کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5362869 | 1388294 | 2011 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrocatalysis of oxygen reduction reaction on Nafion/platinum/gas diffusion layer electrode for PEM fuel cell Electrocatalysis of oxygen reduction reaction on Nafion/platinum/gas diffusion layer electrode for PEM fuel cell](/preview/png/5362869.png)
In this work a new membrane electrode based on Pt-coated Nafion membrane was fabricated. Chemical deposition process was used to coat platinum on Nafion 117 membrane and then Pt-coated Nafion membrane was hot pressed on gas diffusion layer (GDL) to make new membrane electrode. The electrochemical and chemical studies of the Pt-coated Nafions were investigated by electrochemical techniques, X-ray diffraction and scanning electron microscopy. The electrochemical results indicated that as the concentration of H2PtCl6 increased, the oxygen reduction reaction rate increased until the concentration was reached where the reduction reaction was limited by the problem of mass transport. The electrochemical results for oxygen reduction reaction showed that the new electrode which prepared by plating Nafion membrane with 0.06 M H2PtCl6 in electroless plating solution, has a higher performance than other electrodes. The XRD results showed that the average platinum particle size of the best sample was about 3 nm. The loading of platinum for this electrode was 0.153 mg cmâ2.
⺠New gas diffusion electrode based on Pt-coated Nafion membrane was fabricated. ⺠Electroless method was used to deposit platinum on Nafion membrane. ⺠Electrochemical and chemical results showed good deposition of platinum particles on Nafion membrane. ⺠Compared with traditional electrode, new electrode based on Pt-coated Nafion membrane exhibited improved polarization performance.
Journal: Applied Surface Science - Volume 257, Issue 24, 1 October 2011, Pages 10408-10413