کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
195950 | 459827 | 2007 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Oxygen reduction reaction on spontaneously and potentiodynamically formed Au/TiO2 composite surfaces Oxygen reduction reaction on spontaneously and potentiodynamically formed Au/TiO2 composite surfaces](/preview/png/195950.png)
From aqueous solutions, gold was deposited on freshly polished titanium surface either by displacement reaction or by potentiodynamic polarization. Both of these procedures resulted in the formation of Au/TiO2 composite layer over the titanium surface, although with quite different Au content. The electrochemical behaviour of these composite layers was examined in 0.1 M NaOH solution, both oxygen free and oxygen saturated, using rotating disc technique. In the potential region of oxygen reduction reaction, the Au/TiO2 layer obtained by potentiodynamic polarization, displayed the voltammetric curve similar to that observed on (1 0 0) plane of Au monocrystal. The Koutecky–Levich analysis evidenced that 4e− route of oxygen reduction dominates on both type of composite layers.
Journal: Electrochimica Acta - Volume 52, Issue 13, 20 March 2007, Pages 4581–4588