کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
48684 | 46518 | 2007 | 9 صفحه PDF | دانلود رایگان |
The effect of electrochemical promotion for the selective catalytic reduction of NO by propene was investigated, for the first time, on a Pt impregnated catalyst film directly deposited onto a Na–β″-Al2O3 solid electrolyte. The effect of sodium promoters on the activity and N2 selectivity was evaluated at 240 °C under different oxygen concentrations (0.5, 1 and 5%). The presence of promoters still enhanced the selectivity to N2, even under large excess of oxygen (5%), where the N2 reaction rate was increased by a factor of 1.8. Nevertheless, the promotional effect of sodium on the overall catalytic activity for NO removal was progressively lowered with increasing oxygen concentrations, as a result of a strong inhibition of propene adsorption and a relative increase of the oxygen coverage. Characterization by cyclic voltammetry supported these results, providing useful information about the chemisorption of reactant species under the different reaction conditions.
Journal: Applied Catalysis B: Environmental - Volume 73, Issues 1–2, 24 April 2007, Pages 42–50