1
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Zhang X, Xu J, Zhi A, Wang J, Wang Y, Zhu W, Han X, Tian X, Bai X, Sun B, Wei Z, Zhang J, Wang K. Low-Defect-Density Monolayer MoS 2 Wafer by Oxygen-Assisted Growth-Repair Strategy. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2408640. [PMID: 39244733 DOI: 10.1002/advs.202408640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2024] [Indexed: 09/10/2024]
Abstract
Atomic chalcogen vacancy is the most commonly observed defect category in two dimensional (2D) transition-metal dichalcogenides, which can be detrimental to the intrinsic properties and device performance. Here a low-defect density, high-uniform, wafer-scale single crystal epitaxial technology by in situ oxygen-incorporated "growth-repair" strategy is reported. For the first time, the oxygen-repairing efficiency on MoS2 monolayers at atomic scale is quantitatively evaluated. The sulfur defect density is greatly reduced from (2.71 ± 0.65) × 1013 down to (4.28 ± 0.27) × 1012 cm-2, which is one order of magnitude lower than reported as-grown MoS2. Such prominent defect deduction is owing to the kinetically more favorable configuration of oxygen substitution and an increase in sulfur vacancy formation energy around oxygen-incorporated sites by the first-principle calculations. Furthermore, the sulfur vacancies induced donor defect states is largely eliminated confirmed by quenched defect-related emission. The devices exhibit improved carrier mobility by more than three times up to 65.2 cm2 V-1 s-1 and lower Schottky barrier height reduced by half (less than 20 meV), originating from the suppressed Fermi-level pinning effect from disorder-induced gap state. The work provides an effective route toward engineering the intrinsic defect density and electronic states through modulating synthesis kinetics of 2D materials.
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Affiliation(s)
- Xiaomin Zhang
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jiahan Xu
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- School of Microelectronics, University of Science and Technology of China, Hefei, 230026, China
| | - Aomiao Zhi
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Jian Wang
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yue Wang
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wenkai Zhu
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xingjie Han
- School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China
| | - Xuezeng Tian
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xuedong Bai
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Baoquan Sun
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhongming Wei
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jing Zhang
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Kaiyou Wang
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
- Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing, 100049, China
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2
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Lv SH, Wang Y, Wang DB, Song CX. Defect Engineering in Bi-Based Photo/Electrocatalysts for Nitrogen Reduction to Ammonia. Chemistry 2024; 30:e202400342. [PMID: 38687194 DOI: 10.1002/chem.202400342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 04/26/2024] [Accepted: 04/29/2024] [Indexed: 05/02/2024]
Abstract
Main group Bi-based materials have gained popularity as N2 reduction reaction (NRR) photo/electrocatalysts due to their ability to inhibit competitive H2 evolution reactions (HER) and the unique N2 adsorption activities. The introduction of defects in Bi-based catalysts represents a highly effective strategy for enhancing light absorption, promoting efficient separation of photogenerated carriers, optimizing the activity of free radicals, regulating electronic structure, and improving catalytic performance. In this review, we outline the various applications of state of the defect engineering in Bi-based catalysts and elucidate the impact of vacancies on NRR performance. In particular, the types of defects, methods of defects tailoring, advanced characterization techniques, as well as the Bi-based catalysts with abundant defects and their corresponding catalytic behavior in NRR were elucidated in detail. Finally, the main challenges and opportunities for future development of defective Bi-based NRR catalysts are discussed, which provides a comprehensive theoretical guidance for this field.
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Affiliation(s)
- Shuhua H Lv
- College of Materials Science and Engineering, Qingdao University of Science & Technology, Qingdao, 266042, PR China
| | - Ying Wang
- College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao, 266042, PR China
- State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, PR China
| | - Debao B Wang
- College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao, 266042, PR China
| | - Caixia X Song
- College of Materials Science and Engineering, Qingdao University of Science & Technology, Qingdao, 266042, PR China
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3
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Yang X, Lin L, Guo X, Zhang S. Design of Multifunctional Electrocatalysts for ORR/OER/HER/HOR: Janus Makes Difference. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2404000. [PMID: 38809060 DOI: 10.1002/smll.202404000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Indexed: 05/30/2024]
Abstract
Multifunctional electrocatalysts for hydrogen evolution reaction (HER), hydrogen oxidation reaction (HOR), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR) have broad application prospects; However, realization of such kinds of materials remain difficulties because it requires the materials to have not only unique electronic properties, but multiple active centers to deal with different reactions. Here, employing density functional theory (DFT) computations, it is demonstrated that by decorating the Janus-type 2D transition metal dichalcogenide (TMD) of TaSSe with the single atoms, the materials can achieve multifunctionality to catalyze the ORR/OER/HER/HOR. Out of sixteen catalytic systems, Pt-VS (i.e., Pt atom embedded in the sulfur vacancy), Pd-VSe, and Pt-VSe@TaSSe are promising multifunctional catalysts with superior stability. Among them, the Pt-VS@TaSSe catalyst exhibits the highest activity with theoretical overpotentials ηORR = 0.40 V, ηOER = 0.39 V, and ηHER/HOR = 0.07 V, respectively, better than the traditional Pt (111), IrO2 (110). The interplays between the catalyst and the reaction intermediate over the course of the reaction are then systematically investigated. Generally, this study presents a viable approach for the design and development of advanced multifunctional electrocatalysts. It enriches the application of Janus, a new 2D material, in electrochemical energy storage and conversion technology.
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Affiliation(s)
- Xinyu Yang
- Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China
| | - Long Lin
- Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China
| | - Xiangyu Guo
- School of Science, Constructor University, 28759, Bremen, Germany
| | - Shengli Zhang
- MIIT Key Laboratory of Advanced Display Materials and Devices Ministry of Industry and Information Technology, College of Material Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
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4
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Su S, Zhao J, Ly TH. Scanning Probe Microscopies for Characterizations of 2D Materials. SMALL METHODS 2024:e2400211. [PMID: 38766949 DOI: 10.1002/smtd.202400211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 04/12/2024] [Indexed: 05/22/2024]
Abstract
2D materials are intriguing due to their remarkably thin and flat structure. This unique configuration allows the majority of their constituent atoms to be accessible on the surface, facilitating easier electron tunneling while generating weak surface forces. To decipher the subtle signals inherent in these materials, the application of techniques that offer atomic resolution (horizontal) and sub-Angstrom (z-height vertical) sensitivity is crucial. Scanning probe microscopy (SPM) emerges as the quintessential tool in this regard, owing to its atomic-level spatial precision, ability to detect unitary charges, responsiveness to pico-newton-scale forces, and capability to discern pico-ampere currents. Furthermore, the versatility of SPM to operate under varying environmental conditions, such as different temperatures and in the presence of various gases or liquids, opens up the possibility of studying the stability and reactivity of 2D materials in situ. The characteristic flatness, surface accessibility, ultra-thinness, and weak signal strengths of 2D materials align perfectly with the capabilities of SPM technologies, enabling researchers to uncover the nuanced behaviors and properties of these advanced materials at the nanoscale and even the atomic scale.
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Affiliation(s)
- Shaoqiang Su
- Department of Chemistry and Center of Super-Diamond & Advanced Films (COSDAF), City University of Hong Kong, Kowloon, 999077, China
| | - Jiong Zhao
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, 999077, P. R. China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, 518057, China
| | - Thuc Hue Ly
- Department of Chemistry and Center of Super-Diamond & Advanced Films (COSDAF), City University of Hong Kong, Kowloon, 999077, China
- Department of Chemistry and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, 999077, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
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5
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Biswas K, Chen Q, Obermann S, Ma J, Soler-Polo D, Melidonie J, Barragán A, Sánchez-Grande A, Lauwaet K, Gallego JM, Miranda R, Écija D, Jelínek P, Feng X, Urgel JI. On-Surface Synthesis of Non-Benzenoid Nanographenes Embedding Azulene and Stone-Wales Topologies. Angew Chem Int Ed Engl 2024; 63:e202318185. [PMID: 38299925 DOI: 10.1002/anie.202318185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/26/2024] [Accepted: 01/30/2024] [Indexed: 02/02/2024]
Abstract
The incorporation of non-benzenoid motifs in graphene nanostructures significantly impacts their properties, making them attractive for applications in carbon-based electronics. However, understanding how specific non-benzenoid structures influence their properties remains limited, and further investigations are needed to fully comprehend their implications. Here, we report an on-surface synthetic strategy toward fabricating non-benzenoid nanographenes containing different combinations of pentagonal and heptagonal rings. Their structure and electronic properties were investigated via scanning tunneling microscopy and spectroscopy, complemented by computational investigations. After thermal activation of the precursor P on the Au(111) surface, we detected two major nanographene products. Nanographene Aa-a embeds two azulene units formed through oxidative ring-closure of methyl substituents, while Aa-s contains one azulene unit and one Stone-Wales defect, formed by the combination of oxidative ring-closure and skeletal ring-rearrangement reactions. Aa-a exhibits an antiferromagnetic ground state with the highest magnetic exchange coupling reported up to date for a non-benzenoid containing nanographene, coexisting with side-products with closed shell configurations resulted from the combination of ring-closure and ring-rearragement reactions (Ba-a , Ba-s , Bs-a and Bs-s ). Our results provide insights into the single gold atom assisted synthesis of novel NGs containing non-benzenoid motifs and their tailored electronic/magnetic properties.
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Affiliation(s)
- Kalyan Biswas
- IMDEA Nanoscience, C/Faraday 9, Campus de Cantoblanco, 28049, Madrid, Spain
| | - Qifan Chen
- Institute of Physics of the Czech Academy of Science, CZ-16253, Praha, Czech Republic
- Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 180 00, Praha, Czech Republic
| | - Sebastian Obermann
- Center for Advancing Electronics Dresden (cfaed) & Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, D-01069, Dresden, Germany
| | - Ji Ma
- Center for Advancing Electronics Dresden (cfaed) & Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, D-01069, Dresden, Germany
- Max Planck Institute of Microstructure Physics, Weinberg 2, 06120, Halle, Germany
| | - Diego Soler-Polo
- Institute of Physics of the Czech Academy of Science, CZ-16253, Praha, Czech Republic
| | - Jason Melidonie
- Center for Advancing Electronics Dresden (cfaed) & Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, D-01069, Dresden, Germany
| | - Ana Barragán
- IMDEA Nanoscience, C/Faraday 9, Campus de Cantoblanco, 28049, Madrid, Spain
| | - Ana Sánchez-Grande
- IMDEA Nanoscience, C/Faraday 9, Campus de Cantoblanco, 28049, Madrid, Spain
| | - Koen Lauwaet
- IMDEA Nanoscience, C/Faraday 9, Campus de Cantoblanco, 28049, Madrid, Spain
| | - José M Gallego
- Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC, Cantoblanco, 28049, Madrid, Spain
| | - Rodolfo Miranda
- IMDEA Nanoscience, C/Faraday 9, Campus de Cantoblanco, 28049, Madrid, Spain
- Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - David Écija
- IMDEA Nanoscience, C/Faraday 9, Campus de Cantoblanco, 28049, Madrid, Spain
- Unidad de Nanomateriales avanzados, IMDEA Nanoscience, Unidad asociada al CSIC por el ICMM, 28049, Madrid, Spain
| | - Pavel Jelínek
- Institute of Physics of the Czech Academy of Science, CZ-16253, Praha, Czech Republic
- Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc, 771 46, Olomouc, Czech Republic
| | - Xinliang Feng
- Center for Advancing Electronics Dresden (cfaed) & Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, D-01069, Dresden, Germany
- Max Planck Institute of Microstructure Physics, Weinberg 2, 06120, Halle, Germany
| | - José I Urgel
- IMDEA Nanoscience, C/Faraday 9, Campus de Cantoblanco, 28049, Madrid, Spain
- Unidad de Nanomateriales avanzados, IMDEA Nanoscience, Unidad asociada al CSIC por el ICMM, 28049, Madrid, Spain
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6
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Garrido M, Naranjo A, Pérez EM. Characterization of emerging 2D materials after chemical functionalization. Chem Sci 2024; 15:3428-3445. [PMID: 38455011 PMCID: PMC10915849 DOI: 10.1039/d3sc05365b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 02/07/2024] [Indexed: 03/09/2024] Open
Abstract
The chemical modification of 2D materials has proven a powerful tool to fine tune their properties. With this motivation, the development of new reactions has moved extremely fast. The need for speed, together with the intrinsic heterogeneity of the samples, has sometimes led to permissiveness in the purification and characterization protocols. In this review, we present the main tools available for the chemical characterization of functionalized 2D materials, and the information that can be derived from each of them. We then describe examples of chemical modification of 2D materials other than graphene, focusing on the chemical description of the products. We have intentionally selected examples where an above-average characterization effort has been carried out, yet we find some cases where further information would have been welcome. Our aim is to bring together the toolbox of techniques and practical examples on how to use them, to serve as guidelines for the full characterization of covalently modified 2D materials.
