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- W2094352838 abstract "The catalytic reduction of NO by H2 on Pt(100) exhibits sustained kinetic oscillations at low feed-gas pressures (total pressures less than 10–3 Pa) and isothermal conditions. As part of a study of these phenomena work function change, low energy electron diffraction (LEED) and thermal-desorption spectroscopy (TDS) measurements have been made of the interaction of NO and H2, separately and together, with the Pt(100) surface. Coadsorption of H2 and NO at 170 K leads to the appearance of extremely narrow TDS product peaks of N2 and H2O at ∼~ 400 K. Temperatures cycles under conditions of constant H2 and NO partial pressures revealed the existence of a hysteresis in the reaction rate that is associated with the 1 × 1 ⇌ hex phase transition. Besides H2O one also observes NH3 as a reaction product with the product ratios depending on the temperature and on the surface structure. A specific procedure is required for the initiation of kinetic oscillations. This involves first heating the sample to 550 K in an appropriate NO/H2 mixture and then cooling into a temperature window between 410 and 450 K." @default.
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- W2094352838 date "1991-01-01" @default.
- W2094352838 modified "2023-09-26" @default.
- W2094352838 title "Interaction of NO and H2 with Pt(100)" @default.
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- W2094352838 doi "https://doi.org/10.1016/0169-4332(91)90317-d" @default.
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