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Wang B, Yao Y, Hong W, Hong Z, He X, Wang T, Jian C, Ju Q, Cai Q, Sun Z, Liu W. The Controllable Synthesis of High-Quality Two-Dimensional Iron Sulfide with Specific Phases. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2207325. [PMID: 36919484 DOI: 10.1002/smll.202207325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 02/20/2023] [Indexed: 06/08/2023]
Abstract
2D Fe-chalcogenides have drawn significant attention due to their unique structural phases and distinct properties in exploring magnetism and superconductivity. However, it remains a significant challenge to synthesize 2D Fe-chalcogenides with specific phases in a controllable manner since Fe-chalcogenides have multiple phases. Herein, a molecular sieve-assisted strategy is reported for synthesizing ultrathin 2D iron sulfide on substrates via the chemical vapor deposition method. Using a molecular sieve and tuning growth temperatures to control the partial pressures of precursor concentrations, hexagonal FeS, tetragonal FeS, and non-stoichiometric Fe7 S8 nanoflakes can be precisely synthesized. The 2D h-FeS, t-FeS, and Fe7 S8 have high conductivities of 5.4 × 105 S m-1 , 5.8 × 105 S m-1 , and 1.9 × 106 S m-1 . 2D tetragonal FeS shows a superconducting transition at 4 K. The spin reorientation at ≈30 K on the non-stoichiometric Fe7 S8 nanoflakes with ferrimagnetism up to room temperature has also been observed. The controllable synthesis of various phases of 2D iron sulfide may provide a route for synthesizing other 2D compounds with various phases.
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Affiliation(s)
- Bicheng Wang
- College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
| | - Yu Yao
- College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
| | - Wenting Hong
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
| | - Zhaoan Hong
- College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
| | - Xu He
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
| | - Taiku Wang
- College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
| | - Chuanyong Jian
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
| | - Qiankun Ju
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
| | - Qian Cai
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
| | - Zhihua Sun
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian, 350108, P. R. China
| | - Wei Liu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian, 350108, P. R. China
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Di J, Hao G, Liu G, Zhou J, Jiang W, Liu Z. Defective materials for CO2 photoreduction: From C1 to C2+ products. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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3
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Xiao Y, Xiong C, Chen MM, Wang S, Fu L, Zhang X. Structure modulation of two-dimensional transition metal chalcogenides: recent advances in methodology, mechanism and applications. Chem Soc Rev 2023; 52:1215-1272. [PMID: 36601686 DOI: 10.1039/d1cs01016f] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Together with the development of two-dimensional (2D) materials, transition metal dichalcogenides (TMDs) have become one of the most popular series of model materials for fundamental sciences and practical applications. Due to the ever-growing requirements of customization and multi-function, dozens of modulated structures have been introduced in TMDs. In this review, we present a systematic and comprehensive overview of the structure modulation of TMDs, including point, linear and out-of-plane structures, following and updating the conventional classification for silicon and related bulk semiconductors. In particular, we focus on the structural characteristics of modulated TMD structures and analyse the corresponding root causes. We also summarize the recent progress in modulating methods, mechanisms, properties and applications based on modulated TMD structures. Finally, we demonstrate challenges and prospects in the structure modulation of TMDs and forecast potential directions about what and how breakthroughs can be achieved.
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Affiliation(s)
- Yao Xiao
- Collaborative Innovation Centre for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China.
| | - Chengyi Xiong
- Collaborative Innovation Centre for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China.
| | - Miao-Miao Chen
- Collaborative Innovation Centre for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China.
| | - Shengfu Wang
- Collaborative Innovation Centre for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China.
| | - Lei Fu
- The Institute for Advanced Studies (IAS), Wuhan University, Wuhan 430072, P. R. China. .,College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China.
| | - Xiuhua Zhang
- Collaborative Innovation Centre for Advanced Organic Chemical Materials Co-Constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China.
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Yu C, Li X, Li X, Yang J. High Curie Temperature and Intrinsic Ferromagnetic Half-Metallicity in Mn 2X 3 (X = S, Se, Te) Nanosheets. J Phys Chem Lett 2021; 12:11790-11794. [PMID: 34860522 DOI: 10.1021/acs.jpclett.1c03444] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Two-dimensional (2D) intrinsic half-metallic materials with room-temperature ferromagnetism, sizable magnetic anisotropy energy (MAE), and wide half-metallic gap are excellent candidates for pure spin generation, injection, and transport in nanospintronic applications. However, until now, such 2D half metallicity has been rarely observed in experiment. In this work, by using first-principles calculations, we design a series of such materials, namely, Mn2X3 (X = S, Se, Te) nanosheets, which could be obtained by controlling the thickness of synthesized α-MnX(111) nanofilm to a quintuple X-Mn-X-Mn-X layer. All these nanosheets are dynamically and thermally stable. Electronic and magnetic studies reveal they are intrinsic half metals with high Curie temperatures between 718 and 820 K, sizable MAEs with -1.843 meV/Mn for Mn2Te3 nanosheet, and wide half-metallic gaps from 1.55 to 1.94 eV. Above all, the outstanding features of Mn2X3 nanosheets make them promising in fabricating nanospintronic devices working at room temperature.
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Affiliation(s)
- Cuiju Yu
- Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiangyang Li
- Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xingxing Li
- Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jinlong Yang
- Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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5
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Fan C, Shen X, Cheng J, Lang L, Liu G, Ji Z, Zhu G. One-pot synthesis of Ni3S2/Co3S4/FeOOH flower-like microspheres on Ni foam: An efficient binder-free bifunctional electrode towards overall water splitting. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127689] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Liu Y, Guo Y, Wu C, Xie Y. Spin-Dependent Transport at 2D Solids: From Nonmagnetic Layers to Ferromagnetic van der Waals Structures. J Phys Chem Lett 2021; 12:9730-9740. [PMID: 34590853 DOI: 10.1021/acs.jpclett.1c02047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Spintronics is a promising alternative to the conventional silicon transistor-based electronics that are gradually approaching their physical limitations. Ultrathin two-dimensional van der Waals (vdW) materials (2D materials) with controllable spin degrees of freedom are recognized as extremely promising spintronic materials in architectures for the post-Moore era. In this Perspective, we review recent progress on spin-dependent transport behaviors (SDTBs) confined at the 2D scale, which are the mainstream paradigms for spintronic devices. We first present the mechanism and the key factors of SDTBs in 2D nonmagnetic materials-based hybrid devices. Then, some chemical modulation strategies for inducing short-range magnetic order and magneto-electric performance into 2D nonmagnetic materials are discussed. Furthermore, we concentrate on introducing intriguing SDTBs in 2D long-range ferromagnetic materials-based vdW devices. Finally, we highlight the current challenges in the study of spin-dependent transport of 2D modified materials and 2D material-based spintronic devices, in the hope of accelerating their applications.