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7
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Okello ON, Yang DH, Seo SY, Park J, Moon G, Shin D, Chu YS, Yang S, Mizoguchi T, Jo MH, Choi SY. Atomistic Probing of Defect-Engineered 2H-MoTe 2 Monolayers. ACS NANO 2024; 18:6927-6935. [PMID: 38374663 PMCID: PMC10919086 DOI: 10.1021/acsnano.3c08606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 02/01/2024] [Accepted: 02/05/2024] [Indexed: 02/21/2024]
Abstract
Point defects dictate various physical, chemical, and optoelectronic properties of two-dimensional (2D) materials, and therefore, a rudimentary understanding of the formation and spatial distribution of point defects is a key to advancement in 2D material-based nanotechnology. In this work, we performed the demonstration to directly probe the point defects in 2H-MoTe2 monolayers that are tactically exposed to (i) 200 °C-vacuum-annealing and (ii) 532 nm-laser-illumination; and accordingly, we utilize a deep learning algorithm to classify and quantify the generated point defects. We discovered that tellurium-related defects are mainly generated in both 2H-MoTe2 samples; but interestingly, 200 °C-vacuum-annealing and 532 nm-laser-illumination modulate a strong n-type and strong p-type 2H-MoTe2, respectively. While 200 °C-vacuum-annealing generates tellurium vacancies or tellurium adatoms, 532 nm-laser-illumination prompts oxygen atoms to be adsorbed/chemisorbed at tellurium vacancies, giving rise to the p-type characteristic. This work significantly advances the current understanding of point defect engineering in 2H-MoTe2 monolayers and other 2D materials, which is critical for developing nanoscale devices with desired functionality.
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Affiliation(s)
- Odongo
Francis Ngome Okello
- Department
of Materials Science and Engineering, Pohang
University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang-si 37673, Republic of Korea
- Samsung
Electronics, Foundry Analysis & Engineering Team, Global Manufacturing & Infra Technology, Samsungjeonja-ro 1, Hwaseong-si 18448, Republic
of Korea
| | - Dong-Hwan Yang
- Department
of Materials Science and Engineering, Pohang
University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang-si 37673, Republic of Korea
- Center
for Van der Waals Quantum Solids, Institute
of Basic Science (IBS), 77 Cheongam-ro, Nam-gu, Pohang-si 37673, Republic of Korea
| | - Seung-Young Seo
- Department
of Materials Science and Engineering, Pohang
University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang-si 37673, Republic of Korea
| | - Jewook Park
- Department
of Materials Science and Engineering, Pohang
University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang-si 37673, Republic of Korea
- Center
for Van der Waals Quantum Solids, Institute
of Basic Science (IBS), 77 Cheongam-ro, Nam-gu, Pohang-si 37673, Republic of Korea
| | - Gunho Moon
- Department
of Materials Science and Engineering, Pohang
University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang-si 37673, Republic of Korea
- Center
for Van der Waals Quantum Solids, Institute
of Basic Science (IBS), 77 Cheongam-ro, Nam-gu, Pohang-si 37673, Republic of Korea
| | - Dongwon Shin
- Materials
Science and Technology Division, Oak Ridge
National Laboratory (ORNL), Oak Ridge, Tennessee 37831, United States
| | - Yu-Seong Chu
- Division
of Biomedical Engineering, College of Health Sciences, Yonsei University, 1, Yeonsedae-gil, Heungeop-myeon, Wonju-si 26493, Republic of Korea
| | - Sejung Yang
- Department
of Precision Medicine, Yonsei University,
Wonju College of Medicine, 20 Ilsan-ro, Wonju-si 26426, Republic of Korea
- Department
of Medical Informatics and Biostatistics, Graduate School, Yonsei University, 20 Ilsan-ro, Wonju-si 26426, Republic
of Korea
| | - Teruyasu Mizoguchi
- Institute
of Industrial Science, The University of
Tokyo, Komaba, Meguro 4-6-1, Tokyo 153-8505, Japan
| | - Moon-Ho Jo
- Department
of Materials Science and Engineering, Pohang
University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang-si 37673, Republic of Korea
- Center
for Van der Waals Quantum Solids, Institute
of Basic Science (IBS), 77 Cheongam-ro, Nam-gu, Pohang-si 37673, Republic of Korea
| | - Si-Young Choi
- Department
of Materials Science and Engineering, Pohang
University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang-si 37673, Republic of Korea
- Center
for Van der Waals Quantum Solids, Institute
of Basic Science (IBS), 77 Cheongam-ro, Nam-gu, Pohang-si 37673, Republic of Korea
- Department
of Semiconductor Engineering, POSTECH, 77 Cheongam-ro, Nam-gu, Pohang-si 37673, Republic of Korea
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8
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Mahendran S, Carrete J, Isacsson A, Madsen GKH, Erhart P. Quantitative Predictions of the Thermal Conductivity in Transition Metal Dichalcogenides: Impact of Point Defects in MoS 2 and WS 2 Monolayers. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2024; 128:1709-1716. [PMID: 38322774 PMCID: PMC10839904 DOI: 10.1021/acs.jpcc.3c06820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 12/25/2023] [Accepted: 12/27/2023] [Indexed: 02/08/2024]
Abstract
Transition metal dichalcogenides are investigated for various applications at the nanoscale because of their unique combination of properties and dimensionality. For many of the anticipated applications, heat conduction plays an important role. At the same time, these materials often contain relatively large amounts of point defects. Here, we provide a systematic analysis of the impact of intrinsic and selected extrinsic defects on the lattice thermal conductivity of MoS2 and WS2 monolayers. We combine Boltzmann transport theory and Green's function-based T-matrix approach for the calculation of scattering rates. The force constants for the defect configurations are obtained from density functional theory calculations via a regression approach, which allows us to sample a rather large number of defects at a moderate computational cost and to systematically enforce both the translational and rotational acoustic sum rules. The calculated lattice thermal conductivity is in quantitative agreement with the experimental data for heat transport and defect concentrations for both MoS2 and WS2. Crucially, this demonstrates that the strong deviation from a 1/T temperature dependence of the lattice thermal conductivity observed experimentally can be fully explained by the presence of point defects. We furthermore predict the scattering strengths of the intrinsic defects to decrease in the sequence VMo ≈ V2S= > V2S⊥ > VS > Sad in both materials, while the scattering rates for the extrinsic (adatom) defects decrease with increasing mass such that Liad > Naad > Kad. Compared with earlier work, we find that both intrinsic and extrinsic adatoms are relatively weak scatterers. We attribute this difference to the treatment of the translational and rotational acoustic sum rules, which, if not enforced, can lead to spurious contributions in the zero-frequency limit.
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Affiliation(s)
- Srinivasan Mahendran
- Department
of Physics, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
| | - Jesús Carrete
- Instituto
de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, E-50009 Zaragoza, Spain
- Institute
of Materials Chemistry, TU Wien, A-1060 Vienna, Austria
| | - Andreas Isacsson
- Department
of Physics, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
| | | | - Paul Erhart
- Department
of Physics, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
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9
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Wang R, Liu Q, Dai S, Liu CM, Liu Y, Sun ZY, Li H, Zhang CJ, Wang H, Xu CY, Shao WZ, Meixner AJ, Zhang D, Li Y, Zhen L. Defect Emission and Its Dipole Orientation in Layered Ternary Znln 2 S 4 Semiconductor. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2305658. [PMID: 37798674 DOI: 10.1002/smll.202305658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 09/08/2023] [Indexed: 10/07/2023]
Abstract
Defect engineering is promising to tailor the physical properties of 2D semiconductors for function-oriented electronics and optoelectronics. Compared with the extensively studied 2D binary materials, the origin of defects and their influence on physical properties of 2D ternary semiconductors are not clarified. Here, the effect of defects on the electronic structure and optical properties of few-layer hexagonal Znln2 S4 is thoroughly studied via versatile spectroscopic tools in combination with theoretical calculations. It is demonstrated that the Zn-In antistructural defects induce the formation of a series of donor and acceptor energy levels and sulfur vacancies induce donor energy levels, leading to rich recombination paths for defect emission and extrinsic absorption. Impressively, the emission of donor-acceptor pair in Znln2 S4 can be significantly tailored by electrostatic gating due to efficient tunability of Fermi level (Ef ). Furthermore, the layer-dependent dipole orientation of defect emission in Znln2 S4 is directly revealed by back focal plane imagining, where it presents obviously in-plane dipole orientation within a dozen-layer thickness of Znln2 S4 . These unique features of defects in Znln2 S4 including extrinsic absorption, rich recombination paths, gate tunability, and in-plane dipole orientation are definitely a benefit to the advanced orientation-functional optoelectronic applications.
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Affiliation(s)
- Rui Wang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Quan Liu
- Institute of Physical and Theoretical Chemistry, Eberhard Karls University Tübingen, 72076, Tübingen, Germany
| | - Sheng Dai
- School of Physical Science and Technology, Center for Transformative Science, ShanghaiTech University, Shanghai, 201210, China
| | - Chao-Ming Liu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
- Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, Harbin, 150001, China
| | - Yue Liu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Zhao-Yuan Sun
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Hui Li
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
| | - Chang-Jin Zhang
- Chinese Academy of Sciences Hefei Institutes of Physical Science, High Magnetic Field Laboratory of Anhui Province, Hefei, 230031, China
| | - Han Wang
- School of Physical Science and Technology, Center for Transformative Science, ShanghaiTech University, Shanghai, 201210, China
| | - Cheng-Yan Xu
- Sauvage Laboratory for Smart Materials, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Wen-Zhu Shao
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Alfred J Meixner
- Institute of Physical and Theoretical Chemistry, Eberhard Karls University Tübingen, 72076, Tübingen, Germany
| | - Dai Zhang
- Institute of Physical and Theoretical Chemistry, Eberhard Karls University Tübingen, 72076, Tübingen, Germany
| | - Yang Li
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
- MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Harbin Institute of Technology, Harbin, 150080, China
| | - Liang Zhen
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
- MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing, Harbin Institute of Technology, Harbin, 150080, China
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10
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Afrid SMTS. Defect engineered magnetism induction and electronic structure modulation in monolayer MoS 2. Heliyon 2024; 10:e23384. [PMID: 38163200 PMCID: PMC10755313 DOI: 10.1016/j.heliyon.2023.e23384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/01/2023] [Accepted: 12/01/2023] [Indexed: 01/03/2024] Open
Abstract
The electronic, magnetic, and optical characteristics of a defective monolayer MoS2 were examined by employing density functional theory (DFT)-based first-principles calculations. The effects of several defects on the electrical, magnetic, and optical properties, including Mo vacancies, MoS3 vacancies, and the substitution of a single Mo atom by two S atoms were studied in this work. Our first-principles calculations revealed that different types of defects produced distinct energy states within the band gap, leading to a band gap reduction after the introduction of various types of defects, which caused a change from semiconducting to metallic behavior. The spin-up and spin-down states were separated in the case of MoS3 vacancy. The total magnetization was ∼ -0.83 μ B /cell, and the absolute magnetization was ∼ 1.23 μ B /cell. Moreover, spin-up states had a 0.45 eV band gap, whereas spin-down states were metallic. Consequently, it can be promising for spin filter applications. It was disclosed that the broadband part of the electromagnetic spectrum has a high absorption coefficient, which is necessary for applications including impurity detection, photodiodes, and solar cells. Designing spintronic and optoelectronic devices will benefit from the modification of the electrical, optical, and magnetic properties by defect engineering of MoS2 monolayers presented here.
