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Lyu P, Wang Z, Guo N, Su J, Li J, Qi D, Xi S, Lin H, Zhang Q, Pennycook SJ, Chen J, Zhao X, Zhang C, Loh KP, Lu J. Air-Stable Wafer-Scale Ferromagnetic Metallo-Carbon Nitride Monolayer. J Am Chem Soc 2024. [PMID: 39021150 DOI: 10.1021/jacs.4c02160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
The pursuit of robust, long-range magnetic ordering in two-dimensional (2D) materials holds immense promise for driving technological advances. However, achieving this goal remains a grand challenge due to enhanced quantum and thermal fluctuations as well as chemical instability in the 2D limit. While magnetic ordering has been realized in atomically thin flakes of transition metal chalcogenides and metal halides, these materials often suffer from air instability. In contrast, 2D carbon-based materials are stable enough, yet the challenge lies in creating a high density of local magnetic moments and controlling their long-range magnetic ordering. Here, we report a novel wafer-scale synthesis of an air-stable metallo-carbon nitride monolayer (MCN, denoted as MN4/CNx), featuring ultradense single magnetic atoms and exhibiting robust room-temperature ferromagnetism. Under low-pressure chemical vapor deposition conditions, thermal dehydrogenation and polymerization of metal phthalocyanine (MPc) on copper foil at elevated temperature generate a substantial number of nitrogen coordination sites for anchoring magnetic single atoms in monolayer MN4/CNx (where M = Fe, Co, and Ni). The incorporation of densely populating MN4 sites into monolayer MCN networks leads to robust ferromagnetism up to room temperature, enabling the observation of anomalous Hall effects with excellent chemical stability. Detailed electronic structure calculations indicate that the presence of high-density metal sites results in the emergence of spin-split d-bands near the Fermi level, causing a favorable long-range ferromagnetic exchange coupling through direct exchange interactions. Our work demonstrates a novel synthesis approach for wafer-scale MCN monolayers with robust room-temperature ferromagnetism and may shed light on practical electronic and spintronic applications.
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Affiliation(s)
- Pin Lyu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- State Key Laboratory of Mechanics and Control of Mechanical Structures and Institute for Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Ziying Wang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Na Guo
- Chongqing Research Institute, National University of Singapore, Chongqing 401123, China
- Department of Physics, Department of Physics and Centre for Advanced 2D Materials, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
| | - Jie Su
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Jing Li
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China
| | - Dongchen Qi
- Centre for Materials Science, School of Chemistry and Physics, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Shibo Xi
- Institute of Chemical and Engineering Sciences, Singapore, 627833, Singapore
| | - Huihui Lin
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Qihan Zhang
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, Singapore
| | - Stephen J Pennycook
- Institute for Functional Intelligent Materials, National University of Singapore, Singapore, 117544, Singapore
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, Singapore
| | - Jingsheng Chen
- Department of Materials Science & Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, Singapore
| | - Xiaoxu Zhao
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Chun Zhang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- Chongqing Research Institute, National University of Singapore, Chongqing 401123, China
- Department of Physics, Department of Physics and Centre for Advanced 2D Materials, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
| | - Kian Ping Loh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Jiong Lu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- Institute for Functional Intelligent Materials, National University of Singapore, Singapore, 117544, Singapore
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2
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Villarreal R, Zarkua Z, Kretschmer S, Hendriks V, Hillen J, Tsai HC, Junge F, Nissen M, Saha T, Achilli S, Hofsäss HC, Martins M, De Ninno G, Lacovig P, Lizzit S, Di Santo G, Petaccia L, De Feyter S, De Gendt S, Brems S, Van de Vondel J, Krasheninnikov AV, Pereira LMC. Achieving High Substitutional Incorporation in Mn-Doped Graphene. ACS NANO 2024; 18:17815-17825. [PMID: 38938181 DOI: 10.1021/acsnano.4c03475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2024]
Abstract
Despite its broad potential applications, substitution of carbon by transition metal atoms in graphene has so far been explored only to a limited extent. We report the realization of substitutional Mn doping of graphene to a record high atomic concentration of 0.5%, which was achieved using ultralow-energy ion implantation. By correlating the experimental data with the results of ab initio Born-Oppenheimer molecular dynamics calculations, we infer that direct substitution is the dominant mechanism of impurity incorporation. Thermal annealing in ultrahigh vacuum provides efficient removal of surface contaminants and additional implantation-induced disorder, resulting in Mn-doped graphene that, aside from the substitutional Mn impurities, is essentially as clean and defect-free as the as-grown layer. We further show that the Dirac character of graphene is preserved upon substitutional Mn doping, even in this high concentration regime, making this system ideal for studying the interaction between Dirac conduction electrons and localized magnetic moments. More generally, these results show that ultralow energy ion implantation can be used for controlled functionalization of graphene with substitutional transition-metal atoms, of relevance for a wide range of applications, from magnetism and spintronics to single-atom catalysis.
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Affiliation(s)
| | - Zviadi Zarkua
- Quantum Solid State Physics, KU Leuven, Leuven 3001, Belgium
| | - Silvan Kretschmer
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - Vince Hendriks
- Quantum Solid State Physics, KU Leuven, Leuven 3001, Belgium
| | - Jonas Hillen
- Quantum Solid State Physics, KU Leuven, Leuven 3001, Belgium
| | - Hung Chieh Tsai
- Imec Vzw (Interuniversitair Micro-Electronica Centrum), Leuven 3001, Belgium
- Department of Chemistry, Division of Molecular Design and Synthesis, KU Leuven, Leuven 3001, Belgium
| | - Felix Junge
- II. Institute of Physics, University of Göttingen, Göttingen 37077, Germany
| | - Matz Nissen
- Institut fur̈ Experimentalphysik, Universität Hamburg, Hamburg 22761, Germany
| | - Tanusree Saha
- Laboratory of Quantum Optics, University of Nova Gorica, Vipavska 11c, Ajdovščina SI-5270, Slovenia
| | - Simona Achilli
- ETSF and Dipartimento di Fisica "Aldo Pontremoli", Università Degli Studi di Milano, Via Celoria, 16, Milano I-20133, Italy
| | - Hans C Hofsäss
- II. Institute of Physics, University of Göttingen, Göttingen 37077, Germany
| | - Michael Martins
- Institut fur̈ Experimentalphysik, Universität Hamburg, Hamburg 22761, Germany
| | - Giovanni De Ninno
- Laboratory of Quantum Optics, University of Nova Gorica, Vipavska 11c, Ajdovščina SI-5270, Slovenia
| | - Paolo Lacovig
- Elettra Sincrotrone Trieste, Strada Statale 14 km 163.5, Trieste 34149, Italy
| | - Silvano Lizzit
- Elettra Sincrotrone Trieste, Strada Statale 14 km 163.5, Trieste 34149, Italy
| | - Giovanni Di Santo
- Elettra Sincrotrone Trieste, Strada Statale 14 km 163.5, Trieste 34149, Italy
| | - Luca Petaccia
- Elettra Sincrotrone Trieste, Strada Statale 14 km 163.5, Trieste 34149, Italy
| | - Steven De Feyter
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Leuven 3001, Belgium
| | - Stefan De Gendt
- Imec Vzw (Interuniversitair Micro-Electronica Centrum), Leuven 3001, Belgium
- Department of Chemistry, Division of Molecular Design and Synthesis, KU Leuven, Leuven 3001, Belgium
| | - Steven Brems
- Imec Vzw (Interuniversitair Micro-Electronica Centrum), Leuven 3001, Belgium
| | | | - Arkady V Krasheninnikov
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
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3
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Li J, Wang G, Sui W, Parvez AM, Xu T, Si C, Hu J. Carbon-based single-atom catalysts derived from biomass: Fabrication and application. Adv Colloid Interface Sci 2024; 329:103176. [PMID: 38761603 DOI: 10.1016/j.cis.2024.103176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 04/03/2024] [Accepted: 04/30/2024] [Indexed: 05/20/2024]
Abstract
Single-atom catalysts (SACs) with active metals dispersed atomically have shown great potential in heterogeneous catalysis due to the high atomic utilization and superior selectivity/stability. Synthesis of SACs using carbon-neutral biomass and its components as the feedstocks provides a promising strategy to realize the sustainable and cost-effective SACs preparation as well as the valorization of underused biomass resources. Herein, we begin by describing the general background and status quo of carbon-based SACs derived from biomass. A detailed enumeration of the common biomass feedstocks (e.g., lignin, cellulose, chitosan, etc.) for the SACs preparation is then offered. The interactions between metal atoms and biomass-derived carbon carriers are summarized to give general rules on how to stabilize the atomic metal centers and rationalize porous carbon structures. Furthermore, the widespread adoption of catalysts in diverse domains (e.g., chemocatalysis, electrocatalysis and photocatalysis, etc.) is comprehensively introduced. The structure-property relationships and the underlying catalytic mechanisms are also addressed, including the influences of metal sites on the activity and stability, and the impact of the unique structure of single-atom centers modulated by metal/biomass feedstocks interactions on catalytic activity and selectivity. Finally, we end this review with a look into the remaining challenges and future perspectives of biomass-based SACs. We expect to shed some light on the forthcoming research of carbon-based SACs derived from biomass, manifestly stimulating the development in this emerging research area.
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Affiliation(s)
- Junkai Li
- State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Guanhua Wang
- State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Wenjie Sui
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Ashak Mahmud Parvez
- Helmholtz-Zentrum Dresden-Rossendorf e.V. (HZDR), Helmholtz Institute Freiberg for Resource Technology (HIF), Chemnitzer Str. 40 | 09599 Freiberg, Germany
| | - Ting Xu
- State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Chuanling Si
- State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Jinguang Hu
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta T2N 1N4, Canada.
