NDLI: In situ supported MnOx–CeOx on carbon nanotubes for the low-temperature selective catalytic reduction of NO with NH3

Content Provider	Royal Society of Chemistry (RSC)
Author	Shi, Liyi Li, Hongrui Huang, Lei Zhang, Jianping Fang, Cheng Zhang, Dengsong Zhang, Lei Gao, Ruihua
Copyright Year	2013
Abstract	The MnOx and CeOx were in situ supported on carbon nanotubes (CNTs) by a poly(sodium 4-styrenesulfonate) assisted reflux route for the low-temperature selective catalytic reduction (SCR) of NO with NH3. X-Ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), X-ray photoelectron spectroscopy (XPS), H2 temperature-programmed reduction (H2-TPR) and NH3 temperature-programmed desorption (NH3-TPD) have been used to elucidate the structure and surface properties of the obtained catalysts. It was found that the in situ prepared catalyst exhibited the highest activity and the most extensive operating-temperature window, compared to the catalysts prepared by impregnation or mechanically mixed methods. The XRD and TEM results indicated that the manganese oxide and cerium oxide species had a good dispersion on the CNT surface. The XPS results demonstrated that the higher atomic concentration of Mn existed on the surface of CNTs and the more chemisorbed oxygen species exist. The H2-TPR results suggested that there was a strong interaction between the manganese oxide and cerium oxide on the surface of CNTs. The NH3-TPD results demonstrated that the catalysts presented a larger acid amount and stronger acid strength. In addition, the obtained catalysts exhibited much higher SO2-tolerance and improved the water-resistance as compared to that prepared by impregnation or mechanically mixed methods.
Starting Page	1127
Ending Page	1136
Page Count	10
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	5
Issue Number	3
Journal	Nanoscale
DOI	10.1039/c2nr33006g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Oxygen CNT Cerium Strong interaction Photoemission spectroscopy Manganese oxide London dispersion force Sulfur dioxide Carbon nanotube X-ray crystallography Ammonia Temperature-programmed reduction Transmission electron microscopy Sodium X-ray scattering techniques Selective catalytic reduction X-ray photoelectron spectroscopy
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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