Abstract
It is highly desired but remains a great challenge to develop nonprecious metal single-atom catalysts to supersede the Pt-based material for oxygen reduction reaction (ORR). Herein, we report a porous nitrogen-doped carbon matrix catalyst with 3.5 wt % single Fe atoms (Fe SAs/N-C) through a versatile molecules-confined pyrolysis strategy. In 0.1 M KOH condition, the Fe SAs/N-C catalyst possesses a half-wave potential of 0.91 V vs RHE. In a more challenging acidic solution, Fe SAs/N-C catalyst also offers good ORR activity, comparable with the commercial Pt/C. Impressively, Fe SAs/N-C shows extremely high stability both in alkaline and acidic media. In addition, this Fe SAs/N-C-derived Zn-air battery and proton exchange membrane fuel cells (PEMFCs) exhibit high performance. This work opens an avenue for designing and preparing single-atom catalysts.
| Original language | English |
|---|---|
| Pages (from-to) | 2158-2163 |
| Number of pages | 6 |
| Journal | ACS Catalysis |
| Volume | 9 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Mar 2019 |
Keywords
- Zn-air battery
- electrocatalysis
- fuel cells
- oxygen reduction reaction
- porous carbons
- single-atom Fe