Metal-Organic Framework-Derived Graphene Mesh: A Robust Scaffold for Highly Exposed Fe-N4Active Sites toward an Excellent Oxygen Reduction Catalyst in Acid Media

Jingjing Li, Wei Xia*, Jing Tang, Yong Gao, Cheng Jiang, Yining Jia, Tao Chen, Zhufeng Hou, Ruijuan Qi, Dong Jiang, Toru Asahi, Xingtao Xu, Tao Wang, Jianping He, Yusuke Yamauchi

*この研究の対応する著者

研究成果: Article査読

2 被引用数 (Scopus)

抄録

This study demonstrates a special ultrathin N-doped graphene nanomesh (NGM) as a robust scaffold for highly exposed Fe-N4active sites. Significantly, the pore sizes of the NGM can be elaborately regulated by adjusting the thermal exfoliation conditions to simultaneously disperse and anchor Fe-N4moieties, ultimately leading to highly loaded Fe single-atom catalysts (SA-Fe-NGM) and a highly exposed morphology. The SA-Fe-NGM is found to deliver a superior oxygen reduction reaction (ORR) activity in acidic media (half-wave potential = 0.83 V vs RHE) and a high power density of 634 mW cm-2in the H2/O2fuel cell test. First-principles calculations further elucidate the possible catalytic mechanism for ORR based on the identified Fe-N4active sites and the pore size distribution analysis. This work provides a novel strategy for constructing highly exposed transition metals and nitrogen co-doped carbon materials (M-N-C) catalysts for extended electrocatalytic and energy storage applications.

本文言語English
ページ(範囲)9280-9291
ページ数12
ジャーナルJournal of the American Chemical Society
144
21
DOI
出版ステータスPublished - 2022 6月 1

ASJC Scopus subject areas

  • 触媒
  • 化学 (全般)
  • 生化学
  • コロイド化学および表面化学

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