Constructing Asymmetric Fe–Nb Diatomic Sites to Enhance ORR Activity and Durability

Sui, Rui; Liu, Bo; Chen, Chang; Chen, Chang; Tan, Xin; He, Chang; Xin, Dongyue; Chen, Bowen; Xu, Zhiyuan; Li, Jiazhan; Chen, Wenxing; Zhuang, Zhongbin; Wang, Zhen‐Bo; Chen, Chen; Chen, Chen

doi:10.1021/jacs.4c09642

articleJournal of the American Chemical SocietySep 13, 2024Closed access

Constructing Asymmetric Fe–Nb Diatomic Sites to Enhance ORR Activity and Durability

RSRui Sui BLBo Liu CCChang Chen CCChang Chen XTXin Tan

Tsinghua University · Harbin Institute of Technology · +2 more institutions

PubMed

Indexed incrossrefpubmed

Abstract

Iron–nitrogen–carbon (Fe–N–C) materials have been identified as a promising class of platinum (Pt)-free catalysts for the oxygen reduction reaction (ORR). However, the dissolution and oxidation of Fe atoms severely restrict their long-term stability and performance. Modulating the active microstructure of Fe–N–C is a feasible strategy to enhance the ORR activity and stability. Compared with common 3d transition metals (Co, Ni, etc.), the 4d transition metal atom Nb has fewer d electrons and more unoccupied orbitals, which could potentially forge a more robust interaction with the Fe site to optimize the binding energy of the oxygen-containing intermediates while maintaining stability. Herein, an asymmetric…

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Topics & keywords

Topics

Keywords

Chemistry
Diatomic molecule
Durability
Computational chemistry
Molecule
Organic chemistry
Composite material

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