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Affiliation(s)
- Sheikh Mohd. Ta-Seen Afrid
- Department of Electrical and Electronics Engineering, Bangladesh University of Engineering and Technology, West Palashi Campus, Dhaka 1205, Bangladesh
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11
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Sun C, Zhang X, Huang H, Liu Y, Mo X, Feng Y, Wang J, Zhou W, Chu PK, Yu XF, Liu W. Selective oxidation of p-phenylenediamine for blood glucose detection enabled by Se-vacancy-rich TiSe 2-x@Au nanozyme. Biosens Bioelectron 2023; 241:115665. [PMID: 37716159 DOI: 10.1016/j.bios.2023.115665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 08/25/2023] [Accepted: 09/02/2023] [Indexed: 09/18/2023]
Abstract
Nanozymes with enzyme-like characteristics have drawn wide interest but the catalytic activity and substrate selectivity of nanozymes still need improvement. Herein, Se-vacancy-rich TiSe2-x@Au nanocomposites are designed and demonstrated as nanozymes. The TiSe2-x@Au nanocomposites show excellent peroxidase-like activity and the chromogenic substrate p-phenylenediamine (PPD) can be selectively oxidized to compounds that exhibit an absorption peak at 413 nm that differs from that of self-oxidation or generally oxidized species, suggesting high catalytic activity and strong substrate selectivity. Theoretical calculations reveal that the PPD adsorption geometry at Se vacancies with an adsorption energy of -3.00 eV shows a unique spatial configuration and charge distribution, thereby inhibiting the free reaction and promoting both the activity and selectivity in PPD oxidation. The TiSe2-x@Au colorimetric system exhibits a wide linear range of 0.015 mM-0.6 mM and a low detection limit of 0.0037 mM in the detection of glucose. The blood glucose detection performance for human serum samples is comparable to that of a commercial glucose meter in the hospital (relative standard deviation < 6%). Our findings demonstrate a new strategy for rapid and accurate detection of blood glucose and our results provide insights into the future design of nanozymes.
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Affiliation(s)
- Caixia Sun
- Zhanjiang Institute of Clinical Medicine, Zhanjiang Central Hospital, Guangdong Medical University, Zhanjiang, 524045, People's Republic of China; Shenzhen Key Laboratory of Micro/Nano Biosensing, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, People's Republic of China; The First Clinical Medical School, Guangdong Medical University, Zhanjiang, 524023, People's Republic of China
| | - Xue Zhang
- Shenzhen Key Laboratory of Micro/Nano Biosensing, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, People's Republic of China
| | - Hao Huang
- Shenzhen Key Laboratory of Micro/Nano Biosensing, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, People's Republic of China.
| | - Ya Liu
- Zhanjiang Institute of Clinical Medicine, Zhanjiang Central Hospital, Guangdong Medical University, Zhanjiang, 524045, People's Republic of China
| | - Xianwei Mo
- Zhanjiang Institute of Clinical Medicine, Zhanjiang Central Hospital, Guangdong Medical University, Zhanjiang, 524045, People's Republic of China
| | - Yufei Feng
- Life Science and Technology School, Lingnan Normal University, Zhanjiang, 524048, People's Republic of China
| | - Jiahong Wang
- Shenzhen Key Laboratory of Micro/Nano Biosensing, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, People's Republic of China
| | - Wenhua Zhou
- Shenzhen Key Laboratory of Micro/Nano Biosensing, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, People's Republic of China; Biomedical Imaging Science and System Key Laboratory, Chinese Academy of Sciences, Shenzhen, 518055, People's Republic of China
| | - Paul K Chu
- Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, People's Republic of China
| | - Xue-Feng Yu
- Shenzhen Key Laboratory of Micro/Nano Biosensing, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, People's Republic of China; Biomedical Imaging Science and System Key Laboratory, Chinese Academy of Sciences, Shenzhen, 518055, People's Republic of China
| | - Wenxin Liu
- Zhanjiang Institute of Clinical Medicine, Zhanjiang Central Hospital, Guangdong Medical University, Zhanjiang, 524045, People's Republic of China.
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12
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Gao J, Zhang W, Yan X, Zhang X, Wang S, Yang G. Metallic CrP 2 monolayer: potential applications in energy storage and conversion. Phys Chem Chem Phys 2023; 25:24705-24711. [PMID: 37668165 DOI: 10.1039/d3cp02917d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Phosphorus-rich compounds have emerged as a promising class of energy storage and conversion materials due to their interesting structures and electrochemical properties. Herein, we propose that a metallic CrP2 monolayer, isomorphic to 1H-phase MoS2, is a good prospect as an anode for K-ion batteries and a catalyst for hydrogen evolution through first-principles calculations. The CrP2 monolayer demonstrates not only a desirable high K storage capacity (940 mA h g-1) but also a low K-ion diffusion barrier (0.10 eV) and average open circuit voltage (0.40 V). On the other hand, its Gibbs free energy (0.02 eV)/active site density is superior/comparable to that of commercial Pt, resulting from the contribution of the lone pair electrons of the P atom. Its high structural stability and intrinsic metallicity can ensure high safety and performance during the cyclic process. These interesting properties make the CrP2 monolayer a promising multifunctional material for energy storage and conversion devices.
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Affiliation(s)
- Jiayu Gao
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
| | - Wenyuan Zhang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
| | - Xu Yan
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
| | - Xiaohua Zhang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
| | - Sheng Wang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
| | - Guochun Yang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.
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13
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Wang X, Zhao X, Guo S, Weller D, Quan S, Wu M, Liu W, Liu R. Visualized and Nondestructive Quality Identification of Two-Dimensional MoS 2 Based on Principal Component Analysis. J Phys Chem Lett 2023; 14:8088-8094. [PMID: 37656910 DOI: 10.1021/acs.jpclett.3c02093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/03/2023]
Abstract
To date, the common quality characterizations for MoS2 are inefficient or cause irreversible damage to the samples, which have limited scalability and low throughput. Here, we propose a visualized and nondestructive approach to evaluate the quality of MoS2 based on the PCA machine learning method. Through PCA processing of PL mapping, the CVD grown MoS2 with different edge defect densities can be well distinguished. Furthermore, six twin GBs along the sulfur zigzag direction of the six pointed MoS2 stars are also successfully identified. To verify the correctness of the identification results, we measured the lifetime mapping and thermal expansion coefficient of the synthesized MoS2 samples. It is found that the high quality MoS2 samples have a shorter carrier lifetime (∼0.291 ns) and lower thermal expansion coefficient (∼2.03 × 10-5K-1). Therefore, our work offers a new approach to evaluate the quality of MoS2 to drive their practical application.
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Affiliation(s)
- Xuefeng Wang
- School of Science, Department of Optoelectronic Science, Harbin Institute of Technology at Weihai, Weihai 264209, P. R. China
| | - Xiaoyu Zhao
- School of Science, Department of Optoelectronic Science, Harbin Institute of Technology at Weihai, Weihai 264209, P. R. China
| | - Shuai Guo
- School of Science, Department of Optoelectronic Science, Harbin Institute of Technology at Weihai, Weihai 264209, P. R. China
| | - Dieter Weller
- Faculty of Physics and Center for Nanointegration (CENIDE), University of Duisburg-Essen, Duisburg 47057, Germany
| | - Sufeng Quan
- School of Science, Department of Optoelectronic Science, Harbin Institute of Technology at Weihai, Weihai 264209, P. R. China
| | - Mengxuan Wu
- School of Science, Department of Optoelectronic Science, Harbin Institute of Technology at Weihai, Weihai 264209, P. R. China
| | - Wenjun Liu
- School of Science, Department of Optoelectronic Science, Harbin Institute of Technology at Weihai, Weihai 264209, P. R. China
| | - Ruibin Liu
- Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, Beijing 100081, P. R. China
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14
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He Q, Sheng B, Zhu K, Zhou Y, Qiao S, Wang Z, Song L. Phase Engineering and Synchrotron-Based Study on Two-Dimensional Energy Nanomaterials. Chem Rev 2023; 123:10750-10807. [PMID: 37581572 DOI: 10.1021/acs.chemrev.3c00389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
In recent years, there has been significant interest in the development of two-dimensional (2D) nanomaterials with unique physicochemical properties for various energy applications. These properties are often derived from the phase structures established through a range of physical and chemical design strategies. A concrete analysis of the phase structures and real reaction mechanisms of 2D energy nanomaterials requires advanced characterization methods that offer valuable information as much as possible. Here, we present a comprehensive review on the phase engineering of typical 2D nanomaterials with the focus of synchrotron radiation characterizations. In particular, the intrinsic defects, atomic doping, intercalation, and heterogeneous interfaces on 2D nanomaterials are introduced, together with their applications in energy-related fields. Among them, synchrotron-based multiple spectroscopic techniques are emphasized to reveal their intrinsic phases and structures. More importantly, various in situ methods are employed to provide deep insights into their structural evolutions under working conditions or reaction processes of 2D energy nanomaterials. Finally, conclusions and research perspectives on the future outlook for the further development of 2D energy nanomaterials and synchrotron radiation light sources and integrated techniques are discussed.
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Affiliation(s)
- Qun He
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Beibei Sheng
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Kefu Zhu
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Yuzhu Zhou
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Sicong Qiao
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Zhouxin Wang
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Li Song
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, China
- Zhejiang Institute of Photonelectronics, Jinhua, Zhejiang 321004, China
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15
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Hou Z, Cui C, Li Y, Gao Y, Zhu D, Gu Y, Pan G, Zhu Y, Zhang T. Lattice-Strain Engineering for Heterogenous Electrocatalytic Oxygen Evolution Reaction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209876. [PMID: 36639855 DOI: 10.1002/adma.202209876] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 01/06/2023] [Indexed: 06/17/2023]
Abstract
The energy efficiency of metal-air batteries and water-splitting techniques is severely constrained by multiple electronic transfers in the heterogenous oxygen evolution reaction (OER), and the high overpotential induced by the sluggish kinetics has become an uppermost scientific challenge. Numerous attempts are devoted to enabling high activity, selectivity, and stability via tailoring the surface physicochemical properties of nanocatalysts. Lattice-strain engineering as a cutting-edge method for tuning the electronic and geometric configuration of metal sites plays a pivotal role in regulating the interaction of catalytic surfaces with adsorbate molecules. By defining the d-band center as a descriptor of the structure-activity relationship, the individual contribution of strain effects within state-of-the-art electrocatalysts can be systematically elucidated in the OER optimization mechanism. In this review, the fundamentals of the OER and the advancements of strain-catalysts are showcased and the innovative trigger strategies are enumerated, with particular emphasis on the feedback mechanism between the precise regulation of lattice-strain and optimal activity. Subsequently, the modulation of electrocatalysts with various attributes is categorized and the impediments encountered in the practicalization of strained effect are discussed, ending with an outlook on future research directions for this burgeoning field.
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Affiliation(s)
- Zhiqian Hou
- 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, Beijing, 100049, P. R. China
| | - Chenghao Cui
- 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, Beijing, 100049, P. R. China
| | - Yanni Li
- 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, Beijing, 100049, P. R. China
| | - Yingjie Gao
- 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, Beijing, 100049, P. R. China
| | - Deming Zhu
- 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, Beijing, 100049, P. R. China
| | - Yuanfan Gu
- 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, Beijing, 100049, P. R. China
| | - Guoyu Pan
- 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, Beijing, 100049, P. R. China
| | - Yaqiong Zhu
- 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, Beijing, 100049, P. R. China
| | - Tao Zhang
- 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, Beijing, 100049, P. R. China
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16
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Liu W, Zheng X, Xu Q. Supercritical CO 2 Directional-Assisted Synthesis of Low-Dimensional Materials for Functional Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301097. [PMID: 37093220 DOI: 10.1002/smll.202301097] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 04/07/2023] [Indexed: 05/03/2023]
Abstract
Supercritical CO2 (SC CO2 ), as one of the unique fluids that possess fascinating properties of gas and liquid, holds great promise in chemical reactions and fabrication of materials. Building special nanostructures via SC CO2 for functional applications has been the focus of intense research for the past two decades, with facile regulated reaction conditions and a particular reaction field to operate compared to the more widely used solvent systems. In this review, the significance of SC CO2 on fabricating various functional materials including modification of 1D carbon nanotubes, 2D materials, and 2D heterostructures is stated. The fundamental aspects involving building special nanostructures via SC CO2 are explored: how their structure, morphology, and chemical composition be affected by the SC CO2 . Various optimization strategies are outlined to improve their performances, and recent advances are combined to present a coherent understanding of the mechanism of SC CO2 acting on these functional nanostructures. The wide applications of these special nanostructures in catalysis, biosensing, optoelectronics, microelectronics, and energy transformation are discussed. Moreover, the current status of SC CO2 research, the existing scientific issues, and application challenges, as well as the possible future directions to advance this fertile field are proposed in this review.
