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- Title
CeO 2 Nanoparticle-Loaded MnO 2 Nanoflowers for Selective Catalytic Reduction of NO x with NH 3 at Low Temperatures.
- Authors
Li, Shun; Zheng, Zuquan; Zhao, Zhicheng; Wang, Youling; Yao, Yao; Liu, Yong; Zhang, Jianming; Zhang, Zuotai
- Abstract
CeO2 nanoparticle-loaded MnO2 nanoflowers, prepared by a hydrothermal method followed by an adsorption-calcination technique, were utilized for selective catalytic reduction (SCR) of NOx with NH3 at low temperatures. The effects of Ce/Mn ratio and thermal calcination temperature on the NH3–SCR activity of the CeO2-MnO2 nanocomposites were studied comprehensively. The as-prepared CeO2-MnO2 catalysts show high NOx reduction efficiency in the temperature range of 150–300 °C, with a complete NOx conversion at 200 °C for the optimal sample. The excellent NH3–SCR performance could be ascribed to high surface area, intimate contact, and strong synergistic interaction between CeO2 nanoparticles and MnO2 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 CeO2-MnO2 nanocomposites mainly follows the Langmuir–Hinshelwood (L-H) mechanism. Our work provides useful guidance for the development of composite oxide-based low temperature NH3–SCR catalysts.
- Subjects
LOW temperatures; CERIUM oxides; CATALYTIC reduction; CALCINATION (Heat treatment); FOURIER transform infrared spectroscopy; SURFACE area
- Publication
Molecules, 2022, Vol 27, Issue 15, p4863
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules27154863