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Wu Y, Shuang W, Yang L, Cao C. One-step pyrolysis synthesis of ternary (P,S,N)-doped graphene as an efficient metal-free electrocatalyst for the oxygen reduction reaction. Dalton Trans 2023; 52:4389-4397. [PMID: 36916181 DOI: 10.1039/d2dt04124c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
Graphene-based materials have been regarded recently as a promising substance for electrochemical energy conversion and storage devices owing to their unique structure and extraordinary properties. Herein, an enormously facile one-step pyrolysis approach is reported for the fabrication of ternary (P,S,N)-doped graphene, which is further investigated as an efficient metal-free electrocatalyst for the oxygen reduction reaction (ORR). Furthermore, optimized ternary-doped graphene can deliver excellent ORR catalytic activity that favors the four-electron ORR process and outstanding long-term durability (90.54% current retention after 20000 s which is far superior to that of commercial Pt/C) owing to the preferable synergetic coupling effect between P, S and N. Density functional theory (DFT) calculations were performed to reveal the synergetic coupling effect between doping elements in the ORR process. This work provides an extremely simple one-step pyrolysis method for the synthesis of P,S,N-doped graphene for electrochemical energy conversion and storage devices.
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Affiliation(s)
- Yujun Wu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, P. R. China.,Research Center of Materials Science and Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Beijing Institute of Technology, Beijing 100081, P. R. China.
| | - Wei Shuang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, P. R. China
| | - Lin Yang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, P. R. China
| | - Chuanbao Cao
- Research Center of Materials Science and Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Beijing Institute of Technology, Beijing 100081, P. R. China.
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Wu Y, Yuan Y, Shuang W, Wang L, Yang L, Bai Z, Lu J. Reducing Carbonaceous Salts for Facile Fabrication of Monolayer Graphene. SMALL METHODS 2023; 7:e2201596. [PMID: 36703553 DOI: 10.1002/smtd.202201596] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/25/2022] [Indexed: 06/18/2023]
Abstract
Novel methods and mechanisms for graphene fabrication are of great importance in the development of materials science. Herein, a facile method to directly convert carbonaceous salts into high-quality freestanding graphene via a simple one-step redox reaction, is reported. The redox couple can be a combination of sodium borohydride (reductant) and sodium carbonate (oxidant), which can readily react with each other when evenly mixed/calcined and yield gram-scale, high-quality, contamination-free, micron-sized, freestanding graphene. More importantly, this method is applicable to a variety of input reductants and oxidants that are low cost and easily accessible. An in-depth investigation reveals that the carbonaceous oxidants can not only provide reduced carbon mass for graphene formation but also act as a self-template to guide the polymerization of carbon atoms following the pattern of the monolayer, six-carbon rings. In addition, the direct formation of graphene exhibits theoretically lower energy barriers than that of other allotropes such as fullerene and carbon nanotube. This facile, low-cost, scalable, and applicable method for mass production of high-quality graphene is expected to revolutionize graphene fabrication technology and boost its practical application to the industry level.
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Affiliation(s)
- Yujun Wu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, China
| | - Yifei Yuan
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325027, China
| | - Wei Shuang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, China
| | - Liguang Wang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Lin Yang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, China
| | - Zhengyu Bai
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, China
| | - Jun Lu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
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An Overview of Graphene-Based 2D/3D Nanostructures for Photocatalytic Applications. Top Catal 2022. [DOI: 10.1007/s11244-021-01539-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Jiménez-González AF, Ramírez-de-Arellano JM, Magaña LF. Substantial Variations in the Optical Absorption and Reflectivity of Graphene When the Concentrations of Vacancies and Doping with Fluorine, Nitrogen, and Oxygen Change. Int J Mol Sci 2021; 22:6832. [PMID: 34202099 PMCID: PMC8269099 DOI: 10.3390/ijms22136832] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 06/20/2021] [Indexed: 11/17/2022] Open
Abstract
We performed ab initio numerical simulations with the density functional theory to investigate the variations in the band structure, optical absorption, and the reflectivity of vacancy-graphene doped with nitrogen, oxygen, and fluorine for different densities. We considered the density values 0.78%, 1.02%, 1.39%, 2.00%, 3.12%, 5.55%, and 12.5% for the vacancies and doping. In the infrared and visible ranges for all cases, vacancies included, there is a substantial increment in the absorption and reflectivity concerning graphene. The most significant changes are for fluorine and oxygen at a concentration of 12.5%.
