Abstract
In this study, it was found that the CeVO4-CeO2 nanocomposite possessed remarkably selective catalytic reduction (SCR) performance and wider active temperature scope. And, the promotion principle was explored based on BET, XRD, XPS, H2-temperature-programmed reduction, NH3-temperature-programmed desorption, and in situ diffuse reflectance infrared Fourier transform (DRIFT) techniques. The characterization outcomes manifested that the CeVO4-CeO2 nanocomposite could inhibit its crystallinity and enhance the concentrations of chemisorbed oxygen species and Ce3+, which was advantageous to the SCR process. Moreover, the in situ DRIFT technique manifested that the NH3-SCR reaction over Ce0.75V0.25Oy was enhanced effectively through the mechanism of L-H.
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This work was financially supported by the National Key R&D Program of China (2018YFB0605002).
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Duan, Cp., Guo, Rt., Wu, Gl. et al. Selective catalytic reduction of NOx by NH3 over CeVO4-CeO2 nanocomposite. Environ Sci Pollut Res 27, 22818–22828 (2020). https://doi.org/10.1007/s11356-020-08875-1
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DOI: https://doi.org/10.1007/s11356-020-08875-1