Direct oxidation of ethylene glycol on PtSn/C for application in alkaline fuel cell
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2017
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International Journal of Electrochemical Science
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PtSn/C electrocatalysts with different molar ratios were synthesized by borohidrate process for glycol ethylene oxidation. All electrocatalysts were, also, characterized by X-ray diffraction (XRD), transmission electronic microscopy (TEM), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIRS), energy dispersive X-ray (EDX), while the electrochemical activities of those materials were evaluated by cyclic voltammetry, chronoamperometry and polarization curves in Direct Ethylene Glycol Alkaline Fuel Cells (DEGAFC). TEM results for PtSn/C electrocatalysts showed crystallite size of 4 nm. The curves of power density indicated that PtSn/C, with molar ratio of 70:30, presented the best results for glycol ethylene oxidation, in comparison with other alternatives prepared. These results may be associated to the selectivity to form oxalate or a bifunctional mechanism (oxygenated species from Sn).
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SOUZA, LETICIA L. de; OLIVEIRA NETO, ALMIR; FORBICINI, CHRISTINA A.L.G. de O. Direct oxidation of ethylene glycol on PtSn/C for application in alkaline fuel cell. International Journal of Electrochemical Science, v. 12, n. 12, p. 11855-11874, 2017. DOI: 10.20964/2017.12.57. Disponível em: http://repositorio.ipen.br/handle/123456789/28504. Acesso em: 25 Apr 2024.
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