单线态氧
化学
离解(化学)
光化学
单重态
氧气
活性氧
吸附
活性氧
钴
无机化学
物理化学
激发态
有机化学
物理
核物理学
生物化学
作者
Xueyue Mi,Pengfei Wang,Shizhe Xu,Lina Su,Hui Zhong,Haitao Wang,Yang Li,Sihui Zhan
标识
DOI:10.1002/ange.202014472
摘要
Abstract Single‐atom CoN 4 active sites have demonstrated excellent efficiency in peroxymonosulfate activation. However, the identification of CoN 4 active sites and the detailed singlet oxygen generation mechanism in peroxymonosulfate activation remains ambiguous. We demonstrate a strategy to regulate the generation of reactive oxygen species by atomically dispersed cobalt anchored on nitrogen‐doped carbon. As indicated by experiment and DFT calculations, CoN 2+2 was the active site and singlet oxygen was the predominant reactive oxygen species with a proportion of 98.89 %. Spontaneous dissociation of adsorbed peroxymonosulfate on the CoN 2+2 active sites was energetically unfavorable because of the weakly positive Co atoms and CoN 2+2 coordination, which directed PMS oxidation by a non‐radical pathway and with simultaneous singlet oxygen generation. The generated singlet oxygen degraded several organic pollutants with high efficiency across a broad pH range.
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