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    Effect of microwave irradiation on PEMFCs anode and cathode catalysts
    (Springer, 2023) Sahin, Oemer; Yilmaz, Adem; Ekinci, Arzu
    This study explored the effects of PtCo/C catalysts modified by microwave radiation as anode and cathode catalysts in proton exchange membrane (PEM) fuel cells. The PtCo/C catalyst was synthesized using sodium borohydride and formic acid-reducing agents by a chemical reduction method. The structural properties of PtCo/C and modified PtCo/C catalysts were analyzed by XRD analysis. The composition and distribution of these alloys in Vulcan XC-72R carbon were determined by SEM techniques. The electrochemical properties of the catalysts were evaluated by CV studies. The tafel slope b values for PtCo/C and modified PtCo/C catalysts were calculated as 84 mV/dec and 43 mV/dec when used as cathode catalysts, and 54 mV/dec and 41 mV/dec when used as anode catalysts, respectively. The power density values were calculated as 52 mW/cm(2) and 58 mW/cm(2) when PtCo/C and modified PtCo/C were used as cathode catalysts, and 33.48 mW/cm(2) and 52.08 mW/cm(2) when used as anode catalysts, respectively. The power density rises by 12% when the modified PtCo/C catalyst is employed as the anode catalyst and by 56% when it is used as the cathode catalyst, as compared to PtCo/C catalysts.
  • [ X ]
    Öğe
    Microwave application as an alternative method to increase the efficiency of PtC catalyst in PEMFCs
    (Sage Publications Ltd, 2023) Sahin, Omer; Yilmaz, Adem; Ekinci, Arzu
    This study aims to develop a high-performance Pt/C catalyst for the cathode and anode parts of a modified Proton exchange membrane (PEM) fuel cell in nitrogen and argon gases at different microwave radiation powers. The pure and modified forms of the synthesized Pt/C catalysts were characterised using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD results revealed that the crystal structure of the modified Pt/C catalyst was perfect and that the particle size of the catalytic material grew significantly as a consequence of the modification. Furthermore, the durability of PEM fuel cell electrocatalysts was investigated using the cyclic voltammetry (CV) technique. The experimental results indicated that microwave radiation had a significant effect on the particle size of the Pt/C catalyst. Additionally, the modified Pt/C catalyst exhibited a decreased activation potential loss and increased the cathode and anode power density values by 34% and 47%, respectively, compared to the Pt/C catalyst.