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Journal of Advanced Ceramics

, Volume 7, Issue 3, pp 197–206 | Cite as

N-doped graphene and TiO2 supported manganese and cerium oxides on low-temperature selective catalytic reduction of NOx with NH3

  • Chunlin Zhao
  • Yanxia Wu
  • Hailong Liang
  • Xi Chen
  • Jie Tang
  • Xianzhong Wang
Open Access
Research Article
  • 18 Downloads

Abstract

A series of N-doped graphene (NG) and TiO2 supported MnOx–CeO2 catalysts were prepared by a hydrothermal method. The catalysts with different molar ratios of Mn/Ce (6: 1, 10: 1, 15: 1) were investigated for the low-temperature selective catalytic reduction (SCR) of NOx with NH3. The synthesized catalysts were characterized by HRTEM, SEM, XRD, BET, XPS, and NH3-TPD technologies. The characterization results indicated that manganese and cerium oxide particles dispersed on the surface of the TiO2–NG support uniformly, and that manganese and cerium oxides existed in different valences on the surface of the TiO2–NG support. At Mn element loading of 8 wt%, MnOx–CeO2(10: 1)/TiO2–1%NG displayed superior activity and improved SO2 resistance. On the basis of the catalyst characterization, excellent catalytic performance and SO2 tolerance at low temperature were attributed to the high content of manganese with high oxidation valence, extensive oxidation of NO into NO2 by CeO2 and strong NO adsorption capacity, and electron transfer of N-doped graphene.

Keywords

low-temperature selective catalytic reduction (SCR) N-doped grapheme (NG) manganese and cerium oxides 

Notes

Acknowledgements

This project is financially supported by the Program of Frontier Exploration Fund of China Building Materials Academy, “the whole process of air pollution control on new technology research” (No. 2016YFC0209302).

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Copyright information

© The Author(s) 2018

Authors and Affiliations

  • Chunlin Zhao
    • 1
  • Yanxia Wu
    • 1
  • Hailong Liang
    • 1
  • Xi Chen
    • 1
  • Jie Tang
    • 1
  • Xianzhong Wang
    • 2
    • 3
  1. 1.Institute of Ceramic ScienceChina Building Material AcademyBeijingChina
  2. 2.Department of Materials Science and EngineeringPingxiang CollegeJiangxiChina
  3. 3.Jiangxi Province Building Materials Industry Catalyst and Carrier Engineering Technology Research CenterJiangxiChina

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