A novel titanium-supported Ag/Ti electrode for the electro-oxidation of hydrazine

作者：Yi, Qingfeng^*; Li, Lei; Yu, Wenqiang; Zhou, Zhihua; Xu, Guorong

来源：Journal of Molecular Catalysis A: Chemical , 2008, 295(1-2): 34-38.

DOI：10.1016/j.molcata.2008.08.013

• Hydrazine oxidation
• Silver electrode
• Hydrothermal method
• Nanoparticles
• Ti electrode

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 0.6V 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 (i(ss)) for the hyrdrazine oxidation. For the anodic potential holding at 0.1 V, the CA measurement delivered the i(ss) value of over 0.58 mA cm(-2) mM(-1) in the presence of 20 mM hydrazine. A linear dependence of the i(ss) 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.

• 出版日期2008-11-12
• 单位湖南科技大学