Modulating the electrocatalytic activity of N-doped carbon frameworks via coupling with dual metals for Zn–air batteries
- Title
- Modulating the electrocatalytic activity of N-doped carbon frameworks via coupling with dual metals for Zn–air batteries
- Author
- 김종호
- Keywords
- Dual metal incorporation; N-doped carbon framework; Oxygen electrocatalyst; Oxygen reduction reaction; Oxygen-mediated solvothermal radical reaction; Zn-air battery
- Issue Date
- 2022-04
- Publisher
- Springer | Korea Nano Technology Research Society
- Citation
- Nano Convergence, v. 9, NO. 1, article no. 17, Page. 1-10
- 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-Mlm) in N-methyl-2-pyrrolidone (NMP) at room temperature. Then, the reaction temperature increased to 140 degrees C under an oxygen atmosphere to generate NMP radicals, followed by their polymerization with the pre-formed MnCo-Mlm 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.
- URI
- https://nanoconvergencejournal.springeropen.com/articles/10.1186/s40580-022-00308-8https://repository.hanyang.ac.kr/handle/20.500.11754/175952
- ISSN
- 2196-5404
- DOI
- 10.1186/s40580-022-00308-8
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
- Files in This Item:
- 84884.pdfDownload
- Export
- RIS (EndNote)
- XLS (Excel)
- XML