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4
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S Araújo W, Caldeira Rêgo CR, Guedes-Sobrinho D, Cavalheiro Dias A, Rodrigues do Couto I, Bordin JR, Ferreira de Matos C, Piotrowski MJ. Quantum Simulations and Experimental Insights into Glyphosate Adsorption Using Graphene-Based Nanomaterials. ACS APPLIED MATERIALS & INTERFACES 2024; 16:31500-31512. [PMID: 38842224 DOI: 10.1021/acsami.4c05733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
The increasing global demand for food and agrarian development brings to light a dual issue concerning the use of substances that are crucial for increasing productivity yet can be harmful to human health and the environment when misused. Herein, we combine insights from high-level quantum simulations and experimental findings to elucidate the fundamental physicochemical mechanisms behind developing graphene-based nanomaterials for the adsorption of emerging contaminants, with a specific focus on pesticide glyphosate (GLY). We conducted a comprehensive theoretical and experimental investigation of graphene-based supports as promising candidates for detecting, sensing, capturing, and removing GLY applications. By combining ab initio molecular dynamics and density functional theory calculations, we explored several chemical environments encountered by GLY during its interaction with graphene-based substrates, including pristine and punctual defect regions. Our results unveiled distinct interaction behaviors: physisorption in pristine and doped graphene regions, chemisorption leading to molecular dissociation in vacancy-type defect regions, and complex transformations involving the capture of N and O atoms from impurity-adsorbed graphene, resulting in the formation of new GLY-derived compounds. The theoretical findings were substantiated by FTIR and Raman spectroscopy, which proposed a mechanism explaining GLY adsorption in graphene-based nanomaterials. The comprehensive evaluation of adsorption energies and associated properties provides valuable insights into the intricate nature of these interactions, shedding light on potential applications and guiding future experimental investigations of graphene-based nanofilters for water decontamination.
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Affiliation(s)
- Wanderson S Araújo
- Department of Physics, Federal University of Pelotas, PO Box 354, Pelotas, Rio Grande do Sul 96010-900, Brazil
| | - Celso Ricardo Caldeira Rêgo
- Institute of Nanotechnology Hermann-von-Helmholtz-Platz, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - Diego Guedes-Sobrinho
- Chemistry Department, Federal University of Paraná, Curitiba, Paraná 81531-980, Brazil
| | - Alexandre Cavalheiro Dias
- Institute of Physics and International Center of Physics, University of Brasília, Brasília, Federal District 70919-970, Brazil
| | - Isadora Rodrigues do Couto
- Department of Chemistry, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul 97105-900, Brazil
| | - José Rafael Bordin
- Department of Physics, Federal University of Pelotas, PO Box 354, Pelotas, Rio Grande do Sul 96010-900, Brazil
| | - Carolina Ferreira de Matos
- Department of Chemistry, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul 97105-900, Brazil
| | - Maurício Jeomar Piotrowski
- Department of Physics, Federal University of Pelotas, PO Box 354, Pelotas, Rio Grande do Sul 96010-900, Brazil
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5
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Luis-Sunga M, González-Orive A, Calderón JC, Gamba I, Ródenas A, de Los Arcos T, Hernández-Creus A, Grundmeier G, Pastor E, García G. Nickel-Induced Reduced Graphene Oxide Nanoribbon Formation on Highly Ordered Pyrolytic Graphite for Electronic and Magnetic Applications. ACS APPLIED NANO MATERIALS 2024; 7:11088-11096. [PMID: 38808309 PMCID: PMC11131383 DOI: 10.1021/acsanm.3c05949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 04/26/2024] [Accepted: 04/26/2024] [Indexed: 05/30/2024]
Abstract
The development of nanoribbon-like structures is an effective strategy to harness the potential benefits of graphenic materials due to their excellent electrical properties, advantageous edge sites, rapid electron transport, and large specific area. Herein, parallel and connected magnetic nanostructured nanoribbons are obtained through the synthesis of reduced graphene oxide (rGO) using NiCl2 as a precursor with potential applications in nascent electronic and magnetic devices. Several analytical techniques have been used for the thorough characterization of the modified surfaces. Atomic force microscopy (AFM) shows the characteristic topographical features of the nanoribbons. While X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Raman spectroscopy provided information on the chemical state of Ni and graphene-like structures, magnetic force microscopy (MFM) and scanning Kelvin probe microscopy (SKPFM) confirmed the preferential concentration of Ni onto rGO nanoribbons. These results indicate that the synthesized material shows 1D ordering of nickel nanoparticles (NiNPs)-decorating tiny rGO flakes into thin threads and the subsequent 2D arrangement of the latter into parallel ribbons following the topography of the HOPG basal plane.
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Affiliation(s)
- Maximina Luis-Sunga
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
| | - Alejandro González-Orive
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
- Department
of Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, Paderborn 33098, Germany
| | - Juan Carlos Calderón
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
- Department
of Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, Paderborn 33098, Germany
| | - Ilaria Gamba
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
| | - Airán Ródenas
- Departamento
de Física, Facultad de ciencias, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez, S/N, La Laguna, Santa Cruz de Tenerife 38200, Spain
- Instituto
Universitario de Estudios Avanzados (IUdEA), Departamento de Física, Universidad de La Laguna, PO Box 456, La Laguna, Santa Cruz de Tenerife 38200, España
| | - Teresa de Los Arcos
- Department
of Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, Paderborn 33098, Germany
| | - Alberto Hernández-Creus
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
| | - Guido Grundmeier
- Department
of Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, Paderborn 33098, Germany
| | - Elena Pastor
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
| | - Gonzalo García
- Instituto
Universitario de Materiales y Nanotecnología, Departamento
de Química, Universidad de La Laguna
(ULL), PO Box 456, La Laguna, Santa
Cruz de Tenerife 38200, España
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6
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Meng Y, Ying L, Tao Y, Ma L, Li B, Xing Y, Liu X, Ma Y, Wen X. DFT Study on Effect of Metal Type and Coordination Environment on CO 2 ECR to C 1 Products over M-N-C Catalysts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:10663-10675. [PMID: 38718299 DOI: 10.1021/acs.langmuir.4c00590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Electrocatalytic reduction (ECR) of CO2 to chemical products is an important carbon emission reduction method. This work uses DFT to study the stability of N-doped graphene-supported four metal single-atom catalysts (M-N-C) and the effects of the coordination environment and metal centers on the selectivity of CO2 ECR to C1 products. The results show that Fe, Co, Ni, and Cu have good stability. The coordination environment has a significant modulating effect on product selectivity, and the change of the number of ligand nitrogen atoms will affect the size of the potential-limiting step of each product. When the number of nitrogen ligands is the same, the different metal centers of the M-N-C catalyst have a significant effect on the selectivity of different products. In addition, the introduction of nitrogen atom ligands can adjust the electronic structure of the graphene-supported metal center, increase the d-band center of most metals, and improve the reaction activity.
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Affiliation(s)
- Yu Meng
- Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, P. R. China
| | - Linbin Ying
- Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, P. R. China
| | - Yani Tao
- Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, P. R. China
| | - Liang Ma
- Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, P. R. China
| | - Baoning Li
- Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, P. R. China
| | - Yan Xing
- Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, P. R. China
| | - Xiaoyan Liu
- Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, P. R. China
| | - Yajun Ma
- Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, P. R. China
| | - Xiaodong Wen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China
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7
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Nguyen NT, Ho DQ, Trung NT. Theoretical insights into the adsorption and gas sensing performance of Fe/Cu-adsorbed graphene. Phys Chem Chem Phys 2024; 26:14265-14276. [PMID: 38690852 DOI: 10.1039/d4cp00561a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
The binding mechanism of gas molecules on material surfaces is essential for understanding adsorption and sensing performance. In the present study, we examine the interaction of some volatile organic compounds (VOCs), including HCHO, C2H5OH, and CH3COCH3, on pristine graphene and its Fe/Cu-adsorbed surfaces using first-principles calculations. The results indicate that the adsorption of these molecules on graphene is regarded as physisorption, while chemisorption is observed for Fe/Cu attached surfaces. The binding of sites on molecules and surfaces primarily involves hydrogen bonds for the pure form of graphene. In contrast, stable interactions occur at functional groups such as >CO, -OH with Fe/Cu atoms, as well as CC bonds of π-rings on modified structures of graphene. It is noticeable that stronger adsorption is observed in the case of Fe addition (Gr-Fe) compared to Cu (Gr-Cu), enhancing the gas adsorption and sensing performance on graphene. Remarkably, the graphene surfaces supported by Fe and Cu improved selectivity in detecting VOC molecules, particularly C2H5OH and CH3COCH3 for Gr-Fe, and HCHO for Gr-Cu. Quantum chemical analyses reveal that the Fe/Cu⋯O/C contacts are covalent interactions, contributing significantly to the stability of configurations and sensing properties of Fe/Cu-adsorbed graphene. In summary, the observed improvements in selectivity, enhanced adsorption strength, and the identification of crucial interactions at the surface offer valuable insights into designing highly efficient gas sensors and developing advanced sensing materials.
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Affiliation(s)
- Ngoc Tri Nguyen
- Lab of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55113, Binh Dinh, Vietnam.
| | - Dai Q Ho
- Lab of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55113, Binh Dinh, Vietnam.
- Department of Materials Science and Engineering, University of Delaware, Newark 19716, Delaware, USA
| | - Nguyen Tien Trung
- Lab of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55113, Binh Dinh, Vietnam.
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8
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Chen Z, Wang S, Xiong W, Wang F. Enhancing the energetic and magnetic stability of atomic hydrogen chemisorbed on graphene using (non)compensated B-N pairs. Phys Chem Chem Phys 2024; 26:13731-13739. [PMID: 38682161 DOI: 10.1039/d4cp00923a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
In this pioneering study for identifying atomic scale magnetic moment, a single hydrogen atom chemisorbed on pristine graphene exhibits distinct spin polarization. Using first-principles calculations and analyses, we demonstrate that the binding between a H adsorbate and a C substrate is substantially enhanced via compensated B-N pairs embedded into graphene. Surprisingly, the interaction can be further enhanced via non-compensated B-N pair doping. Our established prototype of orbital intercoupling between H 1s and hybridized pz of gapped band edges gives an insight into the enhancing mechanism. For compensated B-N doping, the conduction band minimum (CBM) is pushed upward, which induces stronger interaction between the H 1s and hybridized pz orbitals of the CBM. For non-compensated B-N doping, the orbital interaction occurs between H 1s and hybridized pz orbitals of valence band maximum, thus further lowering the resulting bonding energy due to the enlarged gap. This significantly enhanced interaction between H and C atoms agrees well with the results of charge localization at the gapped band edges. More importantly, the corresponding magnetic moments can be well maintained or even enhanced in both doping; here, one more H atom is needed for non-compensated doping, where its electron occupies the empty CBM. Our findings might provide an effective and practical way to enhance the energetic and magnetic stability of atomic scale magnetic moment on graphene and extensively expand the conception of non-compensated doping.
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Affiliation(s)
- Zhengyan Chen
- College of Software, Henan Finance University, Zhengzhou 450046, China
| | - Sanjun Wang
- College of Artificial Intelligence, Henan Finance University, Zhengzhou 450046, China
| | - Wen Xiong
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Fei Wang
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China.
