Construction of Highly Active Metal‐Containing Nanoparticles and FeCo‐N 4 Composite Sites for the Acidic Oxygen Reduction Reaction

Abstract Metal‐containing nanoparticles (M‐NPs) in metal/nitrogen‐doped carbon (M‐N‐C) catalysts have been considered hostile to the acidic oxygen reduction reaction (ORR). The relation between M‐NPs and the active sites of metal coordinated with nitrogen (MN x ) is hard to establish in acid medium...

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Bibliographic Details
Published in:Angewandte Chemie 2020-12, Vol.132 (49), p.22160-22163
Main Authors: Yin, Shu‐Hu, Yang, Jian, Han, Yu, Li, Gen, Wan, Li‐Yang, Chen, You‐Hu, Chen, Chi, Qu, Xi‐Ming, Jiang, Yan‐Xia, Sun, Shi‐Gang
Format: Article
Language:English
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Summary:Abstract Metal‐containing nanoparticles (M‐NPs) in metal/nitrogen‐doped carbon (M‐N‐C) catalysts have been considered hostile to the acidic oxygen reduction reaction (ORR). The relation between M‐NPs and the active sites of metal coordinated with nitrogen (MN x ) is hard to establish in acid medium owing to the poor stability of M‐NPs. Herein, we develop a strategy to successfully construct a new FeCo‐N‐C catalyst containing highly active M‐NPs and MN 4 composite sites (M/FeCo‐SAs‐N‐C). Enhanced catalytic activity and stability of M/FeCo‐SAs‐N‐C is shown experimentally. Calculations reveal that there is a strong interaction between M‐NPs and FeN 4 sites, which can favor ORR by activating the O−O bond, thus facilitating a direct 4 e − process. Those findings firstly shed light on the highly active M‐NPs and FeN 4 composite sites for catalyzing acid oxygen reduction reaction, and the relevant reaction mechanism is suggested.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.202010013