Citation: Juhong Zhou, Hui Zhao, Ping Han, Ziyue Wang, Yan Zhang, Xiaoxia Mao, Konglin Wu, Shengjue Deng, Wenxiang He, Binbin Jiang. Strategic modulation of CoFe sites for advanced bifunctional oxygen electrocatalyst[J]. Chinese Journal of Structural Chemistry, ;2025, 44(1): 100470. doi: 10.1016/j.cjsc.2024.100470 shu

Strategic modulation of CoFe sites for advanced bifunctional oxygen electrocatalyst

An effective strategy of regulating active sites in bifunctional oxygen electrocatalysts is essentially desired, especially in rechargeable metal-air batteries (RZABs). Herein, a highly efficient electrocatalyst of CoFe alloys embedded in pyridinic nitrogen enriched N-doped carbon (CoFe/P-NC) is intelligently constructed by pyrolysis strategy. The high concentration of pyridinic nitrogen in CoFe/P-NC can significantly reprogram the redistribution of electron density of metal active sites, consequently optimizing the oxygen adsorption behavior. As expected, the pyridinic nitrogen guarantees CoFe/P-NC providing the low overpotential of the overall oxygen electrocatalytic process (ΔEORR-OER = 0.73 V vs RHE) and suppresses the benchmark electrocatalysts (Pt/C & RuO2). Assembled rechargeable Zn-air battery using CoFe/P-NC demonstrates a promising peak power density of 172.0 mW·cm-2, a high specific capacity of 805.0 mAh·g-1Zn and an excellent stability. This work proposes an interesting strategy for design of robust oxygen electrocatalysts for energy conversion and storage fields.
- Bifunctional oxygen electrocatalyst,
- Bimetallic alloys,
- Pyridinic nitrogen,
- Zn-air battery
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