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9
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Qing F, Guo X, Hou Y, Ning C, Wang Q, Li X. Toward the Production of Super Graphene. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2310678. [PMID: 38708801 DOI: 10.1002/smll.202310678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 04/10/2024] [Indexed: 05/07/2024]
Abstract
The quality requirements of graphene depend on the applications. Some have a high tolerance for graphene quality and even require some defects, while others require graphene as perfect as possible to achieve good performance. So far, synthesis of large-area graphene films by chemical vapor deposition of carbon precursors on metal substrates, especially on Cu, remains the main way to produce high-quality graphene, which has been significantly developed in the past 15 years. However, although many prototypes are demonstrated, their performance is still more or less far from the theoretical property limit of graphene. This review focuses on how to make super graphene, namely graphene with a perfect structure and free of contaminations. More specially, this study focuses on graphene synthesis on Cu substrates. Typical defects in graphene are first discussed together with the formation mechanisms and how they are characterized normally, followed with a brief review of graphene properties and the effects of defects. Then, the synthesis progress of super graphene from the aspects of substrate, grain size, wrinkles, contamination, adlayers, and point defects are reviewed. Graphene transfer is briefly discussed as well. Finally, the challenges to make super graphene are discussed and a strategy is proposed.
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Affiliation(s)
- Fangzhu Qing
- School of Integrated Circuit Science and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, 611731, China
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 611731, China
- Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, 518110, China
| | - Xiaomeng Guo
- School of Integrated Circuit Science and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Yuting Hou
- School of Integrated Circuit Science and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Congcong Ning
- School of Integrated Circuit Science and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Qisong Wang
- School of Integrated Circuit Science and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Xuesong Li
- School of Integrated Circuit Science and Engineering (Exemplary School of Microelectronics), University of Electronic Science and Technology of China, Chengdu, 611731, China
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 611731, China
- Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, 518110, China
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10
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Narayan J, Bezborah K. Recent advances in the functionalization, substitutional doping and applications of graphene/graphene composite nanomaterials. RSC Adv 2024; 14:13413-13444. [PMID: 38660531 PMCID: PMC11041312 DOI: 10.1039/d3ra07072g] [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: 10/17/2023] [Accepted: 04/01/2024] [Indexed: 04/26/2024] Open
Abstract
Recently, graphene and graphene-based nanomaterials have emerged as advanced carbon functional materials with specialized unique electronic, optical, mechanical, and chemical properties. These properties have made graphene an exceptional material for a wide range of promising applications in biological and non-biological fields. The present review illustrates the structural modifications of pristine graphene resulting in a wide variety of derivatives. The significance of substitutional doping with alkali-metals, alkaline earth metals, and III-VII group elements apart from the transition metals of the periodic table is discussed. The paper reviews various chemical and physical preparation routes of graphene, its derivatives and graphene-based nanocomposites at room and elevated temperatures in various solvents. The difficulty in dispersing it in water and organic solvents make it essential to functionalize graphene and its derivatives. Recent trends and advances are discussed at length. Controlled reduction reactions in the presence of various dopants leading to nanocomposites along with suitable surfactants essential to enhance its potential applications in the semiconductor industry and biological fields are discussed in detail.
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Affiliation(s)
- Jyoti Narayan
- Synthetic Nanochemistry Laboratory, Department of Basic Sciences & Social Sciences, (Chemistry Division) School of Technology, North Eastern Hill University Shillong 793022 Meghalaya India
| | - Kangkana Bezborah
- Synthetic Nanochemistry Laboratory, Department of Basic Sciences & Social Sciences, (Chemistry Division) School of Technology, North Eastern Hill University Shillong 793022 Meghalaya India
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11
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Cabrera-Tinoco H, Borja-Castro L, Valencia-Bedregal R, Perez-Carreño A, Lalupu-García A, Veliz-Quiñones I, Bustamante Dominguez AG, Barnes CHW, De Los Santos Valladares L. Pyridinic-N Coordination Effect on the Adsorption and Activation of CO 2 by Single Vacancy Iron-Doped Graphene. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:6703-6717. [PMID: 38498309 PMCID: PMC10993407 DOI: 10.1021/acs.langmuir.3c03327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 02/28/2024] [Accepted: 02/28/2024] [Indexed: 03/20/2024]
Abstract
Graphene doped with different transition metals has been recently proposed to adsorb CO2 and help reduce the greenhouse effect. Iron-doped graphene is one of the most promising candidates for this task, but there is still a lack of full understanding of the adsorption mechanism. In this work, we analyze the electronic structure, geometry, and charge redistribution during adsorption of CO2 molecules by single vacancy iron-doped graphene by DFT calculations using the general gradient approximation of Perdew, Burke, and Ernzernhof functional (PBE) and the van der Waals density functional (vdW). To understand the impact of the pyridinic-N coordination of the iron atom, we gradually replaced the neighboring carbon atoms by nitrogen atoms. The analysis indicates that chemisorption and physisorption occur when the molecule is adsorbed in the side-on and end-on orientation, respectively. Adsorption is stronger when pyridinic-N coordination increases, and the vdW functional describes the chemical interactions and adsorption energy differently in relation to PBE without significant structural changes. The development of the chemical interactions with the change of coordination in the system is further investigated in this work with crystal overlap Hamilton population (COHP) analysis.
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Affiliation(s)
| | - Luis Borja-Castro
- Laboratorio
de Cerámicos y Nanomateriales, Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Ap. Postal 14-0149 Lima, Peru
| | - Renato Valencia-Bedregal
- Laboratorio
de Cerámicos y Nanomateriales, Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Ap. Postal 14-0149 Lima, Peru
| | | | | | | | - Angel Guillermo Bustamante Dominguez
- Laboratorio
de Cerámicos y Nanomateriales, Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Ap. Postal 14-0149 Lima, Peru
| | - Crispin H. W. Barnes
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, J. J Thomson Av, Cambridge CB3 0H3, U.K.
| | - Luis De Los Santos Valladares
- Programa
de Pós-Graduação em Ciências de Materiais,
Centro de Ciências Exatas e da Natureza, Universidade Federal de Pernambuco, 50670-901 Recife, PE, Brazil
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, J. J Thomson Av, Cambridge CB3 0H3, U.K.
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12
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Denis PA. Chemical reactivity of graphene doped with 3d transition metals: nothing compares to a single vacancy. J Mol Model 2024; 30:96. [PMID: 38446327 DOI: 10.1007/s00894-024-05893-5] [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: 12/14/2023] [Accepted: 02/29/2024] [Indexed: 03/07/2024]
Abstract
CONTEXT Finding catalysts that do not rely on the use of expensive metals is one of the requirements to achieve sustainable production. The reactivity of graphene doped with 3d transition metals was studied. All dopants enhanced the reactivity of graphene and performed better than Stone-Wales defects and divacancies, but were inferior to monovacancies. For hydrogenation of doped-monovacancies, Sc, Ti, Cr, Co, and Ni induced more prominent reactivity on the carbon atoms. However, the metals were the most reactive center for V, Mn, and Fe-doped graphene. Cu and Zn turned the four neighboring carbon atoms into the preferred sites for hydrogenation. The addition of oxygen to doped graphene with Ti, V, Cr, Mn, Fe, Co, and Ni on a monovacancy revealed a more uniform pattern since the metal, preferred to react with oxygen. However, Sc induced a larger reactivity on the carbon atoms. The affinity of the 3d metal-doped graphene systems towards oxygen was inferior to that observed for single-vacancies. Therefore, vacancy engineering is the most favorable and least expensive method to enhance the reactivity of graphene. METHODS We applied Truhlar's M06-L method accompanied by the 6-31G* basis sets to perform periodic boundary conditions calculations as implemented in Gaussian 09. The ultrafine grid was employed and the unit cells were sampled employing 100 k-points. Results were visualized employing Gaussview 5.0.1.
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Affiliation(s)
- Pablo A Denis
- Computational Nanotechnology, DETEMA, Facultad de Química, UDELAR, CC 1157, 11800, Montevideo, Uruguay.
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13
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Liu T, Liu B, Gao M, Yan XW, Ma F. Prediction of transition metal carbonitride monolayers MN 4C 6 (M = Cr, Mn, Fe, and Co) made up of a benzene ring and a planar MN 4 moiety. Phys Chem Chem Phys 2024; 26:3110-3116. [PMID: 38189422 DOI: 10.1039/d3cp04243j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
Based on first-principles calculations, we predict a class of graphene-like magnetic materials, transition metal carbonitrides MN4C6 (M = Cr, Mn, Fe, and Co), which are made up of a benzene ring and an MN4 moiety, two common planar units in the compounds. The structural stability is demonstrated by the phonon and molecular dynamics calculations, and the formation mechanism of the planar geometry of MN4C6 is ascribed to the synergistic effect of sp2 hybridization, M-N coordination bond, and π-d conjugation. The MN4C6 materials consist of only one layer of atoms and the transition metal atom is located in the planar crystal field, which is markedly different from most two-dimensional materials. The calculations indicate that MnN4C6, FeN4C6, and CoN4C6 are ferromagnetic while CrN4C6 has an antiferromagnetic ground state. The Curie temperatures are estimated by solving the anisotropic Heisenberg model with the Monte Carlo method.
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Affiliation(s)
- Tong Liu
- College of Physics and Engineering, Qufu Normal University, Qufu, Shandong 273165, China.
| | - Bingxin Liu
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
| | - Miao Gao
- Department of Physics, School of Physical Science and Technology, Ningbo University, Zhejiang 315211, China
| | - Xun-Wang Yan
- College of Physics and Engineering, Qufu Normal University, Qufu, Shandong 273165, China.
| | - Fengjie Ma
- The Center for Advanced Quantum Studies and Department of Physics, Beijing Normal University, Beijing 100875, China.
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14
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Xiong T, Chen Y, Qiu R, Yuan H. Excellent 5f-electron magnet of actinide atom decorated gh-C 3N 4 monolayer. Phys Chem Chem Phys 2023; 25:28020-28033. [PMID: 37823441 DOI: 10.1039/d3cp02954a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
Atomic functionality of two-dimensional (2D) materials, typically with a controllable doping route for offering regular atomic arrangement as well as excellent magnetism, is crucial for both fundamental studies and spintronic applications. Here, the adsorptions of the 5f-electron actinide series (An = Ac-Am) on porous graphene-like carbon-nitride (gh-C3N4) layers are explored to determine their structural stabilities, electronic nature and magnetic properties using the combination of density functional theory (DFT) calculations, ab initio molecular dynamics (AIMD), Monte Carlo (MC) simulations and chemical bonding analyses. Our investigations reveal that each An atom can be individually adsorbed at the vacancy site of gh-C3N4 sheet with high energetic, thermal and dynamical stabilities, which are rooted in the major interactions of ionic An-N bonding as well as the minor interactions of covalent bonding of An-5f6d states with N-2s2p states. The delocalization of a very few 5f electrons is dependent on whether they occupy the suborbitals that are matching and conducive to hybridize with the ligand orbitals forming the 5f-2s2p covalent bonds. We propose that the Ruderman-Kittel-Kasuya-Yosida (RKKY) mechanism plays a determining role for the inter-atomic 5f-5f magnetic exchange via the 6d electrons as the conduction electrons. Large magnetic moment and magnetic anisotropy energy (MAE) from the localized 5f electrons, together with the metallic characteristics owing to the delocalized 6d electrons, render these An-based 2D materials excellent metallic magnets, especially for the U@gh-C3N4 system with the modest magnetic moment of 0.6 μB, large MAE of 53 meV and high Curie temperature (TC) of 538 K.
