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Single atomic cobalt electrocatalyst for efficient oxygen reduction reaction
- Source :
- eScience, Vol 2, Iss 4, Pp 399-404 (2022)
- Publication Year :
- 2022
- Publisher :
- KeAi Communications Co. Ltd., 2022.
-
Abstract
- Robust oxygen reduction reaction (ORR) catalysts are essential for energy storage and conversion devices, but their development remains challenging. Herein, we design a single-atom catalyst featuring isolated Co anchored on nitrogen-doped carbon (Co-SAC/NC) via a highly efficient “plasma-bombing” strategy. With a high loading (up to 2.5 wt%), the well-dispersed single Co atoms in Co-SAC/NC give it robust ORR performance in an alkaline medium. It also demonstrates excellent battery performance when implemented as the air-cathode catalyst in a zinc-air battery (ZAB). Theoretical calculations reveal that the Co–N4 moiety experiences an “extraction/recovery” structural evolution during the ORR process, and the reaction's rate-determining step is the formation of OOH∗ (reaction intermediate). This work provides a new strategy for designing robust ORR catalysts for high-performance ZABs and other energy-conversion devices.
Details
- Language :
- English
- ISSN :
- 26671417
- Volume :
- 2
- Issue :
- 4
- Database :
- Directory of Open Access Journals
- Journal :
- eScience
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.32728523b5974ed087043f1fbd193065
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.esci.2022.05.004