کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
62702 | 47651 | 2007 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrochemical promotion of NO reduction by C3H6 on Rh catalyst-electrode films supported on YSZ and on dispersed Rh/YSZ catalysts Electrochemical promotion of NO reduction by C3H6 on Rh catalyst-electrode films supported on YSZ and on dispersed Rh/YSZ catalysts](/preview/png/62702.png)
The selective catalytic reduction of NO by C3H6 in the presence of O2 was investigated on porous polycrystalline Rh catalyst-electrode films deposited on YSZ (Y2O3-stabilized ZrO2) and dispersed Rh/YSZ (0.5 wt%) catalysts. In the former case, it was found that the application of current or potential between the Rh catalyst-electrode and an Au counterelectrode enhanced the rate of NO reduction and CO2 formation by factors of up to 55 and 200, respectively. These rate increases were strongly non-Faradaic with apparent Faradaic efficiencies, Λ, of up to 7000 for the formation of CO2, demonstrating a significant effect of electrochemical promotion or non-Faradaic electrochemical modification of catalytic activity. A comparison of the activity between the electropromoted Rh paste catalyst and the dispersed Rh/YSZ catalyst shows that the TOFs on the dispersed Rh/YSZ catalyst fall between the corresponding TOFs on the unpromoted and electropromoted Rh catalyst-electrode film.
Journal: Journal of Catalysis - Volume 251, Issue 2, 25 October 2007, Pages 400–409