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Affiliation(s)
- Tao Xiong
- School of Physical Science and Technology, Southwest University, Chongqing, 400715, China.
| | - Yaqing Chen
- School of Physical Science and Technology, Southwest University, Chongqing, 400715, China.
| | - Ruizhi Qiu
- Institute of Materials, China Academy of Engineering Physics, Mianyang, Sichuan, 621907, China.
| | - Hongkuan Yuan
- School of Physical Science and Technology, Southwest University, Chongqing, 400715, China.
- Chongqing Key Laboratory of Micro&Nano Structure Optoelectronics, Southwest University, Chongqing, 400715, China
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15
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Ji S, Li Y, Zhang Y, Lin W. Computational screening of high activity and selectivity of CO 2 reduction via transition metal single-atom catalysts on triazine-based graphite carbon nitride. Phys Chem Chem Phys 2023; 25:24022-24030. [PMID: 37650553 DOI: 10.1039/d3cp03051b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Single-atom catalysts (SACs) are emerging as promising catalysts in the field of the electrocatalytic CO2 reduction reaction (CO2RR). Herein, a series of 3d to 5d transition metal atoms supported on triazine-based graphite carbon nitride (TM@TGCN) as a CO2 reduction catalyst are studied via density functional theory computations. Eventually, four TM@TGCN catalysts (TM = Ni, Rh, Os, and Ir) are selected using a five-step screening method, in which Rh@TGCN and Ni@TGCN show a low limiting potential of -0.48 and -0.58 V, respectively, for reducing CO2 to CH4. The activity mechanism shows that the catalysts with a negative d-band center and optimal positive charge can improve the CO2RR performance. Our study provides theoretical guidance for the rational design of highly active and selective catalysts.
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Affiliation(s)
- Shuang Ji
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China.
| | - Yi Li
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China.
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen University, Xiamen, Fujian 361005, China
| | - Yongfan Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China.
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen University, Xiamen, Fujian 361005, China
| | - Wei Lin
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China.
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen University, Xiamen, Fujian 361005, China
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16
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Yang W, Jia Z, Chen L, Zhou B, Zhang D, Han Y, Gao Z, Li H. Effects of intermetal distance on the electrochemistry-induced surface coverage of M-N-C dual-atom catalysts. Chem Commun (Camb) 2023; 59:10761-10764. [PMID: 37589047 DOI: 10.1039/d3cc03208f] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
The often-overlooked electrocatalytic bridge-site poisoning of the emerging dual-atom catalysts (DACs) has aroused broad concerns very recently. Herein, based on surface Pourbaix analysis, we identified a significant change in the electrochemistry-induced surface coverages of DACs upon changing the intermetal distance. We found a pronounced effect of the intermetal distance on the electrochemical potential window and the type of pre-covered adsorbate, suggesting an interesting avenue to tune the electrocatalytic function of DACs.
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Affiliation(s)
- Weijie Yang
- Department of Power Engineering, School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China.
| | - Zhenhe Jia
- Department of Power Engineering, School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China.
| | - Liugang Chen
- Department of Power Engineering, School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China.
| | - Binghui Zhou
- Department of Power Engineering, School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China.
| | - Di Zhang
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai 980-8577, Japan.
| | - Yulan Han
- School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast BT9 5AG, UK
| | - Zhengyang Gao
- Department of Power Engineering, School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China.
| | - Hao Li
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai 980-8577, Japan.
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17
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Yam KM, Zhang Y, Guo N, Jiang Z, Deng H, Zhang C. Two-dimensional graphitic metal carbides: structure, stability and electronic properties. NANOTECHNOLOGY 2023; 34:465706. [PMID: 37549662 DOI: 10.1088/1361-6528/acedb6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Accepted: 08/07/2023] [Indexed: 08/09/2023]
Abstract
Via first-principles computational modeling and calculations, we propose a new class of two-dimensional (2D) atomically thin crystals that contain metal-C3(MC3) moieties periodically distributed in a graphenic lattice, which we refer to as 2D graphitic metal carbides (g-MCs). Most g-MCs are dynamically stable as verified by the calculated phonon spectra. Our detailed chemical bonding analyzes reveal that the high stability of g-MCs can be attributed to a unique bonding feature, which manifests as the carbon-backbone-mediated metal-metal interactions. These analyzes provide new insights for understanding the stability of 2D materials. It is found that the calculated electronic band gaps and magnetic moments (per unit cell) of g-MCs can range from 0 to 1.30 eV and 0 to 4.40μB, respectively. Highly tunable electronic properties imply great potential of 2D g-MCs in various applications. As an example, we show that 2D g-MnC can be an excellent electrocatalyst towards CO2reductive reaction for the formation of formic acid with an exceptionally high loading of Mn atoms (∼43 wt%). We expect this work to simulate new experiments for fabrication and applications of g-MCs.
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Affiliation(s)
- Kah-Meng Yam
- Department of Physics, National University of Singapore, 2 Science Drive 3 117551, Singapore
- Department of Chemistry, National University of Singapore, 3 Science Drive 3 117543, Singapore
| | - Yongjie Zhang
- Department of Physics, National University of Singapore, 2 Science Drive 3 117551, Singapore
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, People's Republic of China
| | - Na Guo
- NUS (Chongqing) Research Institute, No. 16 South Huashan Road, 401123, Chongqing, People's Republic of China
| | - Zhuoling Jiang
- Department of Physics, National University of Singapore, 2 Science Drive 3 117551, Singapore
| | - Hui Deng
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, People's Republic of China
| | - Chun Zhang
- Department of Physics, National University of Singapore, 2 Science Drive 3 117551, Singapore
- Department of Chemistry, National University of Singapore, 3 Science Drive 3 117543, Singapore
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18
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Li C, Wang F, Cui B, Pan Z, Jia Y. Localized magnetic moment induced by boron adatoms chemisorbed on graphene. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 35. [PMID: 37068487 DOI: 10.1088/1361-648x/accdad] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Accepted: 04/17/2023] [Indexed: 05/16/2023]
Abstract
Inducing local spin-polarization in pristine graphene is highly desirable and recent experiment shows that boron adatom chemical attachment to graphene exhibits local high spin state. Using hybrid exchange-correlation functional, we show that boron (B) monomer chemisorbed on the bridge site of graphene is energically favorable, and indeed induces a weak local spin-polarization ∼0.56μB. The localized magnetic moment can be attributed to the charge transfer from boron atom to graphene, resulting in local spin charge dominantly surrounding to the adsorbed B and neighboring carbon (C) atoms. We also surprisingly find that boron dimer can even much more stable upright anchor the same site of graphene, giving rise to sizable spin magnetic moment 2.00μB. Although the apparent spin state remains mainly contributed by Bpand Cporbitals as the case of boron monomer, the delicate and substantial charge transfer of theintra-dimerplays a fundamental role in producing such sizable local spin-polarization. We employed various van der Waals corrections to check and confirm the validity of appeared local spin-polarization. In terms of the almost identical simulated scanning tunneling microscope between boron monomer and dimer, we might tend to support the fact that boron dimer can also be chemisorbed on graphene with much larger and stable localized spin magnetic moment.
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Affiliation(s)
- Chong Li
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Fei Wang
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Bin Cui
- School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
| | - Zhifeng Pan
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Yu Jia
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, People's Republic of China
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19
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Guo Y, Liu C, Liao J, Liu Y, Qian H, Xu J, Wang H, Nie K, Wang J. Growth mechanism study and band structure modulation of a manganese doped two-dimensional BlueP-Au network. RSC Adv 2023; 13:12685-12694. [PMID: 37101530 PMCID: PMC10123488 DOI: 10.1039/d3ra00751k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 04/15/2023] [Indexed: 04/28/2023] Open
Abstract
Two-dimensional (2D) materials are a very promising material family. The two-dimensional inorganic metal network called BlueP-Au network is rapidly attracting the attention of researchers due to its customizable architecture, adjustable chemical functions and electronic properties. Herein, manganese (Mn) was successfully doped on a BlueP-Au network for the first time, then the doping mechanism and electronic structure evolution was studied by in situ X-ray photoelectron spectroscopy (XPS) based on synchrotron radiation, X-ray absorption spectroscopy (XAS), Scanning Tunneling Microscopy (STM), Density functional theory (DFT), Low-energy electron diffraction (LEED), Angle resolved photoemission spectroscopy (ARPES), etc. Mn atoms tend to be stably adsorbed on two sites of the BlueP-Au network. It was the first observation that atoms can absorb on the two sites stably simultaneously. It is different from the previous adsorption models of BlueP-Au networks. The band structure was also successfully modulated, and overall down about 0.25 eV relative to the Fermi edge. It provided a new strategy for customizing the functional structure of the BlueP-Au network, which has provided new insights into monatomic catalysis, energy storage and nano electronic devices.
