doi:

DOI: 10.3724/SP.J.1095.2013.30158

Chinese Journal of Applied Chemistry (应用化学) 2013/30:12 PP.1470-1475

Preparation of Silicotungstic Acid Modified Carbon Supported Pd Catalyst by Impregnation Method and Its Electrocatalytic Performance for Formic Acid Oxidation


Abstract:
The silicotungstic acid(SiWA) modified carbon supported Pd(Pd/C-SiWA) catalyst was prepared with immersing method. The chronoamperometric experiment shows that the current density are 0.013 A/mg and 0.082 A/mg at 3000 s for the Pd/C and Pd/C-SiWA catalysts, which are the 2.5% and 14.1% of that at 10 s, respectively. The result suggests that the electrocatalytic activity and stability of the Pd/C-SiWA catalyst for formic acid oxidation are much better than that of the Pd/C catalyst. This is attributed to that the Pd/C-SiWA catalyst inhibits the decomposition of formic acid leading to the decrease in the poisoning effect of CO. Thus, the electrocatalytic stability of the Pd/C catalyst for formic acid oxidation is improved.

Key words:direct formic acid fuel cell,carbon supported Pd catalyst,silicotungstic acid modification,formic acid oxidation,formic acid decomposition

ReleaseDate:2015-06-08 13:48:06



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