Application of Quasihexagonal Pt@PdS2-MWCNT catalyst with High Electrochemical Performance for Electro-Oxidation of Methanol, 2-Propanol, and Glycerol Alcohols For Fuel Cells

Abstract

Today, it is very important to develop energy conversion devices such as fuel cells in order to meet the demand for clean energy. In fuel cells, on the other hand, nanostructures are frequently used. To benefit from this activity, the dendritic semi-hexagonal Pt@PdS2-MWCNT catalyst was synthesized using the hydrothermal method within the scope of the study. According to XRD results, it was determined that the crystal structure of Pt@PdS2-MWCNT was formed, and it had a crystal size of 4.11 nm. In addition, because of TEM studies, it was observed that there were particles of 4.02 nm on the MWCNT surface and a Quasihexagonal structure was obtained. The resulting catalyst was used in fuel cell application as an anodic catalyst for the oxidation of methanol, 2-propanol, and glycerol. The catalyst synthesized in the results obtained; Current peaks of 86.71 mA/cm2, 67.32 mA/cm2 and 58.44 mA/cm2 were obtained in cyclic voltammetry for methanol, 2-propanol, and glycerol, respectively. At the same time, scanning speed, chronoamperometry and long-term stability tests were performed for electro-oxidation stability and stability of the catalyst for methanol, 2-propanol and glycerol oxidations using sulfuric acid buffer solution. The results provided better stability and activity of the catalyst, with a higher current peak and 11.7% retention for methanol oxidation compared to other alcohols.