کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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219924 | 463305 | 2010 | 7 صفحه PDF | دانلود رایگان |
The electrocatalytic activity and product distribution of the nitrite reduction on Sn-modified noble metal (Ru, Pd, Rh, Pt, and Ir) electrodes, as well as unmodified noble metal electrodes, were examined in a 0.1 M HClO4 solution. The most effective coverages were 0.35 and 0.55 for the Sn/Pt and Sn/Pd, respectively. The activity of the Sn/Ru, Sn/Rh, and Sn/Ir electrodes simply increased with an increase in the Sn coverage. From the maximum current densities at −0.1 V, the orders of the reduction activity for the unmodified and Sn-modified electrodes were Ir > Pt > Pd > Ru > Rh and Sn/Ir ≈ Sn/Ru > Sn/Rh ≈ Sn/Pt > Sn/Pd, respectively. The electrolysis of nitrite for 5 h was carried out on each electrode in 0.1 M HClO4 at −0.2 V. The conversion of nitrite increased due to the Sn modification (4–27% conversion). The highest N2 selectivity (53%) was obtained using the unmodified Pt electrode. Sn was not effective for the N2 selectivity.
Journal: Journal of Electroanalytical Chemistry - Volume 647, Issue 2, 1 September 2010, Pages 187–193