Electroreforming of glucose/xylose mixtures on PdAu based nanocatalysts
Electroreformage de mélanges glucose/xylose sur des nanocatalyseurs PdAu
Résumé
The electro-reforming of glucose/xylose mixtures has been evaluated at Pd1-xAux/C anodes in 0.10 mol L-1 NaOH electrolyte. The catalysts synthesized by a wet chemistry route are comprehensively characterized by physicochemical and electrochemical techniques. From linear scan voltammetry and insitu Fourier transform infrared spectroscopy measurements, it was shown that the Pd0.3Au0.7/C material led to the best electrocatalytic behavior towards the electrooxidation of glucose/xylose mixtures in terms of activity (higher current densities at lower potentials) and selectivity (lower dissociative adsorption). Six-hour chronoamperometry measurements were performed at 293 K in a 25 cm 2 electrolysis cell at +0.4 V and +0.6 V and the reaction products were analyzed by high performance liquid chromatography. The main products were gluconate and xylonate, but the contributions of xylose to the whole products formed was always lower in percentages than the initial xylose ratios in solutions, showing that glucose was more electro-reactive than xylose at Pd0.3Au0.7 surface.
Domaines
Catalyse
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Accepted Manuscript Rafaïdeen et al. ChemElectroChem.pdf (1.58 Mo)
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