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Issue 43, 2017, Issue in Progress
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Oxygen-vacancy-promoted catalytic wet air oxidation of phenol from MnOx–CeO2

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Abstract

Catalytic oxidation can be effectively promoted by the presence of oxygen vacancies on the catalyst surface. In this study, the effect of oxygen vacancies on the catalytic wet air oxidation (CWAO) of phenol was investigated with CeO2 and MnOx–CeO2 as catalysts. CeO2 and MnOx–CeO2 catalysts with different amounts of oxygen vacancies were obtained via hydrothermal methods and applied for the CWAO of phenol. It was found that CeO2 and MnOx–CeO2 nanorods were much more active than the cubic nanorods. The physicochemical properties of the samples were characterized by TEM, XRD, BET, XPS, and H2-TPR techniques. The results revealed that the presence of oxygen vacancies in CeO2 and MnOx–CeO2 catalysts could increase the oxidizing ability of the catalysts surface. The addition of Mn could greatly improve the adsorption ability of CeO2 and more efficiently oxidize phenol and its intermediates. The synergy between Mn and Ce could further improve the catalyst redox properties and produce a larger amount of active oxygen species, which is the reason why MnOx–CeO2 nanorods are the most active catalysts among the catalysts investigated in this study.

Graphical abstract: Oxygen-vacancy-promoted catalytic wet air oxidation of phenol from MnOx–CeO2

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Publication details

The article was received on 09 Apr 2017, accepted on 08 May 2017 and first published on 22 May 2017


Article type: Paper
DOI: 10.1039/C7RA04037G
Citation: RSC Adv., 2017,7, 27079-27088
  • Open access: Creative Commons BY-NC license
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    Oxygen-vacancy-promoted catalytic wet air oxidation of phenol from MnOx–CeO2

    C. Ma, Y. Wen, Q. Yue, A. Li, J. Fu, N. Zhang, H. Gai, J. Zheng and B. H. Chen, RSC Adv., 2017, 7, 27079
    DOI: 10.1039/C7RA04037G

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