检索结果-内蒙古大学图书馆

Operando Cooperated Catalytic Mechanism of Atomically Dispersed Cu−N4and Zn−N4for Promoting Oxygen Reduction Reaction

引用

Angewandte Chemie 2021年第25期133卷

作者： Dr. Miaomiao Tong Dr. Fanfei Sun Prof. Ying Xie Dr. Ying Wang Yuqi Yang Prof. Chungui Tian Prof. Lei Wang Prof. Honggang Fu Key Laboratory of Superlight Materials and Surface Technology of the Ministry of Education of the People's Republic of China Harbin Engineering University Harbin 150080 China Shanghai Synchrotron Radiation Facility Zhangjiang Laboratory Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201204 China Key Laboratory of Functional Inorganic Materials Chemistry Ministry of Education of the People's Republic of China Heilongjiang University Harbin 150080 China

Dual-metal single-atom catalysts exhibit superior performance for oxygen reduction reaction (ORR), however, the synergistic catalytic mechanism is not deeply understood. Herein, we report a dual-metal single-atom catalyst consisted of Cu−N 4 and Zn−N 4 on the N-doped carbon support (Cu/Zn−NC). It exhibits high-efficiency ORR activity with an E onset of 0.98 V and an E 1/2 of 0.83 V, excellent stability (no degradation after 10 000 cycles), surpassing state-of-the-art Pt/C and great mass of Pt-free single atom catalysts. Operando XANES demonstrates that the Cu−N 4 as active center experiences the change from atomic dispersion to cluster with the cooperation of Zn−N 4 during ORR process, and then turns to single atom state again after reaction. DFT calculation further indicates that the adjustment effect of Zn on the d-orbital electron distribution of Cu could benefit to the stretch and cleavage of O-O on Cu active center, speeding up the process of rate determining step of OOH*.

关键词： cooperative catalysis dual-metal single atom mechanism operando XANES oxygen reduction reaction

来源：评论

学校读者我要写书评

暂无评论

Type-I superconductivity in Al6Re

arXiv

引用

arXiv 2019年

作者： Peets, Darren C. Cheng, Erjian Ying, Tianping Kriener, Markus Shen, Xiaoping Li, Shiyan Feng, Donglai State Key Laboratory of Surface Physics Department of Physics Advanced Materials Laboratory Fudan University Shanghai200438 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang315201 China Wako351-0198 Japan Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China Hefei National Laboratory for Physical Science Microscale and Department of Physics University of Science and Technology of China Hefei Anhui230026 China

While the pure elements tend to exhibit Type-I rather than Type-II superconductivity, nearly all compound superconductors are Type-II, with only a few known exceptions. We report single crystal growth and physical characterization of the rhenium aluminide Al6Re, which we conclude is a Type-I superconductor based on magnetization, ac-susceptibility, and specific-heat measurements. This detection of superconductivity, despite the strong similarity of Al6Re to a family of W and Mo aluminides that do not superconduct, suggests that these aluminides are an ideal testbed for identifying the relative importance of valence electron count and inversion symmetry in determining whether a material will superconduct. Copyright © 2019, The Authors. All rights reserved.

关键词： Magnetic susceptibility

来源：评论

学校读者我要写书评

暂无评论

Flexible perovskite solar cells based on green,continuous roll-to-roll printing technology

引用

Journal of Energy Chemistry 2018年第4期27卷 971-989页

作者： Wei Zi Zhiwen Jin Shengzhong Liu Baomin Xu Energy-saving Building Materials Innovative Collaboration Center of Henan Province.Xinyang Normal University Xinyang 464000HenanChina Department of Materials Science and Engineering.Southern University of Science and Technology Shenzhen 518055GuangdongChina Dalian Institute of Chemical Physics.Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalian 116023.LiaoningChina Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of EducationShaanxi Engineering Lab for Advanced Energy TednologySchool of Materials Science and EngineeringShaanxi Normal University.Xi'an 710119ShaanxiChina

By designing and fabricating thin film electronic devices on a flexible substrate instead of more commonly used rigid substrate, flexible electronics produced has opened a field of special applications. In this article, we first reviewed available products that may be used as flexible substrates, their characteristics and unique advantages as supporting material for flexible electronic devices. Secondly, flexible perovskite solar cell is examined in detail, with special focus on its potential large-scale fabrication processes. In particular, a comprehensive review is provided on low cost solution printing techniques that is viewed highly as a viable tool for potential commercialization of the perovskite solar cells. Furthermore, a summary is given on green processing for the solution printing production of flexible perovskite devices.