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Affiliation(s)
- Yang Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230026, P.R. China
| | - Yuqiao Guo
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230026, P.R. China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, P.R. China
| | - Changzheng Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230026, P.R. China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, P.R. China
| | - Yi Xie
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230026, P.R. China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, P.R. China
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7
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Xia B, Gao D, Xue D. Ferromagnetism of two-dimensional transition metal chalcogenides: both theoretical and experimental investigations. NANOSCALE 2021; 13:12772-12787. [PMID: 34477766 DOI: 10.1039/d1nr02967c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In recent years, with the fast development of integrated circuit electronic devices and technologies, it has become urgent to improve the density of data storage and lower the energy losses of devices. Under these circumstances, two-dimensional (2D) materials, which have a smaller size and lower energy loss compared with bulk materials, are becoming ideal candidates for future spintronic devices. Among them, 2D transition metal chalcogenides (TMCs), which have excellent electronic and optical properties, have attracted great attention from researchers. However, most of them are intrinsically non-magnetic, which severely hinders their further applications in spintronics. Therefore, introducing intrinsic room-temperature ferromagnetism into 2D TMC materials has become an important issue in spintronics. In this work, we review the introduction of intrinsic ferromagnetism into typical 2D TMCs using various strategies, such as defect engineering, doping with transition metal elements, and phase transfer. Additionally, we found that their ferromagnetism could be adjusted via changing the experimental conditions, such as the nucleation temperature, ion irradiation dose, doping amount, and phase ratio. Finally, we provide some insight into prospective solutions for introducing ferromagnetism into 2D TMCs, hoping to shed some light on future spintronics development.
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Affiliation(s)
- Baorui Xia
- Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, 730000, Lanzhou, China.
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8
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Shen M, Zhang L, Shi J. Defect Engineering of Photocatalysts towards Elevated CO 2 Reduction Performance. CHEMSUSCHEM 2021; 14:2635-2654. [PMID: 33872463 DOI: 10.1002/cssc.202100677] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/17/2021] [Indexed: 06/12/2023]
Abstract
Photocatalytic CO2 reduction provides a promising solution to address the crises of massive CO2 emissions and fossil energy shortages. As one of the most effective strategies to promote CO2 photoconversion, defect engineering shows great potential in modulating the electronic structure and light absorption properties of photocatalysts while increasing surface active sites for CO2 activation and conversion. This Review summarizes the recent progress in defect engineering of photocatalysts to promote CO2 reduction performances from the following four aspects: 1) Approaches to defect (mainly vacancy and dopant) generation in photocatalysts; 2) defect structure characterization techniques; 3) physical and chemical properties of defect-engineered photocatalysts; 4) CO2 reduction performance enhancements in activity, selectivity, and stability of photocatalysts by defect engineering. This Review is expected to present readers with a comprehensive view of progress in the field of photocatalytic CO2 reduction through defect engineering for elevated CO2 -to-fuels conversion efficiency.
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Affiliation(s)
- Meng Shen
- The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Yuquanlu, 19 A, Beijing, 100049, P. R. China
| | - Lingxia Zhang
- The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Yuquanlu, 19 A, Beijing, 100049, P. R. China
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou, 310024, P. R. China
| | - Jianlin Shi
- The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Yuquanlu, 19 A, Beijing, 100049, P. R. China
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9
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Xu C, Zhang J, Guo Z, Zhang S, Yuan X, Wang L. A first-principles study on the electronic property and magnetic anisotropy of ferromagnetic CrOF and CrOCl monolayers. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:195804. [PMID: 33561851 DOI: 10.1088/1361-648x/abe477] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Accepted: 02/09/2021] [Indexed: 06/12/2023]
Abstract
Two-dimensional ferromagnetic materials with large perpendicular magnetic anisotropy (PMA) hold great potential in realizing low critical switching current, high thermal stability and high density nonvolatile storage in magnetic random-access memories. Our first-principles calculations reveal that CrOF and CrOCl monolayers (MLs) are two-dimensional (2D) ferromagnetic semiconductors with out-of-plane magnetic easy axis, and PMAs of CrOF and CrOCl MLs are mainly contributed by Cr atoms. The magnetic anisotropy of CrOF and CrOCl MLs can be controlled and enhanced by applying biaxial strain. Tensile strain can further enhance PMAs of CrOF and CrOCl MLs by 82.9% and 161.0% higher than those of unstrained systems, respectively. In addition, appropriate compressive strain can switch the magnetic easy axis of CrOF and CrOCl MLs from out-of-plane direction to in-plane direction. The semiconductor natures of CrOF and CrOCl MLs robust against biaxial strain, the band gaps of these systems under biaxial strain are in the range of 1.26 eV to 2.40 eV. By applying biaxial strain, the Curie temperatures of CrOF and CrOCl MLs increase up to 282 K and 163 K, respectively. These tunable properties suggest that CrOF and CrOCl MLs have great application potentials for magnetic data storage.
