Journal
ACS ENERGY LETTERS
Volume 6, Issue 10, Pages 3624-3633Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.1c01678
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Funding
- National Youth Top-notch Talent Support Program
- State Key Laboratory of Pulp and Paper Engineering Funds [2020C03]
- National Natural Science Foundation of China [31971614, 32071714, 21736003]
- Guangzhou Science and Technology Funds [201904010078, 202002030167]
- China Postdoctoral Science Foundation [2019T120725, 2019M652882, 2019M662924]
- Clean Vehicles, US-China Clean Energy Research Centre (CERC-CVC2) under US DOE EERE Vehicle Technologies Office
- DOE Office of Science [DE-AC02-06CH11357]
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This study achieved in situ formation of single-atom Fe-N-C catalysts on plate wood-based porous carbon through a facile Lewis acid pretreatment and carbonization process, improving the performance and durability of oxygen reduction reaction and oxygen evolution reaction. The Zn-air battery using this catalyst exhibited high power density and long-term stability.
Low-cost and efficient oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) bifunctional electrocatalysts are vital for the applications of rechargeable Zn-air batteries (ZABs). Given the high catalytic activity of single-atom catalysts (SACs), preparing SACs on a large scale for ZABs is desirable but remains challenging. Herein, in situ formation of single-atom Fe-N-C catalysts on plate wood-based porous carbon is achieved via a facile Lewis acid pretreatment and carbonization process. Lewis acid FeCl3 pretreatment on the cell wall of wood not only produces abundant microchannels but also successfully introduces atomically dispersed Fe-N active species into the hierarchical structure. Such uniformly dispersive SACs on the hierarchical structure enhance the ORR/OER performance and durability. A ZAB using the catalyst in the cathode shows a high power density (70.2 mW cm(-2), at quasi solid state) and long-term stability. This work provides a new path for the large-scale preparation of high-performance SACs.
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