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Affiliation(s)
- Yuxuan Guo
- Institute of High Energy Physics, Chinese Academy of Sciences Beijing 100049 China +86-010-88235992
- University of Chinese Academy of Sciences, Chinese Academy of Sciences Beijing 100049 China
| | - Chen Liu
- Institute of High Energy Physics, Chinese Academy of Sciences Beijing 100049 China +86-010-88235992
| | - Jiangwen Liao
- Institute of High Energy Physics, Chinese Academy of Sciences Beijing 100049 China +86-010-88235992
- University of Chinese Academy of Sciences, Chinese Academy of Sciences Beijing 100049 China
| | - Yunpeng Liu
- Institute of High Energy Physics, Chinese Academy of Sciences Beijing 100049 China +86-010-88235992
| | - Haijie Qian
- Institute of High Energy Physics, Chinese Academy of Sciences Beijing 100049 China +86-010-88235992
| | - Jinfeng Xu
- Institute of High Energy Physics, Chinese Academy of Sciences Beijing 100049 China +86-010-88235992
- University of Chinese Academy of Sciences, Chinese Academy of Sciences Beijing 100049 China
| | - Hao Wang
- Institute of High Energy Physics, Chinese Academy of Sciences Beijing 100049 China +86-010-88235992
- University of Chinese Academy of Sciences, Chinese Academy of Sciences Beijing 100049 China
| | - Kaiqi Nie
- Institute of High Energy Physics, Chinese Academy of Sciences Beijing 100049 China +86-010-88235992
| | - Jiaou Wang
- Institute of High Energy Physics, Chinese Academy of Sciences Beijing 100049 China +86-010-88235992
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20
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Genç AE, Akça A, Karaman C, Camarada MB, Dragoi EN. Ammonia free catalytic reduction of nitric oxide on Ni-embedded graphene nanostructure: A density functional theory investigation. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.113119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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21
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He Z, Wang K, Yan C, Wan L, Zhou Q, Zhang T, Ye X, Zhang Y, Shi F, Jiang S, Zhao J, Wang K, Chen C. Controlled Preparation and Device Application of Sub-5 nm Graphene Nanoribbons and Graphene Nanoribbon/Carbon Nanotube Intramolecular Heterostructures. ACS APPLIED MATERIALS & INTERFACES 2023; 15:7148-7156. [PMID: 36692227 DOI: 10.1021/acsami.2c21220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Narrow graphene nanoribbons (GNRs) and GNR/single-walled carbon nanotube (SWNT) intramolecular heterojunctions are ideal candidates to construct next-generation electronic and optoelectronic devices. However, the fabrication of high-quality long sub-5 nm wide GNRs and GNR/SWNT heterojunctions is a great challenge. Here, we report a method to produce high-quality sub-5 nm wide GNRs with smooth edges and GNR/SWNT intramolecular heterostructures via palladium-catalyzed full and partial unzipping of SWNTs, respectively. The resulting GNRs could be as narrow as 2.2 nm and had an average length of over 1 μm. By adjusting the unzipping time and the deposited positions of palladium nanoparticles, controlled multiple GNR/SWNT heterostructures were also fabricated on an individual parent SWNT. A GNR field-effect transistor (FET) constructed by a 3.1 nm wide GNR could simultaneously achieve a high on/off current ratio of 1.1 × 104 and a large mobility of 598 cm2 V-1 s-1. The photovoltaic device based on a single GNR (2.4 nm in width)/SWNT (0.8 nm in diameter) heterojunction exhibited a large open-circuit voltage (Voc) of 0.52 V and a high external power conversion efficiency (η) of 4.7% under the 1550 nm wavelength illumination of 931 mW cm-2. Our method provides a pathway to controllably prepare high-quality sub-5 nm GNRs and GNR/SWNT heterojunctions for fundamental studies and practical applications in the electronic and optoelectronic fields.
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Affiliation(s)
- Zhiyan He
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Kai Wang
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Chao Yan
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212001, China
| | - Lijuan Wan
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- School of Electronic Information and Electrical Engineering, Hefei Normal University, Hefei 230601, China
| | - Qingping Zhou
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Teng Zhang
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiaowo Ye
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yanming Zhang
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fangyuan Shi
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shenghao Jiang
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jian Zhao
- State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China
| | - Kunchan Wang
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Changxin Chen
- National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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22
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Liu X, Sheng L. Potential of Single Transition Metal Atom Embedded C
2
N as Efficient Catalysts for N
2
O Reduction: Theoretical Investigation. ADVANCED THEORY AND SIMULATIONS 2023. [DOI: 10.1002/adts.202200680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Xinmiao Liu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 China
| | - Li Sheng
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 China
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23
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Yang W, Jia Z, Zhou B, Wei L, Gao Z, Li H. Surface states of dual-atom catalysts should be considered for analysis of electrocatalytic activity. Commun Chem 2023; 6:6. [PMID: 36698039 PMCID: PMC9822963 DOI: 10.1038/s42004-022-00810-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 12/30/2022] [Indexed: 01/07/2023] Open
Abstract
Experimentally well-characterized dual-atom catalysts (DACs), where two adjacent metal atoms are stably anchored on carbon defects, have shown some clear advantages in electrocatalysis compared to conventional catalysts and emerging single-atom catalysts. However, most previous theoretical studies directly used a pristine dual-atom site to analyze the electrocatalytic activity of a DAC. Herein, by analyzing 8 homonuclear and 64 heteronuclear DACs structures with ab initio calculations, our derived surface Pourbaix diagrams show that the surface states of DACs generally differ from a pristine surface at electrocatalytic operating conditions. This phenomenon suggests that the surface state of a DAC should be considered before analyzing the catalytic activity in electrocatalysis, while the electrochemistry-driven pre-adsorbed molecules generated from the liquid phase may either change the electronic properties or even block the active site of DACs. Based on these results, we provide a critical comment to the catalyst community: before analyzing the electrocatalytic activity of a DAC, its surface state should be analyzed beforehand.
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Affiliation(s)
- Weijie Yang
- Department of Power Engineering, School of Energy, Power and Mechanical Engineering, North China Electric Power University, 071003, Baoding, China
| | - Zhenhe Jia
- Department of Power Engineering, School of Energy, Power and Mechanical Engineering, North China Electric Power University, 071003, Baoding, China
| | - Binghui Zhou
- Department of Power Engineering, School of Energy, Power and Mechanical Engineering, North China Electric Power University, 071003, Baoding, China
| | - Li Wei
- School of Chemical and Biomolecule Engineering, The University of Sydney, Darlington, 2006, NSW, Australia
| | - Zhengyang Gao
- Department of Power Engineering, School of Energy, Power and Mechanical Engineering, North China Electric Power University, 071003, Baoding, China.
| | - Hao Li
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai, 980-8577, Japan.
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24
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Wu F, Wang Z, He J, Li Z, Meng L, Zhang X. Effect of 3 d Transition Metal Atom Intercalation Concentration on the Electronic and Magnetic Properties of Graphene/MoS 2 Heterostructure: A First-Principles Study. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020509. [PMID: 36677569 PMCID: PMC9864100 DOI: 10.3390/molecules28020509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 12/31/2022] [Accepted: 01/01/2023] [Indexed: 01/06/2023]
Abstract
The electronic and magnetic properties of graphene/MoS2 heterostructures intercalated with 3d transition metal (TM) atoms at different concentrations have been systematically investigated by first principles calculations. The results showed that all the studied systems are thermodynamically stable with large binding energies of about 3.72 eV-6.86 eV. Interestingly, all the TM-intercalated graphene/MoS2 heterostructures are ferromagnetic and their total magnetic moments increase with TM concentration. Furthermore, TM concentration-dependent spin polarization is obtained for the graphene layer and MoS2 layer due to the charge transfer between TM atoms and the layers. A significant band gap is opened for graphene in these TM-intercalated graphene/MoS2 heterostructures (around 0.094 eV-0.37 eV). With the TM concentration increasing, the band gap of graphene is reduced due to the enhanced spin polarization of graphene. Our study suggests a research direction for the manipulation of the properties of 2D materials through control of the intercalation concentration of TM atoms.
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Affiliation(s)
- Feng Wu
- Department of Physics, Yancheng Institute of Technology, Yancheng 224051, China
| | - Zijin Wang
- College of Physics Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou 225002, China
| | - Jiaqi He
- College of Physics Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou 225002, China
| | - Zhenzhe Li
- College of Physics Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou 225002, China
| | - Lijuan Meng
- Department of Physics, Yancheng Institute of Technology, Yancheng 224051, China
| | - Xiuyun Zhang
- College of Physics Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou 225002, China
- Correspondence:
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25
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Huang J, Liu Y, Chen J, Lai Z, Hu J, Zhou F, Li M, Zhu J. Adsorption behaviour of Al atoms on the surface of perfect and defective graphene: a first principle study. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2121231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Jingtao Huang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, People's Republic of China
| | - Yong Liu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, People's Republic of China
- National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin, People's Republic of China
| | - Jiaying Chen
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, People's Republic of China
| | - Zhonghong Lai
- Center for Analysis, Measurement and Computing, Harbin Institute of Technology, Harbin, China
| | - Jin Hu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, People's Republic of China
| | - Fei Zhou
- State Key Laboratory for Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, People's Republic of China
| | - Mingwei Li
- National Key Lab for Precision Heat Processing of Metal, Harbin Institute of Technology, Harbin, People's Republic of China
| | - Jingchuan Zhu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, People's Republic of China
- National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin, People's Republic of China
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26
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Ugartemendia A, Garcia Lekue A, Jimenez Izal E. Tailoring magnetism in silicon-doped zigzag graphene edges. Sci Rep 2022; 12:13032. [PMID: 35906454 PMCID: PMC9338279 DOI: 10.1038/s41598-022-16902-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 07/18/2022] [Indexed: 11/18/2022] Open
Abstract
Recently, the edges of single-layer graphene have been experimentally doped with silicon atoms by means of scanning transmission electron microscopy. In this work, density functional theory is applied to model and characterize a wide range of experimentally inspired silicon doped zigzag-type graphene edges. The thermodynamic stability is assessed and the electronic and magnetic properties of the most relevant edge configurations are unveiled. Importantly, we show that silicon doping of graphene edges can induce a reversion of the spin orientation on the adjacent carbon atoms, leading to novel magnetic properties with possible applications in the field of spintronics.
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Affiliation(s)
- Andoni Ugartemendia
- Polimero eta Material Aurreratuak Fisika, Kimika eta Teknologia Saila, Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), M. de Lardizabal Pasealekua 3, Donostia, Euskadi, Spain
- Donostia International Physics Center (DIPC), M. de Lardizabal Pasealekua 3, Donostia, Euskadi, Spain
| | - Aran Garcia Lekue
- Donostia International Physics Center (DIPC), M. de Lardizabal Pasealekua 3, Donostia, Euskadi, Spain.
- IKERBASQUE, Basque Foundation for Science, Bilbao, Euskadi, Spain.
| | - Elisa Jimenez Izal
- Polimero eta Material Aurreratuak Fisika, Kimika eta Teknologia Saila, Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), M. de Lardizabal Pasealekua 3, Donostia, Euskadi, Spain.
- Donostia International Physics Center (DIPC), M. de Lardizabal Pasealekua 3, Donostia, Euskadi, Spain.
- IKERBASQUE, Basque Foundation for Science, Bilbao, Euskadi, Spain.