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Affiliation(s)
- Chunyan Xu
- Institute for Interdisciplinary Quantum Information Technology, Jilin Engineering Normal University, Jilin Engineering Laboratory for Quantum Information Technology, Changchun 130052, People's Republic of China
| | - Jing Zhang
- Institute for Interdisciplinary Quantum Information Technology, Jilin Engineering Normal University, Jilin Engineering Laboratory for Quantum Information Technology, Changchun 130052, People's Republic of China
| | - Zexuan Guo
- Institute for Interdisciplinary Quantum Information Technology, Jilin Engineering Normal University, Jilin Engineering Laboratory for Quantum Information Technology, Changchun 130052, People's Republic of China
| | - Siqi Zhang
- Institute for Interdisciplinary Quantum Information Technology, Jilin Engineering Normal University, Jilin Engineering Laboratory for Quantum Information Technology, Changchun 130052, People's Republic of China
| | - Xiaoxi Yuan
- Institute for Interdisciplinary Quantum Information Technology, Jilin Engineering Normal University, Jilin Engineering Laboratory for Quantum Information Technology, Changchun 130052, People's Republic of China
| | - Lingrui Wang
- Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, People's Republic of China
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Wang M, Dong X, Meng Z, Hu Z, Lin Y, Peng C, Wang H, Pao C, Ding S, Li Y, Shao Q, Huang X. An Efficient Interfacial Synthesis of Two‐Dimensional Metal–Organic Framework Nanosheets for Electrochemical Hydrogen Peroxide Production. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100897] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Mengjun Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Xu Dong
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Jiangsu 215123 China
| | - Zhaodong Meng
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Zhiwei Hu
- Max-Planck-Institute for Chemical Physics of Solids Nöthnitzer Street 40 01187 Dresden Germany
| | - Yan‐Gu Lin
- National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan
| | - Chun‐Kuo Peng
- National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan
- Department of Materials Science and Engineering National Chiao Tung University Hsinchu 30010 Taiwan
| | - Hongshuai Wang
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Jiangsu 215123 China
| | - Chih‐Wen Pao
- National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan
| | - Songyuan Ding
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Youyong Li
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Jiangsu 215123 China
- Macao Institute of Materials Science and Engineering Macau University of Science and Technology Taipa 999078 Macau SAR China
| | - Qi Shao
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Jiangsu 215123 China
| | - Xiaoqing Huang
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
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11
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Wang M, Dong X, Meng Z, Hu Z, Lin YG, Peng CK, Wang H, Pao CW, Ding S, Li Y, Shao Q, Huang X. An Efficient Interfacial Synthesis of Two-Dimensional Metal-Organic Framework Nanosheets for Electrochemical Hydrogen Peroxide Production. Angew Chem Int Ed Engl 2021; 60:11190-11195. [PMID: 33694245 DOI: 10.1002/anie.202100897] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/05/2021] [Indexed: 11/07/2022]
Abstract
Two-dimensional (2D) metal-organic framework nanosheets (MOF NSs) play a vital role in catalysis, but the most preparation is ultrasonication or solvothermal. Herein, a liquid-liquid interfacial synthesis method has been developed for the efficient fabrication of a series of 2D Ni MOF NSs. The active sites could be modulated by readily tuning the ratios of metal precursors and organic linkers (RM/L ). The Ni MOF NSs display highly RM/L dependent activities towards 2e oxygen reduction reaction (ORR) to hydrogen peroxide (H2 O2 ), where the Ni MOF NSs with the RM/L of 6 exhibit the optimal near-zero overpotential, ca. 98 % H2 O2 selectivity and production rate of ca. 80 mmol gcat -1 h-1 in 0.1 M KOH. As evidenced by X-ray absorption fine structure spectroscopy, the coordination environment of active sites changed from saturation to unsaturation, and the partially unsaturated metal atoms are crucial to create optimal sites for enhancing the electrocatalysis.
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Affiliation(s)
- Mengjun Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Xu Dong
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu, 215123, China
| | - Zhaodong Meng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Zhiwei Hu
- Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Street 40, 01187, Dresden, Germany
| | - Yan-Gu Lin
- National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan
| | - Chun-Kuo Peng
- National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan.,Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, 30010, Taiwan
| | - Hongshuai Wang
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Jiangsu, 215123, China
| | - Chih-Wen Pao
- National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan
| | - Songyuan Ding
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Youyong Li
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Jiangsu, 215123, China.,Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa, 999078, Macau SAR, China
| | - Qi Shao
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu, 215123, China
| | - Xiaoqing Huang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
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12
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Li Z, Wu Q, Wu C. Surface/Interface Chemistry Engineering of Correlated-Electron Materials: From Conducting Solids, Phase Transitions to External-Field Response. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2002807. [PMID: 33643796 PMCID: PMC7887576 DOI: 10.1002/advs.202002807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/25/2020] [Indexed: 06/12/2023]
Abstract
Correlated electronic materials (CEMs) with strong electron-electron interactions are often associated with exotic properties, such as metal-insulator transition (MIT), charge density wave (CDW), superconductivity, and magnetoresistance (MR), which are fundamental to next generation condensed matter research and electronic devices. When the dimension of CEMs decreases, exposing extremely high specific surface area and enhancing electronic correlation, the surface states are equally important to the bulk phase. Therefore, surface/interface chemical interactions provide an alternative route to regulate the intrinsic properties of low-dimensional CEMs. Here, recent achievements in surface/interface chemistry engineering of low-dimensional CEMs are reviewed, using surface modification, molecule-solid interaction, and interface electronic coupling, toward modulation of conducting solids, phase transitions including MIT, CDW, superconductivity, and magnetism transition, as well as external-field response. Surface/interface chemistry engineering provides a promising strategy for exploring novel properties and functional applications in low-dimensional CEMs. Finally, the current challenge and outlook of the surface/interface engineering are also pointed out for future research development.
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Affiliation(s)
- Zejun Li
- Hefei National Laboratory for Physical Sciences at the MicroscaleCAS center for Excellence in Nanoscienceand CAS Key Laboratory of Mechanical Behavior and Design of MaterialsUniversity of Science and Technology of ChinaHefeiAnhui230026PR China
| | - Qiran Wu
- Hefei National Laboratory for Physical Sciences at the MicroscaleCAS center for Excellence in Nanoscienceand CAS Key Laboratory of Mechanical Behavior and Design of MaterialsUniversity of Science and Technology of ChinaHefeiAnhui230026PR China
| | - Changzheng Wu
- Hefei National Laboratory for Physical Sciences at the MicroscaleCAS center for Excellence in Nanoscienceand CAS Key Laboratory of Mechanical Behavior and Design of MaterialsUniversity of Science and Technology of ChinaHefeiAnhui230026PR China
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13
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Li W, Huang J, Han B, Xie C, Huang X, Tian K, Zeng Y, Zhao Z, Gao P, Zhang Y, Yang T, Zhang Z, Sun S, Hou Y. Molten-Salt-Assisted Chemical Vapor Deposition Process for Substitutional Doping of Monolayer MoS 2 and Effectively Altering the Electronic Structure and Phononic Properties. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2001080. [PMID: 32832362 PMCID: PMC7435234 DOI: 10.1002/advs.202001080] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 05/16/2020] [Indexed: 05/26/2023]
Abstract
Substitutional doping of layered transition metal dichalcogenides (TMDs) has been proved to be an effective route to alter their intrinsic properties and achieve tunable bandgap, electrical conductivity and magnetism, thus greatly broadening their applications. However, achieving valid substitutional doping of TMDs remains a great challenge to date. Herein, a distinctive molten-salt-assisted chemical vapor deposition (MACVD) method is developed to match the volatilization of the dopants perfectly with the growth process of monolayer MoS2, realizing the substitutional doping of transition metal Fe, Co, and Mn. This doping strategy effectively alters the electronic structure and phononic properties of the pristine MoS2. In addition, a temperature-dependent Raman spectrum is employed to explore the effect of dopants on the lattice dynamics and first-order temperature coefficient of monolayer MoS2, and this doping effect is illustrated in depth combined with the theoretical calculation. This work provides an intriguing and powerful doping strategy for TMDs through employing molten salt in the CVD system, paving the way for exploring new properties of 2D TMDs and extending their applications into spintronics, catalytic chemistry and photoelectric devices.
