Abstract
A series of Ce-Cu-SSZ-13 catalysts were synthesized by the ion exchange method based on the Cu-SSZ-13 prepared via a one-pot method and investigated for the selective catalytic reduction by NH3. Compared with Cu-SSZ-13, the catalytic activity and sulfur resistance of Ce-Cu-SSZ-13 were enhanced by modifying with cerium. XRD, N2-BET, MP-AES, XPS, H2-TPR and in situ DRIFTS were carried out to characterize the catalysts. XPS results suggested that more active sites on the surface of Ce-Cu-SSZ-13 catalysts. H2-TPR showed that the redox capacity of the Cu-SSZ-13 catalyst was enhanced after doping with Ce. In situ DRIFTS results demonstrated that the synergistic effect existing between copper and cerium species enhanced the adsorption performance of NH3 and NO + O2 on the catalyst surface. All of the above factors played important roles for achieving the high NH3-SCR performance.
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This work was supported by the National Natural Science Foundation of China (No. 21606162).
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Li, X., Feng, J., Xu, Z. et al. Cerium modification for improving the performance of Cu-SSZ-13 in selective catalytic reduction of NO by NH3. Reac Kinet Mech Cat 128, 163–174 (2019). https://doi.org/10.1007/s11144-019-01621-w
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DOI: https://doi.org/10.1007/s11144-019-01621-w