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Type: Journal article
Title: Boosting Fenton-like reactions via single atom Fe catalysis
Author: Yin, Y.
Shi, L.
Li, W.
Li, X.
Wu, H.
Ao, Z.
Tian, W.
Liu, S.
Wang, S.
Sun, H.
Citation: Environmental Science and Technology (Washington), 2019; 53(19):11391-11400
Publisher: American Chemical Society
Issue Date: 2019
ISSN: 0013-936X
Statement of
Yu Yin, Lei Shi, Wenlang Li, Xuning Li, Hong Wu, Zhimin Ao, Wenjie Tian, Shaomin Liu, Shaobin Wang, and Hongqi Sun
Abstract: The maximization of the numbers of exposed active sites in supported metal catalysts is important to achieve high reaction activity. In this work, a simple strategy for anchoring single atom Fe on SBA-15 to expose utmost Fe active sites was proposed. Iron salts were introduced into the as-made SBA-15 containing the template and calcined for simultaneous decomposition of the iron precursor and the template, resulting in single atom Fe sites in the nanopores of SBA-15 catalysts (SAFe-SBA). X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), and extended X-ray absorption fine structure (EXAFS) imply the presence of single atom Fe sites. Furthermore, EXAFS analysis suggests the structure of one Fe center with four O atoms, and density functional theory calculations (DFT) simulate this structure. The catalytic performances of SAFe-SBA were evaluated in Fenton-like catalytic oxidation of p-hydroxybenzoic acid (HBA) and phenol. It was found that the single atom SAFe-SBA catalysts displayed superior catalytic activity to aggregated iron sites (AGFe-SBA) in both HBA and phenol degradation, demonstrating the advantage of SAFe-SBA in catalysis.
Keywords: Catalysis
Rights: © 2019 American Chemical Society
DOI: 10.1021/acs.est.9b03342
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