Interfacial assembly of binary atomic metal-Nx sites for high-performance energy devices

Zhe Jiang, Xuerui Liu, Xiao-Zhi Liu, Shuang Huang, Ying Liu, Ze-Cheng Yao, Yun Zhang, Qing-Hua Zhang, Lin Gu, Li-Rong Zheng, Li Li, Jianan Zhang, Youjun Fan (), Tang Tang (), Zhongbin Zhuang and Jin-Song Hu ()
Additional contact information
Zhe Jiang: Chinese Academy of Sciences
Xuerui Liu: Beijing University of Chemical Technology
Xiao-Zhi Liu: Chinese Academy of Sciences
Shuang Huang: Chongqing University
Ying Liu: Chinese Academy of Sciences
Ze-Cheng Yao: Chinese Academy of Sciences
Yun Zhang: Chinese Academy of Sciences
Qing-Hua Zhang: Chinese Academy of Sciences
Lin Gu: Chinese Academy of Sciences
Li-Rong Zheng: Chinese Academy of Sciences
Li Li: Chongqing University
Jianan Zhang: Zhengzhou University
Youjun Fan: Guangxi Normal University
Tang Tang: Chinese Academy of Sciences
Zhongbin Zhuang: Beijing University of Chemical Technology
Jin-Song Hu: Chinese Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-12

Abstract: Abstract Anion-exchange membrane fuel cells and Zn–air batteries based on non-Pt group metal catalysts typically suffer from sluggish cathodic oxygen reduction. Designing advanced catalyst architectures to improve the catalyst’s oxygen reduction activity and boosting the accessible site density by increasing metal loading and site utilization are potential ways to achieve high device performances. Herein, we report an interfacial assembly strategy to achieve binary single-atomic Fe/Co-Nx with high mass loadings through constructing a nanocage structure and concentrating high-density accessible binary single-atomic Fe/Co–Nx sites in a porous shell. The prepared FeCo-NCH features metal loading with a single-atomic distribution as high as 7.9 wt% and an accessible site density of around 7.6 × 1019 sites g−1, surpassing most reported M–Nx catalysts. In anion exchange membrane fuel cells and zinc–air batteries, the FeCo-NCH material delivers peak power densities of 569.0 or 414.5 mW cm−2, 3.4 or 2.8 times higher than control devices assembled with FeCo-NC. These results suggest that the present strategy for promoting catalytic site utilization offers new possibilities for exploring efficient low-cost electrocatalysts to boost the performance of various energy devices.

Date: 2023
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DOI: 10.1038/s41467-023-37529-2

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