NDLI: Synergistic effects between copper and tungsten on the structural and acidic properties of CuOx/WOx

Content Provider	Royal Society of Chemistry (RSC)
Author	Si, Zhichun Weng, Duan Wu, Xiaodong Jiang, Yang Wang, Bin
Copyright Year	2011
Abstract	Different amounts of tungsten oxide were introduced to zirconia to form WOx–ZrO2 solid solutions by a coprecipitation method, followed by impregnation with copper nitrate. The received catalysts were characterized by X-ray diffraction, Brunauer–Emmett–Teller surface area, X-ray photoelectron spectroscopy, Raman spectroscopy, diffuse reflectance UV-vis spectroscopy, H2 temperature-programmed reduction and in situFTIR of NH3/NO+O2 adsorption. Higher dispersions of CuOx are obtained on the tungsten-containing catalysts due to the increased surface area of the support. Highly dispersed WOx clusters in tetrahedral coordination are generated when tungsten exceeds its solubility in the solid solutions, and polymerized WOx clusters are formed for further increasing the loading amount of tungsten. The formation of Cun+–O2−–Wn+ bonds at the interface between CuOx and WOx clusters leads to an improved capacity to form nitrite and an enhanced Brønsted acidity, which enhance the activity of the catalyst for NH3-SCR reaction.
Starting Page	453
Ending Page	461
Page Count	9
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	1
Issue Number	3
Journal	Catalysis Science & Technology
DOI	10.1039/c0cy00086h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Oxygen Copper(II) nitrate Photoemission spectroscopy Nitrite Raman spectroscopy X-ray crystallography Emmett Tungsten oxide Temperature-programmed reduction Ammonia Ultraviolet\u2013visible spectroscopy Adsorption Tungsten Raman Zirconium dioxide Coprecipitation X-ray photoelectron spectroscopy
Content Type	Text
Resource Type	Article
Subject	Catalysis

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