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发布时间：2019-11-07

论文类型：期刊论文

发表时间：2018-09-01

发表刊物：ACS NANO

收录刊物：SCIE、PubMed

卷号：12

期号：9

页面范围：9441-9450

ISSN号：1936-0851

关键字：ultra-small clusters; single atoms; FeNx/g-C3N4; high-density; AOPs

摘要：Ultra-small metal clusters have attracted great attention owing to their superior catalytic performance and extensive application in heterogeneous catalysis. However, the synthesis of high-density metal clusters is very challenging due to their facile aggregation. Herein, one-step pyrolysis was used to synthesize ultra-small clusters and single-atom Fe sites embedded in graphitic carbon nitride with high density (iron loading up to 18.2 wt %), evidenced by high-angle annular dark field-scanning transmission electron microscopy, X-ray absorption spectroscopy, X-ray photoelectron spectroscopy, and Fe-57 Mossbauer spectroscopy. The catalysts exhibit enhanced activity and stability in degrading various organic samples in advanced oxidation processes. The drastically increased metal site density and stability provide useful insights into the design and synthesis of cluster catalysts for practical application in catalytic oxidation reactions.