| Autor: |
Cui, Pin, Tang, Ying, Yu, Jie, Yang, Zhen, Yang, Shouhua, Li, Boqin, Wang, Gang, Pang, Huan, Yu, Feng |
| Zdroj: |
Chinese Chemical Letters; 20240101, Issue: Preprints |
| Abstrakt: |
An Fe-doped bimetallic ZnFe–MOF precursor was prepared using a microchannel reactor, and carbonization was conducted to synthesize a bimetallic catalyst (ZnFe–NC). The fundamental reason for the efficient activity of the catalyst was determined through an in-depth analysis of its structural composition and close correlation with the oxygen reduction reaction (ORR). The ZnFe–NC catalyst maintains a stable truncated rhombohedral morphology and a rich microporous structure, exhibiting excellent ORR activity and long-term stability. The experimental results show that compared with the reversible hydrogen electrode, it has a high half-wave potential of 0.902 V (E1/2), retains 94% of activity after 35,000 s of stability testing, and exhibits significant methanol tolerance in alkaline media. Density functional theory calculations confirm the synergistic effect between the Zn and Fe sites. Furthermore, the results indicate that the interaction between ZnFe–N6coordination structures reduces the reaction energy barrier, thus enhancing intermediate adsorption during the ORR. |
| Databáze: |
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