Promoting effect of CeO2 on NOx reduction with propene over SnO2/Al2O3 catalyst studied with in situ FT-IR spectroscopy

作者：Liu Zhiming; Oh Kwang Seok; Woo Seong Ihl^*

来源：Catalysis Letters, 2008, 120(1-2): 143-147.

DOI：10.1007/s10562-007-9266-7

• CeO2
• selective catalytic reduction
• NOx
• CeO2-SnO2/Al2O3
• catalyst
• XPS
• in situ FT-IR

The mechanistic cause of the promoting effect of CeO2 on the activity of SnO2/Al2O3 catalyst for the SCR of NO (x) by propene was investigated using X-ray photoelectron spectra (XPS) and in situ Fourier transform infrared (FT-IR) spectroscopy. FT-IR measurements have revealed that the role of CeO2 on the CeO2-SnO2/Al2O3 catalyst is to contribute to the formation of formate, acetate and nitrate species, and to promote the reaction between nitrates and hydrocarbon-derived species to form isocyanate (-NCO), which is a reaction intermediate for NO (x) reduction.

• 出版日期2008-1