Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10266913 | Electrochemistry Communications | 2011 | 4 Pages |
Abstract
Pt/C, Bi/C and PtBi/C (Pt:Bi atomic ratios of 90:10, 70:30 and 50:50) electrocatalysts were prepared by borohydride reduction using H2PtCl6·6H2O and Bi(NO3)3·5H2O as metal sources and Vulcan XC72 as carbon support. The obtained electrocatalysts were characterized by energy-dispersive X-ray analysis, X-ray diffraction, transmission electron microscopy and cyclic voltammetry. The activity of the electrocatalysts for ethanol electro-oxidation was studied by chronoamperometry. PtBi/C electrocatalysts showed a significant increase of performance compared to Pt/C, while Bi/C showed no activity. Also, the performances of the PtBi/C electrocatalysts for ethanol electro-oxidation in alkaline medium were very superior to the ones obtained in acid medium.
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Authors
Marcelo M. Tusi, Nataly S.O. Polanco, Sirlane G. da Silva, Estevam V. Spinacé, Almir Oliveira Neto,