Volume 17, Issue 40 2102425
Research Article

Simultaneously Engineering the Coordination Environment and Pore Architecture of Metal–Organic Framework-Derived Single-Atomic Iron Catalysts for Ultraefficient Oxygen Reduction

Feng Liu

Feng Liu

State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemical Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

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Lei Shi

Lei Shi

State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemical Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

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Shaofeng Song

Shaofeng Song

Hebei Key Laboratory of Functional Polymers, Institute of Polymer Science and Engineering, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130 China

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Kai Ge

Kai Ge

Hebei Key Laboratory of Functional Polymers, Institute of Polymer Science and Engineering, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130 China

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Xiaopeng Zhang

Xiaopeng Zhang

Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka, 819-0395 Japan

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Yingchun Guo

Corresponding Author

Yingchun Guo

Key Laboratory of Special Functional Materials for Ecological Environment and Information, Hebei University of Technology, Ministry of Education, Tianjin, 300130 China

E-mail: [email protected], [email protected], [email protected]

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Dong Liu

Corresponding Author

Dong Liu

State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemical Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 China

E-mail: [email protected], [email protected], [email protected]

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First published: 08 September 2021
Citations: 38

Abstract

Designing highly efficient and durable electrocatalysts that accelerate sluggish oxygen reduction reaction kinetics for fuel cells and metal–air batteries are highly desirable but challenging. Herein, a facile yet robust strategy is reported to rationally design single iron active centers synergized with local S atoms in metal–organic frameworks derived from hierarchically porous carbon nanorods (Fe/N,S-HC). The cooperative trithiocyanuric acid-based coating not only introduces S atoms that regulate the coordination environment of the active centers, but also facilitates the formation of a hierarchically porous structure. Benefiting from electronic modulation and architectural functionality, Fe/N,S-HC catalyst shows markedly enhanced ORR performance with a half-wave potential (E1/2) of 0.912 V and satisfactory long-term durability in alkaline medium, outperforming those of commercial Pt/C. Impressively, Fe/N,S-HC-based Zn–air battery also presents outstanding battery performance and long-term stability. Both electrochemical experimental and density functional theoretical (DFT) calculated results suggest that the FeN4 sites tailored with local S atoms are favorable for the adsorption/desorption of oxygen intermediate, resulting in lower activation energy barrier and ultraefficient oxygen reduction catalytic activity. This work provides an atomic-level combined with porous morphological-level insights into oxygen reduction catalytic property, promoting rational design and development of novel highly efficient single-atom catalysts for the renewable energy applications.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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