Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
49373 | Catalysis Communications | 2015 | 5 Pages |
•The intrinsic catalytic oxidation activity of CeOx@MnOx is higher than that of CeMnOx.•The core–shell structure may hinder the sinter and aggregation of nanoparticles.•The surface concentration of Mn4 + on CeOx@MnOx is much higher than that on CeMnOx.
The CeOx@MnOx catalyst with a core–shell structure was prepared and used for catalytic oxidation of NO. It was found that CeOx@MnOx catalyst showed higher intrinsic catalytic activity than CeMnOx catalyst prepared by citric acid method. Based on the characterization results of N2 adsorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), temperature-programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS), we may conclude that the excellent catalytic performance of CeOx@MnOx catalyst is related to its low crystallinity, good reducibility, and high concentrations of Mn4 + and active oxygen species.
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