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Single‐Atom Iron Boosts Electrochemiluminescence
Author(s) -
Gu Wenling,
Wang Hengjia,
Jiao Lei,
Wu Yu,
Chen Yuxin,
Hu Liuyong,
Gong Jingming,
Du Dan,
Zhu Chengzhou
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.201914643
Subject(s) - luminol , electrochemiluminescence , catalysis , trolox , chemiluminescence , chemistry , photochemistry , oxygen , reactive oxygen species , linear range , antioxidant , inorganic chemistry , detection limit , organic chemistry , antioxidant capacity , biochemistry , chromatography
The traditional luminol–H 2 O 2 electrochemiluminescence (ECL) sensing platform suffers from self‐decomposition of H 2 O 2 at room temperature, hampering its application for quantitative analysis. In this work, for the first time we employ iron single‐atom catalysts (Fe‐N‐C SACs) as an advanced co‐reactant accelerator to directly reduce the dissolved oxygen (O 2 ) to reactive oxygen species (ROS). Owing to the unique electronic structure and catalytic activity of Fe‐N‐C SACs, large amounts of ROS are efficiently produced, which then react with the luminol anion radical and significantly amplify the luminol ECL emission. Under the optimum conditions, a Fe‐N‐C SACs–luminol ECL sensor for antioxidant capacity measurement was developed with a good linear range from 0.8 μ m to 1.0 m m of Trolox.