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NiMn‐Based Bimetal–Organic Framework Nanosheets Supported on Multi‐Channel Carbon Fibers for Efficient Oxygen Electrocatalysis
Author(s) -
Cheng Weiren,
Lu Xue Feng,
Luan Deyan,
Lou Xiong Wen David
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202008129
Subject(s) - electrocatalyst , bifunctional , bimetal , oxygen evolution , materials science , x ray absorption fine structure , chemical engineering , catalysis , carbon fibers , nanotechnology , chemistry , electrode , electrochemistry , spectroscopy , metallurgy , composite number , composite material , organic chemistry , physics , quantum mechanics , engineering
Developing noble‐metal‐free bifunctional oxygen electrocatalysts is of great significance for energy conversion and storage systems. Herein, we have developed a transformation method for growing NiMn‐based bimetal–organic framework (NiMn‐MOF) nanosheets on multi‐channel carbon fibers (MCCF) as a bifunctional oxygen electrocatalyst. Owing to the desired components and architecture, the MCCF/NiMn‐MOFs manifest comparable electrocatalytic performance towards oxygen reduction reaction (ORR) with the commercial Pt/C electrocatalyst and superior performance towards oxygen evolution reaction (OER) to the benchmark RuO 2 electrocatalyst. X‐ray absorption fine structure (XAFS) spectroscopy and density functional theory (DFT) calculations reveal that the strong synergetic effect of adjacent Ni and Mn nodes within MCCF/NiMn‐MOFs effectively promotes the thermodynamic formation of key *O and *OOH intermediates over active NiO 6 centers towards fast ORR and OER kinetics.