Modulating the Electrocatalytic Activity of N-doped Carbon Frameworks via Coupling with Dual Metals for Zn-Air Batteriesopen access
- Authors
- Park, Jung Hyun; Shin, Jae-Hoon; Ju, Jong-Min; Lee, Jun-Hyeong; Choi, Chanhee; So, Yoonhee; Lee, Hyunji; Kim, Jong-Ho
- Issue Date
- Apr-2022
- Publisher
- Springer | Korea Nano Technology Research Society
- Keywords
- Dual metal incorporation; N-doped carbon framework; Oxygen electrocatalyst; Oxygen reduction reaction; Oxygen-mediated solvothermal radical reaction; Zn–air battery
- Citation
- Nano Convergence, v.9, no.1, pp 1 - 10
- Pages
- 10
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- Nano Convergence
- Volume
- 9
- Number
- 1
- Start Page
- 1
- End Page
- 10
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/113544
- DOI
- 10.1186/s40580-022-00308-8
- ISSN
- 2196-5404
- Abstract
- N-Doped carbon electrocatalysts are a promising alternative to precious metal catalysts to promote oxygen reduction reaction (ORR). However, it remains a challenge to design the desired active sites on carbon skeletons in a controllable manner for ORR. Herein, we developed a facile approach based on oxygen-mediated solvothermal radical reaction (OSRR) for preparation of N-doped carbon electrocatalysts with a pre-designed active site and modulated catalytic activity for ORR. In the OSRR, 2-methylimidazole reacted with Co and Mn salts to form an active site precursor (MnCo-MIm) in N-methyl-2-pyrrolidone (NMP) at room temperature. Then, the reaction temperature increased to 140 °C under an oxygen atmosphere to generate NMP radicals, followed by their polymerization with the pre-formed MnCo-MIm to produce Mn-coupled Co nanoparticle-embedded N-doped carbon framework (MnCo-NCF). The MnCo-NCF showed uniform dispersion of nitrogen atoms and Mn-doped Co nanoparticles on the carbon skeleton with micropores and mesopores. The MnCo-NCF exhibited higher electrocatalytic activity for ORR than did a Co nanoparticle only-incorporated carbon framework due to the improved charge transfer from the Mn-doped Co nanoparticles to the carbon skeleton. In addition, the Zn–air battery assembled with MnCo-NCF had superior performance and durability to the battery using commercial Pt/C. This facile approach can be extended for designing carbon electrocatalysts with desired active sites to promote specific reactions. Graphical Abstract: [Figure not available: see fulltext.]. © 2022, The Author(s)
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