DRIFT study of the interaction of NO and O2 with the surface of Ce0.62Zr0.38O2 as deNOx catalyst

✍ Scribed by Małgorzata Adamowska; Andrzej Krztoń; Mieczysława Najbar; Patrick Da Costa; Gérald Djéga-Mariadassou

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 407 KB
• Volume: 137
• Category: Article
• ISSN: 0920-5861
• DOI: 10.1016/j.cattod.2008.01.013

✦ Synopsis

Gas-solid interactions and surface intermediates evolution after NO adsorption onto calcined Ce 0.62 Zr 0.38 O 2 were investigated. The results of adsorption and temperature-programmed desorption of NO were explained using diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS) coupled with temperature-programmed experiments in environmental cell. Surface NO-containing species such as nitrites and nitrates were identified during evolution of NO on the surface of Ce 0.62 Zr 0.38 O 2 solid solution at low and high temperature. The ceria-zirconia solid solution was found to be active in deNO x reaction in the presence of a ''toluene, propene and propane'' mixture.