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Affiliation(s)
- Wei Liu
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450052, P. R. China
| | - Xiaoli Zheng
- College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Qun Xu
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450052, P. R. China
- College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
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17
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Sakhraoui T. Effect of vacancy defect and strain on the structural, electronic and magnetic properties of carbon nitride 2D monolayers by DFTB method. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 35. [PMID: 37183456 DOI: 10.1088/1361-648x/acd293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 05/04/2023] [Indexed: 05/16/2023]
Abstract
We investigate the electronic and magnetic properties of CnNm(C6N6, C2N, C3N and C3N4) using density functional tight-binding (DFTB) method. We find that these compounds are dynamically stable and their electronic band gaps are in the range of 0.59-3.28 eV. We show that the electronic structure is modulated by strain and the semiconducting behavior is well preserved except for C3N at +5% biaxial strain, where a transition from semiconductor to metal was observed. Under +3% biaxial strain, C3N4undergoes a transition from an indirect (K-Γ) to a direct (Γ-Γ) band gap. Moreover, band gap of C2N transforms from direct (Γ-Γ) to indirect (M-Γ) under +4% biaxial strain. However, no change in the nature of the band gap of C6N6. Further, when the studied materials under uniaxial tensile strain, their bandgaps reduce. Our theoretical study showed that an indirect-to-direct nature transition may occur for C6N6and for C3N4, which broadens their applications. On the other hand, magnetism is observed in all N-vacancy defected CnNm, which encourages its application in spintronic. Moreover, calculations of formation energies indicate that N-vacancy is energetically more favorable than C-vacancy in both C2N and C3N4. Opposite behavior found for C6N6and C3N.
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Affiliation(s)
- Taoufik Sakhraoui
- Department of Physics, Faculty of Science, University of Ostrava, 30. Dubna 22, 701 03 Ostrava, Czech Republic
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18
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Thomas S, Mayr F, Kulangara Madam A, Gagliardi A. Machine learning and DFT investigation of CO, CO 2 and CH 4 adsorption on pristine and defective two-dimensional magnesene. Phys Chem Chem Phys 2023; 25:13170-13182. [PMID: 37129598 DOI: 10.1039/d3cp00613a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Adsorption study of environmentally toxic small gas molecules on two-dimensional (2D) materials plays a significant role in analyzing the performance of sensors. In this work, density functional theory (DFT) and machine learning (ML) techniques have been employed to systematically study the adsorption properties of CO, CO2, and CH4 gas molecules on the pristine and defective planar magnesium monolayer, known as magnesene (2D-Mg). The DFT analysis showed that mechanically robust 2D-Mg retains its metallicity in the presence of both mono and di-vacancy defects. Our observations have shown that 2D-Mg, whether defective or pristine, exhibits distinct adsorption behaviors towards CO, CO2, and CH4 gas molecules, including varying chemisorption and physisorption, charge transfer, and distance from the gas molecules. When analyzing the recovery time of gas molecules at room temperature, it is clear that adsorption energy has a direct correlation with the adsorption-desorption cycles, and CH4 possesses an ultra-low recovery time (15.27 ps) compared to CO2 (1.04 ns) and CO (0.90 μs) molecules. The analysis showed that defects do not have a significant impact on the work function of 2D-Mg. However, the work function decreased upon adsorption of CH4, resulting in improved sensitivity due to changes in the electronic properties. Additionally, we explored supervised ML regression models to evaluate their ability to act as a surrogate for the DFT-based adsorption energy calculation. Using both system statistics and smooth overlap of atomic position (SOAP)-based featurization, we observed that adsorption energies can be predicted with a mean absolute error of 0.10 eV.
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Affiliation(s)
- Siby Thomas
- School of Computation, Information and Technology (SoCIT), Technical University of Munich (TUM), Hans-Piloty-Strasse 1, 85748 Garching, Munich, Germany.
| | - Felix Mayr
- School of Computation, Information and Technology (SoCIT), Technical University of Munich (TUM), Hans-Piloty-Strasse 1, 85748 Garching, Munich, Germany.
| | - Ajith Kulangara Madam
- Department of Physics, National Institute of Technology Karnataka (NITK), Surathkal, PO: Srinivasnagar-575025, Mangalore, Karnataka, India
| | - Alessio Gagliardi
- School of Computation, Information and Technology (SoCIT), Technical University of Munich (TUM), Hans-Piloty-Strasse 1, 85748 Garching, Munich, Germany.
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19
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Giri A, Park G, Jeong U. Layer-Structured Anisotropic Metal Chalcogenides: Recent Advances in Synthesis, Modulation, and Applications. Chem Rev 2023; 123:3329-3442. [PMID: 36719999 PMCID: PMC10103142 DOI: 10.1021/acs.chemrev.2c00455] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Indexed: 02/01/2023]
Abstract
The unique electronic and catalytic properties emerging from low symmetry anisotropic (1D and 2D) metal chalcogenides (MCs) have generated tremendous interest for use in next generation electronics, optoelectronics, electrochemical energy storage devices, and chemical sensing devices. Despite many proof-of-concept demonstrations so far, the full potential of anisotropic chalcogenides has yet to be investigated. This article provides a comprehensive overview of the recent progress made in the synthesis, mechanistic understanding, property modulation strategies, and applications of the anisotropic chalcogenides. It begins with an introduction to the basic crystal structures, and then the unique physical and chemical properties of 1D and 2D MCs. Controlled synthetic routes for anisotropic MC crystals are summarized with example advances in the solution-phase synthesis, vapor-phase synthesis, and exfoliation. Several important approaches to modulate dimensions, phases, compositions, defects, and heterostructures of anisotropic MCs are discussed. Recent significant advances in applications are highlighted for electronics, optoelectronic devices, catalysts, batteries, supercapacitors, sensing platforms, and thermoelectric devices. The article ends with prospects for future opportunities and challenges to be addressed in the academic research and practical engineering of anisotropic MCs.
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Affiliation(s)
- Anupam Giri
- Department
of Chemistry, Faculty of Science, University
of Allahabad, Prayagraj, UP-211002, India
| | - Gyeongbae Park
- Department
of Materials Science and Engineering, Pohang
University of Science and Technology, Cheongam-Ro 77, Nam-Gu, Pohang, Gyeongbuk790-784, Korea
- Functional
Materials and Components R&D Group, Korea Institute of Industrial Technology, Gwahakdanji-ro 137-41, Sacheon-myeon, Gangneung, Gangwon-do25440, Republic of Korea
| | - Unyong Jeong
- Department
of Materials Science and Engineering, Pohang
University of Science and Technology, Cheongam-Ro 77, Nam-Gu, Pohang, Gyeongbuk790-784, Korea
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20
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Yu Y, Fan X, Liu S, Yao L. Competition mechanism of exciton decay channels in the stacked multilayer tungsten sulfide. OPTICS EXPRESS 2023; 31:9350-9361. [PMID: 37157507 DOI: 10.1364/oe.484524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The competition mechanism of exciton decay channels in the multilayer TMDs remains poorly understood. Here, the exciton dynamics in the stacked WS2 was studied. The exciton decay processes are divided into the fast and slow decay processes, which are dominated by the exciton-exciton annihilation (EEA) and defect-assisted recombination (DAR), respectively. The lifetime of EEA is on the order of hundreds of femtoseconds (400∼1100 fs). It is decreased initially, followed by an increase with adding layer thickness, which can be attributed to the competition between phonon-assisted effect and defect effect. The lifetime of DAR is on the timescale of hundreds of picoseconds (200∼800 ps), which is determined by the defect density especially in a high injected carrier density.
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21
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Yan X, Zhao Y, Cao G, Li X, Gao C, Liu L, Ahmed S, Altaf F, Tan H, Ma X, Xie Z, Zhang H. 2D Organic Materials: Status and Challenges. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2203889. [PMID: 36683257 PMCID: PMC9982583 DOI: 10.1002/advs.202203889] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 10/31/2022] [Indexed: 06/17/2023]
Abstract
In the past few decades, 2D layer materials have gradually become a central focus in materials science owing to their uniquely layered structural qualities and good optoelectronic properties. However, in the development of 2D materials, several disadvantages, such as limited types of materials and the inability to synthesize large-scale materials, severely confine their application. Therefore, further exploration of new materials and preparation methods is necessary to meet technological developmental needs. Organic molecular materials have the advantage of being customizable. Therefore, if organic molecular and 2D materials are combined, the resulting 2D organic materials would have excellent optical and electrical properties. In addition, through this combination, the free design and large-scale synthesis of 2D materials can be realized in principle. Furthermore, 2D organic materials exhibit excellent properties and unique functionalities along with great potential for developing sensors, biomedicine, and electronics. In this review, 2D organic materials are divided into five categories. The preparation methods and material properties of each class of materials are also described in detail. Notably, to comprehensively understand each material's advantages, the latest research applications for each material are presented in detail and summarized. Finally, the future development and application prospects of 2D organic materials are briefly discussed.
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Affiliation(s)
- Xiaobing Yan
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain‐Like Neuromorphic Devices and Systems of Hebei ProvinceCollege of Electronic and Information EngineeringHebei UniversityBaoding071002China
| | - Ying Zhao
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain‐Like Neuromorphic Devices and Systems of Hebei ProvinceCollege of Electronic and Information EngineeringHebei UniversityBaoding071002China
| | - Gang Cao
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain‐Like Neuromorphic Devices and Systems of Hebei ProvinceCollege of Electronic and Information EngineeringHebei UniversityBaoding071002China
| | - Xiaoyu Li
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain‐Like Neuromorphic Devices and Systems of Hebei ProvinceCollege of Electronic and Information EngineeringHebei UniversityBaoding071002China
| | - Chao Gao
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain‐Like Neuromorphic Devices and Systems of Hebei ProvinceCollege of Electronic and Information EngineeringHebei UniversityBaoding071002China
| | - Luan Liu
- School of Life Sciences, Institute of Life Science and Green Development, Key Laboratory of Brain‐Like Neuromorphic Devices and Systems of Hebei ProvinceCollege of Electronic and Information EngineeringHebei UniversityBaoding071002China
| | - Shakeel Ahmed
- Collaborative Innovation Center for Optoelectronic Science and TechnologyInternational Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060P. R. China
| | - Faizah Altaf
- Department of ChemistryWomen University Bagh Azad KashmirBagh Azad KashmirBagh12500Pakistan
- School of Materials Science and EngineeringGeorgia Institute of Technology North AvenueAtlantaGA30332USA
| | - Hui Tan
- Department of RespiratoryShenzhen Children's HospitalShenzhen518036P. R. China
| | - Xiaopeng Ma
- Department of RespiratoryShenzhen Children's HospitalShenzhen518036P. R. China
| | - Zhongjian Xie
- Institute of PediatricsShenzhen Children's HospitalShenzhenGuangdong518038P. R. China
- Shenzhen International Institute for Biomedical ResearchShenzhenGuangdong518116China
| | - Han Zhang
- Collaborative Innovation Center for Optoelectronic Science and TechnologyInternational Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060P. R. China
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22
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Pressler K, Snoeren TJ, Walsh KM, Gamelin DR. Magnetic Amplification at Yb 3+ "Designer Defects" in the van der Waals Ferromagnet CrI 3. NANO LETTERS 2023; 23:1320-1326. [PMID: 36724213 DOI: 10.1021/acs.nanolett.2c04533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The two-dimensional (2D) van der Waals ferromagnet CrI3 has been doped with the magnetic optical impurity Yb3+ to yield materials that display sharp multiline Yb3+ photoluminescence (PL) controlled by the magnetism of CrI3. Magneto-PL shows that Yb3+ magnetization is pinned to the magnetization of CrI3. An effective internal field of ∼10 T at Yb3+ is estimated, attributed to strong in-plane Yb3+-Cr3+ superexchange coupling. The anomalously low energy of Yb3+ PL in CrI3 reflects relatively high Yb3+-I- covalency, contributing to Yb3+-Cr3+ superexchange coupling. The Yb3+ PL energy and line width both reveal the effects of spontaneous zero-field CrI3 magnetic ordering within 2D layers below TC, despite the absence of net magnetization in multilayer samples. These results illustrate the use of optical impurities as "designer defects" to introduce unique functionality to 2D magnets.
