화학공학소재연구정보센터
Korean Chemical Engineering Research, Vol.46, No.4, 697-700, August, 2008
Bismuth를 이용한 다층구조의 개미산 연료전지 연료전극 개발
Development of a Formic Acid Fuel Cell Anode by Multi-layered Bismuth Modification
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초록
본 연구에서는 개미산 연료전지의 연료극에서 Pt 촉매의 안정성과 활성을 높이기 위해 Bi를 UPD법을 이용하여 Pt 촉매 위에 증착시켰다. 증착된 Bi의 활용도를 높이기 위해 다층 전극구조를 적용하였으며, 전자탐침미세분석(EPMA) 결과에서 Bi가 장기성능 실험동안 촉매층에 안정적으로 존재하는 것을 확인할 수 있었다. 연료전지 성능실험에서는 Pt black 촉매 위에 Bi를 UPD한 다층 구조의 전극이 PtRu black 촉매보다 전류밀도 150 mA/cm2에서 약 200 mV정도 높은 성능을 나타냈다. Pt black을 40% Pt/C로 대체했을 경우 역시 높은 성능과 장기 안정성을 보였다.
The underpotential deposited Bi on Pt(Biupd /Pt) anode for formic acid fuel cells (FAFCs) was developed using multi-layered preparation method for better electrocatalytic utilization of Pt. The electron probe microanalysis (EPMA) result indicated that Biupd remains through the catalyst layer during stability test. In performance test, the multilayered Biupd on Pt black showed superior performance by approximately 200 mV at current density of 150 mA/cm2 compared with PtRu black anode catalyst. Based on preparation condition of Biupd /Pt black, carbon supported Biupd /Pt/C electrode was prepared and it showed enhanced performance and stability.
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