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Mechanism of selective catalytic reduction of NO in the presence of excess O2 over Pt/Si-MCM-41 catalyst |
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| Affiliation: | 1. School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Islamic Republic of Iran;2. Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand;1. Tomsk State University, Prospect Lenina 36, 634050 Tomsk, Russia;2. Boreskov Institute of Catalysis, Prospect Lavrentieva 5, 630090 Novosibirsk, Russia;3. Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia;1. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Centro Atómico Bariloche (CNEA), Av. Bustillo 9500, R8402AGP, S.C. de Bariloche, Río Negro, Argentina;2. Instituto Balseiro, Universidad Nacional de Cuyo, Argentina |
| Abstract: | The reaction mechanism for the selective catalytic reduction (SCR) of nitric oxide (NO) over Pt/Si-MCM-41 catalyst has been studied by XPS and in-situ Fourier transform infrared (FTIR) spectroscopies as well as TPR. The XPS results indicate that Pt species are reduced during the reaction of NO-SCR in the presence of excess oxygen. The reduced Pt species are found not to be completely oxidised after they have been in contact with NO or O2 at the reaction temperature. FTIR results indicate that CO is one of the reaction intermediates taking part in the selective reduction of NO. The possible reaction mechanism for the selective catalytic reduction of NO over Pt/Si-MCM-41 catalyst is proposed. |
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