Abstract
The Co/N-doped carbon material, as an important electrocatalytic material, has been attracted intense interest in ORR and Zn-air battery. Here, we report an efficient Co@N-doped carbon catalyst (Co@N-C-1) obtained by pyrolysis of ZIF precursor with 2-aminobenzimidazole. The introduction of 2-aminobenzimidazole results in the formation of hierarchical meso/microporous structure of the as-prepared Co@N-C-1, effectively avoiding the aggregation of Co nanoparticles during pyrolysis and the higher N content, which contributes to enhance the ORR electrocatalytic activities. The obtained Co@N-C-1 exhibits remarkable ORR performance with a half-wave potential of 0.938 V vs RHE in alkaline media. As the air catalyst of zinc-air batteries, Co@N-C-1 displays 1.439 V of open-circuit voltage and 1413.3 Wh·kg-1 of energy density.
| Original language | English |
|---|---|
| Pages (from-to) | 11693-11701 |
| Number of pages | 9 |
| Journal | ACS applied materials & interfaces |
| Volume | 12 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 11 Mar 2020 |
Keywords
- 2-aminobenzimidazole
- Co@N-doped carbon
- ZIF precursor
- Zn-air battery
- oxygen reduction reaction (ORR)