关键词： Flexible substrate Perovskite solar cell Doctor blading Slot-die coating Inkier printing

来源：评论

学校读者我要写书评

暂无评论

An XMCD study of magnetism and valence state in iron-substituted strontium titanate

arXiv

引用

arXiv 2019年

作者： Tang, Astera S. Pelliciari, Jonathan Song, Qi Song, Qian Ning, Shuai Freeland, John W. Comin, Riccardo Ross, Caroline A. Department of Materials Science and Engineering Massachusetts Institute of Technology CambridgeMA02139 United States Department of Physics Massachusetts Institute of Technology CambridgeMA02139 United States State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai200433 China Advanced Photon Source Argonne National Laboratory ArgonneIL60439 United States

Room temperature ferromagnetism was characterized for thin films of SrTi0.6Fe0.4O3-δ grown by pulsed laser deposition on SrTiO3 and Si substrates under different oxygen pressures and after annealing under oxygen and vacuum conditions. X-ray magnetic circular dichroism demonstrated that the magnetization originated from Fe2+ cations, whereas Fe3+ and Ti4+ did not contribute. Films with the highest magnetic moment (0.8 μB per Fe) had the highest measured Fe2+:Fe3+ ratio of 0.1 corresponding to the largest concentration of oxygen vacancies (δ = 0.19). Post-growth annealing treatments under oxidizing and reducing conditions demonstrated quenching and partial recovery of magnetism respectively, and a change in Fe valence states. The study elucidates the microscopic origin of magnetism in highly Fe-substituted SrTi1-xFexO3-δ perovskite oxides and demonstrates that the magnetic moment, which correlates with the relative content of Fe2+ and Fe3+, can be controlled via the oxygen content, either during growth or by post-growth annealing. Copyright © 2019, The Authors. All rights reserved.

关键词： Perovskite

来源：评论

学校读者我要写书评

暂无评论

Room-temperature ferromagnetism and oxygen-vacancy-induced two-dimensional electron gas in BaSnO3

arXiv

引用

arXiv 2020年

作者： Feng, Zexin Qin, Peixin Yang, Yali Yan, Han Guo, Huixin Wang, Xiaoning Zhou, Xiaorong Han, Yuyan Yi, Jiabao Qi, Dongchen Yu, Xiaojiang Breese, Mark B.H. Zhang, Xin Wu, Haojiang Chen, Hongyu Xiang, Hongjun Jiang, Chengbao Liu, Zhiqi School of Materials Science and Engineering Beihang University Beijing100191 China State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai200433 China HefeiAnhui Province230031 China Global Innovative Centre for Advanced Nanomaterials School of Engineering University of Newcastle CallaghanNSW2308 Australia School of Chemistry Physics and Mechanical Engineering Queensland University of Technology BrisbaneQLD4000 Australia Department of Chemistry and Physics La Trobe Institute for Molecular Science La Trobe University MelbourneVIC3086 Australia Singapore Synchrotron Light Source National University of Singapore 5 Research Link Singapore117603 Singapore Department of Physics National University of Singapore Singapore117542 Singapore Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China

The coupling of optical and spintronic degrees of freedom together with quantum confinement in low-dimensional electron systems is particularly interesting for achieving exotic functionalities in strongly correlated oxide electronics. Recently, high room-temperature mobility has been achieved for a large bandgap transparent oxide – BaSnO3 upon extrinsic La or Sb doping, which has excited significant research attention. In this work, we report the observation of room-temperature ferromagnetism in BaSnO3 thin films and the realization of a two-dimensional electron gas (2DEG) on the surface of transparent BaSnO3 via oxygen vacancy creation, which exhibits a high carrier density of ~7.72×1014 cm-2 and a high room-temperature mobility of ~18 cm2·V-1·s-1. Such a 2DEG is rather sensitive to strain and a less than 0.1% in-plane biaxial compressive strain leads to a giant resistance enhancement of ~350% (more than 540 kΩ/΢) at room temperature. Thus, this work creates a new path to exploring the physics of low-dimensional oxide electronics and devices applicable at room temperature. © 2020, CC-BY.

