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Hollow MnOx–CeO2 Nanospheres Prepared by a Green Route: A Novel Low-Temperature NH3-SCR Catalyst

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Abstract

A series of manganese–cerium oxide (MnOx–CeO2) catalysts were successfully prepared by supercritical antisolvent process and used for low temperature selective catalytic reduction (SCR) of NOx with NH3. The physicochemical properties of the catalysts were studied by using high-resolution transmission electron microscope, N2 adsorption, X-ray diffraction, X-ray photoelectron spectra, Raman spectra and temperature programmed reduction etc. Hollow spherical morphologies, nanocrystalline structures and solid solution structures were detected for these catalysts. The most active hollow nanospheres were obtained with a molar Mn/(Mn+Ce) ratio of 0.32 and a calcination temperature of 500 °C. Higher surface area, better oxygen mobility and richer surface active oxygen species are responsible for the good performance. The hollow MnOx–CeO2 nanospheres can be a new alternative for the low-temperature SCR catalysts.

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Acknowledgments

The project is financially supported by the National Natural Science Foundation of China (Nos. 20976120) and the Natural Science Foundation of Tianjin (No. 09JCYBJC06200).

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Authors and Affiliations

  1. Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin, 300072, China

    Haoxi Jiang, Jing Zhao, Dongyu Jiang & Minhua Zhang

  2. Post-doctor Station for Science and Technology of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China

    Haoxi Jiang

  3. Post-doctor Workstation for Science and Technology, Shandong Haihua Group Co. Ltd, Weifang, 262737, Shandong, China

    Haoxi Jiang

Authors
  1. Haoxi Jiang
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  2. Jing Zhao
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  3. Dongyu Jiang
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  4. Minhua Zhang
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Correspondence to Minhua Zhang.

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Jiang, H., Zhao, J., Jiang, D. et al. Hollow MnOx–CeO2 Nanospheres Prepared by a Green Route: A Novel Low-Temperature NH3-SCR Catalyst. Catal Lett 144, 325–332 (2014). https://doi.org/10.1007/s10562-013-1113-4

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  • DOI: https://doi.org/10.1007/s10562-013-1113-4

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