کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
195417 | 459813 | 2006 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Sweet aqueous solution for electrochemical synthesis of polypyrrole: Part 1-A. On non-ferrous metals Sweet aqueous solution for electrochemical synthesis of polypyrrole: Part 1-A. On non-ferrous metals](/preview/png/195417.png)
The electrosynthesis of polypyrrole (PPy) has been achieved on aluminum electrode in aqueous medium of 0.1 M saccharin sodium salt and 0.5 M pyrrole. Scanning electron microscopy shows that the PPy coating obtained in galvanostatic and potentiostatic modes starts with small islands at weak applied potentials or current densities. Moreover, energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) reveal a good homogeneity of the film achieved in cyclic voltammetry during 10 cycles. The electrochemical impedance spectroscopy (EIS) results show that the coating decreases the polarization resistance of the aluminum electrode. The open circuit potential (OCP) and dc polarization measurements achieved in HCl and NaCl solutions displayed a large positive displacement of corrosion potential and a reduction of corrosion current in the case of PPy coating electrode in comparison with electrode bare.
Journal: Electrochimica Acta - Volume 51, Issue 12, 25 February 2006, Pages 2417–2426