Inhibition of the Dissolution of Fe from Fe–Pt Nano Particles by a Structural Phase Transitions

抄録

Fe–Pt nanoparticles fabricated by the polyol process have been reported as a possible alternative material for use in catalytic electrodes for polymer electrolyte fuel cells (PEFCs). Catalytic Fe–Pt alloys suffer from a problem where Fe dissolves from the alloy. Here, we examined the dissolution of Fe into the electrolyte for various composition ratios of Fe to Pt. We have also described the characteristics of Fe–Pt nanoparticles on the basis of XRD, XRF, TEM-EDX and electrochemical measurements and have discussed the rinse effect of Fe–Pt nanoparticles in acid solutions and the annealing effect of Fe–Pt caused by structural phase transitions from disordered fcc to ordered fct phase structures.