Volume 60, Issue 52 pp. 27324-27329
Communication

Metal-Triazolate-Framework-Derived FeN4Cl1 Single-Atom Catalysts with Hierarchical Porosity for the Oxygen Reduction Reaction

Linyu Hu

Linyu Hu

Key Laboratory of Cluster Science Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Technology Research Institute (Jinan), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081 P. R. China

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Chunlong Dai

Chunlong Dai

Key Laboratory of Cluster Science Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Technology Research Institute (Jinan), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081 P. R. China

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Liwei Chen

Liwei Chen

Key Laboratory of Cluster Science Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Technology Research Institute (Jinan), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081 P. R. China

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Yuhao Zhu

Yuhao Zhu

Key Laboratory of Cluster Science Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Technology Research Institute (Jinan), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081 P. R. China

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Yuchen Hao

Yuchen Hao

Key Laboratory of Cluster Science Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Technology Research Institute (Jinan), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081 P. R. China

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Dr. Qinghua Zhang

Dr. Qinghua Zhang

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing, 100081 P. R. China

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Prof. Dr. Lin Gu

Prof. Dr. Lin Gu

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing, 100081 P. R. China

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Prof. Dr. Xiao Feng

Prof. Dr. Xiao Feng

Key Laboratory of Cluster Science Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Technology Research Institute (Jinan), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081 P. R. China

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Shuai Yuan

Shuai Yuan

Key Laboratory of Cluster Science Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Technology Research Institute (Jinan), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081 P. R. China

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Dr. Lu Wang

Corresponding Author

Dr. Lu Wang

Key Laboratory of Cluster Science Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Technology Research Institute (Jinan), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081 P. R. China

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Prof. Dr. Bo Wang

Corresponding Author

Prof. Dr. Bo Wang

Key Laboratory of Cluster Science Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Technology Research Institute (Jinan), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081 P. R. China

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First published: 26 October 2021
Citations: 248

Graphical Abstract

A Zn/Fe-bimetallic metal-triazolate framework (MET) modified with 4,5-dichloroimidazole (dcIm) was used to prepare the Fe single-atom catalyst FeN4Cl1/NC. In the oxygen reduction reaction (ORR), the catalyst offers fast mass transfer and high catalytic activity because of abundant mesopores (pore:volume ratio 0.92), a high Fe loading (2.78 wt %), and defined FeN4Cl1 sites with a distinct electronic structure.

Abstract

The construction of single-atom catalysts (SACs) with high single atom densities, favorable electronic structures and fast mass transfer is highly desired. We have utilized metal-triazolate (MET) frameworks, a subclass of metal–organic frameworks (MOFs) with high N content, as precursors since they can enhance the density and regulate the electronic structure of single-atom sites, as well as generate abundant mesopores simultaneously. Fe single atoms dispersed in a hierarchically porous N-doped carbon matrix with high metal content (2.78 wt %) and a FeN4Cl1 configuration (FeN4Cl1/NC), as well as mesopores with a pore:volume ratio of 0.92, were obtained via the pyrolysis of a Zn/Fe-bimetallic MET modified with 4,5-dichloroimidazole. FeN4Cl1/NC exhibits excellent oxygen reduction reaction (ORR) activity in both alkaline and acidic electrolytes. Density functional theory calculations confirm that Cl can optimize the adsorption free energy of Fe sites to *OH, thereby promoting the ORR process. The catalyst demonstrates great potential in zinc-air batteries. This strategy selects, designs, and adjusts MOFs as precursors for high-performance SACs.

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