Reduction of NO by CO over a silica-supported platinum catalyst: Infrared and kinetic studies
作者： D LORIMER , A BELL
DOI: 10.1016/S0021-9517(79)80027-5
关键词: Catalysis 、 Carbon monoxide 、 Infrared spectroscopy 、 Inorganic chemistry 、 Chemical reaction 、 Oxidizing agent 、 Reaction rate 、 Dissociation (chemistry) 、 Chemistry 、 Platinum
摘要: The reduction of NO by CO was studied over a Pt/SiO 2 catalyst at 300°C. Reaction rate data were obtained together with in situ infrared spectra species adsorbed on the surface. performance depended strongly ratio CO/NO reactor. For net reducing conditions (CO/NO > 1) deactivated time. Measurements kinetics taken during period slow deactivation showed that first order and inverse second CO. Reactivation both oxidizing pretreatments. Under In bands corresponding to chemisorbed Pt NCO CN groups attached support as Si-NCO Si-CN, respectively. Both more intense under than conditions. product selectivities observed found be good agreement mechanism based upon dissociation rate-limiting step. This further assumes N O is formed reaction an nitrogen atom. It proposed loss activity associated change electronic properties supported crystallites, caused accumulation large concentrations areas adjacent crystallites.
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sci-hub.se 参考文章(24)
L. H. Little, A. V. Kiselev, V. I. Lygin, Infrared Spectra of Adsorbed Species ,(1966)
F. Solymosi, T. Bansagi, Infrared spectroscopic study of the adsorption of isocyanic acid The Journal of Physical Chemistry. ,vol. 10, pp. 552- 553 ,(1979) , 10.1021/J100467A026
B. Lang, R.W. Joyner, G.A. Somorjai, Low energy electron diffraction studies of chemisorbed gases on stepped surfaces of platinum Surface Science. ,vol. 30, pp. 454- 474 ,(1972) , 10.1016/0039-6028(72)90012-X
M UNLAND, Isocyanate intermediates in the reaction of NO and CO over noble metal catalysts Journal of Catalysis. ,vol. 31, pp. 459- 465 ,(1973) , 10.1016/0021-9517(73)90318-7
M. Wilf, P.T. Dawson, Adsorption of nitrogen on platinum Surface Science. ,vol. 60, pp. 561- 581 ,(1976) , 10.1016/0039-6028(76)90334-4
R. J. H. VOORHOEVE, L. E. TRIMBLE, D. J. FREED, Synthesis of Ammonium Cyanate and Urea by Reduction of Nitric Oxide on Platinum, Rhodium, and Ruthenium Catalysts Science. ,vol. 200, pp. 759- 761 ,(1978) , 10.1126/SCIENCE.200.4343.759
F SOLYMOSI, Study of the formation of isocyanate surface complexes on Pt/Al2O3 catalysts Journal of Catalysis. ,vol. 46, pp. 297- 307 ,(1977) , 10.1016/0021-9517(77)90213-5
M. L. Unland, Isocyanate Intermediates in Ammonia Formation over Noble Metal Catalysts for Automobile Exhaust Reactions Science. ,vol. 179, pp. 567- 569 ,(1973) , 10.1126/SCIENCE.179.4073.567
Frigyes Solymosi, János Kiss, Adsorption and reduction of NO on tin(IV) oxide catalysts Journal of Catalysis. ,vol. 41, pp. 202- 211 ,(1976) , 10.1016/0021-9517(76)90335-3
Y. Iwasawa, R. Mason, M. Textor, G.A. Somorjai, The reactions of carbon monoxide at coordinatively unsaturated sites on a platinum surface Chemical Physics Letters. ,vol. 44, pp. 468- 470 ,(1976) , 10.1016/0009-2614(76)80706-3