu Zhu Kaikai Zhang Ping Xu Institute for Quantum Information&State Key Laboratory of High Performance Computing College of Computer Science and TechnologyNational University of Defense TechnologyChangsha 410073China

A maximal photon number entangled state,namely NOON state,can be adopted for sensing with a quantum *** this work,we designed silicon quantum photonic chips containing two types of Mach-Zehnder interferometerswherein the two-photon NOON state,sensing element for temperature or humidity,is *** with classicallight or single photon case,two-photon NOON state sensing shows a solid enhancement in the sensing resolution *** the first demonstration of on-chip quantum photonic sensing,it reveals the advantages of photonic chips forhigh integration density,small-size,stability for multiple-parameter sensing serviceability.A higher sensing precision isexpected to beat the standard quantum limit with a higher photon number NOON state.

关键词： quantum sensing NOON state photonic chip

来源：评论

学校读者我要写书评

暂无评论

Dynamic Analysis of Uniformity and Difference for Grid-following and Grid-forming Voltage Source Converters Using Phasor and Topological Homology Methods

引用

Journal of Modern Power Systems and Clean Energy 2025年第1期13卷 3-14页

作者： Haiyu Zhao Hongyu Zhou Wei Yao Qihang Zong Jinyu Wen State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronics EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Grid-following voltage source converter(GFLVSC)and grid-forming voltage source converter(GFM-VSC)have different dynamic characteristics for active power-frequency and reactive power-voltage supports of the power *** paper aims to clarify and recognize the difference between gridfollowing(GFL)and grid-forming(GFM)frequency-voltage support more intuitively and ***,the phasor model considering circuit constraints is established based on the port circuit equations of the *** is revealed that the voltage and active power linearly correspond to the horizontal and vertical axes in the phasor space referenced to the grid voltage ***,based on topological homology,GFL and GFM controls are transformed and mapped into different *** topological similarity of the characteristic curves for GFL and GFM controls is the essential cause of their *** on the above model,it is indicated that GFL-VSC and GFM-VSC possess uniformity with regard to active power response,type of coupling,and phasor *** differ in synchronization,power coupling mechanisms,dynamics,and active power-voltage operation domain in the quasi-steady *** studies are undertaken on GFL-VSC and GFM-VSC integrated into a four-machine two-area *** results verify that the dynamic uniformity and difference of GFL-VSC and GFM-VSC are intuitively and comprehensively revealed.

关键词： Renewable energy grid-following converter grid-forming converter phasor method topological homology

来源：评论

学校读者我要写书评

暂无评论

Chemical and engineering bases for green H2O2 production and related oxidation and ammoximation of olefins and analogues

引用

National science Review 2024年第8期11卷 304-321页

作者： Minghua Qiao Xinggui Zhou Zexue Du Peng Wu Baoning Zong Collaborative Innovation Center of Chemistry for Energy Materials Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University State Key Laboratory of Chemical Engineering East China University of Science and Technology State Key Laboratory of Petroleum Molecular& Process Engineering Research Institute of Petroleum ProcessingSINOPEC State Key Laboratory of Petroleum Molecular& Process Engineering School of Chemistry and Molecular Engineering East China Normal University

Plastics,fibers and rubber are three mainstream synthetic materials that are essential to our daily lives and contribute significantly to the quality of our *** production of the monomers of these synthetic polymers usually involves oxidation or ammoximation reactions of olefins and ***,the utilization of C,O and N atoms in current industrial processes is <80%,which represents the most environmentally polluting processes for the production of basic *** innovation and integration of catalytic materials,new reaction pathways,and reaction engineering,the Research Institute of Petroleum Processing,Sinopec Co.,Ltd.（RIPP） and its collaborators have developed unique H2O2-centered oxidation/ammoximation technologies for olefins and analogues,which has resulted in a ￥500 billion emerging industry and driven trillions of ￥s' worth of downstream *** chemical and engineering bases of the production technologies mainly involve the integration of slurry-bed reactors and microsphere catalysts to enhance H2O2production,H2O2propylene/chloropropylene epoxidation for the production of propylene oxide/epichlorohydrin,and integration of H2O2cyclohexanone ammoximation and membrane separation to innovate the caprolactam production *** review briefly summarizes the whole process from the acquisition of scientific knowledge to the formation of an industrial production technology by ***,the scientific frontiers of H2O2production and related oxidation/ammoximation processes of olefins and analogues are reviewed,and new technological growth points are envisaged,with the aim of maintaining China's standing as a leader in the development of the science and technologies of H2O2production and utilization.

