Strategic modulation of CoFe sites for advanced bifunctional oxygen electrocatalyst

Juhong Zhou Hui Zhao Ping Han Ziyue Wang Yan Zhang Xiaoxia Mao Konglin Wu Shengjue Deng Wenxiang He Binbin Jiang

引用本文: 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
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

摘要: 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.

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