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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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2
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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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3
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Denis PA. Heteroatom Codoped Graphene: The Importance of Nitrogen. ACS OMEGA 2022; 7:45935-45961. [PMID: 36570263 PMCID: PMC9773818 DOI: 10.1021/acsomega.2c06010] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 11/17/2022] [Indexed: 06/17/2023]
Abstract
Although graphene has exceptional properties, they are not enough to solve the extensive list of pressing world problems. The substitutional doping of graphene using heteroatoms is one of the preferred methods to adjust the physicochemical properties of graphene. Much effort has been made to dope graphene using a single dopant. However, in recent years, substantial efforts have been made to dope graphene using two or more dopants. This review summarizes all the hard work done to synthesize, characterize, and develop new technologies using codoped, tridoped, and quaternary doped graphene. First, I discuss a simple question that has a complicated answer: When can an atom be considered a dopant? Then, I briefly discuss the single atom doped graphene as a starting point for this review's primary objective: codoped or dual-doped graphene. I extend the discussion to include tridoped and quaternary doped graphene. I review most of the systems that have been synthesized or studied theoretically and the areas in which they have been used to develop new technologies. Finally, I discuss the challenges and prospects that will shape the future of this fascinating field. It will be shown that most of the graphene systems that have been reported involve the use of nitrogen, and much effort is needed to develop codoped graphene systems that do not rely on the stabilizing effects of nitrogen. I expect that this review will contribute to introducing more researchers to this fascinating field and enlarge the list of codoped graphene systems that have been synthesized.
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Du J, Xin Y, Dong M, Yang J, Xu Q, Liu H, Han B. Copper/Carbon Heterogenous Interfaces for Enhanced Selective Electrocatalytic Reduction of CO 2 to Formate. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2102629. [PMID: 34510751 DOI: 10.1002/smll.202102629] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 07/13/2021] [Indexed: 06/13/2023]
Abstract
Electrochemical reduction of CO2 (CO2 RR) to formate is a promising route to prepare value-added chemical. Developing low-cost and efficient electrocatalysts with high product selectivity is still a grand challenge. Herein, a novel Cu anchored on hollow carbon spheres catalysts (HCS/Cu-x, x represents the mass of CuCl2 added in the system) is designed with controllable copper/carbon heterogenous interfaces. Rich copper/carbon heterogenous interfaces and hollow structure of optimized HCS/Cu-0.12 catalyst are beneficial to charge transmission. Compared with the CO2 RR occurred in aqueous electrolyte over Cu-based catalyst that has been reported to date, it exhibits highest formate Faradaic efficiency (FE) of 82.4% with a current density of 26 mA cm-2 and remarkable stability in a H-cell.
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Affiliation(s)
- Juan Du
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yu Xin
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Minghua Dong
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Junjuan Yang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Qingling Xu
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Huizhen Liu
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Buxing Han
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
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Chen X, Qin R, Li Z, Shan S, Liu Y, Yang C. One-pot synthesis of Fe/Cu/N-doped carbon materials derived from shale oil for efficient oxygen reduction reaction. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2020.111330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Copper- and Nitrogen-Codoped Graphene with Versatile Catalytic Performances for Fenton-Like Reactions and Oxygen Reduction Reaction. Catalysts 2020. [DOI: 10.3390/catal10111326] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Copper- and nitrogen-codoped reduced graphene oxide material (Cu/N-rGO) was prepared with a hydrothermal method. Its versatile catalytic performances were demonstrated toward the oxidative degradation of rhodamine B (RhB) and oxygen reduction reaction (ORR). The Cu and N codoping of graphene enhanced not only its activation ability toward H2O2, but also its electrocatalytic ability for ORR. It was observed that the use of 3%Cu/N-rGO together with 40 mmol·L−1 H2O2 and 4 mmol·L−1 Na2CO3 could remove more than 94% of the added RhB (30 mg·L−1) in 20 min through a catalytic Fenton-like degradation. Quenching experiments and electron paramagnetic resonance (EPR) measurements indicated that the main reactive species generated in the catalytic oxidation process were surface-bound •OH. The modified graphene also showed good electrocatalytic activity for ORR reaction in alkaline media through a four-electron mechanism. On the electrode of Cu/N-rGO, the ORR reaction exhibited an onset potential of −0.1 V and a half-wave potential of −0.248 V, which were correspondingly close to those on a Pt/C electrode. In comparison with a Pt/C electrode, the 3%Cu/N-rGO electrode showed much greater tolerance to methanol. Such outstanding catalytic properties are attributed to the abundant active sites and the synergism between Cu and N in Cu/N-rGO.
