NDLI: Effect of zirconium on the structure and activity of Cu/Ti1−xZrxO2 catalysts for selective catalytic reduction of NO with C3H6

Content Provider	Royal Society of Chemistry (RSC)
Author	Liu, Jie Zhang, Dongke Zhao, Qidong Li, Xinyong
Copyright Year	2012
Abstract	Mixed oxides of 5 wt% Cu/Ti1−xZrxO2 (x = 0, 0.3, 0.5, 0.7, 1.0) were synthesized using the impregnation–urea coprecipitation method and the catalysts prepared were assessed for the selective catalyst reduction (SCR) of NO with C3H6. A significant improvement of the catalytic activity was found over the Zr-doped catalysts with the highest N2 yield of 67.2% achieved over Cu/Ti0.7Zr0.3O2 at 275 °C. Based on the characterizations using BET, ICP, XRD, H2-TPR, FTIR of adsorbed pyridine, XPS, and TEM, the enhanced SCR activity of Cu/Ti0.7Zr0.3O2 was attributed to the large surface area, appropriate structural disorder, abundant Lewis acid sites, increase in the amount of active sites, and greater lattice oxygen mobility. The specific physico-chemical properties were caused by the distortion of the crystal structure and the change of the electron charge density (ECD) due to the introduction of Zr species. The generation of mixed Ti–O–Zr bond was beneficial for the adsorption of NO and the oxidation of NO to NO2, which favored the SCR reaction.
Starting Page	1711
Ending Page	1718
Page Count	8
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	2
Issue Number	8
Journal	Catalysis Science & Technology
DOI	10.1039/c2cy20121f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Acid Oxygen Chemical bond BET X-ray crystallography Zirconium Pyridine Transmission electron microscopy Adsorption Lewis ICP Elementary charge Coprecipitation Crystal structure
Content Type	Text
Resource Type	Article
Subject	Catalysis

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