NiMn‐Based Bimetal–Organic Framework Nanosheets Supported on Multi‐Channel Carbon Fibers for Efficient Oxygen Electrocatalysis | Zendy

Cheng Weiren | Zendy; Lu Xue Feng | Zendy; Luan Deyan | Zendy; Lou Xiong Wen (David) | Zendy

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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

Language(s) - English

Resource type - Journals

eISSN - 1521-3757

pISSN - 0044-8249

DOI - 10.1002/ange.202008129

Subject(s) - electrocatalyst , bifunctional , bimetal , oxygen evolution , materials science , x ray absorption fine structure , chemical engineering , carbon fibers , metal organic framework , oxygen , chemistry , catalysis , nanotechnology , electrode , electrochemistry , spectroscopy , adsorption , composite number , metallurgy , composite material , organic chemistry , physics , quantum mechanics , engineering

Abstract 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.

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