Abstract
Pd-modified Ni foam electrodes were prepared by a spontaneous deposition method. Ni foam samples were immersed in acid PdCl2 solutions for different durations (t SD). The Pd loading and the surface area of the Pd deposits were determined as a function of [PdCl2] and t SD. SEM–EDX showed that Pd deposits were homogeneously formed on the walls of both the outer and the inner cells of the Ni foam. Pd-modified Ni foam electrodes were used as anodes for the oxidation of methanol, ethanol, ethylene glycol, and glycerol in basic media. Voltammetric curves for the oxidation of alcohols showed that the peak current increased with increasing Pd loading in a sub-linear way. For the lowest loading explored (ca. 1 mg of Pd in a 1 cm3 foam volume), the peak current per unit Pd mass was of the order of 650 A g−1 for 0.5 M methanol and ethanol, ca. 1,500 A g−1 for glycerol and higher than 2,000 A g−1 for ethylene glycol.
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The authors acknowledge the financial support of the Italian Ministry for Economic Development (MSE), MSE-CNR Agreement on National Electrical System. The authors are indebted to FILA INDUSTRIA CHIMICA SPA, San Martino di Lupari, Padova, Italy, owner of the Fei-ESem FEI Quanta 200 FEG instrument, for allowing its use for the research work described in this article.
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Verlato, E., Cattarin, S., Comisso, N. et al. Preparation of Pd-Modified Ni Foam Electrodes and Their Use as Anodes for the Oxidation of Alcohols in Basic Media. Electrocatal 3, 48–58 (2012). https://doi.org/10.1007/s12678-011-0075-9
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DOI: https://doi.org/10.1007/s12678-011-0075-9