Electro-oxidation of ethanol using PtSnRh/C electrocatalysts prepared by an alcohol-reduction process |
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Authors: | E V Spinacé Ricardo R Dias Michele Brandalise Marcelo Linardi and Almir Oliveira Neto |
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Institution: | 1.Instituto de Pesquisas Energéticas e Nucleares,IPEN—CNEN/SP,S?o Paulo,Brazil |
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Abstract: | PtRh/C (90:10), PtRh/C (50:50), PtSn/C (50:50), and PtSnRh/C (50:40:10) electrocatalysts were prepared by an alcohol-reduction
process using ethylene glycol as solvent and reduction agent and Vulcan Carbon XC72 as supports. The electrocatalysts were
characterized by energy-dispersive X-ray analysis, X-ray diffraction, and transmission electron microscopy. The electro-oxidation
of ethanol was studied by cyclic voltammetry chronoamperometry at room temperature and on a single cell of a direct ethanol
fuel cell at 100 °C. Cyclic voltammetry and chronoamperometry experiments showed that PtSnRh/C and PtSn/C electrocatalysts
have similar performance for ethanol oxidation at room temperature, while the activity of PtRh/C electrocatalysts was very
low. At 100 °C on a single cell, PtSnRh/C showed superior performance compared to PtSn/C and PtRh/C electrocatalysts. |
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