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• W1990575909 abstract "The aim of this work focuses on studying the metallic amorphous alloys of composition Ni59Nb40Pt1−xYx (Y = Cu, Ru, x = 0.4% at.), obtained by mechanical alloying (MA), in the ethanol oxidation. The addition of copper or ruthenium as co-catalysts, modifies the electronic properties of platinum, demonstrating better performance in ethanol and CO electro-oxidation reactions. Ni59Nb40Pt0.6Cu0.4 alloy provides higher current densities towards ethanol electro-oxidation than Ni59Nb40Pt0.6Ru0.4 alloy but the possible formation of copper oxides limits its performance. The voltammograms for CO stripping clearly show that alloy with ruthenium possesses a better CO tolerance, decreasing the onset potential 109 mV with regard to Ni59Nb40Pt0.6Cu0.4 alloy. The presence of ruthenium is able to provide oxygenated adsorbed species coming from the cleavage of the water molecule, according to Langmmuir-Hinshelwood mechanism that it allows the CO oxidation to CO2. The homolytic cleavage C–C bond is critical step in the ethanol electro-oxidation to CO2. The formation of acetic acid (AA) as final product is known, limiting the electric efficiency in Direct Ethanol Fuel Cells (DEFCs). The oxidation process was investigated by in situ Fourier Transformed Infrared Reflectance (FTIR) spectroscopy. The experimental results showed that both amorphous alloys can oxidize AA to CO2." @default.
• W1990575909 created "2016-06-24" @default.
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• W1990575909 date "2011-09-01" @default.
• W1990575909 modified "2023-09-24" @default.
• W1990575909 title "Acetic acid decarboxylation by amorphous alloys with low loading of platinum" @default.
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• W1990575909 doi "https://doi.org/10.1016/j.ijhydene.2011.06.103" @default.
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