Spin Regulation of Fe Single Site Induced by Adjacent Mg Site Achieving Excellent Oxygen Reduction Catalysis (IMAGE)
Caption
- The FeMg–N–C dual-atom catalyst demonstrates excellent oxygen reduction reaction (ORR) performance, achieving notably high half-wave potentials of 1.004 V in alkaline and 0.881 V in acidic media.
- Adjacent Mg sites induce the spin state transition of Fe from low spin to medium spin, optimizing the adsorption of *O2 and desorption of *OH, thereby accelerating the 4-electron ORR pathway.
- The catalyst enables outstanding practical performance in energy devices, delivering peak power densities of 530.1 mW cm−2 in Zn–air batteries and 1.06 W cm−2 in H2–O2 fuel cells.
Credit
Yuan Shi, Ziyi Zhang, Lei Bai, Dingding Li, Jingbo Shi, Zongye Yue, Tianyu Yuan, Jinbo Bai, Jintao Bai, Kunyue Leng*, Xiaolin Li*, Xuejing Wang*, Yunteng Qu*.
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CC BY-NC-ND