CeO2 Nanoparticle-Loaded MnO2 Nanoflowers for Selective Catalytic Reduction of NOx with NH3 at Low Temperatures

Li，Shun1; Zheng，Zuquan2; Zhao，Zhicheng3; Wang，Youling4; Yao，Yao3; Liu，Yong3; Zhang，Jianming1; Zhang，Zuotai2

2022-08-01

10.3390/molecules27154863

Molecules   Impact Factor & Quartile

1420-3049

CeO nanoparticle-loaded MnO nanoflowers, prepared by a hydrothermal method followed by an adsorption-calcination technique, were utilized for selective catalytic reduction (SCR) of NO with NH at low temperatures. The effects of Ce/Mn ratio and thermal calcination temperature on the NH–SCR activity of the CeO-MnO nanocomposites were studied comprehensively. The as-prepared CeO-MnO catalysts show high NO reduction efficiency in the temperature range of 150–300 °C, with a complete NO conversion at 200 °C for the optimal sample. The excellent NH–SCR performance could be ascribed to high surface area, intimate contact, and strong synergistic interaction between CeO nanoparticles and MnO nanoflowers of the well-designed composite catalyst. The in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTs) characterizations evidence that the SCR reaction on the surface of the CeO-MnO nanocomposites mainly follows the Langmuir–Hinshelwood (L-H) mechanism. Our work provides useful guidance for the development of composite oxide-based low temperature NH–SCR catalysts.

ion-adsorption Mn-Ce mixed oxide NOx conversion selective catalytic reduction

SCI

English

Corresponding

National Natural Science Foundation of China[52172187];

WOS:000839821700001

2-s2.0-85136766561

Scopus

1.Institute of Quantum and Sustainable Technology (IQST),School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang,212013,China
2.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Foshan (Southern China) Institute for New Materials,Foshan,528200,China
4.Shunde Graduate School,University of Science and Technology Beijing,Foshan,528399,China

Li，Shun,Zheng，Zuquan,Zhao，Zhicheng,et al. CeO2 Nanoparticle-Loaded MnO2 Nanoflowers for Selective Catalytic Reduction of NOx with NH3 at Low Temperatures[J]. Molecules,2022,27(15).

Li，Shun.,Zheng，Zuquan.,Zhao，Zhicheng.,Wang，Youling.,Yao，Yao.,...&Zhang，Zuotai.(2022).CeO2 Nanoparticle-Loaded MnO2 Nanoflowers for Selective Catalytic Reduction of NOx with NH3 at Low Temperatures.Molecules,27(15).

Li，Shun,et al."CeO2 Nanoparticle-Loaded MnO2 Nanoflowers for Selective Catalytic Reduction of NOx with NH3 at Low Temperatures".Molecules 27.15(2022).