Miao, Qiyang; Chen, Zhaoxi; Li, Xuewen; Liu, Minghao; Liu, Guojuan; Yang, Xiubei; Guo, Zhuangyan; Yu, Chengbing; Xu, Qing; Zeng, Gaofeng

ACS CATALYSIS

2023, 13,

Miao, Qiyang; Chen, Zhaoxi; Li, Xuewen; Liu, Minghao; Liu, Guojuan; Yang, Xiubei; Guo, Zhuangyan; Yu, Chengbing; Xu, Qing; Zeng, Gaofeng

Dual-atomcatalysts (DACs) are getting extensive attention in electrocatalysisdue to their high metal-loading rate, tunable active centers, andelectron states. However, developing dual-metal sites coordinatingwith different atoms is still under explored. Herein, the highly activeFe(2)N(5)P sites supported by P-doped hollow carbonsare demonstrated to catalyze the oxygen reduction reaction (ORR).The hollow carbon template was constructed from the core-shelled covalentand metal-organic frameworks, which showed high surface areasand abundant N and P atoms for anchoring dual-Fe atoms. The Fe-2@P-HC has catalytic sites of Fe(2)N(5)Pwith a high Fe content of 1.8 wt %, which shows the high catalyticactivity and selectivity toward the ORR with a half-wave potentialof 0.89 or 0.75 V vs RHE under alkaline or acidic condition in the4e(-) pathway. The theoretical calculations revealthat the P atoms in the Fe2N5P sites facilitatethe OOH* formation and thus improve the activity. This work providesa strategy to design new catalytic sites from COFs.