关键词： Degrees of freedom (mechanics)

来源：评论

学校读者我要写书评

暂无评论

Magnetic and electronic properties of single-crystalline BaCoSO

引用

Physical Review B 2019年第20期100卷 205130-205130页

作者： Yuanhe Song Xianshi Liu Dong Wu Qi Yao Chenhaoping Wen Maxim Avdeev Rui Peng Haichao Xu Jin Miao Xia Lou Yifei Fang Binglin Pan Nanlin Wang Darren C. Peets Donglai Feng State Key Laboratory of Surface Physics Department of Physics and Advanced Materials Laboratory Fudan University Shanghai 200438 China International Center for Quantum Materials School of Physics Peking University Beijing 100871 China Australian Nuclear Science and Technology Organisation Lucas Heights NSW 2234 Australia Collaborative Innovation Center of Quantum Matter Beijing 100871 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang 315201 China Hefei National Laboratory for Physical Science at Microscale and Department of Physics University of Science and Technology of China Hefei Anhui 230026 China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China

Doped BaCoSO was recently predicted to be a high-temperature superconductor in a new class based on Co and Ni. Using a Co-S self-flux method, we synthesized single crystals of the antiferromagnetic insulator BaCoSO. Our magnetic and specific heat measurements and neutron diffraction provide details of its magnetic anisotropy and order. Its band gap was determined to be about 1.3 eV by our measurements of its photoemission spectrum and infrared optical conductivity. Our results can pave the way to exploring the predicted superconductivity in this Co-based material.

关键词： Crystal growth Magnetic order Superconductivity Antiferromagnets Cobaltates Angle-resolved photoemission spectroscopy Neutron diffraction Susceptibility measurements

来源：评论

学校读者我要写书评

暂无评论

Recent Advances in Flexible Perovskite Solar Cells: Fabrication and Applications

引用

advanced Materials 2019年第14期131卷 4512-4530页

作者： Yang, Dong Yang, Ruixia Priya, Shashank Liu, Shengzhong Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University 620 West Chang’an Avenue Xi’an710119 China Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian116023 China Materials Science and Engineering Penn State University Park PA16802 United States

Flexible perovskite solar cells have attracted widespread research effort because of their potential in portable electronics. The efficiency has exceeded 18 % owing to the high-quality perovskite film achieved by various low-temperature fabrication methods and matching of the interface and electrode materials. This Review focuses on recent progress in flexible perovskite solar cells concerning low-temperature fabrication methods to improve the properties of perovskite films, such as full coverage, uniform morphology, and good crystallinity;demonstrated interface layers used in flexible perovskite solar cells, considering key figures-of-merit such as high transmittance, high carrier mobility, suitable band gap, and easy fabrication via low-temperature methods;flexible transparent electrode materials developed to enhance the mechanical stability of the devices;mechanical and long-term environmental stability;an outlook of flexible perovskite solar cells in portable electronic devices;and perspectives of commercialization for flexible perovskite solar cells based on cost. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

关键词： Perovskite solar cells

来源：评论

学校读者我要写书评

暂无评论

Chemical Bath Deposition of Co-Doped TiO₂ Electron Transport Layer for Hysteresis-Suppressed High-Efficiency Planar Perovskite Solar Cells

引用

Solar RRL 2019年第9期3卷

作者： Ren, Xiaodong Xie, Lin Kim, Won Bin Lee, Dong Geon Jung, Hyun Suk Liu, Shengzhong Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China School of Advanced Materials Science & Engineering Sungkyunkwan University Suwon 440-746 South Korea School of Chemical Engineering Sungkyunkwan University Suwon 440-746 South Korea Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

Planar hybrid perovskite solar cells (PSCs) attract great attention due to their obvious advantages of low-temperature processing with a high power conversion efficiency (PCE) up to 23.32%. Here, Co-doped TiO₂ (Co-TiO₂) deposited by a straightforward low-temperature chemical bath deposition (CBD) method is explored. Using Co-TiO₂ as an electron transport layer (ETL) for the planar PSCs, the effects of doping on TiO₂ morphology, electronic properties, and solar cell performance are investigated. The PCE increases to 19.10% when the Co doping concentration is optimized at 5 mol%, an increase of 17.40% compared with that using the pristine TiO₂. Meanwhile, the notorious J–V hysteresis is suppressed to a greater extent. Considering that the low-temperature CBD is comparable with continuous roll-to-roll processing, it makes the process and the Co-TiO₂ ETL potential candidates for low-cost commercialization. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

