کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1285106 | 973119 | 2010 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Facile synthesis of PtAu alloy nanoparticles with high activity for formic acid oxidation Facile synthesis of PtAu alloy nanoparticles with high activity for formic acid oxidation](/preview/png/1285106.png)
We report the facile synthesis of carbon supported PtAu alloy nanoparticles with high electrocatalytic activity as anode catalysts for direct formic acid fuel cells (DFAFCs). PtAu alloy nanoparticles are prepared by co-reducing HAuCl4 and H2PtCl6 with NaBH4 in the presence of sodium citrate and then deposited on Vulcan XC-72R carbon support (PtAu/C). The obtained catalysts are characterized with X-ray diffraction (XRD) and transmission electron microscope (TEM), which reveal the formation of PtAu alloy nanoparticles with an average diameter of 4.6 nm. Electrochemical measurements show that PtAu/C has seven times higher catalytic activity towards formic acid oxidation than Pt/C. This significantly enhanced activity of PtAu/C catalyst can be attributed to noncontinuous Pt sites formed in the presence of the neighbored Au sites, which promotes direct oxidation of formic acid.
Journal: Journal of Power Sources - Volume 195, Issue 4, 15 February 2010, Pages 1103–1106