关键词： hydrogen peroxide oxidation ammoximation propylene oxide epichlorohydrin cyclohexanone oxime

来源：评论

学校读者我要写书评

暂无评论

Tailoring interatomic active sites for highly selective electrocatalytic biomass conversion reaction

引用

Chinese Chemical Letters 2025年第4期36卷 37-38页

作者： Xuan Liu Qing Li State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology

The quest for sustainable energy solutions has intensified the search for alternative feedstocks that can supplement or replace fossil fuels. Obtaining fuels or chemicals through the conversion of renewable biomass is a promising candidate [1,2]. Some noblemetal-based (e.g., Pt, Pd and Rh) catalysts exhibit significant catalytic activity to the conversion reaction of these biomass.

关键词： fossil fuels electrocatalytic biomass conversion obtaining fuels alternative feedstocks interatomic active sites sustainable energy solutions conversion renewable biomass conversion reaction

来源：评论

学校读者我要写书评

暂无评论

Activating lithium storage in 2D CaSi_(2) anode via enhancing pseudocapacitive properties with oxygen modification engineering

引用

Nano Research 2025年第4期18卷 199-206页

作者： Yongzheng Zhang Lu Sun Kailin Yang Youwang Ye Liang Zhan Qi Wei Jianan Gu Institute of Energy Power Innovation North China Electric Power UniversityBeijing 100096China State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China State Key Laboratory of Mesoscience and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Aviation Key Laboratory of Science and Technology on Advanced Surface Engineering AVIC Manufacturing Technology InstituteBeijing 100024China

Silicon(Si)has emerged as a promising anode material for lithium-ion batteries(LIBs)due to its extremely high theoretical capacity of 4200 mAh·g^(-1).However,its practical application is limited by several critical challenges,including severe volume expansion and poor electrical ***,we employ a two-dimensional(2D)oxygen modification engineering approach to fabricate 2D oxygen-functionalized CaSi_(2)(CaSi_(2)O_(x))*** the preparation of 2D CaSi_(2) layers,O atoms are gradually incorporated onto their *** resulting 2D CaSi_(2)O_(x) layers have a thickness of 3-5 nm,closely matching the theoretical thickness of 6-10 *** used as lithium anodes,the 2D CaSi_(2)O_(x) layers exhibit exceptional electrochemical performance,maintaining stability over 3000 cycles at an ultrahigh current density of 30 A·g^(-1).By tailoring the surface properties,their pseudocapacitive charge storage mechanism is significantly enhanced,effectively overcoming the intrinsic limitations of traditional Si *** study highlights the promise of 2D surface engineering in the development of advanced materials for next-generation LIBs.

关键词： two-dimensional(2D)CaSi_(2)O_(x) Si anode volume change pseudocapacitive surface modification lithium storage

来源：评论

学校读者我要写书评

暂无评论

Robust fully spin-polarized nodal chain in 3D metal-organic framework

引用

材料科学技术（英文版） 2025年第5期208卷 104-110页

作者： Xiaoyu Wei Ying Liu Lei Jin Cong Liu Xuefang Dai Guodong Liu Xiaoming Zhang State Key Laboratory of Reliability and Intelligence of Electrical Equipment and School of Materials Science and EngineeringHebei University of TechnologyTianjin 300130China

The identification of fully spin-polarized topological phases in magnetic inorganic materials has attracted significant *** this study,through first-principles calculations,we characterize CrCl2(pyz)2,a metal-organic framework(MOF),as a nodal chain *** results reveal a ferromagnetic ground state in this material,presenting as a half-metal with a single spin channel near the Fermi ***-ically,the spin-down states form a nodal chain close to the Fermi level,consisting of three nodal loops protected by glide mirror symmetry on distinct ***,fully spin-polarized drumhead sur-face states corresponding to these nodal loops are identified on the material's ***,we observe the persistence of the fully spin-polarized nodal chain even when tuning the ligand rotation an-gle of the ***,our investigation delves into the influence of spin-orbit coupling(SOC)on the system,revealing that it has minimal impact on the nodal *** robustness of the nodal chain in the presence of SOC underscores its intriguing and resilient nature,indicating its potential utility in various electronic ***,the robust realization of a fully spin-polarized nodal chain in this magnetic MOF system holds promise for applications in the realm of spintronics.

