Preparation of PtSnO2/C electrocatalysts using electron beam irradiation

PtSnO2/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, Moessbauer 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, Dionisio F, Geraldes, Adriana N, Neto, Almir Oliveira, Pino, Eddy S, Linardi, Marcelo, Spinace, Estevam V, Macedo, Waldemar AA, Ardisson, Jose D
Format Journal Article
LanguageEnglish
Published 15.12.2010
Subjects
Diffraction
Electrocatalysts
Electron beams
Ethanol
Ethyl alcohol
Irradiation
Tin dioxide
X-rays
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Summary:PtSnO2/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, Moessbauer 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 100AC. The X-ray diffraction and Moessbauer measurements of the PtSnO2/C electrocatalysts showed typical face-centered cubic (fcc) structure of platinum and the presence of a SnO2 phase (cassiterite). The PtSnO2/C electrocatalysts were active for ethanol electro-oxidation and the material with Pt:Sn atomic ratio of 50:50 showed the best performance.
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ISSN:0921-5107
DOI:10.1016/j.mseb.2010.08.002