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Research Article | Open Access

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

Chunlin ZHAOa( ), Yanxia WUa, Hailong LIANGa, Xi CHENa, Jie TANGa, Xianzhong WANGb,c
Institute of Ceramic Science, China Building Material Academy, Beijing, China
Department of Materials Science and Engineering, Pingxiang College, Jiangxi, China
Jiangxi Province Building Materials Industry Catalyst and Carrier Engineering Technology Research Center, Jiangxi, China
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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-temperatureselective catalytic reduction (SCR)N-doped grapheme (NG)manganese and cerium oxides

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Journal of Advanced Ceramics
Volume 7 Issue 3,
September 2018
Pages 197-206
DOI: 10.1007/s40145-018-0271-7
Cite this article:
ZHAO C, WU Y, LIANG H, et al. N-doped graphene and TiO2 supported manganese and cerium oxides on low-temperature selective catalytic reduction of NOx with NH3. Journal of Advanced Ceramics, 2018, 7(3): 197-206. https://doi.org/10.1007/s40145-018-0271-7

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Received: 08 December 2017
Revised: 18 March 2018
Accepted: 19 March 2018
Published: 10 October 2018
© The author(s) 2018

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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