화학공학소재연구정보센터
Applied Chemistry, Vol.3, No.2, 180-183, October, 1999
직접 메탄올 연료전지를 위한 anode 전극재료 개발
Anode Electrode Materials for Direct Methanol Fuel Cells
Direct methanol fuel cell (DMFC) needs better anode electrocatalysts than Pt, which suffers from self CO poisoning phenomena. The improved oxidation kinetics enabled by Pt promoters such as Ru, Sn, Mo, W or Os has been attributed to a bifunctional and/or an electronic effect. The alloy electrode materials were prepared by reduction and colloidal methods. It was generally proved that binary system such as those based on Pt, these components are much more active in promoting DMFC reactions than pure platinum catalysts. The oxidation onset on pure Pr was 0.45 V and the potentials decreased with alloying. Pt-Ru showed the lowest onset potential. However, chronoamperometry provided high stability at Pt-Mo on CO poisoning, which shows a promising candidate as DMFC anode material. The strategy of ternary or quatermary electrocatalysts, the effects of synthesis and particle sizes will be discussed.