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Affiliation(s)
- Wei Li
- Department of Materials Science and Engineering, College of Engineering Peking University Beijing 100871 China
- Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKL-MMD) Beijing Innovation Center for Engineering Science and Advanced Technology (BIC-ESAT) Beijing 100871 China
| | - Jianqi Huang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China
| | - Bo Han
- Electron Microscopy Laboratory and International Center for Quantum Materials, School of Physics Peking University Beijing 100871 China
| | - Chunyu Xie
- Department of Materials Science and Engineering, College of Engineering Peking University Beijing 100871 China
| | - Xiaoxiao Huang
- Department of Materials Science and Engineering, College of Engineering Peking University Beijing 100871 China
- Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKL-MMD) Beijing Innovation Center for Engineering Science and Advanced Technology (BIC-ESAT) Beijing 100871 China
| | - Kesong Tian
- Department of Materials Science and Engineering, College of Engineering Peking University Beijing 100871 China
- Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKL-MMD) Beijing Innovation Center for Engineering Science and Advanced Technology (BIC-ESAT) Beijing 100871 China
| | - Yi Zeng
- Department of Materials Science and Engineering, College of Engineering Peking University Beijing 100871 China
- Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKL-MMD) Beijing Innovation Center for Engineering Science and Advanced Technology (BIC-ESAT) Beijing 100871 China
| | - Zijing Zhao
- Department of Materials Science and Engineering, College of Engineering Peking University Beijing 100871 China
- Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKL-MMD) Beijing Innovation Center for Engineering Science and Advanced Technology (BIC-ESAT) Beijing 100871 China
| | - Peng Gao
- Electron Microscopy Laboratory and International Center for Quantum Materials, School of Physics Peking University Beijing 100871 China
- Collaborative Innovation Center of Quantum Matter Beijing 100871 China
| | - Yanfeng Zhang
- Department of Materials Science and Engineering, College of Engineering Peking University Beijing 100871 China
| | - Teng Yang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China
| | - Zhidong Zhang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China
| | - Shengnan Sun
- Department of Materials Science and Engineering, College of Engineering Peking University Beijing 100871 China
- Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKL-MMD) Beijing Innovation Center for Engineering Science and Advanced Technology (BIC-ESAT) Beijing 100871 China
| | - Yanglong Hou
- Department of Materials Science and Engineering, College of Engineering Peking University Beijing 100871 China
- Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKL-MMD) Beijing Innovation Center for Engineering Science and Advanced Technology (BIC-ESAT) Beijing 100871 China
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14
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Li Z, Zhang X, Zhao X, Li J, Herng TS, Xu H, Lin F, Lyu P, Peng X, Yu W, Hai X, Chen C, Yang H, Martin J, Lu J, Luo X, Castro Neto AH, Pennycook SJ, Ding J, Feng Y, Lu J. Imprinting Ferromagnetism and Superconductivity in Single Atomic Layers of Molecular Superlattices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1907645. [PMID: 32419256 DOI: 10.1002/adma.201907645] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 04/08/2020] [Accepted: 04/23/2020] [Indexed: 06/11/2023]
Abstract
Ferromagnetism and superconductivity are two antagonistic phenomena since ferromagnetic exchange fields tend to destroy singlet Cooper pairs. Reconciliation of these two competing phases has been achieved in vertically stacked heterostructures where these two orders are confined in different layers. However, controllable integration of these two phases in one atomic layer is a longstanding challenge. Here, an interlayer-space-confined chemical design (ICCD) is reported for the synthesis of dilute single-atom-doped TaS2 molecular superlattice, whereby ferromagnetism is observed in the superconducting TaS2 layers. The intercalation of 2H-TaS2 crystal with bulky organic ammonium molecule expands its van der Waals gap for single-atom doping via co-intercalated cobalt ions, resulting in the formation of quasi-monolayer Co-doped TaS2 superlattices. Isolated Co atoms are decorated in the basal plane of the TaS2 via substituting the Ta atom or anchoring at a hollow site, wherein the orbital-selected p-d hybridization between Co and neighboring Ta and S atoms induces local magnetic moments with strong ferromagnetic coupling. This ICCD approach can be applied to various metal ions, enabling the synthesis of a series of crystal-size TaS2 molecular superlattices.
