کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
67746 | 48493 | 2008 | 5 صفحه PDF | دانلود رایگان |

Silver nanoparticles were directly deposited on the surface of titanium by the hydrothermal method using polyethylene glycol as the reduction agent. The electrocatalytic activity of the prepared titanium-supported nanoAg/Ti electrode towards hydrazine oxidation in alkaline solutions was evaluated using cyclic voltammetry (CV) and chronoamperometry (CA). The CV results show that the nanoAg/Ti electrode is electrochemically active towards hydrazine oxidation with oxidation potentials ranging between −0.6 and 0.6 V vs. SCE. The onset potential of ca. −0.6 V vs. SCE for the hydrazine oxidation was recorded. A sharp increment in the current density of hydrazine oxidation with the increase of the hydrazine concentration was observed. CA results show stable steady-state current densities (iss) for the hydrazine oxidation. For the anodic potential holding at 0.1 V, the CA measurement delivered the iss value of over 0.58 mA cm−2 mM−1 in the presence of 20 mM hydrazine. A linear dependence of the iss upon the hydrazine concentration was found in the range of 0–60 mM hydrazine. Results imply that the nanoAg/Ti electrode presents stable and significantly high electroactivity for the hydrazine oxidation.
The titanium-supported Ag/Ti electrode, prepared by a one-step hydrothermal method, presents high and stable anodic current densities for the hydrazine oxidation as shown in chronoamperometric responses at the potential step of 0.1 V in 1 M NaOH solution with various concentrations of hydrazine. Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Catalysis A: Chemical - Volume 295, Issues 1–2, 12 November 2008, Pages 34–38