Abstract
Catalytic activities of platinum (Pt), palladium (Pd) and platinum-ruthenium (PtRu black) modified gas diffusion layers (GDL), so called gas diffusion electrodes (GDE),were studied for electrooxidation of formic acid in aqueous acidic solution. The effects of formic acid concentration and medium temperature on the oxidation were investigated. Additionally, cyclic voltammetric investigation (CV), electrochemical impedance spectroscopy (EIS) and amperometric measurements were carried out by using modified catalysts. Electrochemical measurements indicated that the modified PtRu/C black exhibits higher electrocatalytic activity than Pt/C and Pd/C catalysts.
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