Abstract
In the present work the influence of the design of exfoliated graphite based electrodes on their catalytic activity towards phenol and methanol electro-oxidation was examined. Exfoliated graphite (EG) and EG/Pd composite were used as electrodes for phenol and methanol oxidation. EG was obtained by thermal exfoliation of graphite intercalation compound with sulfuric acid and the EG/Pd composite was prepared by electrochemical deposition of palladium onto exfoliated graphite. Morphology of the obtained materials was characterized by scanning electron microscopy (SEM). Three types of electrode design, in the form of a tablet, with polyvinylidene fluoride binder (PVDF) and a powder type electrode placed in a polymeric pocket were examined. The processes of phenol and methanol oxidation were examined in alkaline electrolyte using cyclic voltammetry and potentiostatic methods. Electrochemical results revealed that electrode design has a crucial influence on its catalytic activity towards process of phenol and methanol electro-oxidation. According to results of cyclic voltammetry measurements, the highest activity exhibit powder type electrodes. Furthermore it is proved that electrode construction is strongly related with the chemical composition of material used for its preparation.
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This work was supported by National Science Centre of Poland research grant no. 2015/17/B/ST8/00371.
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Rozmanowski, T., Krawczyk, P., Wolańczyk, J. (2020). Impact of Electrodes Design on Their Activity in the Oxidation of Organic Pollutants. In: Ochowiak, M., Woziwodzki, S., Mitkowski, P., Doligalski, M. (eds) Practical Aspects of Chemical Engineering. PAIC 2019. Springer, Cham. https://doi.org/10.1007/978-3-030-39867-5_37
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