Improvement of Platinum Particle Dispersion on Porous Electrode for Phosphoric Acid Fuel Cell

연료전지용 다공성전극에 있어서 백금촉매의 분산성개선

  • 박정일 (한양대학교 공업화학과) ;
  • 김조웅 (한양대학교 공업화학과) ;
  • 이주성 (한양대학교 공업화학과)
  • Received : 1990.09.25
  • Published : 1990.12.31

Abstract

To improve the dispersion of platinum catalyst, the effects of carbon black surface treatment, solvents, surfactants, and ultrasonic homogenizing were examined. Upon introducing the hydrophilic groups acting as an anchorage center of the catalyst on the surface of carbon black by oxidation, the migrating and growing of platinum particles(or ions) during reduction could be restricted. When mixed solvents, surfactants, or ultrasonic homogenizer were used to disperse catalysts on the carbon black, the dispersion of catalyst could be improved, due to the good permeation of chloroplatinic acid through the pore of carbon black. Among the impregnation methods, the method using ultrasonic homogenizer with mixed solvent was the most excellent. Using this method the particle sized could be minimized in less than $30A^{\circ}$ and distributed homogeneously.

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