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Affiliation(s)
| | | | - Luis Fernando Magaña
- Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20-364, Ciudad de México 01000, Mexico;
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Nuilek K, Wongwiriyapan W, Sattayarut V, Simon A, Koncz-Horváth D, Ferenczi T, Kristály F, Baumli P. Comparison of acid exfoliators in carbon nanosheets synthesis from stinging nettle (Urtica dioica) for electrochemical applications. Sci Rep 2020; 10:17270. [PMID: 33057126 PMCID: PMC7560823 DOI: 10.1038/s41598-020-74286-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 09/24/2020] [Indexed: 12/03/2022] Open
Abstract
Carbon nanosheets (CNs) were successfully synthesized from nettle stem (NS) which is an inexpensive material with a high carbon content that is abundantly available in nature. CNs were produced using chemical (potassium hydroxide activation and acid exfoliation) and thermal treatments. Sulfuric (H2SO4), phosphoric (H3PO4) and nitric (HNO3) acid solutions were used for exfoliation. CNs exfoliated by H3PO4 have higher specific surface area (789 m2 g-1) compared to CNs exfoliated by H2SO4 (705 m2 g-1) and HNO3 (106 m2 g-1). In this work, NSCNs were found to be a potential candidate for electrode material in electrochemical capacitors. The maximum specific capacitance of the NSCNs exfoliated by H3PO4 is found to be 27.3 F g-1 at a current density of 0.05 A g-1, while the specific capacitance of NSCNs exfoliated by H2SO4 and HNO3 is 9.34 F g-1 and 1.71 F g-1, respectively. Energy density (0.06-0.95 Wh kg-1) and power density (20.9-26.7 W kg-1) of NSCNs are confirmed to be supercapacitor materials and can be applied in energy storage devices.
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Affiliation(s)
- Kanokon Nuilek
- Institute of Ceramics and Polymer Engineering, University of Miskolc, Miskolc, 3515, Hungary.
- Institute of Metallurgy, Metal Forming and Nanotechnology, University of Miskolc, Miskolc, 3515, Hungary.
| | - Winadda Wongwiriyapan
- College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Rd., Ladkrabang, Bangkok, 10520, Thailand
| | - Vichuda Sattayarut
- College of Nanotechnology, King Mongkut's Institute of Technology Ladkrabang, Chalongkrung Rd., Ladkrabang, Bangkok, 10520, Thailand
| | - Andrea Simon
- Institute of Ceramics and Polymer Engineering, University of Miskolc, Miskolc, 3515, Hungary
| | - Daniel Koncz-Horváth
- Institute of Metallurgy, Metal Forming and Nanotechnology, University of Miskolc, Miskolc, 3515, Hungary
| | - Tibor Ferenczi
- Institute of Metallurgy, University of Miskolc, Miskolc, 3515, Hungary
| | - Ferenc Kristály
- Institute of Mineralogy and Geology, University of Miskolc, Miskolc, 3515, Hungary
| | - Peter Baumli
- Institute of Metallurgy, Metal Forming and Nanotechnology, University of Miskolc, Miskolc, 3515, Hungary.
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Głuchowski P, Tomala R, Jeżowski A, Szewczyk D, Macalik B, Smolina I, Kurzynowski T, Stręk W. Preparation and physical characteristics of graphene ceramics. Sci Rep 2020; 10:11121. [PMID: 32632330 PMCID: PMC7338476 DOI: 10.1038/s41598-020-67977-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 05/14/2020] [Indexed: 11/18/2022] Open
Abstract
Graphene, a two-dimensional structure of carbon, due to its structure has unique physico-chemical properties that can be used in numerous research and industry areas. Although this structure is already well known, there are still technological (and cost) barriers which do not allow to produce this material in large quantities and hence prevent its use in various applications. For this reason, many technologies are currently being developed to obtain graphene in forms that would enable its widespread use. The graphene-like ceramics were fabricated by the high isostatic pressure method at different temperatures. This technique allows to obtain dense ceramics with various shapes. The structure and morphology of sintered graphene were investigated by XRD, SEM and the Raman spectroscopy. The hardness, thermal conductivity and electric transport measurements recorded in a wide range of temperatures were used to analyze the physical properties of the obtained ceramics.
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Affiliation(s)
- P Głuchowski
- Institute for Low Temperature and Structure Research, Polish Academy of Sciences, 50422, Wroclaw, Poland.
| | - R Tomala
- Institute for Low Temperature and Structure Research, Polish Academy of Sciences, 50422, Wroclaw, Poland
| | - A Jeżowski
- Institute for Low Temperature and Structure Research, Polish Academy of Sciences, 50422, Wroclaw, Poland
| | - D Szewczyk
- Institute for Low Temperature and Structure Research, Polish Academy of Sciences, 50422, Wroclaw, Poland
| | - B Macalik
- Institute for Low Temperature and Structure Research, Polish Academy of Sciences, 50422, Wroclaw, Poland
| | - I Smolina
- Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, 50370, Wroclaw, Poland
| | - T Kurzynowski
- Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, 50370, Wroclaw, Poland
| | - W Stręk
- Institute for Low Temperature and Structure Research, Polish Academy of Sciences, 50422, Wroclaw, Poland
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