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Preparation and Characterization of Nitrogen-Riched Polymer Based Materials and the Role of Cu–N Active Site in Promoting the ORR Activity of the Catalyst. CATALYSIS SURVEYS FROM ASIA 2020. [DOI: 10.1007/s10563-020-09299-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Li J, Xia W, Wang T, Zheng L, Lai Y, Pan J, Jiang C, Song L, Wang M, Zhang H, Chen N, Chen G, He J. A Facile Route for Constructing Effective Cu-N x Active Sites for Oxygen Reduction Reaction. Chemistry 2019; 26:4070-4079. [PMID: 31633249 DOI: 10.1002/chem.201903822] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/09/2019] [Indexed: 11/10/2022]
Abstract
The coordination number between copper and nitrogen in copper/nitrogen-based electrocatalysts is important for boosting the oxygen reduction reaction (ORR). However, it is difficult to control unsaturated copper/nitrogen constructions as well as to compare their ORR performances in similar carbon matrices in a simple yet efficient manner. In this study, we have easily attained two types of Cu+ -N2 and Cu2+ -N4 constructions simply by etching pyrolyzed Cu-doped zeolitic imidazolate framework nanoleaves (Cu-ZIF-L) with sulfuric acid or nitric acid, respectively. X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectra were recorded to further confirm the different copper/nitrogen constructions after the different acid treatments. Electrochemical studies have demonstrated that Cu+ -N2 sites are more active in boosting the ORR performance than Cu2+ -N4 sites. Furthermore, Cu-N/C-H2 SO4 , used as an air cathode in a zinc-air battery, exhibited excellent performance and stability.
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Affiliation(s)
- Jingjing Li
- College of Materials Science and Technology, Jiangsu Key Laboratory of, Electrochemical Energy Storage Technologies, Nanjing University of, Aeronautics and Astronautics, 210016, Nanjing, P. R. China
| | - Wei Xia
- College of Materials Science and Technology, Jiangsu Key Laboratory of, Electrochemical Energy Storage Technologies, Nanjing University of, Aeronautics and Astronautics, 210016, Nanjing, P. R. China
| | - Tao Wang
- College of Materials Science and Technology, Jiangsu Key Laboratory of, Electrochemical Energy Storage Technologies, Nanjing University of, Aeronautics and Astronautics, 210016, Nanjing, P. R. China
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yue Lai
- College of Materials Science and Technology, Jiangsu Key Laboratory of, Electrochemical Energy Storage Technologies, Nanjing University of, Aeronautics and Astronautics, 210016, Nanjing, P. R. China
| | - Junjie Pan
- College of Materials Science and Technology, Jiangsu Key Laboratory of, Electrochemical Energy Storage Technologies, Nanjing University of, Aeronautics and Astronautics, 210016, Nanjing, P. R. China
| | - Cheng Jiang
- College of Materials Science and Technology, Jiangsu Key Laboratory of, Electrochemical Energy Storage Technologies, Nanjing University of, Aeronautics and Astronautics, 210016, Nanjing, P. R. China
| | - Li Song
- College of Materials Science and Technology, Jiangsu Key Laboratory of, Electrochemical Energy Storage Technologies, Nanjing University of, Aeronautics and Astronautics, 210016, Nanjing, P. R. China
| | - Mengyu Wang
- College of Materials Science and Technology, Jiangsu Key Laboratory of, Electrochemical Energy Storage Technologies, Nanjing University of, Aeronautics and Astronautics, 210016, Nanjing, P. R. China
| | - Huting Zhang
- College of Materials Science and Technology, Jiangsu Key Laboratory of, Electrochemical Energy Storage Technologies, Nanjing University of, Aeronautics and Astronautics, 210016, Nanjing, P. R. China
| | - Na Chen
- College of Materials Science and Technology, Jiangsu Key Laboratory of, Electrochemical Energy Storage Technologies, Nanjing University of, Aeronautics and Astronautics, 210016, Nanjing, P. R. China
| | - Guang Chen
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jianping He
- College of Materials Science and Technology, Jiangsu Key Laboratory of, Electrochemical Energy Storage Technologies, Nanjing University of, Aeronautics and Astronautics, 210016, Nanjing, P. R. China
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Li H, Ma H, Liu T, Ni J, Wang Q. An excellent alternative composite modifier for cathode catalysts prepared from bacterial cellulose doped with Cu and P and its utilization in microbial fuel cell. BIORESOURCE TECHNOLOGY 2019; 289:121661. [PMID: 31234073 DOI: 10.1016/j.biortech.2019.121661] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 06/14/2019] [Accepted: 06/16/2019] [Indexed: 06/09/2023]
Abstract
In this study, bacterial cellulose doped with phosphorus and copper via freeze-drying and high-temperature pyrolysis was used to prepare MFC cathode catalysts. After a series of characterization, the synthesized catalyst showed a three-dimensional network with a specific surface area of 580.09 m2/g. Due to the doping of Cu and P, more active sites were induced in the pores of bacterial cellulose and subsequently improved catalytic activity. The prepared catalyst was coated on the air cathode surface of the MFC to obtain the maximum output power and current density of 1177.31 mW/m2 and 6.73 A/m2, respectively, which were higher than those of Pt (1044.93 mW/m2 and 6.02 A/m2). This work aimed to improve bioelectrical generation in MFC and find alternative commercial Pt catalysts.