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Affiliation(s)
- Zejun Li
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Xiuying Zhang
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore, 117546, Singapore
- State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing, 100871, P. R. China
| | - Xiaoxu Zhao
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - Jing Li
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Tun Seng Herng
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - Haomin Xu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Fanrong Lin
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
| | - Pin Lyu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Xinnan Peng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Wei Yu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Xiao Hai
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Cheng Chen
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Huimin Yang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Jens Martin
- Institut für Kristallzüchtung, Max-Born-Str. 2, Berlin, 12489, Germany
| | - Jing Lu
- State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing, 100871, P. R. China
| | - Xin Luo
- School of Physics, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - A H Castro Neto
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore, 117546, Singapore
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
| | - Stephen J Pennycook
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - Jun Ding
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117575, Singapore
| | - Yuanping Feng
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore, 117546, Singapore
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
| | - Jiong Lu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, Singapore, 117546, Singapore
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15
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Liang Q, Zhang Q, Gou J, Song T, Chen H, Yang M, Lim SX, Wang Q, Zhu R, Yakovlev N, Tan SC, Zhang W, Novoselov KS, Wee ATS. Performance Improvement by Ozone Treatment of 2D PdSe 2. ACS NANO 2020; 14:5668-5677. [PMID: 32364379 DOI: 10.1021/acsnano.0c00180] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Atomic-scale defects in two-dimensional transition metal dichalcogenides (TMDs) often dominate their physical and chemical properties. Introducing defects in a controllable manner can tailor properties of TMDs. For example, chalcogen atom defects in TMDs were reported to trigger phase transition, induce ferromagnetism, and drive superconductivity. However, reported strategies to induce chalcogen atom defects including postgrowth annealing, laser irradiation, or plasma usually require high temperature (such as 500 °C) or cause unwanted structural damage. Here, we demonstrate low-temperature (60 °C) partial surface oxidation in 2D PdSe2 with low disorder and good stability. The combination of scanning tunneling microscopy, X-ray photoelectron spectroscopy, and density functional theory calculations provide evidence of atomic-scale partial oxidation with both atomic resolution and chemical sensitivity. We also experimentally demonstrate that this controllable oxygen incorporation effectively tailors the electronic, optoelectronic, and catalytic activity of PdSe2. This work provides a pathway toward fine-tuning the physical and chemical properties of 2D TMDs and their applications in nanoelectronics, optoelectronics, and electrocatalysis.
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Affiliation(s)
- Qijie Liang
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, People's Republic of China
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
| | - Qian Zhang
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore
| | - Jian Gou
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
| | - Tingting Song
- College of Physics and Space Science, China West Normal University, Nanchong 637002, China
| | - Hao Chen
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
| | - Ming Yang
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634, Singapore
| | - Sharon Xiaodai Lim
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
| | - Qixing Wang
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
| | - Rui Zhu
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
| | - Nikolai Yakovlev
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634, Singapore
| | - Swee Ching Tan
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore
| | - Wenjing Zhang
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, People's Republic of China
| | - Kostya S Novoselov
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore
| | - Andrew T S Wee
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
- Centre for Advanced 2D Materials, National University of Singapore, Block S14, 6 Science Drive 2, Singapore 117546, Singapore
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16
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Wang P, Niu Y, Cao W, Zhang Y, Zhang M. First-Principles Study of the Effect of Native Defects on Spin Polarization and Exchange Coupling Interaction in Semimetal V 3O 4. ACS OMEGA 2020; 5:9442-9447. [PMID: 32363296 PMCID: PMC7191853 DOI: 10.1021/acsomega.0c00607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 04/08/2020] [Indexed: 06/11/2023]
Abstract
We use first-principles calculations to investigate the mechanism of the effect of native defects on the spin polarization and exchange coupling interaction in the V3O4 semimetal material. Our results reveal that, in contrast to other neutral defects, V vacancy defects in V3O4 at A/B sites are in favor of higher spin polarization degrees and lower defect formation energies. Compared to ideal V3O4, the V vacancy defects at A/B sites cause slightly lower spin polarization degrees but much higher exchange coupling interactions. Our results suggest an effective route to mediate the spin polarization and exchange coupling by defect engineering, which promotes the applications of the V3O4 semimetal material in spintronics.
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Affiliation(s)
- Pan Wang
- Research
Center for Semiconductor Materials and Devices, Shaanxi University of Science and Technology, Xiʼan 710021, China
| | - Yong Niu
- Research
Center for Semiconductor Materials and Devices, Shaanxi University of Science and Technology, Xiʼan 710021, China
| | - Wenbin Cao
- Research
Center for Semiconductor Materials and Devices, Shaanxi University of Science and Technology, Xiʼan 710021, China
| | - Yunxia Zhang
- Research
Center for Semiconductor Materials and Devices, Shaanxi University of Science and Technology, Xiʼan 710021, China
| | - Mingzhe Zhang
- State
Key Laboratory of Superhard Materials, Jilin
University, Changchun 130012, China
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17
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Zhang Y, He X, Sun M, Wang J, Ghosez P. Switchable metal-to-half-metal transition at the semi-hydrogenated graphene/ferroelectric interface. NANOSCALE 2020; 12:5067-5074. [PMID: 32068214 DOI: 10.1039/c9nr08627g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Tuning the half-metallicity of low-dimensional materials using an electric field is particularly appealing for spintronic applications but typically requires an ultra-high field, hampering practical applications. Interface engineering has been suggested as an alternative practical means to overcome this limitation and control the metal-to-half-metal transition. Here, we show from first-principles calculations that the polarization switching at the interface of semi-hydrogenated graphene (i.e., graphone) and a ferroelectric PbTiO3 layer can reversibly tune a metal to half-metal transition in graphone. Using a simple Hubbard model, this is rationalized using interface atomic orbital hybridization, which also reveals the origin of the high-quality screening of metallic graphone, preserving bulk-like stable ferroelectric polarization in the PbTiO3 film down to a thickness of two unit cells. These findings do not only open a new perspective on engineering half-metallicity at the interface of two-dimensional materials and ferroelectrics, but also identify graphone as a powerful atomically thin electrode, which holds great promise for the design of ultrafast and high integration density information-storage devices.
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Affiliation(s)
- Yajun Zhang
- Department of Engineering Mechanics & Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China. and Theoretical Materials Physics, Q-MAT, CESAM, University of Liège, B-4000 Liège, Belgium.
| | - Xu He
- Theoretical Materials Physics, Q-MAT, CESAM, University of Liège, B-4000 Liège, Belgium.
| | - Minglei Sun
- School of Materials Science and Engineering, Southeast University, Nanjing, Jiangsu 211189, China.
| | - Jie Wang
- Department of Engineering Mechanics & Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
| | - Philippe Ghosez
- Theoretical Materials Physics, Q-MAT, CESAM, University of Liège, B-4000 Liège, Belgium.
