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Enhanced Activity of Ceria Loaded Sb-V2O5/TiO2 Catalysts for NO Reduction with Ammonia

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Abstract

The effect of Ce-loading over Sb-V2O5/TiO2 catalysts was investigated for the removal of NOx by NH3. In order to understand the influence of Ce-loading over Sb-V2O5/TiO2, NH3-temperature programmed desorption, H2-temperature programmed reduction, X-ray photoelectron spectroscopy (XPS) and diffused reflectance infrared fourier transformed spectroscopy (DRIFTS) were carried out. The 10 % Ce-loaded Sb-V2O5/TiO2 catalyst exhibited superior activity than commercial V2O5–WO3–TiO2 under 6 % H2O and 800 ppm SO2. The XPS results indicated the presence of Ce3+ species. The amount of Brønsted acid sites significantly increased as a result of Ce-loading. The DRIFT spectrum of Sb-V2O5/TiO2 catalyst indicated a peak at 1,363 cm−1, which corresponded to intermediates of ammonia oxidation species at 350 °C. Experimental results suggest that high NOx conversion and N2 selectivity of 10 % Ce-loaded Sb-V2O5/TiO2 was attributed to enhanced acidity and reducibility.

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Acknowledgments

This work was financially supported by ‘Future core technology’ program from KIST and a grant from the ‘Fundamental R&D Program for the core technology of materials’ funded by Ministry of Knowledge Economy, Republic of Korea.

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Correspondence to Heon Phil Ha.

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Lee, K.J., Maqbool, M.S., Kumar, P.A. et al. Enhanced Activity of Ceria Loaded Sb-V2O5/TiO2 Catalysts for NO Reduction with Ammonia. Catal Lett 143, 988–995 (2013). https://doi.org/10.1007/s10562-013-1035-1

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  • DOI: https://doi.org/10.1007/s10562-013-1035-1

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