전자빔 조사에 따른 PEMFC용 Pt/C 촉매의 활성 및 내구성 변화

The influence of electron beam irradiation on the catalytic activity of Pt/C for polymer electrolyte membrane fuel cell (PEMFC) was investigated using a 2.5 MeV electron beam. Pt catalysts supported on Vulcan XC-72R were synthesized by a polyol method using chloroplatinic acid hydrate (H2PtCl6·6H2O) as a Pt precursor. Before and after e-beam irradiation, all synthesized catalysts were characterized by various physical and electrochemical techniques. Crystallinity change before and after e-beam irradiation was investigated by X-ray diffraction (XRD). Transmission electron microscopy (TEM) was utilized to examine the particle size of Pt. Pt loading amounts were determined by thermal gravimetric analysis (TGA). The catalytic activity for PEMFC was measured by both a half cell test and full cell test. The results show that the proper e-beam irradiation significantly improved the electrochemical activity of Pt/C. (Received March 3, 2014)