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18
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Zhang Z, Dong Y, Sun H, Liu G, Liu S, Yang X. Defect-rich 2D reticulated MoS2 monolayers: Facile hydrothermal preparation and marvellous photoelectric properties. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.04.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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19
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Zheng S, Huang C, Yu T, Xu M, Zhang S, Xu H, Liu Y, Kan E, Wang Y, Yang G. High-Temperature Ferromagnetism in an Fe 3P Monolayer with a Large Magnetic Anisotropy. J Phys Chem Lett 2019; 10:2733-2738. [PMID: 31066565 DOI: 10.1021/acs.jpclett.9b00970] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
For the development of high-performance spintronic nanodevices, one of the most urgent and challenging tasks is the preparation of two-dimensional materials with room-temperature ferromagnetism and a large magnetic anisotropic energy (MAE). Through first-principles swarm-intelligence structural search calculations, we identify an ideal ferromagnetic Fe3P monolayer, in which Fe atoms show a perfect Kagome lattice, leading to strong in-plane Fe-Fe coupling. The predicted Curie temperature of Fe3P reaches ∼420 K, and its MAE is comparable to those of ferromagnetic materials, such as Fe and Fe2Si. Moreover, the Fe3P monolayer remains as an above room-temperature ferromagnet under biaxial strains as large as 10%. Its lattice can be retained at temperatures of ≤1000 K, exhibiting a high thermodynamic stability. All of these desirable properties make the Fe3P monolayer a promising candidate for applications in spintronic nanodevices.
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Affiliation(s)
- Shuang Zheng
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education , Northeast Normal University , Changchun 130024 , China
| | - Chengxi Huang
- Department of Applied Physics and Institution of Energy and Microstructure , Nanjing University of Science and Technology , Nanjing , Jiangsu 210094 , P. R. China
| | - Tong Yu
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education , Northeast Normal University , Changchun 130024 , China
| | - Meiling Xu
- Laboratory of Quantum Materials Design and Application, School of Physics and Electronic Engineering , Jiangsu Normal University , Xuzhou 221116 , China
| | - Shoutao Zhang
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education , Northeast Normal University , Changchun 130024 , China
| | - Haiyang Xu
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education , Northeast Normal University , Changchun 130024 , China
| | - Yichun Liu
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education , Northeast Normal University , Changchun 130024 , China
| | - Erjun Kan
- Department of Applied Physics and Institution of Energy and Microstructure , Nanjing University of Science and Technology , Nanjing , Jiangsu 210094 , P. R. China
| | - Yanchao Wang
- State Key Laboratory of Superhard Materials, College of Physics , Jilin University , Changchun 130012 , China
| | - Guochun Yang
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education , Northeast Normal University , Changchun 130024 , China
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20
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Kar M, Sarkar R, Pal S, Sarkar P. Engineering the magnetic properties of PtSe 2 monolayer through transition metal doping. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:145502. [PMID: 30650400 DOI: 10.1088/1361-648x/aaff40] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Using first-principles calculations, we have studied the energetic feasibility and magnetic properties of transition metal (TM) doped PtSe2 monolayers. Our study shows that TM doped PtSe2 layers with 6.25% doping exhibit versatile spintronic behaviour depending on the nature of the dopant TM atoms. Groups IVB and VIII10 TM doped PtSe2 layers are non magnetic semiconductors, while groups IIIB, VB, VIII8, VIII9, IB TM doped PtSe2 layers are half-metals and finally, groups VIB, VIIB and IIB TM doped PtSe2 layers are spin polarized semiconductors. The presence of half-metallic and magnetic semiconducting characteristics suggest that TM doped PtSe2 layers can be considered as a new kind of dilute magnetic semiconductor and thus have the promise to be used in spintronics. By studying the magnetic interactions between two TM dopants in PtSe2 monolayers for dopant concentration of 12.5% and dopant distance of 12.85 [Formula: see text], we have found that in particular, Fe and Ru doped PtSe2 systems are ferromagnetic half-metal having above-room-temperature Curie point of 422 and 379.9 K, respectively. By varying the dopant distance and concentration we have shown that the magnetic interaction is strongly dependent on dopant distance and concentration. Interestingly, the Curie temperature of TM doped PtSe2 layers is affected by the correlation effects on the TM d states and also spin-orbit coupling. We have also studied the magnetic properties of defect complex composed of one TM dopant and one Pt vacancy (TMPt + VPt) which shows novel magnetism.
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Affiliation(s)
- Moumita Kar
- Department of Chemistry, Visva-Bharati University, Santiniketan-731 235, India
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21
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Yan D, Chen R, Xiao Z, Wang S. Engineering the electronic structure of Co3O4 by carbon-doping for efficient overall water splitting. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.02.091] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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22
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Negi DS, Datta R, Rusz J. Defect driven spin state transition and the existence of half-metallicity in CoO. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:115602. [PMID: 30625423 DOI: 10.1088/1361-648x/aafd11] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We unveil the native defect induced high spin to low spin state transition in [Formula: see text] and half-metallicity in CoO. First principles calculations unravel that, defect density holds a key role in dictating the spin-state transition in [Formula: see text] ion in CoO, and introducing the half-metallicity. Charge transfer in the vicinity of vacancy plane favors the stabilization and coexistence of bivalent [Formula: see text] and trivalent [Formula: see text] ion in CoO. We propose that defect engineering could serve as a route to design the half metallicity in transition metal mono-oxides.
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Affiliation(s)
- Devendra Singh Negi
- Department of Physics and Astronomy, Uppsala University, PO Box 516, 75120 Uppsala, Sweden
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23
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Wang B, Zhang Y, Ma L, Wu Q, Guo Y, Zhang X, Wang J. MnX (X = P, As) monolayers: a new type of two-dimensional intrinsic room temperature ferromagnetic half-metallic material with large magnetic anisotropy. NANOSCALE 2019; 11:4204-4209. [PMID: 30806404 DOI: 10.1039/c8nr09734h] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Recent experimentally demonstrated intrinsic two-dimensional (2D) magnetism has sparked intense interest for advanced spintronic applications. However, the rather low Curie temperature and small magnetic anisotropic energy (MAE) greatly limit their application scope. Here, by using density functional theory calculations, we predict a series of stable 2D MnX (X = P, As, Sb) monolayers, among which MnP and MnAs monolayers exhibit intrinsic ferromagnetic (FM) ordering and considerably large MAEs of 166 and 281 μeV per Mn atom, respectively. More interestingly, the 2D MnP and MnAs monolayers exhibit highly desired half-metallicity with wide spin gaps of about 3 eV. Monte Carlo simulations suggest markedly high Curie temperatures of MnP and MnAs monolayers, ∼495 K and 711 K, respectively. Besides, these monolayers are the lowest energy structures in the 2D search space with excellent dynamic and thermal stabilities. A viable experimental synthesis route is also proposed to produce MnX monolayers via the selective chemical etching method. The outstanding attributes of MnP and MnAs monolayers would substantially broaden the applicability of 2D magnetism for a wide range of applications.