关键词： chemical bath deposition doping perovskite solar cells TiO2

来源：评论

学校读者我要写书评

暂无评论

Heterointerface engineering for enhancing the electrochemical performance of solid oxide cells

引用

Energy & Environmental Science 2019年第1期13卷 53-85页

作者： Chenhuan Zhao Yifeng Li Wenqiang Zhang Yun Zheng Xiaoming Lou Bo Yu Jing Chen Yan Chen Meilin Liu Jianchen Wang Institute of Nuclear and New Energy Technology (INET) Collaborative Innovation Center of Advanced Nuclear Energy Technology Tsinghua University 30 Shuang’qing Road Beijing 100084 P. R. China Department of Chemical Engineering University of Waterloo Waterloo ON Canada Guangzhou Key Laboratory for Surface Chemistry of Energy Materials New Energy Institute School of Environment and Energy South China University of Technology Guangzhou 510006 China School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332-0245 USA

Solid oxide cells (SOCs) have the potential to be the most efficient energy storage and conversion systems. To minimize energy loss due to charge and mass transport associated with the operation of SOC systems at intermediate temperatures, electrodes and electrolytes containing different types of heterointerfaces have been designed, fabricated, and tested under various conditions. While heterointerfaces can significantly enhance not only the ionic and/or electronic conductivity but also the electrocatalytic activity and stability of SOC components, as predicted by theoretical calculations and demonstrated by experimental results, the mechanisms of these enhancements are yet to be fully understood. In this review, we start with an overview of the techniques for fabrication of heterointerfaces with controlled composition, structure, and morphology. Then, the latest developments in performance enhancement of SOCs with heterointerfaces are summarized, including boosting the ionic conductivity of heterostructured electrolytes (oxygen ion conductors and proton conductors) and increasing the electrocatalytic activity and durability of heterostructured electrodes (oxygen electrodes and fuel electrodes). Subsequently, we will highlight the unique attributes of heterointerfaces in the enhancement of the SOC performance and provide important insights into the mechanisms of performance enhancement in order to establish the scientific basis for rational design of better electrolyte and electrode materials. Finally, the remaining challenges in design and fabrication of novel materials for advanced solid-state electrochemical systems will be discussed, together with possible strategies to overcome these critical issues, new research directions, and future perspectives.

关键词：

来源：评论

学校读者我要写书评

暂无评论

CuInGaSe 2 thin-film solar cells with 11.5% efficiency: An effective and low-cost way of Na-incorporation for grain-growth

引用

Solar Energy 2019年 185卷 34-40页

作者： Xin-Shou Wang Qing-Miao Fan Qing-Wen Tian Zheng-Ji Zhou Dong-Xing Kou Wen-Hui Zhou Qing-Bo Meng Zhi Zheng Si-Xin Wu The Key Laboratory for Special Functional Materials of MOE School of Materials Science and Engineering National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology Collaborative Innovation Center of Nano Functional Materials and Applications Henan University Kaifeng 475004 China Henan University Minsheng College Kaifeng 475004 China Key Laboratory for Renewable Energy of CAS Institute of Physics Chinese Academy of Sciences Beijing 100190 China College of Advanced Materials and Energy Institute of Surface Micro and Nano Materials Xuchang University Xuchang 461000 China

Cu(In,Ga)Se 2 (CIGSe) based solar cells have received considerable interests because they have reached the commercialization stage. High efficiency CIGSe based solar cells are often fabricated via post deposition treatment (PDT) with alkali metal element incorporation. In this work, we present an effective and low-cost way of Na-incorporation for photoelectric conversion efficiencies (PCE) promotion of CIGSe solar cells. Soda-lime glass (SLG) was used as both substrate and cover during the PDT procedure for Na doping. The effects of different substrate and cover on the grain size and phase composition of CIGSe films were studied in detail. The Na- incorporation from SLG significantly improved the grain growth, charge carrier density and V oc of CIGSe solar cells. At last, a best 11.53% PCE CIGSe solar cell was achieved at optimal condition.

关键词：

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：