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27
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Dong X, Zhu W, Liang X. Accelerating electrochemically catalyzed nitrogen reductions using metalloporphyrin-mediated metal-nitrogen-doped carbon (M-N-C) catalysts. Dalton Trans 2022; 51:12240-12249. [PMID: 35894861 DOI: 10.1039/d2dt01258h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, a series of transition metal coordinated metalloporphyrin-mediated M-N-C catalysts with single and dual metal atoms were prepared and characterized. Interestingly, these M-N-C catalysts exhibit accelerated N2 reduction behaviors through electrochemical catalysis. At the potential of E = -0.4V (vs. RHE), the optimum catalyst Fe0.95Ni0.05TPP@rGO-800 shows excellent catalytic activity, and the NH3 yield is 22.5 μg mgcat-1 h-1, which is much higher than that of its single metal counterparts alone, and the faradaic efficiency is as high as 50.7%, which is better than those of most reported catalysts. These results provide an opportunity to further explore the efficient electrochemical synthesis of NH3 from M-N-C materials in the future.
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Affiliation(s)
- Xinyi Dong
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
| | - Weihua Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
| | - Xu Liang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China.
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28
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Bhatt MD, Kim H, Kim G. Various defects in graphene: a review. RSC Adv 2022; 12:21520-21547. [PMID: 35975063 PMCID: PMC9347212 DOI: 10.1039/d2ra01436j] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 07/19/2022] [Indexed: 11/23/2022] Open
Abstract
Pristine graphene has been considered one of the most promising materials because of its excellent physical and chemical properties. However, various defects in graphene produced during synthesis or fabrication hinder its performance for applications such as electronic devices, transparent electrodes, and spintronic devices. Due to its intrinsic bandgap and nonmagnetic nature, it cannot be used in nanoelectronics or spintronics. Intrinsic and extrinsic defects are ultimately introduced to tailor electronic and magnetic properties and take advantage of their hidden potential. This article emphasizes the current advancement of intrinsic and extrinsic defects in graphene for potential applications. We also discuss the limitations and outlook for such defects in graphene.
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Affiliation(s)
| | - Heeju Kim
- Hybrid Materials Center, Sejong University Seoul 05006 Korea
- Department of Physics and Astronomy, Sejong University Seoul 05006 Korea
| | - Gunn Kim
- Hybrid Materials Center, Sejong University Seoul 05006 Korea
- Department of Physics and Astronomy, Sejong University Seoul 05006 Korea
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29
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Yang L, Xiao W, Wang J, Li XW, Wang L. Improving the HCHO Sensing Selectivity on Ag-Doped Graphene by Oxygen Functionalization: A First-Principles Study. ACS OMEGA 2022; 7:17995-18003. [PMID: 35664580 PMCID: PMC9161398 DOI: 10.1021/acsomega.2c01383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 04/29/2022] [Indexed: 06/15/2023]
Abstract
Graphene-based sensors typically fail in the selectivity of target gas detection when exposed to complex and multicompound atmospheres. We have thoroughly compared the adsorptions of various interfering gases (CO, NH3, CH4, C2H2, C2H4, CH3OH, and CH3Cl) with target HCHO on AgG and AgOG by first-principles simulations. The results demonstrate that AgG shows a poor selectivity for HCHO detection and an oxygen functionalized one can improve the selectivity by enhancing the adsorption strength of HCHO and weakening those of other gas molecules. Moreover, the sensing properties of the AgOG sensors are evaluated by the NEGF method, and the predicted HCHO sensing responses are 76 and 32% along the armchair and zigzag directions, respectively. The present work helps shed some light on designing graphene-based sensing materials with high selectivity.
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Affiliation(s)
- Lunwei Yang
- State
Key Laboratory of Nonferrous Metals and Processes, GRIMN Group Co., Ltd., Beijing 101417, P. R. China
- GRIMAT
Engineering Institute Co., Ltd., Beijing 100088, P. R.
China
- General
Research Institute for Nonferrous Metals, Beijing 100088, P. R. China
- Department
of Materials Physics and Chemistry, School of Materials Science and
Engineering, Key Laboratory for Anisotropy and Texture of Materials,
Ministry of Education, Northeastern University, Shenyang 110819, P. R. China
| | - Wei Xiao
- State
Key Laboratory of Nonferrous Metals and Processes, GRIMN Group Co., Ltd., Beijing 101417, P. R. China
- GRIMAT
Engineering Institute Co., Ltd., Beijing 100088, P. R.
China
- General
Research Institute for Nonferrous Metals, Beijing 100088, P. R. China
| | - Jianwei Wang
- State
Key Laboratory of Nonferrous Metals and Processes, GRIMN Group Co., Ltd., Beijing 101417, P. R. China
- GRIMAT
Engineering Institute Co., Ltd., Beijing 100088, P. R.
China
- General
Research Institute for Nonferrous Metals, Beijing 100088, P. R. China
| | - Xiao-Wu Li
- Department
of Materials Physics and Chemistry, School of Materials Science and
Engineering, Key Laboratory for Anisotropy and Texture of Materials,
Ministry of Education, Northeastern University, Shenyang 110819, P. R. China
| | - Ligen Wang
- State
Key Laboratory of Nonferrous Metals and Processes, GRIMN Group Co., Ltd., Beijing 101417, P. R. China
- GRIMAT
Engineering Institute Co., Ltd., Beijing 100088, P. R.
China
- General
Research Institute for Nonferrous Metals, Beijing 100088, P. R. China
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30
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Lu Y, Fan X, Ma X, Liu J, Li Y, Zhao M. Tunable topological electronic states in the honeycomb-kagome lattices of nitrogen/oxygen-doped graphene nanomeshes. NANOSCALE ADVANCES 2022; 4:2201-2207. [PMID: 36133449 PMCID: PMC9419200 DOI: 10.1039/d2na00132b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 04/06/2022] [Indexed: 06/16/2023]
Abstract
The rich and exotic electronic properties of graphene nanomeshes (GNMs) have been attracting interest due to their superiority to pristine graphene. Using first-principles calculations, we considered three graphene meshes doped with nitrogen and oxygen atoms (C10N3, C9N4 and C10O3). The electronic band structures of these GNMs in terms of the proximity of the Fermi level featured a two-dimensional (2D) honeycomb-kagome lattice with concurrent kagome and Dirac bands. The position of the Fermi level can be regulated by the doping ratio, resulting in different topological quantum states, namely topological Dirac semimetals and Dirac nodal line (DNL) semimetals. More interestingly, the adsorption of rhenium (Re) atoms in the voids of the C10N3 (Re@ C10N3) GNMs induced quantum anomalous Hall (QAH) states, as verified by the nonzero Chern numbers and chiral edge states. These GNMs offer a promising platform superior to pristine graphene for regulating multiple topological states.
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Affiliation(s)
- Yiming Lu
- School of Physics, Shandong University Jinan Shandong 250100 China
| | - Xuejia Fan
- School of Physics, Shandong University Jinan Shandong 250100 China
| | - Xikui Ma
- School of Physics, Shandong University Jinan Shandong 250100 China
| | - Jian Liu
- School of Physics, Shandong University Jinan Shandong 250100 China
| | - Yangyang Li
- School of Physics, Shandong University Jinan Shandong 250100 China
| | - Mingwen Zhao
- School of Physics, Shandong University Jinan Shandong 250100 China
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31
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Küçük H. The small gas activities on different number of nitrogen atom doping to Cobalt embedded graphene. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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32
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Influence of Magnetic Moment on Single Atom Catalytic Activation Energy Barriers. Catal Letters 2022. [DOI: 10.1007/s10562-021-03737-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractDesign of the molecular environment of single atom catalysts (SAC) is promising for achieving high catalytic activity without expensive and scarce platinum-group metals (PGM). We utilize a first principles approach to examine how the spin state of the SAC and reactants can affect catalytic energy barriers of V, Fe, Mo, and Ta on two different graphene defects with differing magnetic moments. Spin polarized projected density of states and climbing image nudged elastic band calculations demonstrate relatively lower activation energy barriers for systems with higher spin state asymmetry near the Fermi energy; CO oxidation on Ta and V SAC have decreases in activation barrier energies of 27% and 44%, respectively.
Graphic Abstract
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33
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Lamiri L, Benchallal L, Boubenider F, Zitoune H, Kahouadji B, Samah M. Electronic and Magnetic Properties of Iron Doped Graphene Nanoribbons. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s0036024422140151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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34
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Adsorption and Sensing Properties of Formaldehyde on Chemically Modified Graphene Surfaces. CRYSTALS 2022. [DOI: 10.3390/cryst12040553] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Chemically modifying graphene (such as chemical doping) is a commonly used method to improve its formaldehyde sensing properties, but the microscopic mechanisms of heteroatoms in the adsorption and sensing process are still unclear. In this paper, the adsorption and sensing properties of formaldehyde on graphene surfaces modified by X doping (X = B, N, O, P, S, Mg and Al) were systematically investigated by first-principles calculations. The adsorption geometries, adsorption energies, charge transfers, and electronic structures were obtained and analyzed. The adsorption strengths of HCHO molecule on the Mg- and Al-doped graphene surfaces were stronger than those of non-metal (B, N, O, P and S)-doped cases. These results showed that the Mg- or Al-doped graphene was better for HCHO detecting than the non-metal-doped graphene systems. The sensing properties were simulated by theNEGF method for the two-probe nano-sensors constructed from Al- and Mg-doped graphene. The maximum sensing responses of nano-sensors based on Al- and Mg-doped graphene were obtained to be 107% and 60%, respectively. The present study supplies a theoretical basis for designing superior graphene-based HCHO gas sensors.
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35
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Chang B, Zhang L, Wu S, Sun Z, Cheng Z. Engineering single-atom catalysts toward biomedical applications. Chem Soc Rev 2022; 51:3688-3734. [PMID: 35420077 DOI: 10.1039/d1cs00421b] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Due to inherent structural defects, common nanocatalysts always display limited catalytic activity and selectivity, making it practically difficult for them to replace natural enzymes in a broad scope of biologically important applications. By decreasing the size of the nanocatalysts, their catalytic activity and selectivity will be substantially improved. Guided by this concept, the advances of nanocatalysts now enter an era of atomic-level precise control. Single-atom catalysts (denoted as SACs), characterized by atomically dispersed active sites, strikingly show utmost atomic utilization, precisely located metal centers, unique metal-support interactions and identical coordination environments. Such advantages of SACs drastically boost the specific activity per metal atom, and thus provide great potential for achieving superior catalytic activity and selectivity to functionally mimic or even outperform natural enzymes of interest. Although the size of the catalysts does matter, it is not clear whether the guideline of "the smaller, the better" is still correct for developing catalysts at the single-atom scale. Thus, it is clearly a new, urgent issue to address before further extending SACs into biomedical applications, representing an important branch of nanomedicine. This review begins by providing an overview of recent advances of synthesis strategies of SACs, which serve as a basis for the discussion of emerging achievements in improving the enzyme-like catalytic properties at an atomic level. Then, we carefully compare the structures and functions of catalysts at various scales from nanoparticles, nanoclusters, and few-atom clusters to single atoms. Contrary to conventional wisdom, SACs are not the most catalytically active catalysts in specific reactions, especially those requiring multi-site auxiliary activities. After that, we highlight the unique roles of SACs toward biomedical applications. To appreciate these advances, the challenges and prospects in rapidly growing studies of SACs-related catalytic nanomedicine are also discussed in this review.
