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Atomic Fe-Zn dual-metal sites for high-efficiency pH-universal oxygen reduction catalysis

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Abstract

An effective electrocatalyst being highly active in all pH range for oxygen reduction reaction (ORR) is crucial for energy conversion and storage devices. However, most of the high-efficiency ORR catalysis was reported in alkaline conditions. Herein, we demonstrated the preparation of atomically dispersed Fe-Zn pairs anchored on porous N-doped carbon frameworks (Fe-Zn-SA/NC), which works efficiently as ORR catalyst in the whole pH range. It achieves high half-wave potentials of 0.78, 0.85 and 0.72 V in 0.1 M HClO4, 0.1 M KOH and 0.1 M phosphate buffer saline (PBS) solutions, respectively, as well as respectable stability. The performances are even comparable to Pt/C. Furthermore, when assembled into a Zn-air battery, the high power density of 167.2 mWcm−2 and 120 h durability reveal the feasibility of Fe-Zn-SA/NC in real energy-related devices. Theoretical calculations demonstrate that the superior catalytic activity of Fe-Zn-SA/NC can be contributed to the lower energy barriers of ORR at the Fe-Zn-N6 centers. This work demonstrates the potential of Fe-Zn pairs as alternatives to the Pt catalysts for efficient catalytic ORR and provides new insights of dual-atom catalysts for other energy conversion related catalytic reactions.

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Acknowledgements

This work was financially supported by National Key R&D Program of China (No. 2017YFA0700104), the National Natural Science Foundation of China (Nos. 22075211, 21601136, 51971157, 51761165012, and 62005173), Project funded by China Postdoctoral Science Foundation (No. 2020TQ0201), Tian** Science Fund for Distinguished Young Scholars (No. 19JCJQJC61800). The authors also acknowledge National Supercomputing Center in Shenzhen for providing the computational resources and materials studio (version 7.0, DMol3).

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  1. Jie Xu and Shuhua Lai contributed equally to this work.

Authors and Affiliations

  1. Institute for New Energy Materials & Low-Carbon Technologies and Tian** Key Lab of Photoelectric Materials & Devices, School of Materials Science and Engineering, Tian** University of Technology, Tian**, 300384, China

    Jie Xu, Shuhua Lai, Defeng Qi, Min Hu, **anyun Peng, Wei Liu, Heng Xu, Fan Li, Chao Li, Jia He, Yuan Qiu, Jun Luo & **jun Liu

  2. College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China

    Yifan Liu

  3. Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, 650504, China

    Guangzhi Hu

  4. School of Materials Science and Engineering, **’an University of Technology, **’an, 710048, China

    Longchao Zhuo

  5. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China

    Jiaqiang Sun

  6. College of Chemistry, Zhengzhou University, Zhengzhou, 450000, China

    Shusheng Zhang

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  1. Jie Xu
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Correspondence to Yifan Liu, Jia He or **jun Liu.

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Xu, J., Lai, S., Qi, D. et al. Atomic Fe-Zn dual-metal sites for high-efficiency pH-universal oxygen reduction catalysis. Nano Res. 14, 1374–1381 (2021). https://doi.org/10.1007/s12274-020-3186-x

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