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Affiliation(s)
- Bing Wang
- School of Physics, Southeast University, Nanjing 211189, China.
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24
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Xiao Y, Zhou M, Zeng M, Fu L. Atomic-Scale Structural Modification of 2D Materials. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1801501. [PMID: 30886793 PMCID: PMC6402411 DOI: 10.1002/advs.201801501] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 10/20/2018] [Indexed: 05/02/2023]
Abstract
2D materials have attracted much attention since the discovery of graphene in 2004. Due to their unique electrical, optical, and magnetic properties, they have potential for various applications such as electronics and optoelectronics. Owing to thermal motion and lattice growth kinetics, different atomic-scale structures (ASSs) can originate from natural or intentional regulation of 2D material atomic configurations. The transformations of ASSs can result in the variation of the charge density, electronic density of state and lattice symmetry so that the property tuning of 2D materials can be achieved and the functional devices can be constructed. Here, several kinds of ASSs of 2D materials are introduced, including grain boundaries, atomic defects, edge structures, and stacking arrangements. The design strategies of these structures are also summarized, especially for atomic defects and edge structures. Moreover, toward multifunctional integration of applications, the modulation of electrical, optical, and magnetic properties based on atomic-scale structural modification are presented. Finally, challenges and outlooks are featured in the aspects of controllable structure design and accurate property tuning for 2D materials with ASSs. This work may promote research on the atomic-scale structural modification of 2D materials toward functional applications.
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Affiliation(s)
- Yao Xiao
- The Institute for Advanced Studies (IAS)Wuhan UniversityWuhan430072P. R. China
| | - Mengyue Zhou
- College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072P. R. China
| | - Mengqi Zeng
- College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072P. R. China
| | - Lei Fu
- The Institute for Advanced Studies (IAS)Wuhan UniversityWuhan430072P. R. China
- College of Chemistry and Molecular SciencesWuhan UniversityWuhan430072P. R. China
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25
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Guo Y, Dai B, Peng J, Wu C, Xie Y. Electron Transport in Low Dimensional Solids: A Surface Chemistry Perspective. J Am Chem Soc 2018; 141:723-732. [DOI: 10.1021/jacs.8b09821] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yuqiao Guo
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science & Technology of China, Hefei, Anhui 230026, People’s Republic of China
| | - Baohu Dai
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science & Technology of China, Hefei, Anhui 230026, People’s Republic of China
| | - Jing Peng
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science & Technology of China, Hefei, Anhui 230026, People’s Republic of China
| | - Changzheng Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science & Technology of China, Hefei, Anhui 230026, People’s Republic of China
| | - Yi Xie
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science & Technology of China, Hefei, Anhui 230026, People’s Republic of China
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Jurelo AR, Ribeiro RAP, de Lazaro SR, Monteiro JFHL. Structural, vibrational and electronic properties of the superconductor Cu xTiSe 2: theoretical and experimental insights. Phys Chem Chem Phys 2018; 20:27011-27018. [PMID: 30328859 DOI: 10.1039/c8cp04154g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The crystal/electronic structure and vibrational properties of the CuxTiSe2 intercalation compounds were studied combining experimental and theoretical techniques. The Cu added into the TiSe2 matrix was characterized as an intercalant atom into van der Waals gaps from Raman spectroscopy analysis. Theoretical and experimental data indicate the Cu-intercalation effect on the crystalline structure as a local disorder affecting [TiSe6] clusters from SeSe layers, which results in a volume expansion. A significant charge transfer from Cu atoms to the host lattice results in a change from Ti4+ to Ti3+ species, narrowing the band-gap and increasing the superconductivity of the material.
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Affiliation(s)
- Alcione Roberto Jurelo
- Departamento de Física, Universidade Estadual de Ponta Grossa, Av. Gen. Carlos Cavalcanti 4748, 84.030-000, Ponta Grossa, Paraná, Brazil
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Wang B, Wu Q, Zhang Y, Guo Y, Zhang X, Zhou Q, Dong S, Wang J. High Curie-temperature intrinsic ferromagnetism and hole doping-induced half-metallicity in two-dimensional scandium chlorine monolayers. NANOSCALE HORIZONS 2018; 3:551-555. [PMID: 32254142 DOI: 10.1039/c8nh00101d] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Two-dimensional (2D) ferromagnetic materials provide new platforms for spintronic applications, but most of the reported 2D magnetic orderings can only be maintained at low temperature. The search for high Curie temperature intrinsic ferromagnetism is still a current hotspot. Herein through comprehensive first-principles calculations and Monte Carlo simulation, we predict a promising 2D scandium chlorine (ScCl) monolayer with intrinsic ferromagnetism and a Curie temperature of 185 K, which is much higher than that of the reported CrI3 monolayer (45 K) and the boiling point of liquid nitrogen (77 K). Moreover, a small amount of hole doping can induce a transition from a ferromagnetic metal to a half-metal. Furthermore, the ScCl monolayer possesses excellent thermal and dynamical stabilities as well as feasibility of experimental exfoliation from its layered bulk. These intriguing electronic and magnetic properties make the ScCl monolayer a promising candidate for spintronic applications.
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Affiliation(s)
- Bing Wang
- School of Physics, Southeast University, Nanjing 211189, China.
