Preparation of PtSnO 2/C electrocatalysts using electron beam irradiation

PtSnO 2/C electrocatalysts with Pt:Sn atomic ratios of 75:25, 50:50 and 25:75 were prepared in water/2-propanol using electron beam irradiation. The materials were characterized by energy-dispersive X-ray analysis, X-ray diffraction, Mössbauer spectroscopy and transmission electron microscopy. The e...

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Published inMaterials science & engineering. B, Solid-state materials for advanced technology Vol. 175; no. 3; pp. 261 - 265
Main Authors Silva, Dionísio F., Geraldes, Adriana N., Neto, Almir Oliveira, Pino, Eddy S., Linardi, Marcelo, Spinacé, Estevam V., Macedo, Waldemar A.A., Ardisson, José D.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2010
Subjects
Electrocatalyst
Electron beam
Ethanol
Fuel cell
Platinum
SnO 2
SnO 2
Electrocatalyst
Ethanol
Platinum
Electron beam
Fuel cell
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Summary:PtSnO 2/C electrocatalysts with Pt:Sn atomic ratios of 75:25, 50:50 and 25:75 were prepared in water/2-propanol using electron beam irradiation. The materials were characterized by energy-dispersive X-ray analysis, X-ray diffraction, Mössbauer spectroscopy and transmission electron microscopy. The electro-oxidation of ethanol was studied by chronoamperometry at room temperature and on direct ethanol fuel cell (DEFC) at 100 °C. The X-ray diffraction and Mössbauer measurements of the PtSnO 2/C electrocatalysts showed typical face-centered cubic (fcc) structure of platinum and the presence of a SnO 2 phase (cassiterite). The PtSnO 2/C electrocatalysts were active for ethanol electro-oxidation and the material with Pt:Sn atomic ratio of 50:50 showed the best performance.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2010.08.002