Atomically dispersed Fe/Co dual site electrocatalysts derived from covalent triazine frameworks for boosting oxygen reduction. Issue 11 (28th February 2023)

• Record Type: Journal Article
• Authors: Dun, Rongmin; He, Xiang; Huang, Jian; Wang, Wei; Yiwei liu, ; Li, Linghao; Lu, Bowen; Hua, Zile; Shi, Jianlin
• Is Part Of: Journal of materials chemistry. Volume 11:Issue 11(2023)
• Page Start: 5902
• Page End: 5909
• Publication Date: 2023-02-28
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d3ta00307h
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : The Fe/Co binary metal single-atom catalysts derived from a porous covalent triazine framework exhibit excellent oxygen reduction reactions. Abstract : Single-atom catalysts (SACs), especially transition metal–nitrogen–carbon materials, show high catalytic activity for the oxygen reduction reaction (ORR). Herein, we successfully construct covalent triazine framework (CTF) derived Fe/Co binary metallic SACs by a sequential chemical-doping and complexing adsorption strategy. The obtained atomically dispersed catalyst exhibits an extraordinary ORR performance featuring a half-wave potential of 0.922 V. Meanwhile, the synthesized catalyst shows excellent stability and methanol resistance in both acidic and alkaline media. We further applied the catalyst to Zn–air batteries, showing excellent power density and stability after long-term charge/discharge durability tests. The high ORR activity of the catalyst may result from the synergistic effect of dual metal sites, the high specific surface area and the porous structure. Besides, the doping of Co species provides more defects, which is conducive to the subsequent generation of Fe–N X species. This work provides valuable insights for the preparation of non-precious metal-based ORR catalysts.