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28
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Wu Q, Zhang Y, Zhou Q, Wang J, Zeng XC. Transition-Metal Dihydride Monolayers: A New Family of Two-Dimensional Ferromagnetic Materials with Intrinsic Room-Temperature Half-Metallicity. J Phys Chem Lett 2018; 9:4260-4266. [PMID: 30001619 DOI: 10.1021/acs.jpclett.8b01976] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Two-dimensional (2D) ferromagnetic materials with intrinsic half-metallicity are highly desirable for nanoscale spintronic applications. Here, we predict a new and stable family of 2D transition-metal dihydride (MH2; M = Sc, Ti, V, Cr, Fe, Co, Ni) monolayers with novel properties. Our density functional theory computation shows that CoH2 and ScH2 monolayers are ferromagnetic metals, while the others are antiferromagnetic semiconductors. In particular, the CoH2 monolayer is a perfect half-metal with a wide spin gap of 3.48 eV. The ScH2 monolayer can also possess half-metallicity through hole doping. Most importantly, our Monte Carlo simulations show that the CoH2 monolayer possesses an above-room-temperature Curie point (339 K), while that of the ScH2 monolayer can also reach 160 K. A synthetic approach is proposed to realize CoH2 and ScH2 monolayers in the laboratory. Notably, their half-metallicity can be well maintained on substrates. The new family of MH2 monolayers are promising functional materials for spintronic applications due to their novel magnetic properties.
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Affiliation(s)
- Qisheng Wu
- School of Physics , Southeast University , Nanjing 211189 , People's Republic of China
- Department of Chemistry , University of Nebraska-Lincoln , Lincoln , Nebraska 68588 , United States
| | - Yehui Zhang
- School of Physics , Southeast University , Nanjing 211189 , People's Republic of China
| | - Qionghua Zhou
- School of Physics , Southeast University , Nanjing 211189 , People's Republic of China
| | - Jinlan Wang
- School of Physics , Southeast University , Nanjing 211189 , People's Republic of China
- Synergetic Innovation Center for Quantum Effects and Applications (SICQEA) , Hunan Normal University , Changsha , Hunan 410081 , China
| | - Xiao Cheng Zeng
- Department of Chemistry , University of Nebraska-Lincoln , Lincoln , Nebraska 68588 , United States
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29
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Li Y, Yin J, An L, Lu M, Sun K, Zhao YQ, Gao D, Cheng F, Xi P. FeS 2 /CoS 2 Interface Nanosheets as Efficient Bifunctional Electrocatalyst for Overall Water Splitting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1801070. [PMID: 29808557 DOI: 10.1002/smll.201801070] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 04/17/2018] [Indexed: 05/21/2023]
Abstract
Electrochemical water splitting to produce hydrogen and oxygen, as an important reaction for renewable energy storage, needs highly efficient and stable catalysts. Herein, FeS2 /CoS2 interface nanosheets (NSs) as efficient bifunctional electrocatalysts for overall water splitting are reported. The thickness and interface disordered structure with rich defects of FeS2 /CoS2 NSs are confirmed by atomic force microscopy and high-resolution transmission electron microscopy. Furthermore, extended X-ray absorption fine structure spectroscopy clarifies that FeS2 /CoS2 NSs with sulfur vacancies, which can further increase electrocatalytic performance. Benefiting from the interface nanosheets' structure with abundant defects, the FeS2 /CoS2 NSs show remarkable hydrogen evolution reaction (HER) performance with a low overpotential of 78.2 mV at 10 mA cm-2 and a superior stability for 80 h in 1.0 m KOH, and an overpotential of 302 mV at 100 mA cm-2 for the oxygen evolution reaction (OER). More importantly, the FeS2 /CoS2 NSs display excellent performance for overall water splitting with a voltage of 1.47 V to achieve current density of 10 mA cm-2 and maintain the activity for at least 21 h. The present work highlights the importance of engineering interface nanosheets with rich defects based on transition metal dichalcogenides for boosting the HER and OER performance.
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Affiliation(s)
- Yuxuan Li
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Jie Yin
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Li An
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Min Lu
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Ke Sun
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Yong-Qin Zhao
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Daqiang Gao
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Fangyi Cheng
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Pinxian Xi
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
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Zhang X, Lai Z, Ma Q, Zhang H. Novel structured transition metal dichalcogenide nanosheets. Chem Soc Rev 2018; 47:3301-3338. [PMID: 29671441 DOI: 10.1039/c8cs00094h] [Citation(s) in RCA: 149] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ultrathin two-dimensional (2D) layered transition metal dichalcogenides (TMDs) have attracted considerable attention owing to their unique properties and great potential in a wide range of applications. Great efforts have been devoted to the preparation of novel-structured TMD nanosheets by engineering their intrinsic structures at the atomic scale. Until now, a lot of new-structured TMD nanosheets, such as vacancy-containing TMDs, heteroatom-doped TMDs, TMD alloys, 1T'/1T phase and in-plane TMD crystal-phase heterostructures, TMD heterostructures and Janus TMD nanosheets, have been prepared. These materials exhibit unique properties and hold great promise in various applications, including electronics/optoelectronics, thermoelectrics, catalysis, energy storage and conversion and biomedicine. This review focuses on the most recent important discoveries in the preparation, characterization and application of these new-structured ultrathin 2D layered TMDs.
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Affiliation(s)
- Xiao Zhang
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
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Li Y, Yin J, An L, Lu M, Sun K, Zhao YQ, Cheng F, Xi P. Metallic CuCo 2S 4 nanosheets of atomic thickness as efficient bifunctional electrocatalysts for portable, flexible Zn-air batteries. NANOSCALE 2018; 10:6581-6588. [PMID: 29577135 DOI: 10.1039/c8nr01381k] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Optimized catalysts show great potential for renewable energy storage and conversion. Herein, we report metallic CuCo2S4 nanosheets (NSs) of atomic thickness as efficient bifunctional electrocatalysts for use in portable, flexible Zn-air batteries. The metallic CuCo2S4 NSs of atomic thickness with 4-atom-thick to 6-atom-thick layers are confirmed by temperature-dependent electrical resistance measurements and atomic force microscopy. Furthermore, extended X-ray absorption fine structure spectroscopy confirms that CuCo2S4 NSs with sulfur vacancies can further increase the OER activity. Due to high electrical conductivity and ultrathin nanosheet structure with abundant defects, CuCo2S4 NSs exhibit excellent reversible oxygen catalytic performance with an overpotential of 287 mV (at j = 10 mA cm-2) for the oxygen evolution reaction (OER) and an onset potential of 0.90 V for the oxygen reduction reaction (ORR). Additionally, the portable, flexible Zn-air battery using CuCo2S4 NSs as the air-cathode displays a high open circuit voltage and strong rechargeable capacity for 18 h. The present study highlights the importance of designing metallic catalysts having atomic thickness with surface defects for highly efficient and stable renewable energy storage and conversion.
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Affiliation(s)
- Yuxuan Li
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China.
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