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Affiliation(s)
- Kimo Pressler
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Thom J Snoeren
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Kelly M Walsh
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Daniel R Gamelin
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
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23
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Liang J, Wang Y, Yang Z, Xu LC, Xue L, Liu R, Liu X. A theoretical study on the line defects in β 12-borophene: enhanced direct-current and alternating-current conductances. Phys Chem Chem Phys 2023; 25:6067-6078. [PMID: 36751891 DOI: 10.1039/d2cp04711j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Using density functional theory and the non-equilibrium Green's function method, we theoretically investigated the structures, stabilities, electronic properties, and the direct-current (DC) and alternating-current (AC) transport properties of the line defects in two-dimensional material β12-borophene. Our results suggest that there exist six line defects that can enhance the stability of β12-borophene and the line defects have profound influences on the electronic structure of β12-borophene. Along the zigzag direction, the line defects can change the atomic orbital components of the Dirac cones in perfect β12-borophene, but the line defects along the armchair direction have complicated influences on the Dirac cones. In the case of DC transport, some of the line defects lead to the constant DC phenomenon and the negative differential resistance effect, and enhance the DC conductances since the line defects exhibit typical one-dimensional characteristics. In the case of AC transport, some of the line defects enhance the AC conductances in the medium-frequency and high-frequency ranges through the photon-assisted tunneling effect. The microscopic mechanisms of the enhanced DC and AC conductances are different. In addition, for a low-frequency range, the equivalent circuits of β12-borophene and the line defects were also suggested, which will be beneficial for designing borophene-based functional nanodevices.
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Affiliation(s)
- Jianxin Liang
- College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Yue Wang
- College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Zhi Yang
- College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Li-Chun Xu
- College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Lin Xue
- College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Ruiping Liu
- College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Xuguang Liu
- Key Lab of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China.,College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
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24
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Hu S, Guo R, Gao Y, Chen F. Oxoiron(IV)-dominated Heterogeneous Fenton-like Mechanism of Fe-Doped MoS 2. Chem Asian J 2023; 18:e202201134. [PMID: 36459407 DOI: 10.1002/asia.202201134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/01/2022] [Accepted: 12/01/2022] [Indexed: 12/04/2022]
Abstract
Oxoiron(IV) species are a critical intermediate in the Fe-based Fenton-like process at circumneutral pH, and its oxidative reactivity is closely related to the ligands. An optional inorganic host material, MoS2 , is selected to construct a highly reactive sulfur ligand coordinated Fe species in this work. The Fe species doped in MoS2 is presented as the FeII centre and triggers the transformation of the 2H phase to the octahedral 1T phase MoS2 . The role of the interaction between doped Fe and the MoS2 host lattice on the formation of oxoiron(IV) is studied. A significant Fenton-like reactivity and a remarkable accumulation of oxoiron(IV) species were observed for Fe-MoS2 . The quenching experiment was implemented to disclose the predominant role of oxoiron(IV) species in the Fe-MoS2 /H2 O2 Fenton-like system. Furthermore, oxoiron(IV) species could transform into the ⋅O2 - and 1 O2 , which further expedites the Fenton-like reaction.
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Affiliation(s)
- Shiyu Hu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, 200237, Shanghai, P. R. China
| | - Rujia Guo
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, 200237, Shanghai, P. R. China
| | - Yiqian Gao
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, 200237, Shanghai, P. R. China
| | - Feng Chen
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, 200237, Shanghai, P. R. China
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25
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Sulfur ligated oxoiron(IV) centre in fenton-like reaction: Theoretical postulation and experimental verification. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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26
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Cu/CuOx@C Composite as a High-Efficiency Electrocatalyst for Oxygen Reduction Reactions. Catalysts 2022. [DOI: 10.3390/catal12121515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Among clean energy transformation devices, fuel cells have gained special attention over the past years; however, advancing appropriate non-valuable metal impetuses to halfway supplant the customary Pt/C impetus is still in progress. In this paper, we propose a specific electrocatalyst in the formula of highly-active Cu species, associated with coated carbon (Cu@C-800), for oxygen reduction reaction (ORR) through post-treatment of a self-assembled precursor. The optimized catalyst Cu@C-800 showed excellent ORR performance (i.e., the onset potential was 1.00 V vs. RHE, and half-wave potential of 0.81 V vs. RHE), high stability, resistance to methanol, and high four-electron selectivity. The enhancement is attributed to the synergy between the carbon matrix and a high explicit surface region and rich Cu nano-species.
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27
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Computational Insight into Defective Boron Nitride Supported Double-Atom Catalysts for Electrochemical Nitrogen Reduction. Catalysts 2022. [DOI: 10.3390/catal12111404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Designing highly selective and efficient double-atom electrocatalysts (DACs) is essential for achieving a superior nitrogen-reduction reaction (NRR) performance. Herein, we explored the defective boron nitride–supported cage-like double-atom catalysts to rummage the qualified NRR catalysts. Based on a systematic evaluation of the stability, N2 adsorption, NRR selectivity and activity of 10 DACs of TM1-TM2@VB-BN, we predicted Ru-Ti@VB-BN to be the NRR candidate with a limiting potential of −0.40 V. Compared to the corresponding single-atom catalysts, the introduction of Ti/Mo modulates the d-band center of the active metal atom, which improves the NRR performance. Moreover, the magnetic Ru-Ti dimer can facilitate the transfer of charge to molecular N2, ensuring a significant activation of the inert N≡N bond. This research not only opens up new avenues for designing boron nitride–supported DACs for NRR, but also deepens the understanding of DACs in N2 activation.
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28
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Qian C, Shao W, Zhang X, Mu X, Gu X, Yu M, Ma L, Liu S, Mu S. Competitive Coordination-Pairing between Ru Clusters and Single-Atoms for Efficient Hydrogen Evolution Reaction in Alkaline Seawater. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2204155. [PMID: 36050884 DOI: 10.1002/smll.202204155] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/31/2022] [Indexed: 06/15/2023]
Abstract
The coordination environment of Ru centers determines their catalytic performance, however, much less attention is focused on cluster-induced charge transfer in a Ru single-atom system. Herein, by density functional theory (DFT) calculations, a competitive coordination-pairing between Ru clusters (RuRu bond) and single-atoms (RuO bond) is revealed leading to the charge redistribution between Ru and O atoms in ZnFe2 O4 units which share more free electrons to participate in the hydrogen desorption process, optimizing the proton adsorption and hydrogen desorption. Thus, a clicking confinement strategy for building a competitive coordination-pairing between Ru clusters and single-atoms anchored on ZnFe2 Ox nanosheets over carbon via RuO ligand (Ru1, n -ZnFe2 Ox -C) is proposed. Benefiting from the optimized coordination effect and the electronic synergy between Ru clusters and single-atoms, such a catalyst demonstrates the excellent activity and excellent stability in alkaline and seawater media, which has exceptional hydrogen evolution reaction activity with overpotentials as low as 10.1 and 15.9 mV to reach the current density of 10 mA cm-2 in alkaline and seawater media, respectively, higher than that of commercial Pt/C catalysts as a benchmark. Furthermore, it owns remarkably outstanding mass activity, approximately 2 and 8 times higher than that of Pt catalysts in alkaline and seawater media, respectively.
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Affiliation(s)
- Chunzhu Qian
- Key Laboratory of Advanced Functional Materials of Nanjing, Nanjing Xiaozhuang University, Nanjing, 211171, China
| | - Wenqian Shao
- Key Laboratory of Advanced Functional Materials of Nanjing, Nanjing Xiaozhuang University, Nanjing, 211171, China
| | - Xingyue Zhang
- Key Laboratory of Advanced Functional Materials of Nanjing, Nanjing Xiaozhuang University, Nanjing, 211171, China
| | - Xueqin Mu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
| | - Xiangyao Gu
- Key Laboratory of Advanced Functional Materials of Nanjing, Nanjing Xiaozhuang University, Nanjing, 211171, China
| | - Min Yu
- Key Laboratory of Advanced Functional Materials of Nanjing, Nanjing Xiaozhuang University, Nanjing, 211171, China
| | - Ligang Ma
- Key Laboratory of Advanced Functional Materials of Nanjing, Nanjing Xiaozhuang University, Nanjing, 211171, China
| | - Suli Liu
- Key Laboratory of Advanced Functional Materials of Nanjing, Nanjing Xiaozhuang University, Nanjing, 211171, China
| | - Shichun Mu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu hydrogen Valley, Foshan, 528200, China
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29
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Xu H, Ding B, Xu Y, Huang Z, Wei D, Chen S, Lan T, Pan Y, Cheng HM, Liu B. Magnetically tunable and stable deep-ultraviolet birefringent optics using two-dimensional hexagonal boron nitride. NATURE NANOTECHNOLOGY 2022; 17:1091-1096. [PMID: 35953540 DOI: 10.1038/s41565-022-01186-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
Birefringence is a fundamental optical property that can induce phase retardation of polarized light. Tuning the birefringence of liquid crystals is a core technology for light manipulation in current applications in the visible and infrared spectral regions. Due to the strong absorption or instability of conventional liquid crystals in deep-ultraviolet light, tunable birefringence remains elusive in this region, notwithstanding its significance in diverse applications. Here we show a stable and birefringence-tunable deep-ultraviolet modulator based on two-dimensional hexagonal boron nitride. It has an extremely large optical anisotropy factor of 6.5 × 10-12 C2 J-1 m-1 that gives rise to a specific magneto-optical Cotton-Mouton coefficient of 8.0 × 106 T-2 m-1, which is about five orders of magnitude higher than other potential deep-ultraviolet-transparent media. The large coefficient, high stability (retention rate of 99.7% after 270 cycles) and wide bandgap of boron nitride collectively enable the fabrication of stable deep-ultraviolet modulators with magnetically tunable birefringence.
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Affiliation(s)
- Hao Xu
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Baofu Ding
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Shenzhen International Graduate School, Tsinghua University, Shenzhen, China.
- Institute of Technology for Carbon Neutrality/Faculty of Materials Science and Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
| | - Youan Xu
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
- Xi'an Research Institute of High Technology, Xi'an, China
| | - Ziyang Huang
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Dahai Wei
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China
| | - Shaohua Chen
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Tianshu Lan
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Yikun Pan
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Hui-Ming Cheng
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Shenzhen International Graduate School, Tsinghua University, Shenzhen, China.
- Institute of Technology for Carbon Neutrality/Faculty of Materials Science and Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China.
- Advanced Technology Institute, University of Surrey, Guildford, UK.
| | - Bilu Liu
- Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute & Institute of Materials Research, Shenzhen International Graduate School, Tsinghua University, Shenzhen, China.
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30
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Zhao C, Xu W, Ren J, He L, Wu C, Jia W, Ye D, Zhou H, Hu C, Yu T, Luo X, Yuan C. Efficient Charge Transfers in Highly Conductive Copper Selenide Quantum Dot-Confined Catalysts for Robust Oxygen Evolution Reaction. Inorg Chem 2022; 61:14455-14461. [PMID: 36040248 DOI: 10.1021/acs.inorgchem.2c02422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Defective quantum dots (QDs) are the emerging materials for catalysis by virtue of their atomic-scale size, high monodispersity, and ultra-high specific surface area. However, the dispersed nature of QDs fundamentally prohibits the efficient charge transfer in various catalytic processes. Here, we report efficient and robust electrocatalytic oxygen evolution based on defective and highly conductive copper selenide (CuSe) QDs confined in an amorphous carbon matrix with good uniformity (average diameter 4.25 nm) and a high areal density (1.8 × 1012 cm-2). The CuSe QD-confined catalysts with abundant selenide vacancies were prepared by using a pulsed laser deposition system benefitted by high substrate temperature and ultrahigh vacuum growth conditions, as evidenced by electron paramagnetic resonance characterizations. An ultra-low charge transfer resistance (about 7 Ω) determined by electrochemical impedance spectroscopy measurement indicates the efficient charge transfer of CuSe quantum-confined catalysts, which is guaranteed by its high conductivity (with a low resistivity of 2.33 μΩ·m), as revealed by electrical transport measurements. Our work provides a universal design scheme of the dispersed QD-based composite catalysts and demonstrates the CuSe QD-confined catalysts as an efficient and robust electrocatalyst for oxygen evolution reaction.
