| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 67746 | Journal of Molecular Catalysis A: Chemical | 2008 | 5 Pages |
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.
Graphical abstractThe 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 full-size imageDownload as PowerPoint slide
