Journal
CHEMCATCHEM
Volume 13, Issue 1, Pages 397-406Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.202001319
Keywords
Aluminum-air battery; Metal-free electrocatalyst; Oxygen reduction reaction; Surface treatment; Zinc-air battery
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Funding
- Shandong Provincial Key research and development plan, China [2017GGX40119]
- Shandong Provincial Natural Science Foundation, China [ZR2019MB033, ZR2015BM002]
- Program of the Qingdao Key Lab of solar energy utilization and energy storage technology [QDKLSE201602]
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The study demonstrates that simple surface treatment and modification of N, P dual-doped porous carbon can effectively enhance the catalytic performance of oxygen reduction reaction (ORR), leading to improved battery performance.
N, P dual-doped porous carbon with high specific surface area of similar to 2000 m(2) g(-1) was prepared via foaming-carbonization process. It was demonstrated that the simple surface treatment and modification can conveniently further improve the catalytic performance of oxygen reduction reaction (ORR). The results showed that chemisorbed phosphorus can promote the surface treatment of sodium borohydride (NaBH4). The modified novel sites, adsorbing water molecules of a semi-free state, promoted the offensive key steps of H2O molecules in ORR. After post-treatment, the limit current density increased from 5.0 to 6.1 mA cm(-2) with a decreased Tafel slope and the onset potential positively shifted. This surface-modified catalyst was applied to Zn-air battery and Al-air battery, and had exhibited good applicability and excellent performances. This work illustrates that the simple post-treatments can conveniently and effectively improve the ORR performance of metal-free carbon catalysts.
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