Geminal Cl-Bridged Dual-Fe-Atom Catalyst for Efficient and Stable Oxygen Reduction Reaction

Cui, Junjie; Zhang, Wenyao; Hou, Yangrui; Yang, Xiaojia; Gao, Yuhao; Zhang, Xudong; Fang, Chenchen; Yang, Yang; Li, Zhi; Liu, Bin; Zhu, Junwu

doi:10.1021/jacs.5c15456

articleJournal of the American Chemical SocietyJan 2, 2026Closed access

Geminal Cl-Bridged Dual-Fe-Atom Catalyst for Efficient and Stable Oxygen Reduction Reaction

JCJunjie Cui WZWenyao Zhang YHYangrui Hou XYXiaojia Yang YGYuhao Gao

Nanjing University of Science and Technology · University of Alberta · +1 more institution

PubMed

Indexed incrossrefpubmed

Abstract

Atomically dispersed iron–nitrogen–carbon (Fe–N–C) catalysts hold great promise for the oxygen reduction reaction (ORR), yet their structural instability under operational conditions restricts their practical application. In this study, we identify that electrochemical degradation of the Fe–N–C catalyst stems from a dynamic disparity between the Fe–N and Fe–O bonds during ORR, leading to pronounced Fe demetallization. Guided by this mechanistic insight, we synthesize a dual-Fe-atom catalyst featuring a well-defined N3–Fe–Cl–Fe–N3 structure. Combined theoretical and experimental results reveal that the bridging Cl atom induces charge redistribution and downshifts the Fe d-band center, thereby regulating the…

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Topics

Keywords

Catalysis
Overpotential
Electrochemistry
Redistribution (election)
Protonation
Redox
Cooperativity
Adsorption

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