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Affiliation(s)
- Huiyu Li
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, China
| | - Hongzhi Ma
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, China; Tianjin Sunenergy Sega Environmental Science & Technology Co. Ltd, Tianjin 300380, China.
| | - Ting Liu
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, China
| | - Jin Ni
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, China
| | - Qunhui Wang
- Department of Environmental Engineering, University of Science and Technology Beijing, 100083, China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, China
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Lu X, Du L, Wang D, Yang P, Liu L, Zhang J, An M, Levin O, Wang J, Ge L. Highly Dispersed Cu−NX
Moieties Embedded in Graphene: A Promising Electrocatalyst towards the Oxygen Reduction Reaction. ChemElectroChem 2018. [DOI: 10.1002/celc.201800657] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xiangyu Lu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry; Chemical Engineering Harbin Institute of Technology; Harbin 150001 China
| | - Lei Du
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry; Chemical Engineering Harbin Institute of Technology; Harbin 150001 China
| | - Dan Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry; Chemical Engineering Harbin Institute of Technology; Harbin 150001 China
| | - Peixia Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry; Chemical Engineering Harbin Institute of Technology; Harbin 150001 China
| | - Lilai Liu
- College of Environmental and Chemical Engineering; Heilongjiang University of Science and Technology; Harbin 150022 China
| | - Jinqiu Zhang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry; Chemical Engineering Harbin Institute of Technology; Harbin 150001 China
| | - Maozhong An
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry; Chemical Engineering Harbin Institute of Technology; Harbin 150001 China
| | - Oleg Levin
- Saint Petersburg University; 7/9 Universitetskaya Nab. St. Petersburg 199034 Russian Federation
| | - Jinpeng Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry; Chemical Engineering Harbin Institute of Technology; Harbin 150001 China
| | - Liping Ge
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry; Chemical Engineering Harbin Institute of Technology; Harbin 150001 China
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Wang S, Teng Z, Wang C, Wang G. Stable and Efficient Nitrogen-Containing Carbon-Based Electrocatalysts for Reactions in Energy-Conversion Systems. CHEMSUSCHEM 2018; 11:2267-2295. [PMID: 29770593 DOI: 10.1002/cssc.201800509] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 04/21/2018] [Indexed: 05/14/2023]
Abstract
High activity and stability are crucial for the practical use of electrocatalysts in fuel cells, metal-air batteries, and water electrolysis, including the oxygen reduction reaction, hydrogen evolution reaction, oxygen evolution reaction, and oxidation reactions of formic acid and alcohols. Electrocatalysts based on nitrogen-containing carbon (N-C) materials show promise in catalyzing these reactions; however, there is no systematic review of strategies for the engineering of active and stable N-C-based electrocatalysts. Herein, a comprehensive comparison of recently reported N-C-based electrocatalysts regarding both electrocatalytic activity and long-term stability is presented. In the first part of this review, the relationships between the electrocatalytic reactions and selection of the element to modify the N-C-based materials are discussed. Afterwards, synthesis methods for N-C-based electrocatalysts are summarized, and strategies for the synthesis of highly stable N-C-based electrocatalysts are presented. Multiple tables containing data on crucial parameters for both electrocatalytic activity and stability are displayed in this review. Finally, constructing M-Nx moieties is proposed as the most promising engineering strategy for stable N-C-based electrocatalysts.