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Affiliation(s)
- Baisong Chang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China.
| | - Liqin Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China.
| | - Shaolong Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China.
| | - Ziyan Sun
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, P. R. China.
| | - Zhen Cheng
- State Key Laboratory of Drug Research, Molecular Imaging Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China. .,Bohai rim Advanced Research Institute for Drug Discovery, Yantai, 264000, China.,Molecular Imaging Program at Stanford (MIPS), Department of Radiology and Bio-X Program, Stanford University, California 94305, USA
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36
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Xie T, Wang P, Tian C, Zhao G, Jia J, He C, Zhao C, Wu H. Adsorption Characteristics of Gas Molecules Adsorbed on Graphene Doped with Mn: A First Principle Study. Molecules 2022; 27:molecules27072315. [PMID: 35408715 PMCID: PMC9000528 DOI: 10.3390/molecules27072315] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 03/20/2022] [Accepted: 03/30/2022] [Indexed: 02/04/2023] Open
Abstract
Herein, the adsorption characteristics of graphene substrates modified through a combined single manganese atom with a vacancy or four nitrogen to CH2O, H2S and HCN, are thoroughly investigated via the density functional theory (DFT) method. The adsorption structural, electronic structures, magnetic properties and adsorption energies of the adsorption system have been completely analyzed. It is found that the adsorption activity of a single vacancy graphene-embedded Mn atom (MnSV-GN) is the largest in the three graphene supports. The adsorption energies have a good correlation with the integrated projected crystal overlap Hamilton population (-IpCOHP) and Fermi softness. The rising height of the Mn atom and Fermi softness could well describe the adsorption activity of the Mn-modified graphene catalyst. Moreover, the projected crystal overlap Hamilton population (-pCOHP) curves were studied and they can be used as the descriptors of the magnetic field. These results can provide guidance for the development and design of graphene-based single-atom catalysts, especially for the support effect.
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Affiliation(s)
- Tingyue Xie
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, School of Chemistry and Materials Science, Shanxi Normal University, Taiyuan 030006, China; (T.X.); (G.Z.); (J.J.)
- School of Physical and Electronics Science, Shanxi Datong University, Datong 037009, China; (P.W.); (C.T.)
| | - Ping Wang
- School of Physical and Electronics Science, Shanxi Datong University, Datong 037009, China; (P.W.); (C.T.)
| | - Cuifeng Tian
- School of Physical and Electronics Science, Shanxi Datong University, Datong 037009, China; (P.W.); (C.T.)
| | - Guozheng Zhao
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, School of Chemistry and Materials Science, Shanxi Normal University, Taiyuan 030006, China; (T.X.); (G.Z.); (J.J.)
| | - Jianfeng Jia
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, School of Chemistry and Materials Science, Shanxi Normal University, Taiyuan 030006, China; (T.X.); (G.Z.); (J.J.)
| | - Chaozheng He
- Institute of Environmental and Energy Catalysis, School of Materials Science and Chemical Engineering, Xi’an Technological University, Xi’an 710021, China;
| | - Chenxu Zhao
- Institute of Environmental and Energy Catalysis, School of Materials Science and Chemical Engineering, Xi’an Technological University, Xi’an 710021, China;
- Correspondence: (C.Z.); (H.W.)
| | - Haishun Wu
- Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, School of Chemistry and Materials Science, Shanxi Normal University, Taiyuan 030006, China; (T.X.); (G.Z.); (J.J.)
- Correspondence: (C.Z.); (H.W.)
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37
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Pyykkö P, Taubert S. Saturnenes
Like Th@Au
6
D
6h
: Ring‐Current Evidence for Au−Au Bonding Along the Gold Ring. Isr J Chem 2022. [DOI: 10.1002/ijch.202100139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Pekka Pyykkö
- Department of Chemistry University of Helsinki P.O.B. 55 00014 Helsinki Finland
| | - Stefan Taubert
- Department of Chemistry University of Helsinki P.O.B. 55 00014 Helsinki Finland
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38
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Navrátil J, Otyepka M, Błoński P. OsPd bimetallic dimer pushes the limit of magnetic anisotropy in atom-sized magnets for data storage. NANOTECHNOLOGY 2022; 33:215001. [PMID: 35147526 DOI: 10.1088/1361-6528/ac5447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
The growing gap between the volume of digital data being created and the extent of available storage capacities stimulates intensive research into surface-supported, well-ordered array of atom-sized magnets that represents the ultimate limit of magnetic data storage. Anchoring transition-metal heterodimers in vacancy defects in the graphene lattice has been identified as a vivid strategy to achieve large magnetic anisotropy energy (MAE) up to 80 meV with an easy axis aligned along the dimer bond. In this paper we have made a significant leap forward finding out MAE of 119 meV for an OsPt dimer and 170 meV for an OsPd dimer bound to a single nitrogen-decorated vacancy defect. The system with the highest MAE and with the theoretical storage density of ∼490 Tb·inch-2pushes the current limit of theoretical blocking temperature in graphene-supported transition-metal dimers from ∼20 to ∼44 K assuming the relaxation time of 10 years. The mechanism of the enhanced MAE is discussed.
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Affiliation(s)
- Jan Navrátil
- Department of Physical Chemistry, Faculty of Science, Palacký University Olomouc, tř. 17 listopadu 12, 779 00 Olomouc, Czech Republic
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, 779 00 Olomouc, Czech Republic
| | - Michal Otyepka
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, 779 00 Olomouc, Czech Republic
| | - Piotr Błoński
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, 779 00 Olomouc, Czech Republic
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39
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Wu Q, Wang G, Liu M. On the Sensitivity to Density-Functional Approximations for CO Binding Energies of Single-Atom Catalysts in Nitrogen-Doped Graphene. Chemphyschem 2022; 23:e202100787. [PMID: 35146865 DOI: 10.1002/cphc.202100787] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/13/2021] [Indexed: 12/27/2022]
Abstract
Density functional theory (DFT) methods are the working horse in screening new catalytic materials. They are widely used to predict trends in binding energies, which are then used to compare the activity of different materials. The binding strength of CO is an important descriptor to the CO2 reduction catalytic activity of the single transition metal atoms embedded on nitrogen-doped graphene (TM/NG). In this work, however, we show that CO binding strengths in different TM/NG has very different sensitivity to DFT methods. Specifically, Fe/NG CO binding energy changes dramatically with the percentage of exact exchange in the functional; Co/NG does less so, while Ni/NG nearly has no change. Such varying behaviors is a direct result of different local spin configurations, similar to the performance of DFT methods for metal porphyrin complexes. Therefore, caution should be exercised when using DFT binding energies for quantitative predictions in TM/NG single atom catalysis.
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Affiliation(s)
- Qin Wu
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973, USA
| | - Guangjin Wang
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan, 528000, P. R. China
| | - Mingjie Liu
- Department of Chemical Engineering, MIT, Cambridge, MA 02139, USA
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40
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Aggarwal P, Sarkar D, Awasthi K, Menezes PW. Functional role of single-atom catalysts in electrocatalytic hydrogen evolution: Current developments and future challenges. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214289] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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41
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Küçük H, Akca A. Hydrogen generation from hydrazine on N4 moieties graphene embedded by vanadium metal, DFT calculation. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2021.113539] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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42
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Chutia A. Adsorption of Transition Metal Catalysts on Carbon Supports: A Theoretical Perspective : Understanding the interaction between catalyst and catalyst supports. JOHNSON MATTHEY TECHNOLOGY REVIEW 2022. [DOI: 10.1595/205651322x16212512135401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Adsorption is a fundamental process which takes place on a catalyst surface before it dissociates, diffuses over the surface and recombines with other adsorbed species to form the final product. Therefore, in theoretical chemistry understanding of the local geometrical and electronic
properties of the adsorbed species on the catalyst surface has been a topic of core focus. In this short review we briefly summarise some of the important developments on theoretical studies related to the adsorption properties of transition metal (TM) catalysts on graphene and graphene-related
carbon materials. Prior to this, we will present a discussion on various forms of carbon materials used as catalyst supports, which will be followed by a brief discussion of the fundamentals of the density functional theory (DFT).
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Affiliation(s)
- Arunabhiram Chutia
- School of Chemistry, University of Lincoln Brayford Pool, Lincoln, LN6 7TS UK
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43
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Wang J, Yang Y, Liu H, Dong H, Ding L, Li Y. Adsorption of metal atoms on two-dimensional BC3 and AlC3 nanosheets: Computational studies. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139403] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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44
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Li D, Li S, Zhong C, He J. Tuning magnetism at the two-dimensional limit: a theoretical perspective. NANOSCALE 2021; 13:19812-19827. [PMID: 34825688 DOI: 10.1039/d1nr06835k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The discovery of two-dimensional (2D) magnetic materials provides an ideal testbed for manipulating the magnetic properties at the atomically thin and 2D limit. This review gives recent progress in the emergent 2D magnets and heterostructures, focusing on the theory side. We summarize different theoretical models, ranging from the atomic to micrometer-scale, used to describe magnetic orders. Then, the current strategies for tuning magnetism in 2D materials are further discussed, such as electric field, magnetic field, strain, optics, chemical functionalization, and spin-orbit engineering. Finally, we conclude with the future challenges and opportunities for 2D magnetism.
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Affiliation(s)
- Dongzhe Li
- Institute for Advanced Study, Chengdu University, Chengdu 610100, P. R. China.
| | - Shuo Li
- Institute for Advanced Study, Chengdu University, Chengdu 610100, P. R. China.
| | - Chengyong Zhong
- Institute for Advanced Study, Chengdu University, Chengdu 610100, P. R. China.
| | - Junjie He
- Bremen Center for Computational Materials Science, University of Bremen, Am Fallturm 1, 2835, Bremen, Germany
- Department of Physical and Macromolecular Chemistry & Charles University Centre of Advanced Materials, Faculty of Science, Charles University in Prague, Hlavova 8, Prague 2, 128 43, Czech Republic.
