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Zhang T, Zhao Z, Li T, Diao Q, Lv L, Li Z. A highly efficient electrocatalyst for oxygen reduction reaction: Spinel MnCo2O4 nanoparticles supported on three-dimensional Nitrogen-doped graphene material with interconnected hierarchical porous nanostructure. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Wang H, Chen X, Sun T, Li Y, Lv X, Li Y, Wang H. Cobalt nanoparticles embedded into nitrogen-doped graphene with abundant macropores as a bifunctional electrocatalyst for rechargeable zinc-air batteries. Chem Asian J 2022; 17:e202200390. [PMID: 35582772 DOI: 10.1002/asia.202200390] [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: 04/13/2022] [Revised: 05/12/2022] [Indexed: 11/11/2022]
Abstract
Nitrogen doped carbon materials containing transition metal nanoparticles have attracted much attention as bifunctional oxygen electrocatalysts. In this paper, the template etching method is used to obtain the nitrogen-doped graphene with abundant macropores embedded with cobalt nanoparticles (Co@N-C). The prepared Co@NC-800 catalyst has a half-wave potential (E 1/2= 0.835V) close to Pt/C and good stability in excess of Pt/C for oxygen reduction reaction (ORR). At the same time, the catalyst has good oxygen evolution reaction (OER) performance. In addition, zinc-air batteries (ZABs) based on the Co@NC-800 catalyst show good cycle stability of up to 200000 s and high power density of 73.5 mW cm -2 . The synergistic effect of the integrated component between nitrogen-doped graphene and cobalt nanoparticles as well as the macroporous structure endow Co@NC-800 with abundant exposed active sites and mass/electron transfer capacity, thus leading to the high electrocatalytic activity. This work shows potential for practical applications in electrochemistry.
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Affiliation(s)
- Han Wang
- Changchun University of Science and Technology, School of Materials Science and Engineering, CHINA
| | - Xinyu Chen
- Changchun University of Science and Technology, School of Materials Science and Engineering, CHINA
| | - Tiantian Sun
- Changchun University of Science and Technology, School of Materials Science and Engineering, CHINA
| | - Yanwei Li
- Changchun University of Science and Technology, School of Materials Science and Engineering, CHINA
| | - Xiaoling Lv
- Changchun University of Science and Technology, School of Materials Science and Engineering, CHINA
| | - Yanhui Li
- Changchun University of Science and Technology, School of Materials Science and Engineering, CHINA
| | - Hengguo Wang
- Northeast Normal University, Faculty of Chemistry, 7989 Weixing Road, 130022, Changchun, CHINA
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Zhang H, Li Y, Han G. Nitrogen‐doped Graphene Loaded with Cobalt Nanoparticles as Efficient Electrocatalysts for Oxygen Reduction Reaction. ChemistrySelect 2022. [DOI: 10.1002/slct.202103806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Hong Zhang
- Institute of Molecular Science Key Lab. of Materials for Energy Conversion and Storage of Shanxi Province Key Lab. of Chemical Biology and Molecular Engineering of Education Ministry Shanxi Univeristy Taiyuan 030006 China
| | - Yanping Li
- Institute of Molecular Science Key Lab. of Materials for Energy Conversion and Storage of Shanxi Province Key Lab. of Chemical Biology and Molecular Engineering of Education Ministry Shanxi Univeristy Taiyuan 030006 China
| | - Gaoyi Han
- Institute of Molecular Science Key Lab. of Materials for Energy Conversion and Storage of Shanxi Province Key Lab. of Chemical Biology and Molecular Engineering of Education Ministry Shanxi Univeristy Taiyuan 030006 China
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Zahoor A, Faizan R, Elsaid K, Hashmi S, Butt FA, Ghouri ZK. Synthesis and experimental investigation of δ-MnO2/N-rGO nanocomposite for Li-O2 batteries applications. CHEMICAL ENGINEERING JOURNAL ADVANCES 2021. [DOI: 10.1016/j.ceja.2021.100115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Liu H, Huang X, Lu Z, Wang T, Zhu Y, Cheng J, Wang Y, Wu D, Sun Z, Robertson AW, Chen X. Trace metals dramatically boost oxygen electrocatalysis of N-doped coal-derived carbon for zinc-air batteries. NANOSCALE 2020; 12:9628-9639. [PMID: 32319453 DOI: 10.1039/c9nr10800a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The commercialization of metal-air batteries requires efficient, low-cost, and stable bifunctional electrocatalysts for reversible electrocatalysis of the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). The modification of natural coal by heteroatoms such as N and S, or metal oxide species, has been demonstrated to form very promising electrocatalysts for the ORR and OER. However, it remains elusive and underexplored as to how the impurity elements in coal may impact the electrocatalytic properties of coal-derived catalysts. Herein, we explore the influence of the presence of various trace metals that are notable impurities in coal, including Al, Si, Ca, K, Fe, Mg, Co, Mn, Ni, and Cu, on the electrochemical performance of the prepared catalysts. The constructed Zn-air batteries are further shown to be able to power green LED lights for more than 80 h. The charge-discharge polarization curves exhibited excellent and durable rechargeability over 500 (ca. 84 h) continuous cycles. The promotional effect of the trace elements is believed to accrue from a combination of electronic structure modification of the active sites, enhancement of the active site density, and formation of a conductive 3-dimensional hierarchical network of carbon nanotubes.