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Affiliation(s)
- Sicong Wang
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring, Yangzhou University, 180 Si-Wang-Ting Road, Yangzhou, 225002, PR China
| | - Zhengyuan Teng
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring, Yangzhou University, 180 Si-Wang-Ting Road, Yangzhou, 225002, PR China
| | - Chengyin Wang
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring, Yangzhou University, 180 Si-Wang-Ting Road, Yangzhou, 225002, PR China
| | - Guoxiu Wang
- Center for Clean Energy Technology, Faculty of Science, University of Technology Sydney, Broadway, Sydney, NSW, 2007, Australia
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12
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Dong R, Zhang T, Feng X. Interface-Assisted Synthesis of 2D Materials: Trend and Challenges. Chem Rev 2018; 118:6189-6235. [DOI: 10.1021/acs.chemrev.8b00056] [Citation(s) in RCA: 378] [Impact Index Per Article: 63.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Renhao Dong
- Department of Chemistry and Food Chemistry & Center for Advancing Electronics Dresden, Technische Universität Dresden, 01062 Dresden, Germany
| | - Tao Zhang
- Department of Chemistry and Food Chemistry & Center for Advancing Electronics Dresden, Technische Universität Dresden, 01062 Dresden, Germany
| | - Xinliang Feng
- Department of Chemistry and Food Chemistry & Center for Advancing Electronics Dresden, Technische Universität Dresden, 01062 Dresden, Germany
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Yan X, Sun J, Meng Y. Experimental insight into the chemical corrosion mechanism of copper with an oil-in-water emulsion solution. RSC Adv 2018; 8:9833-9840. [PMID: 35540817 PMCID: PMC9078718 DOI: 10.1039/c8ra00432c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 02/26/2018] [Indexed: 11/21/2022] Open
Abstract
Chemical corrosion mechanism of copper in an oil-in-water (O/W) emulsion is worthy of study since it would contribute to emulsion-lubrication in a metal-working process and for copper storage. The immersion experiments were carried out and the corrosion rates were measured using the weight-loss method. Surface morphology of the copper specimen was observed using a scanning electron microscope (SEM). The compositions of the corrosive residues were analyzed using an energy dispersive spectrometer (EDS) and an X-ray photoelectron spectrometer (XPS). It was found that the corrosion rate of copper in an emulsion linearly increases and the kinetics relationship could be deduced as D 1 = 2.66 × 10-3 t 11.68 at room temperature (25 °C). After 1488 h of immersion time, the corrosion products on the copper surface were determined to be Cu2O, CuO, Cu(OH)2, CuCO3 and Cu2(OH)2CuCO3, which also changed the appearance of the emulsion. During adsorption, copper is more likely to coordinate with hydroxide, carboxylate or ester anions to generate copper compounds. The surfactants were consumed and the efficiency of emulsification characteristics was lost and finally, the O/W emulsion separated into two layers, which might hint the significance of introducing an inhibitor to protect the copper surfaces.
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Affiliation(s)
- Xudong Yan
- School of Materials Science and Engineering, University of Science and Technology Beijing Beijing 100083 China +86 10 62333768
| | - Jianlin Sun
- School of Materials Science and Engineering, University of Science and Technology Beijing Beijing 100083 China +86 10 62333768
| | - Yanan Meng
- School of Materials Science and Engineering, University of Science and Technology Beijing Beijing 100083 China +86 10 62333768
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14
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Lu X, Wang D, Ge L, Xiao L, Zhang H, Liu L, Zhang J, An M, Yang P. Enriched graphitic N in nitrogen-doped graphene as a superior metal-free electrocatalyst for the oxygen reduction reaction. NEW J CHEM 2018. [DOI: 10.1039/c8nj04857f] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The active center of N-G catalysts for ORR is confirmed to be related to the graphitic N, and the total N content in N-G catalysts is not the key factors to determine the ORR activity.
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Affiliation(s)
- Xiangyu Lu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin
- China
| | - Dan Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin
- China
| | - Liping Ge
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin
- China
| | - Lihui Xiao
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin
- China
| | - Haiyan Zhang
- College of Life Science
- Henan University
- Kaifeng
- China
| | - Lilai Liu
- College of Environmental and Chemical Engineering
- Heilongjiang University of Science and Technology
- Harbin
- China
| | - Jinqiu Zhang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin
- China
| | - Maozhong An
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin
- China
| | - Peixia Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin
- China
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