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Affiliation(s)
- Chenya Zhao
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China.,School of Physics, Communication and Electronics, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China
| | - Weiyang Xu
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China.,School of Physics, Communication and Electronics, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China
| | - Jie Ren
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China.,School of Physics, Communication and Electronics, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China
| | - Lanshan He
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China.,School of Physics, Communication and Electronics, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China
| | - Congcong Wu
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China.,School of Physics, Communication and Electronics, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China
| | - Wenting Jia
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China.,School of Physics, Communication and Electronics, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China
| | - Daojian Ye
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China.,School of Physics, Communication and Electronics, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China
| | - Hang Zhou
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China.,School of Physics, Communication and Electronics, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China
| | - Ce Hu
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China.,Analytical & Testing Center, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China
| | - Ting Yu
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China.,School of Physics, Communication and Electronics, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China
| | - Xingfang Luo
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China.,School of Physics, Communication and Electronics, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China
| | - Cailei Yuan
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China.,School of Physics, Communication and Electronics, Jiangxi Normal University, 99 Ziyang Avenue, Nanchang, Jiangxi 330022, China
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31
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Liu Y, Zhang W, Zheng W. Quantum Dots Compete at the Acme of MXene Family for the Optimal Catalysis. NANO-MICRO LETTERS 2022; 14:158. [PMID: 35916985 PMCID: PMC9346050 DOI: 10.1007/s40820-022-00908-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 06/25/2022] [Indexed: 05/05/2023]
Abstract
It is well known that two-dimensional (2D) MXene-derived quantum dots (MQDs) inherit the excellent physicochemical properties of the parental MXenes, as a Chinese proverb says, "Indigo blue is extracted from the indigo plant, but is bluer than the plant it comes from." Therefore, 0D QDs harvest larger surface-to-volume ratio, outstanding optical properties, and vigorous quantum confinement effect. Currently, MQDs trigger enormous research enthusiasm as an emerging star of functional materials applied to physics, chemistry, biology, energy conversion, and storage. Since the surface properties of small-sized MQDs include the type of surface functional groups, the functionalized surface directly determines their performance. As the Nobel Laureate Wolfgang Pauli says, "God made the bulk, but the surface was invented by the devil," and it is just on the basis of the abundant surface functional groups, there is lots of space to be thereof excavated from MQDs. We are witnessing such excellence and even more promising to be expected. Nowadays, MQDs have been widely applied to catalysis, whereas the related reviews are rarely reported. Herein, we provide a state-of-the-art overview of MQDs in catalysis over the past five years, ranging from the origin and development of MQDs, synthetic routes of MQDs, and functionalized MQDs to advanced characterization techniques. To explore the diversity of catalytic application and perspectives of MQDs, our review will stimulate more efforts toward the synthesis of optimal MQDs and thereof designing high-performance MQDs-based catalysts.
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Affiliation(s)
- Yuhua Liu
- Key Laboratory of Automobile Materials MOE, and School of Materials Science and Engineering, and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, and Electron Microscopy Center, and International Center of Future Science, Jilin University, Changchun, 130012, People's Republic of China
| | - Wei Zhang
- Key Laboratory of Automobile Materials MOE, and School of Materials Science and Engineering, and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, and Electron Microscopy Center, and International Center of Future Science, Jilin University, Changchun, 130012, People's Republic of China.
| | - Weitao Zheng
- Key Laboratory of Automobile Materials MOE, and School of Materials Science and Engineering, and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, and Electron Microscopy Center, and International Center of Future Science, Jilin University, Changchun, 130012, People's Republic of China.
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32
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Cui X, Gao L, Lu CH, Ma R, Yang Y, Lin Z. Rational coordination regulation in carbon-based single-metal-atom catalysts for electrocatalytic oxygen reduction reaction. NANO CONVERGENCE 2022; 9:34. [PMID: 35867176 PMCID: PMC9307705 DOI: 10.1186/s40580-022-00324-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 07/07/2022] [Indexed: 05/27/2023]
Abstract
Single-metal-atom catalysts (SMACs) have garnered extensive attention for various electrocatalytic applications, owing to their maximum atom-utilization efficiency, tunable electronic structure, and remarkable catalytic performance. In particular, carbon-based SMACs exhibit optimal electrocatalytic activity for the oxygen reduction reaction (ORR) which is of paramount importance for several sustainable energy conversion and generation technologies, such as fuel cells and metal-air batteries. Despite continuous endeavors in developing various advanced carbon-based SMACs for electrocatalytic ORR, the rational regulation of coordination structure and thus the electronic structure of carbon-based SMACs remains challenging. In this review, we critically examine the role of coordination structure, including local coordination structure (i.e., metal atomic centers and the first coordination shell) and extended local coordination structure (i.e., the second and higher coordination shells), on the rational design of carbon-based SMACs for high-efficiency electrocatalytic ORR. Insights into the relevance between coordination structures and their intrinsic ORR activities are emphatically exemplified and discussed. Finally, we also propose the major challenges and future perspectives in the rational design of advanced carbon-based SMACs for electrocatalytic ORR. This review aims to emphasize the significance of coordination structure and deepen the insightful understanding of structure-performance relationships.
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Affiliation(s)
- Xun Cui
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Key Laboratory of Functional Geomaterials in China Nonmetallic Minerals Industry, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China
| | - Likun Gao
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin, 150040, China.
| | - Cheng-Hsin Lu
- Instrumentation Center, National Tsing Hua University, Hsinchu, 300044, Taiwan, China
| | - Rui Ma
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education, Hubei Key Laboratory of Catalysis and Materials Science, South-Central Minzu University, Wuhan, 430074, China
| | - Yingkui Yang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education, Hubei Key Laboratory of Catalysis and Materials Science, South-Central Minzu University, Wuhan, 430074, China
| | - Zhiqun Lin
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585, Singapore, Singapore.
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33
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Göhler F, Ramasubramanian S, Rajak SK, Rösch N, Schütze A, Wolff S, Cordova DLM, Johnson DC, Seyller T. Modulation doping and charge density wave transition in layered PbSe-VSe 2 ferecrystal heterostructures. NANOSCALE 2022; 14:10143-10154. [PMID: 35796182 DOI: 10.1039/d2nr01071b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Controlling charge carrier concentrations remains a major challenge in the application of quasi-two-dimensional materials. A promising approach is the modulation doping of transport channels via charge transfer from neighboring layers in stacked heterostructures. Ferecrystals, which are metastable layered structures created from artificial elemental precursors, are a perfect model system to investigate modulation doping, as they offer unparalleled freedom in the combination of different constituents and variable layering sequences. In this work, differently stacked combinations of rock-salt structured PbSe and VSe2 were investigated using X-ray photoelectron spectroscopy. The PbSe layers act as electron donors in all heterostructures, with about 0.1 to 0.3 donated electrons per VSe2 unit cell. While they initially retain their inherent semiconducting behavior, they themselves become metallic when combined with a larger number of VSe2 layers, as evidenced by a change of the XPS core level lineshape. Additional analysis of the valence band structure was performed for selected stacking orders at different sample temperatures to investigate a predicted charge density wave (CDW) transition. While there appear to be hints of a gap opening, the data so far is inconclusive and the application of spatially resolved techniques such as scanning tunneling microscopy is encouraged for further studies.
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Affiliation(s)
- Fabian Göhler
- Institute of Physics, Chemnitz University of Technology, 09126 Chemnitz, Germany.
- Center for Materials, Architectures and Integration of Nanomembranes (MAIN), 09126 Chemnitz, Germany
| | | | - Sanam Kumari Rajak
- Institute of Physics, Chemnitz University of Technology, 09126 Chemnitz, Germany.
| | - Niels Rösch
- Institute of Physics, Chemnitz University of Technology, 09126 Chemnitz, Germany.
| | - Adrian Schütze
- Institute of Physics, Chemnitz University of Technology, 09126 Chemnitz, Germany.
- Center for Materials, Architectures and Integration of Nanomembranes (MAIN), 09126 Chemnitz, Germany
| | - Susanne Wolff
- Institute of Physics, Chemnitz University of Technology, 09126 Chemnitz, Germany.
- Center for Materials, Architectures and Integration of Nanomembranes (MAIN), 09126 Chemnitz, Germany
| | | | - David C Johnson
- Department of Chemistry, University of Oregon, Eugene, Oregon 97401, USA
| | - Thomas Seyller
- Institute of Physics, Chemnitz University of Technology, 09126 Chemnitz, Germany.
- Center for Materials, Architectures and Integration of Nanomembranes (MAIN), 09126 Chemnitz, Germany
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Huang TX, Yang M, Giang H, Dong B, Fang N. Resolving the Heterogeneous Adsorption of Antibody Fragment on a 2D Layered Molybdenum Disulfide by Super-Resolution Imaging. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:7455-7461. [PMID: 35676767 DOI: 10.1021/acs.langmuir.2c00420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The development of nanomaterials such as two-dimensional (2D) layered materials advanced applications in many fields, including biosensors format based on field-effect transistors. The unique physical and chemical properties of 2D layered materials enable the detection limit of biomolecules as low as ∼1 pg/mL. The majority of 2D layered materials contain different structural features and defects introduced in chemical synthesis and fabrication processing. These structural features have different physicochemical properties, causing heterogeneous adsorption of bioreceptors like antibodies, enzymes, etc. Understanding the correlation between the adsorption of bioreceptors and properties of structural features is essential for building highly efficient, sensitive biosensors based on 2D layered materials. Here, we utilize a single-molecule localization-based super-resolved fluorescence imaging method to unveil the inhomogeneous adsorption of antibody fragments on 2D layered molybdenum disulfide (MoS2). The surface coverage of antibody fragments on MoS2 thin flakes is quantitatively measured and compared at different structural features and different layer thicknesses. The methodology in the current work can be extended to study bioreceptor adsorption on other types of 2D layered materials and pave a way to improve biosensors' sensitivity based on defect engineering 2D layered materials.
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Affiliation(s)
- Teng-Xiang Huang
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Meek Yang
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Hannah Giang
- Department of Chemistry, Southern Illinois University Carbondale, Carbondale, Illinois 62901, United Stated
| | - Bin Dong
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Ning Fang
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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35
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Deng W, Gai Y, Duan H, Chen Z, Hu X, Han S, Xu N, Qiao S, Yao Z, Jiang F. Partially delocalized charge in crystalline Co-S-Se/NiO x nanocomposites for boosting electrocatalytic oxygen evolution. Phys Chem Chem Phys 2022; 24:10838-10850. [PMID: 35506176 DOI: 10.1039/d1cp05350g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Although reasonably specified and adjustable preparation of nanostructures with specific morphologies, ordered chemical compositions and electronic structures involving advanced energy chemistries is an important research area, high-efficiency, stable, and low-cost electrocatalysts for water splitting are greatly desirable and challenging. In this study, partially delocalized Co-S-Se ultra-thin nanosheets are obtained via a liquid-liquid interface-mediated strategy at an oil-water interface. These Co-S-Se ultra-thin nanosheets exhibit different-sized lamellar structures and have an average thickness of 0.83 nm. The ternary ultra-thin Co0.45S0.38Se0.17 nanosheets demonstrate excellent performance for the OER, accompanied by an overpotential of 290 mV (1.52 V vs. RHE) at 10 mA cm-2, and a Tafel slope of 74.5 mV dec-1. In the meantime, the catalyst recombined with a stoichiometry NiOx catalyst to form a composite interface, which also exhibited a good OER performance, with an overpotential of 260 mV at 10 mA cm-2 and a smaller Tafel slope of 53.9 mV dec-1. The nanosheets can rearrange the electronic density near the metal catalytic centers and increase the electron transfer. DFT calculations indicate that the partially delocalized charges can improve electrocatalytic performances, demonstrating modulated electroreduction properties. Due to the special atomic and electronic structure of the ternary transition metal alloy chalcogenide, the compound has great potential for energy storage, which will help in the rational design and synthesis of high-efficiency electrocatalysts.
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Affiliation(s)
- Wei Deng
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Yuping Gai
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Haitao Duan
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Zhide Chen
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Xiaojun Hu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Sheng Han
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Niwei Xu
- College of Medicine Engineering, Hunan Traditional Chinese Medical College, Xueshi Road 300, Hunan 410208, China
| | - Shanlin Qiao
- College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Yuxiang Street 26, Shijiazhuang 050018, China.
| | - Zijian Yao
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
| | - Fei Jiang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Haiquan Road 100, Shanghai 201418, China.
