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50 wt%    Pt    Pt/MWCNT      . X        Pt  .   10, 20, 30  Pt   4.1, 4.9, 8.5 nm .            Pt     .Abstract: In this study, highly loaded(50 wt%) and very stable Pt/MWCNT catalysts for Poly-mer Electrolyte Membrane Fuel Cells(PEMFCs) are synthesized in short time scale by micro-wave assisted polyol method with different microwave irradiation time. The XRD and TEMresults show that the Pt size becomes bigger as the microwave irradiation time increases. Themean Pt sizes of fabricated catalysts are 4.1, 4.9 and 8.5 nm when the microwave are irradiatedfor 10, 20 and 30 min, respectively. When compared with Pt catalyst made by conventionalpolyol method, it shows better long term durability due to the better Pt dispersion on theMWCNT surface.Keywords : Platinum catalyst, Carbon Nanotube, Microwave, Durability

Synthesis and Study of Pt/MWCNTs Catalysts by Using Microwave Assisted Polyol Method for PEM Fuel Cells