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Subnanometer Iron Clusters Confined in Porous Carbon Matrix for Highly Efficient Zinc–Air Batteries

Abstract

Metal coordinates in molecular level are crucial for stabilizing an appropriate electronic configuration for the high-efficiency oxygen reduction reaction (ORR) electrocatalysts. In this work, an excellent platform to realize the decoration of Fe coordinates in subnanometer scale into the nitrogen-doped carbon networks (designated as Fe-Fe©NC) is provided. Results of X-ray absorption spectroscopy investigation confirm the precise configuration of Fe coordinates with Fe-Fe and Fe-N coordinations in molecular level. The newly developed Fe-Fe©NC exhibits superior ORR performance, low discharge–charge voltage gap and a long cycle life in Zn–air batteries. Density functional theory calculation reveals the Fe-Fe coordination in the Fe subclusters favors the 4e- transfer pathway and thus achieves highly active catalytic performance. This work reveals that iron clusters in subnanometer scale provide an optimized electronic structure for the enhanced ORR activity.

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Publication details

The article was received on 01 Aug 2019, accepted on 08 Oct 2019 and first published on 08 Oct 2019


Article type: Communication
DOI: 10.1039/C9NH00510B
Nanoscale Horiz., 2019, Accepted Manuscript

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    Subnanometer Iron Clusters Confined in Porous Carbon Matrix for Highly Efficient Zinc–Air Batteries

    X. Wu, J. Dong, M. Qiu, Y. Li, Y. Zhang, H. zhang and J. Zhang, Nanoscale Horiz., 2019, Accepted Manuscript , DOI: 10.1039/C9NH00510B

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