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Affiliation(s)
- Huimin Liu
- Research Group of Functional Materials for Electrochemical Energy Conversion, School of Chemical Engineering, University of Science and Technology Liaoning, Qianshan Middle Road 185, 114051 Anshan, P. R. China.
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Han M, Jayakumar A, Li Z, Zhao Q, Zhang J, Jiang X, Guo X, Wang R, Xu C, Song S, Lee JM, Hu N. Fabricating 3D Macroscopic Graphene-Based Architectures with Outstanding Flexibility by the Novel Liquid Drop/Colloid Flocculation Approach for Energy Storage Applications. ACS APPLIED MATERIALS & INTERFACES 2018; 10:21991-22001. [PMID: 29939002 DOI: 10.1021/acsami.8b02942] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Inspired by "water ripples" in nature and the flocculation phenomenon in colloid chemistry, a novel liquid drop/colloid flocculation approach is developed to fabricate an extremely flexible and compressible 3D macroscopic graphene-based architecture (hydrogels or aerogels), via a new coagulation-induced self-assembly mechanism. This facile and universal technique can be achieved in a neutral, acidic, or basic coagulation bath, producing microsized hydrogels with various structures, such as mushroom, circle, disc shapes, etc. The method also allows us to introduce various guest materials in the graphene matrix using transition metal salts as the coagulating bath. A mushroom-shaped NiCo oxide/GS hybrid aerogel (diameter: 3 mm) is prepared as an example, with ultrathin NiCo oxide nanosheets in situ grown onto the surface of graphene. By employing as binder-free electrodes, these hybrid aerogels exhibit a specific capacitance of 858.3 F g-1 at 2 A g-1, as well as a good rate capability and cyclic stability. The asymmetric supercapacitor, assembling with the hybrid aerogels as cathode and graphene hydrogels as anode materials, could deliver an energy density of 21 Wh kg-1 at power density of 4500 W kg-1. The ease of synthesis and the feasibility of obtaining highly flexible aerogels with varied morphologies and compositions make this method a promising one for use in the field of biotechnology, electrochemistry, flexible electronics, and environment applications.
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Affiliation(s)
- Meng Han
- College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions , Chongqing University , Chongqing 400044 , China
| | - Anjali Jayakumar
- School of Chemical and Biomedical Engineering , Nanyang Technological University , Singapore 637459 , Singapore
| | - Zongheng Li
- College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions , Chongqing University , Chongqing 400044 , China
| | - Qiannan Zhao
- College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions , Chongqing University , Chongqing 400044 , China
| | - Junming Zhang
- School of Chemical and Biomedical Engineering , Nanyang Technological University , Singapore 637459 , Singapore
| | - Xiaoping Jiang
- College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions , Chongqing University , Chongqing 400044 , China
| | - Xiaolong Guo
- College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions , Chongqing University , Chongqing 400044 , China
| | - Ronghua Wang
- College of Materials Science and Engineering , Chongqing University , Chongqing 400044 , China
| | - Chaohe Xu
- College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions , Chongqing University , Chongqing 400044 , China
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems of the Ministry of Education of China , Chongqing 400044 , China
| | - Shufeng Song
- College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions , Chongqing University , Chongqing 400044 , China
| | - Jong-Min Lee
- School of Chemical and Biomedical Engineering , Nanyang Technological University , Singapore 637459 , Singapore
| | - Ning Hu
- College of Aerospace Engineering, and The State Key Laboratory of Mechanical Transmissions , Chongqing University , Chongqing 400044 , China
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Nie Q, Cai Y, Xu N, Peng L, Qiao J. Highly Stabilized Zinc-Air Batteries Based on Nanostructured Co3O4Composites as Efficient Bifunctional Electrocatalyst. ChemElectroChem 2018. [DOI: 10.1002/celc.201800159] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Qi Nie
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry College of Environmental Science and Engineering; Donghua University; Shanghai 201620 P.R. China
| | - Yixiao Cai
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry College of Environmental Science and Engineering; Donghua University; Shanghai 201620 P.R. China
- Shanghai Institute of Pollution Control and Ecological Security; Shanghai 200092 P.R. China
- NUS Environmental Research Institute; National University of Singapore; 1 Create Way Singapore 138602 Singapore
| | - Nengneng Xu
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry College of Environmental Science and Engineering; Donghua University; Shanghai 201620 P.R. China
| | - Luwei Peng
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry College of Environmental Science and Engineering; Donghua University; Shanghai 201620 P.R. China
| | - Jinli Qiao
- State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry College of Environmental Science and Engineering; Donghua University; Shanghai 201620 P.R. China
