Citation: Guoxin Zhang, Shaoqing Feng, Kairen Cheng, Xingxing Li, Jiangxia Tian, Kai Chen, Huile Jin, Shun Wang. Multivariate MOF-derived single-atom catalyst with enhanced site accessibility as a bifunctional electrocatalyst for zinc-air batteries[J]. Chinese Chemical Letters, ;2026, 37(6): 111918. doi: 10.1016/j.cclet.2025.111918 shu

Multivariate MOF-derived single-atom catalyst with enhanced site accessibility as a bifunctional electrocatalyst for zinc-air batteries

Wenzhou Key Lab of Advanced Energy Storage and Conversion, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China

kaichen@wzu.edu.cn

huilejin@wzu.edu.cn

shunwang@wzu.edu.cn

Received Date: 26 July 2025
Revised Date: 18 September 2025
Accepted Date: 28 September 2025
Available Online: 29 September 2025

Figures(4)

High-performance bifunctional oxygen electrocatalysts are urgently required for rechargeable zinc-air batteries (ZABs) due to sluggish kinetics of oxygen reduction/evolution reactions (ORR/OER) at the air cathode. In this study, an iron single-atom catalyst (Fe-SAC, FeTCPP@UiO-66–800) is synthesized by direct pyrolysis of a metalloporphyrin-incorporated multivariate MOF. The spatial separation effect of the framework linkers endows Fe-SAC with hierarchical porosity, improved metal utilization efficiency, and enhanced site accessibility by suppressing the metal agglomeration during pyrolysis. Moreover, the possible formation of di- or tri-atomic iron sites facilitates the OER activity via the oxide pathway mechanism (OPM), contributing to the excellent bifunctional ORR/OER performance with a ΔE of 0.59 V. Both liquid and flexible ZAB assembled with FeTCPP@UiO-66–800 demonstrate enhanced activity, long-term durability, and anti-deformation ability (340.5 mW/cm² peak power density in liquid device). This study presents a novel strategy for preparing MOF-derived SACs with highly accessible single-atom sites, offering a promising route to high-performance energy conversion devices.
- Multivariate MOF,
- Iron single-atom catalyst,
- Site accessibility,
- Bifunctional electrocatalyst,
- Zinc-air battery
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