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37
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Yan G, Wu T, Xing S, Chen F, Zhao B, Gao W. Ultrathin Ce-doped La 2O 3nanofilm electrocatalysts for efficient oxygen evolution reactions. NANOTECHNOLOGY 2022; 33:245405. [PMID: 35255487 DOI: 10.1088/1361-6528/ac5b55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 03/07/2022] [Indexed: 06/14/2023]
Abstract
It is still highly desired to develop efficient, resource-abundant and inexpensive electrocatalysts to improve the sluggish kinetics of oxygen evolution reaction (OER) in electrochemical water splitting systems. In this work, the large-area ultrathin (2.52 nm thick) Ce-doped La2O3nanofilms were developed via a facile and reliable ionic layer epitaxy method with different Ce content. The ultrathin Ce-doped La2O3nanofilm with optimum composition of La1.22Ce0.78O3exhibited an excellent OER performance with a very low overpotential of 221 mV at 10 mA cm-2and a small Tafel slope of 33.7 mV dec-1. A remarkable high mass activity of 6263.2 A g-1was also obtained from ultrathin La1.22Ce0.78O3nanofilm at the overpotential of 221 mV. Such a high mass activity was three orders of magnitude higher than state-of-the-art commercial IrO2powders (3.8 A g-1) and more than 30 times higher than La2O3nanofilm (196.7 A g-1) without Ce doping at the same overpotential. This high mass activity was even significantly higher than other recently reported typical OER catalysts. The substantial OER performance gain by the Ce doping was attributed to the improved conductivity and electrochemical active surface areas of nanofilms as a result of favorable tuning on the charge transfer and electronic structures. This work provides a promising approach to develop high-performance two-dimensional (2D) electrocatalysts by effective heteroatom doping strategy.
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Affiliation(s)
- Guangyuan Yan
- School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, People's Republic of China
| | - Tong Wu
- School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, People's Republic of China
| | - Shuming Xing
- School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, People's Republic of China
| | - Fei Chen
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China
| | - Biwei Zhao
- School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, People's Republic of China
| | - Wenjing Gao
- School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, People's Republic of China
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38
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Ippolito S, Samorì P. Defect Engineering Strategies Toward Controlled Functionalization of Solution‐Processed Transition Metal Dichalcogenides. SMALL SCIENCE 2022. [DOI: 10.1002/smsc.202100122] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- Stefano Ippolito
- CNRS ISIS UMR 7006 University of Strasbourg 8 Allée Gaspard Monge 67000 Strasbourg France
| | - Paolo Samorì
- CNRS ISIS UMR 7006 University of Strasbourg 8 Allée Gaspard Monge 67000 Strasbourg France
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39
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Wu X, Xiao S, Long Y, Ma T, Shao W, Cao S, Xiang X, Ma L, Qiu L, Cheng C, Zhao C. Emerging 2D Materials for Electrocatalytic Applications: Synthesis, Multifaceted Nanostructures, and Catalytic Center Design. SMALL 2022; 18:e2105831. [PMID: 35102688 DOI: 10.1002/smll.202105831] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 12/23/2021] [Indexed: 02/05/2023]
Abstract
Currently, the development of advanced 2D nanomaterials has become an interdisciplinary subject with extensive studies due to their extraordinary physicochemical performances. Beyond graphene, the emerging 2D-material-derived electrocatalysts (2D-ECs) have aroused great attention as one of the best candidates for heterogeneous electrocatalysis. The tunable physicochemical compositions and characteristics of 2D-ECs enable rational structural engineering at the molecular/atomic levels to meet the requirements of different catalytic applications. Due to the lack of instructive and comprehensive reviews, here, the most recent advances in the nanostructure and catalytic center design and the corresponding structure-function relationships of emerging 2D-ECs are systematically summarized. First, the synthetic pathways and state-of-the-art strategies in the multifaceted structural engineering and catalytic center design of 2D-ECs to promote their electrocatalytic activities, such as size and thickness, phase and strain engineering, heterojunctions, heteroatom doping, and defect engineering, are emphasized. Then, the representative applications of 2D-ECs in electrocatalytic fields are depicted and summarized in detail. Finally, the current breakthroughs and primary challenges are highlighted and future directions to guide the perspectives for developing 2D-ECs as highly efficient electrocatalytic nanoplatforms are clarified. This review provides a comprehensive understanding to engineer 2D-ECs and may inspire many novel attempts and new catalytic applications across broad fields.
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Affiliation(s)
- Xizheng Wu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Department of Ultrasound, West China Hospital, Sichuan University, Chengdu, 610065, China
| | - Sutong Xiao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Department of Ultrasound, West China Hospital, Sichuan University, Chengdu, 610065, China
| | - Yanping Long
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Department of Ultrasound, West China Hospital, Sichuan University, Chengdu, 610065, China
| | - Tian Ma
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Department of Ultrasound, West China Hospital, Sichuan University, Chengdu, 610065, China
| | - Wenjie Shao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Department of Ultrasound, West China Hospital, Sichuan University, Chengdu, 610065, China
| | - Sujiao Cao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Department of Ultrasound, West China Hospital, Sichuan University, Chengdu, 610065, China
| | - Xi Xiang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Department of Ultrasound, West China Hospital, Sichuan University, Chengdu, 610065, China
| | - Lang Ma
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Department of Ultrasound, West China Hospital, Sichuan University, Chengdu, 610065, China.,Department of Chemistry and Biochemistry, Freie Universität Berlin, Takustrasse 3, 14195, Berlin, Germany
| | - Li Qiu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Department of Ultrasound, West China Hospital, Sichuan University, Chengdu, 610065, China
| | - Chong Cheng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Department of Ultrasound, West China Hospital, Sichuan University, Chengdu, 610065, China
| | - Changsheng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Department of Ultrasound, West China Hospital, Sichuan University, Chengdu, 610065, China.,College of Biomedical Engineering, National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, 610064, China.,College of Chemical Engineering, Sichuan University, Chengdu, 610065, China
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40
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Wang Y, Yin J, Zhu J. Two‐Dimensional
Cathode Materials for Aqueous Rechargeable
Zinc‐Ion
Batteries
†. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202100791] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Yurou Wang
- School of Materials Science and Engineering, Nankai University Tianjin 300350 China
| | - Jun Yin
- School of Materials Science and Engineering, Nankai University Tianjin 300350 China
| | - Jian Zhu
- School of Materials Science and Engineering, Nankai University Tianjin 300350 China
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41
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Wang K, Zhang L, Nguyen GD, Sang X, Liu C, Yu Y, Ko W, Unocic RR, Puretzky AA, Rouleau CM, Geohegan DB, Fu L, Duscher G, Li AP, Yoon M, Xiao K. Selective Antisite Defect Formation in WS 2 Monolayers via Reactive Growth on Dilute W-Au Alloy Substrates. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2106674. [PMID: 34738669 DOI: 10.1002/adma.202106674] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/20/2021] [Indexed: 06/13/2023]
Abstract
Defects are ubiquitous in 2D materials and can affect the structure and properties of the materials and also introduce new functionalities. Methods to adjust the structure and density of defects during bottom-up synthesis are required to control the growth of 2D materials with tailored optical and electronic properties. Here, the authors present an Au-assisted chemical vapor deposition approach to selectively form SW and S2W antisite defects, whereby one or two sulfur atoms substitute for a tungsten atom in WS2 monolayers. Guided by first-principles calculations, they describe a new method that can maintain tungsten-poor growth conditions relative to sulfur via the low solubility of W atoms in a gold/W alloy, thereby significantly reducing the formation energy of the antisite defects during the growth of WS2 . The atomic structure and composition of the antisite defects are unambiguously identified by Z-contrast scanning transmission electron microscopy and electron energy-loss spectroscopy, and their total concentration is statistically determined, with levels up to ≈5.0%. Scanning tunneling microscopy/spectroscopy measurements and first-principles calculations further verified these antisite defects and revealed the localized defect states in the bandgap of WS2 monolayers. This bottom-up synthesis method to form antisite defects should apply in the synthesis of other 2D materials.
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Affiliation(s)
- Kai Wang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Lizhi Zhang
- Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, 37916, USA
| | - Giang D Nguyen
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Xiahan Sang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China
- Nanostructure Research Centre, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China
| | - Chenze Liu
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Yiling Yu
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Wonhee Ko
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Raymond R Unocic
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Alexander A Puretzky
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Christopher M Rouleau
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - David B Geohegan
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Lei Fu
- College of Chemistry and Molecular Science, Wuhan University, Wuhan, 430072, China
| | - Gerd Duscher
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN, 37916, USA
| | - An-Ping Li
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Mina Yoon
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Kai Xiao
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
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Zou R, Xie R, Wang L, Lin Y, Lu C. Electrochemiluminescence detection of oxygen vacancies in layered double hydroxides. Chem Commun (Camb) 2021; 58:423-426. [PMID: 34897325 DOI: 10.1039/d1cc05990d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel electrochemiluminescence (ECL) platform was established to screen oxygen vacancies in layered double hydroxides (LDHs) by fabricating graphitic carbon nitride/LDH nanocomposites. The oxygen vacancy concentrations determined by the developed ECL platform were in good agreement with those obtained by XPS.
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Affiliation(s)
- Rui Zou
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Ruyu Xie
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Liren Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Yanjun Lin
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Chao Lu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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43
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Liu Y, Liu Y, Zhou H, Yang Z, Qu Y, Tan Y, Chen F. Defect Engineering of Out-of-Plane Charge Transport in van der Waals Heterostructures for Bi-Direction Photoresponse. ACS NANO 2021; 15:16572-16580. [PMID: 34550681 DOI: 10.1021/acsnano.1c06238] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Defects are ubiquitous in two-dimensional (2D) transition-metal dichalcogenides (TMDs), generated by the initial growth- or the postprocessing. However, the defects may play negative roles in the photoelectronic properties of TMDs due to the reduction of in-plane transport of carriers. In this work, we demonstrate that the Se-vacancy defects in MoSe2 side of the van der Waal heterostructure is able to switch direction of out-of-plane charge transport. Photoresponse spectra showed defect density enable modified surface potential of MoSe2-x, leading to the barrier reverse between graphene and MoSe2-x and switches of the photoresponse from the negative to the positive. This unexpected property stemmed from appearance of midgap states by defects at heterostructure, as demonstrated by the density functional theory calculation and scanning tunneling microscope results. MoSe2-0.2/graphene heterostructure has a broadband response ranging from 450 to 1064 nm and exhibits comparable or higher positive responsivity (5.4 × 103 A/W to -15.3 × 103 A/W at 632.8 and 5.7 × 103 A/W to -1.2 × 103 A/W at 1064 nm) to the negative one of the pristine MoSe2/graphene. Based on defect-engineered heterostructures, we construct optoelectronic OR and AND logic devices with a broadband operation. Our work elucidates an alternative avenue to tailor the out-of-plane charge transport in TMD-based heterostructure through defects, and potentially invokes applicable utilization for 2D photodetectors and optoelectronic logic gates.
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Affiliation(s)
- Yanran Liu
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
| | - Yue Liu
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
| | - Hua Zhou
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
| | - Zaixing Yang
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
| | - Yuanyuan Qu
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
| | - Yang Tan
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
| | - Feng Chen
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandong, Jinan 250100, P. R. China
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44
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Zheng Y, Slade TJ, Hu L, Tan XY, Luo Y, Luo ZZ, Xu J, Yan Q, Kanatzidis MG. Defect engineering in thermoelectric materials: what have we learned? Chem Soc Rev 2021; 50:9022-9054. [PMID: 34137396 DOI: 10.1039/d1cs00347j] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Thermoelectric energy conversion is an all solid-state technology that relies on exceptional semiconductor materials that are generally optimized through sophisticated strategies involving the engineering of defects in their structure. In this review, we summarize the recent advances of defect engineering to improve the thermoelectric (TE) performance and mechanical properties of inorganic materials. First, we introduce the various types of defects categorized by dimensionality, i.e. point defects (vacancies, interstitials, and antisites), dislocations, planar defects (twin boundaries, stacking faults and grain boundaries), and volume defects (precipitation and voids). Next, we discuss the advanced methods for characterizing defects in TE materials. Subsequently, we elaborate on the influences of defect engineering on the electrical and thermal transport properties as well as mechanical performance of TE materials. In the end, we discuss the outlook for the future development of defect engineering to further advance the TE field.