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Wang R, He C, Chen W, Fu L, Zhao C, Huo J, Sun C. Design strategies of two-dimensional metal-organic frameworks toward efficient electrocatalysts for N 2 reduction: cooperativity of transition metals and organic linkers. NANOSCALE 2021; 13:19247-19254. [PMID: 34787144 DOI: 10.1039/d1nr06366a] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Two-dimensional (2D) metal-organic frameworks (MOFs) serve as emerging electrocatalysts due to their high conductivity, chemical tunability, and accessibility of active sites. We herein proposed a series of 2D MOFs with different metal atoms and organic linkers with the formula M3C12X12 (M = Cr, Mo, and W; X = NH, O, S, and Se) to design efficient nitrogen reduction reaction (NRR) electrocatalysts. Our theoretical calculations showed that metal atoms in M3C12X12 can efficiently capture and activate N2 molecules. Among these candidates, W3C12X12 (X = O, S, and Se) show the best NRR performance due to their high activity and selectivity as well as low limiting potential (-0.59 V, -0.14 V, and -0.01 V, respectively). Moreover, we proposed a d-band center descriptor strategy to screen out the high activity and selectivity of M3C12X12 for the NRR. Therefore, our work not only demonstrates a class of promising electrocatalysts for the NRR but also provides a strategy for further predicting the catalytic activity of 2D MOFs.
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Affiliation(s)
- Ran Wang
- Institute of Environmental and Energy Catalysis, Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices, School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an 710021, China.
| | - Chaozheng He
- Institute of Environmental and Energy Catalysis, Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices, School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an 710021, China.
| | - Weixing Chen
- Institute of Environmental and Energy Catalysis, Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices, School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an 710021, China.
| | - Ling Fu
- College of Resources and Environmental Engineering, Tianshui Normal University, Tianshui 741001, China
| | - Chenxu Zhao
- Institute of Environmental and Energy Catalysis, Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices, School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an 710021, China.
| | - Jinrong Huo
- School of Sciences, Xi'an Technological University, Xi'an, Shaanxi 710021, China
| | - Chenghua Sun
- Department of Chemistry and Biotechnology, and Center for Translational Atomaterials, Faculty of Science Engineering & Technology, Swinburne University of Technology, Hawthorn, Victoria, 3122 Australia
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Ali S, Xie Z, Xu H. Stability and Catalytic Performance of Single-Atom Supported on Ti 2 CO 2 for Low-Temperature CO Oxidation: A First-Principles Study. Chemphyschem 2021; 22:2352-2361. [PMID: 34390308 DOI: 10.1002/cphc.202100436] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/10/2021] [Indexed: 11/09/2022]
Abstract
Based on first-principles calculations, the potential of Ti2 CO2 monolayer (MXene) as a single-atom catalyst (SAC) support for 3d transition metal (TM) atoms (Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn) is studied for CO oxidation. We first screen the support effect according to the stability of a single metal atom and find that Sc and Ti supported on Ti2 CO2 have stronger adsorption energy than the cohesive energy of their bulk counterparts and therefore, we selected Sc and Ti supported on Ti2 CO2 for further catalytic reactions. The stability and the potential catalytic reactivity are verified by electronic structure and charge transfer analysis. Both Eley-Rideal (ER) and Langmuir-Hinshelwood (LH) mechanisms are considered in this study, and lower energy barriers of 0.002 and 0.37 eV were found in the ER mechanism compared to the LH mechanism, which are 0.25 and 0.34 eV for Sc and Ti catalysts, respectively. Moreover, kinetic ER and LH mechanisms are favorable for both Sc- and Ti/Ti2 CO2 because of the comparable energy barrier to other metals and SAC supported on 2D materials. However, Ti/Ti2 CO2 catalyst is thermodynamically unfavorable. Based on these calculations, we propose that Sc supported on Ti2 CO2 is the best catalyst for CO-oxidation. The current study not only broadens the scope of the single-atom Sc catalyst but also extends the consideration of MXene support for catalyst optimization.
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Affiliation(s)
- Sajjad Ali
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Zijuan Xie
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China.,Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Hu Xu
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China.,Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen, 518055, China.,Shenzhen Key Laboratory of for Advanced Quantum Functional Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, China
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A First-Principles Study on Titanium-Decorated Adsorbent for Hydrogen Storage. ENERGIES 2021. [DOI: 10.3390/en14206845] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Based on density functional theory calculation, we screened suitable Ti-decorated carbon-based hydrogen adsorbent structures. The adsorption characteristics and adsorption mechanism of hydrogen molecules on the adsorbent were also discussed. The results indicated that Ti-decorated double vacancy (2 × 2) graphene cells seem to be an efficient material for hydrogen storage. Ti atoms are stably embedded on the double vacancy sites above and below the graphene plane, with binding energy higher than the cohesive energy of Ti. For both sides of Ti-decorated double vacancy graphene, up to six H2 molecules can be adsorbed around each Ti atom when the adsorption energy per molecule is −0.25 eV/H2, and the gravimetric hydrogen storage capacity is 6.67 wt.%. Partial density of states (PDOS) analysis showed that orbital hybridization occurs between the d orbital of the adsorbed Ti atom and p orbital of C atom in the graphene layer, while the bonding process is not obvious during hydrogen adsorption. We expect that Ti-decorated double vacancy graphene can be considered as a potential hydrogen storage medium under ambient conditions.
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Wang S, Huang JK, Li M, Azam A, Zu X, Qiao L, Yang J, Li S. Growth of High-Quality Monolayer Transition Metal Dichalcogenide Nanocrystals by Chemical Vapor Deposition and Their Photoluminescence and Electrocatalytic Properties. ACS APPLIED MATERIALS & INTERFACES 2021; 13:47962-47971. [PMID: 34591469 DOI: 10.1021/acsami.1c14136] [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
Two-dimensional transition metal dichalcogenide (TMDC) nanocrystals (NCs) exhibit unique optical and electrocatalytic properties. However, the growth of uniform and high-quality NCs of monolayer TMDC remains a challenge. Until now, most of them are synthesized via a solution-based hydrothermal process or ultrasonic exfoliation method, in which the capping ligands introduced from organic solution often quench the optical and electrocatalytic properties of TMDC NCs. Moreover, it is difficult to homogeneously disperse the solution-based TMDC NCs on a substrate for device fabrication, since the dispersed NCs can easily aggregate. Here, we put forward a novel CVD method to grow closely spaced MoS2 NCs around 5 nm in lateral size. TEM and AFM characterizations demonstrate the monolayer and high-crystalline nature of MoS2 NCs. An obvious blue-shift with 130 meV in photoluminescence signals can be observed. The MoS2 NCs also show an outstanding surface-enhanced Raman scattering for organic molecules due to their localized surface plasmon and abundant edge sites and exhibit excellent electrocatalytic properties for the hydrogen-evolution reaction with a very low onset potential of ∼50 mV and Tafel slope of ∼57 mV/decade. Finally, we further demonstrate this kind of CVD method as a versatile platform for the growth of other TMDC NCs, such as WSe2 and MoSe2 NCs.
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Affiliation(s)
- Shuangyue Wang
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Jing-Kai Huang
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Mengyao Li
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Ashraful Azam
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Xiaotao Zu
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Liang Qiao
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Jack Yang
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Sean Li
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
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49
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What Is the Real State of Single-Atom Catalysts under Electrochemical Conditions—From Adsorption to Surface Pourbaix Plots? Catalysts 2021. [DOI: 10.3390/catal11101207] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The interest in single-atom catalysts (SACs) is increasing, as these materials have the ultimate level of catalyst utilization, while novel reactions where SACs are used are constantly being discovered. However, to properly understand SACs and to further improve these materials, it is necessary to consider the nature of active sites under operating conditions. This is particularly important when SACs are used as electrocatalysts due to harsh experimental conditions, including extreme pH values or high anodic and cathodic potential. In this contribution, density functional theory-based thermodynamic modelling is used to address the nature of metal centers in SACs formed by embedding single metal atoms (Ru, Rh, Ir, Ni, Pd, Pt, Cu, Ag, and Au) into graphene monovacancy. Our results suggest that none of these SAC metal centers are clean at any potential or pH in the water thermodynamic stability region. Instead, metal centers are covered with Hads, OHads, or Oads, and in some cases, we observed the restructuring of the metal sites due to oxygen incorporation. Based on these findings, it is suggested that setting up theoretical models for SAC modelling and the interpretation of ex situ characterization results using ultra-high vacuum (UHV) techniques requires special care, as the nature of SAC active sites under operating conditions can significantly diverge from the basic models or the pictures set by the UHV measurements.
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50
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Song W, Xie K, Guo Y, Fu L, He C. Computational Screening of 3 d Transition Metal Atoms Anchored on Defective Graphene for Efficient Electrocatalytic N 2 Fixation. Chemphyschem 2021; 22:1712-1721. [PMID: 34132010 DOI: 10.1002/cphc.202100257] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 06/05/2021] [Indexed: 11/08/2022]
Abstract
The synthesis of ammonia (NH3 ) through the electrochemical reduction of molecular nitrogen (N2 ) is a promising strategy for significantly reducing energy consumption compared to traditional industrial processes. Herein, we report the design of a series of monovacancy and divacancy defective graphenes decorated with single 3d transition metal atoms (TM@MVG and TM@DVG; TM=Sc-Zn) as electrocatalysts for the nitrogen-reduction reaction (NRR) aided by density functional theory (DFT) calculations. By comparing energies for N2 adsorption as well as the free energies associated with *N2 activation and *N2 H formation, we successfully identified V@MVG, with the lowest potential of -0.63 V, to be an effective catalytic substrate for the NRR in an enzymatic mechanism. Electronic properties, including Bader charges, charge density differences, partial densities of states, and crystal orbital Hamilton populations, are further analyzed in detail. We believe that these results help to explain recent observations in this field and provide guidance for the exploration of efficient electrocatalysts for the NRR.
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Affiliation(s)
- Wei Song
- School of Science, Henan Institute of Technology, Xinxiang, 453003, P.R. China
| | - Kun Xie
- Henan Key Laboratory of Materials on Deep-Earth Engineering School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, Henan, P.R. China
| | - Yongliang Guo
- School of Science, Henan Institute of Technology, Xinxiang, 453003, P.R. China
| | - Ling Fu
- College of Resources and Environmental Engineering, Tianshui Normal University, Tianshui, 741001, P.R. China
| | - Chaozheng He
- Institute of Environmental and Energy Catalysis School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an, 710021, P.R. China.,Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an, Shaanxi, 710021, P.R. China
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