کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1272581 | 1497596 | 2010 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Oxygen reduction on carbon supported Pt-W electrocatalysts Oxygen reduction on carbon supported Pt-W electrocatalysts](/preview/png/1272581.png)
The catalytic activity of Pt-W electrocatalysts towards oxygen reduction reaction (ORR) was studied. Pt-W/C materials were prepared by thermolysis of tungsten and platinum carbonyl complexes in 1-2 dichloro-benzene during 48 h. The precursors were mixed to obtain relations of Pt:W: 50:50 and 80:20%w, respectively. The Pt carbonyl complex was previously synthesized by bubbling CO in a chloroplatinic acid solution. The synthesized materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), cyclic voltammetry (CV) and a rotating disk electrode (RDE). The results show that both materials (Pt50W50/C and Pt80W20/C) have a crystalline phase associated with metallic platinum and an amorphous phase related with tungsten and carbon. The particle size of the electrocatalysts depends on the relationship between platinum and tungsten. Finally, both materials exhibit catalytic activity for oxygen reduction.
Journal: International Journal of Hydrogen Energy - Volume 35, Issue 21, November 2010, Pages 12111–12114