关键词： Topology MOFS Half-metal Fully spin-polarized Nodal chain

来源：评论

学校读者我要写书评

暂无评论

Improvement and correction for transverse emittance diagnosis based on Q-scanning techniques

引用

Nuclear science and Techniques 2025年第3期36卷 1-11页

作者： Yi-Feng Zeng Hao Hu Tong-Ning Hu State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Precise transverse emittance assessment in electron beams is crucial for advancing high-brightness beam *** opposed to intricate methodologies that use specialized devices,quadrupole focusing strength scanning(Q-scanning)techniques offer notable advantages for various injectors owing to their inherent convenience and ***,their stringent approximation conditions lead to inevitable errors in practical operation,thereby limiting their widespread *** study addressed these challenges by revisiting the analytical derivation procedure and investigating the effects of the underlying approximation *** corrections were explored through a combination of data processing analysis and numerical ***,based on theoretical derivations,virtual measurements using beam dynamics calculations were employed to evaluate the correction *** experimental validations were performed at the Huazhong University of science and Technology injector to verify the effectiveness of the proposed compensation *** the virtual and experimental results confirm the feasibility and reliability of the enhanced Q-scanning-based diagnosis for transverse emittance in typical beam injectors operating under common *** the integration of these corrections and compensations,enhanced Q-scanning-based techniques emerge as promising alternatives to traditional emittance diagnosis methods.

关键词： Beam diagnostics Transverse emittance Q-scanning technique Beam injector

来源：评论

学校读者我要写书评

暂无评论

Non-halogenated and polarized solid additives mediating the blend morphologies for efficient organic solar cells

引用

Journal of Energy Chemistry 2025年第4期103卷 458-464页

作者： Yuyao Xu Xinyu He Yangdan Tao Xiukun Ye Hongzheng Chen Chang-Zhi Li State Key Laboratory of Silicon and Advanced Semiconductor Materials Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina

The fine control of active blend morphologies is crucial to achieve efficient and stable organic solar cells(OSCs).Herein,by introducing structurally simple,non-halogenated volatile solid additives,we have demonstrated that the polar 2-naphthonitrile(2-CAN)additives help modulate the kinetics of blend morphological evolution during film *** is revealed that 2-CAN favorably interacted with acceptor moieties,and the transition from presence to absence of additives triggered the arrangement and aggregation of acceptors,hence yielding the ordered molecular stacks in the bulk heterojunction(BHJ)*** blend morphologies with fibril networks were established to improve the excitonic and charge dynamics of active blends,enabling PM6:L8-BO binary OSCs with the promising efficiency of 19.08%(with 2-CAN),which outperformed that of devices with non-polar naphthalene(NA)additives(18.18%)or without additive treatments(17.43%).Meanwhile,non-halogenated 2-CAN exhibited excellent processing features of reproducibility and versatility toward different active blends for fabricating efficient *** 2-CAN-assisted devices with robust transport layers allowed maintaining decent thermal stabilities under continuous 85℃ of thermal ***,this work provides an effective strategy on tuning blend morphologies for efficient organic photovoltaics.

关键词： Organic solar cell Solid additive Morphology Non-halogen

来源：评论

学校读者我要写书评

暂无评论

IMGWOFS: A Feature Selector with Trade-off between Conflict Objectives for EEG-based Emotion Recognition

引用

IEEE Transactions on Affective computing 2024年第2期16卷 1-13页

作者： Luo, Gang Sun, Shuting Yan, Chang Qu, Shanshan Wang, Dixin Chu, Na Liu, Xuesong Tian, Fuze Qian, Kun Li, Xiaowei Hu, Bin Beijing China Gansu Provincial Key Laboratory of Wearable Computing School of Information Science and Engineering Lanzhou University Lanzhou China

Feature selection is a crucial step in EEG emotion recognition. However, it was often used as a single objective problem to either reduce the number of features or maximize classification accuracy, while neglecting their balance. To address the issue, we proposed Improved Multi-objective Grey Wolf Optimization Feature Selection (IMGWOFS). Firstly, we designed a population initialization operator via discriminability and independence of features to accelerate search speed. Secondly, we employed a two-stage update strategy to improve the global search capabilities of the EEG feature subsets. Finally, we incorporated an adaptive mutation operator to escape the local optima. We conducted experiments on SEED and DEAP datasets, and the accuracy were 86.87$\pm$1.62 % and 60.65$\pm$1.51 % in the beta band using a smaller number of EEG features. In addition, the frontal lobe was related to emotion processing. In conclusion, IMGWOFS is an effective and feasible feature selection method for EEG-based emotion recognition. IEEE

关键词： Multiobjective optimization

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：