- Shanghai Institute of Pollution Control and Ecological Security; Shanghai 200092 P.R. China
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Wang R, Chen Z, Hu N, Xu C, Shen Z, Liu J. Nanocarbon-Based Electrocatalysts for Rechargeable Aqueous Li/Zn-Air Batteries. ChemElectroChem 2018. [DOI: 10.1002/celc.201800141] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ronghua Wang
- College of Materials Science and Engineering; Chongqing University; Chongqing 400044 P.R. China
| | - Zhen Chen
- Division of Physics and Applied Physics; School of Physical and Mathematical Sciences; Nanyang Technological University; 637371 Singapore
| | - Ning Hu
- The State Key Laboratory of Mechanical Transmissions, and College of Aerospace Engineering; Chongqing University; Chongqing 400044 P.R. China
| | - Chaohe Xu
- The State Key Laboratory of Mechanical Transmissions, and College of Aerospace Engineering; Chongqing University; Chongqing 400044 P.R. China
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems of the Ministry of Education of China; Chongqing 400044 China
| | - Zexiang Shen
- Division of Physics and Applied Physics; School of Physical and Mathematical Sciences; Nanyang Technological University; 637371 Singapore
| | - Jilei Liu
- College of Materials Science and Engineering; Hunan University; Changsha 410082 China
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Self-supporting Co 3O 4/Graphene Hybrid Films as Binder-free Anode Materials for Lithium Ion Batteries. Sci Rep 2018; 8:3182. [PMID: 29453375 PMCID: PMC5816628 DOI: 10.1038/s41598-018-21436-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 02/05/2018] [Indexed: 12/05/2022] Open
Abstract
A self-supporting Co3O4/graphene hybrid film has been constructed via vacuum filtration of Co(OH)2 nanosheet and graphene, followed by a two-step thermal treatment. Within the hybrid film, Co3O4 nanoparticles with size of 40~60 nm uniformly in-situ grew on the surface of graphene, forming a novel porous and interleaved structure with strong interactions between Co3O4 nanoparticles and graphene. Such fascinating microstructures can greatly facilitate interfacial electron transportation and accommodate the volume changes upon Li ions insertion and extraction. Consequently, the binder-less hybrid film demonstrated extremely high reversible capacity (1287.7 mAh g−1 at 0.2 A g−1), excellent cycling stability and rate capability (1110 and 800 mAh g−1 at 0.5 and 1.0 A g−1, respectively).
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Cho DW, Jeong KH, Kim S, Tsang DCW, Ok YS, Song H. Synthesis of cobalt-impregnated carbon composite derived from a renewable resource: Characterization and catalytic performance evaluation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 612:103-110. [PMID: 28846901 DOI: 10.1016/j.scitotenv.2017.08.187] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 08/16/2017] [Accepted: 08/17/2017] [Indexed: 06/07/2023]
Abstract
A novel nitrogen-doped biochar embedded with cobalt (Co-NB) was fabricated via pyrolysis of glucose pretreated with melamine (N donor) and Co(II). The Co-NB showed high catalytic capability by converting p-nitrophenol (PNP) into p-aminophenol (PAP) by NaBH4. The analyses of FE-SEM, TEM, BET, XRD, Raman, and X-ray photoelectron spectroscopy XPS of the Co-NB showed hierarchical porous structure (BET 326.5m2g-1 and pore volume: 0.2403cm3g-1) with well-dispersed Co nanoparticles (20-60nm) on the N-doped graphitic biochar surface. The Co-NB showed higher PNP reduction capability compared to the Co-biochar without N-doping, achieving 94.3% removal within 4min at 0.24gL-1 catalyst dose and initial concentration of 0.35mM PNP. Further conversion experiments under varying environmental conditions (e.g., NaBH4 concentration (7.5-30mM), biochar dosage (0.12-1.0gL-1), initial PNP concentration (0.08-0.17mM)) were conducted in batch mode. The reusability of Co-NB was validated by the repetitive conversion experiments (5cycles). The overall results demonstrated biochar potential as catalysts for environmental applications if properly designed.
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Affiliation(s)
- Dong-Wan Cho
- Department of Environment and Energy, Sejong University, Seoul 05006, Republic of Korea
| | - Kwang-Hwa Jeong
- Livestock Air Quality Lab, Animal Environment Division, National Institute of Animal Science, 1500 Kongjwipatjwi-ro, Iseo-myeon, Wanju-gun, Jeollabuk-do 55365, Republic of Korea
| | - Sohyun Kim
- Department of Environment and Energy, Sejong University, Seoul 05006, Republic of Korea
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Yong Sik Ok
- Korea Biochar Research Center, School of Natural Resources and Environmental Science, Kangwon National University, Chuncheon 24341, Republic of Korea; O-Jeong Eco-Resilience Institute (OJERI), Division of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea
| | - Hocheol Song
- Department of Environment and Energy, Sejong University, Seoul 05006, Republic of Korea.
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Niu Q, Guo J, Tang Y, Guo X, Nie J, Ma G. Sandwich-type Bimetal-Organic Frameworks/Graphene Oxide Derived Porous Nanosheets doped Fe/Co-N Active Sites for Oxygen Reduction Reaction. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.09.125] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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