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Affiliation(s)
- Yun Zheng
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, Jianghan University, Wuhan 430056, China
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Zhang A, Liang Y, Zhang H, Geng Z, Zeng J. Doping regulation in transition metal compounds for electrocatalysis. Chem Soc Rev 2021; 50:9817-9844. [PMID: 34308950 DOI: 10.1039/d1cs00330e] [Citation(s) in RCA: 94] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
In electrocatalysis, doping regulation has been considered as an effective method to modulate the active sites of catalysts, providing a powerful means for creating a large variety of highly efficient catalysts for various reactions. Of particular interest, there has been growing research concerning the doping of two-dimensional transition-metal compounds (TMCs) to optimize their electrocatalytic performance. Despite the previous achievements, mechanistic insights of doping regulation in TMCs for electrocatalysis are still lacking. Herein, we provide a systematic overview of doping regulation in TMCs in terms of background, preparation, impacts on physicochemical properties, and typical applications including the hydrogen evolution reaction, oxygen evolution reaction, oxygen reduction reaction, CO2 reduction reaction, and N2 reduction reaction. Notably, we bridge the understanding between the doping regulation of catalysts and their catalytic activities via focusing on the physicochemical properties of catalysts from the aspects of vacancy concentrations, phase transformation, surface wettability, electrical conductivity, electronic band structure, local charge distribution, tunable adsorption strength, and multiple adsorption configurations. We also discuss the existing challenges and future perspectives in this promising field.
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Affiliation(s)
- An Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
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46
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Attia MS, El-Naggar HA, Abdel-Daim MM, El-Sayyad GS. The potential impact of Octopus cyanea extracts to improve eggplant resistance against Fusarium-wilt disease: in vivo and in vitro studies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:35854-35869. [PMID: 33677671 DOI: 10.1007/s11356-021-13222-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 02/25/2021] [Indexed: 05/17/2023]
Abstract
The novelty of the present research is conducting a new method in the systemic resistance of plant diseases by using distinct marine extracts. The ability of two octopus extracts to reduce the wilt disease caused by Fusarium oxysporum was observed. The applied methods are soaked roots (SR) and foliar shoots (FS). The antioxidant enzyme activities, percent disease index (PDI), and growth parameters were measured. In vitro antifungal potential of the octopus extracts against F. oxysporum was examined. The obtained result shows that SR extracts reduced PDI. Additionally, all the tested treatments promoted the growth and photosynthetic pigments of the infected plants. SR (in ethanolic extracts) was the most prominent inducer which offered a high advancement in the total soluble protein contents. Also, SR (in methanolic extracts) was the most suitable inducer which provided a very necessary development not only in the total phenol but also in the peroxidase (POD) and polyphenol oxidase (PPO) activities. GC-MS investigation of the octopus extracts exhibited that the compounds which possess antifungal activity were furoscrobiculin B and/or eugenol. They demonstrated a notable antifungal potential against F. oxysporum with a maximum activity of 38.5 and 12.7 mm ZOI after the treatment with the ethanolic and methanolic extract, respectively. FTIR results illustrated the functional group of the compound responsible for the antifungal activity. Additionally, an atomic absorption result reveals that there are traces of metals detected such as Pb, Ag, Cu, Zn, and Mg. The antifungal activity was decreased as the concentrations were reduced. Accordingly, the present extracts may be used as the vital agents in the agricultural field to restrain the plant pathogenic fungi, especially F. oxysporum from a proliferation.
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Affiliation(s)
- Mohamed S Attia
- Botany and Microbiology Department, Faculty of Science (Boys), Al-Azhar University, 11884 Nasr City, Cairo, Egypt
| | - Hussein A El-Naggar
- Zoology Department, Faculty of Science (Boys), Al-Azhar University, 11884 Nasr City, Cairo, Egypt
| | - Mohamed M Abdel-Daim
- Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, 41522, Egypt
| | - Gharieb S El-Sayyad
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt.
- Chemical Engineering Department, Military Technical College (MTC), Egyptian Armed Forces, Cairo, Egypt.
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Markeev PA, Najafidehaghani E, Gan Z, Sotthewes K, George A, Turchanin A, de Jong MP. Energy-Level Alignment at Interfaces between Transition-Metal Dichalcogenide Monolayers and Metal Electrodes Studied with Kelvin Probe Force Microscopy. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:13551-13559. [PMID: 34239657 PMCID: PMC8237262 DOI: 10.1021/acs.jpcc.1c01612] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 05/27/2021] [Indexed: 06/13/2023]
Abstract
We studied the energy-level alignment at interfaces between various transition-metal dichalcogenide (TMD) monolayers, MoS2, MoSe2, WS2, and WSe2, and metal electrodes with different work functions (WFs). TMDs were deposited on SiO2/silicon wafers by chemical vapor deposition and transferred to Al and Au substrates, with significantly different WFs to identify the metal-semiconductor junction behavior: oxide-terminated Al (natural oxidation) and Au (UV-ozone oxidation) with a WF difference of 0.8 eV. Kelvin probe force microscopy was employed for this study, based on which electronic band diagrams for each case were determined. We observed the Fermi-level pinning for MoS2, while WSe2/metal junctions behaved according to the Schottky-Mott limit. WS2 and MoSe2 exhibited intermediate behavior.
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Affiliation(s)
- Pavel A. Markeev
- MESA+
Institute for Nanotechnology, University
of Twente, 7500 AE Enschede, The Netherlands
| | - Emad Najafidehaghani
- Institute
of Physical Chemistry, Abbe Center of Photonics, Friedrich Schiller University, 07743 Jena, Germany
| | - Ziyang Gan
- Institute
of Physical Chemistry, Abbe Center of Photonics, Friedrich Schiller University, 07743 Jena, Germany
| | - Kai Sotthewes
- MESA+
Institute for Nanotechnology, University
of Twente, 7500 AE Enschede, The Netherlands
| | - Antony George
- Institute
of Physical Chemistry, Abbe Center of Photonics, Friedrich Schiller University, 07743 Jena, Germany
| | - Andrey Turchanin
- Institute
of Physical Chemistry, Abbe Center of Photonics, Friedrich Schiller University, 07743 Jena, Germany
| | - Michel P. de Jong
- MESA+
Institute for Nanotechnology, University
of Twente, 7500 AE Enschede, The Netherlands
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Yang K, Liu T, Zhang XD. Bandgap Engineering and Near-Infrared-II Optical Properties of Monolayer MoS 2: A First-Principle Study. Front Chem 2021; 9:700250. [PMID: 34222202 PMCID: PMC8253311 DOI: 10.3389/fchem.2021.700250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 05/27/2021] [Indexed: 11/13/2022] Open
Abstract
The fluorescence-based optical imaging in the second near-infrared region (NIR-II, 1,000-1,700 nm) has broad applications in the biomedical field, but it is still difficult to find new NIR-II fluorescence materials in the two dimension. As a crucial characteristic of the electronic structure, the band structure determines the fundamental properties of two-dimensional materials, such as their optical excitations and electronic transportation. Therefore, we calculated the electronic structures and optical properties of different crystalline phases (1T phase and 2H phase) of pure monolayer MoS2 films and found that the 1T phase has better absorption and thus better fluorescence in the NIR-II window. However, its poor stability makes the 1T-phase MoS2 less useful in vivo bioimaging. By introducing vacancy defects and doping with foreign atoms, we successfully tuned the bandgap of the monolayer 2H-MoS2 and activated it in the NIR-II. Our results show that by engineering the vacancy defects, the bandgap of the 2H phase can be tailored to around 1 eV, and there are three candidates of vacancy structures that exhibit strong absorption in the NIR-II.
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Affiliation(s)
- Ke Yang
- Department of Physics and Center for Joint Quantum Studies, School of Science, Tianjin University, Tianjin, China
| | - Tianyu Liu
- Department of Physics and Center for Joint Quantum Studies, School of Science, Tianjin University, Tianjin, China
| | - Xiao-Dong Zhang
- Tianjin Key Laboratory of Brain Science and Neural Engineering, Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China
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Qi J, Wang S, Wang J, Umezawa N, Blatov VA, Hosono H. B 5N 3 and B 7N 5 Monolayers with High Carrier Mobility and Excellent Optical Performance. J Phys Chem Lett 2021; 12:4823-4832. [PMID: 33999633 DOI: 10.1021/acs.jpclett.1c00913] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
An ab initio evolutionary search algorithm was combined with density functional theory (DFT) calculations to predict a series of 2-D BxNy (1 < x/y ≤ 2). Particularly, B5N3 and B7N5 monolayers have sufficiently low formation enthalpy and excellent dynamic stability that make them promising for synthesis in experiments. Electronic structure calculations reveal that B5N3 and B7N5 monolayers possess an indirect band gap of 1.99 eV and a direct band gap of 2.40 eV, respectively. The calculated absorption coefficients for B5N3 and B7N5 monolayers are significantly improved in the low end of the visible region compared with that of 2-D h-BN. Moreover, our calculations reveal that both B5N3 and B7N5 monolayers have high electron carrier mobilities. The narrow band gaps, high carrier mobilities, strong near-ultraviolet absorption, and high synthesis possibility of B5N3 and B7N5 monolayers render them promising new materials for application in novel electronics and environmentally benign solar energy conversion.
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Affiliation(s)
- Jingcheng Qi
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Shiyao Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Junjie Wang
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
| | - Naoto Umezawa
- Data & Information Technology Center, Samsung Electronics, 1, Samsungjeonja-ro, Hwaseong-si, Gyeonggi-do 18448, South Korea
| | - Vladislav A Blatov
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, People's Republic of China
- Samara Center for Theoretical Materials Science (SCTMS), Samara State Technical University, Molodogvardeyskaya St. 244, Samara 443100, Russia
| | - Hideo Hosono
- Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
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Yao X, Chen ZW, Liu GJ, Lang XY, Zhu YF, Gao W, Jiang Q. Steric Hindrance- and Work Function-Promoted High Performance for Electrochemical CO Methanation on Antisite Defects of MoS 2 and WS 2. CHEMSUSCHEM 2021; 14:2255-2261. [PMID: 33851508 DOI: 10.1002/cssc.202100457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 04/06/2021] [Indexed: 06/12/2023]
Abstract
CO methanation from electrochemical CO reduction reaction (CORR) is significant for sustainable environment and energy, but electrocatalysts with excellent selectivity and activity are still lacking. Selectivity is sensitive to the structure of active sites, and activity can be tailored by work function. Moreover, intrinsic active sites usually possess relatively high concentration compared to artificial ones. Here, antisite defects MoS2 and WS2 , intrinsic atomic defects of MoS2 and WS2 with a transition metal atom substituting a S2 column, were investigated for CORR by density functional theory calculations. The steric hindrance from the special bowl structure of MoS2 and WS2 ensured good selectivity towards CO methanation. Coordination environment variation of the active sites, the under-coordinated Mo or W atoms, effectively lowered the work function, making MoS2 and WS2 highly active for CO methanation with the required potential of -0.47 and -0.49 V vs. reversible hydrogen electrode, respectively. Moreover, high concentration of active sites and minimal structural deformation during the catalytic process of MoS2 and WS2 enhanced their attraction for future commercial application.
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Affiliation(s)
- Xue Yao
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, P. R. China
- School of Materials Science and Engineering, Jilin University, Changchun, 130022, P. R. China
| | - Zhi-Wen Chen
- Department of Materials Science and Engineering, University of Toronto, Toronto, ON M5S 3E4, Canada
| | - Guo-Jun Liu
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, P. R. China
- School of Materials Science and Engineering, Jilin University, Changchun, 130022, P. R. China
| | - Xing-You Lang
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, P. R. China
- School of Materials Science and Engineering, Jilin University, Changchun, 130022, P. R. China
| | - Yong-Fu Zhu
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, P. R. China
- School of Materials Science and Engineering, Jilin University, Changchun, 130022, P. R. China
| | - Wang Gao
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, P. R. China
- School of Materials Science and Engineering, Jilin University, Changchun, 130022, P. R. China
| | - Qing Jiang
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, P. R. China
- School of Materials Science and Engineering, Jilin University, Changchun, 130022, P. R. China
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