마이크로파-폴리올법을 이용한 고분자 전해질 연료전지용 Pt/MWCNTs 촉매의 제조 및 이의 특성분석 = Synthesis and Study of Pt/MWCNTs Catalysts by Using Microwave Assisted Polyol Method for PEM Fuel Cells

국문 초록 (Abstract)

본 연구에서는 50 wt%에 달하는 매우 높은 Pt 담지량에서도 장기내구성이 우수한 연료전지용 Pt/MWCNT 촉매를 마이크로파를 이용한 폴리올법을 이용하여 제조하였다. X선 회절분석법과 투과전자현미경 분석결과 마이크로파 조사시간이 늘어남에 따라 Pt의 크기가 증가하였다. 마이크로파 조사시간이 10분, 20분, 30분일 경우 Pt 크기는 각각 4.1, 4.9, 8.5 nm로 나타났다. 마이크로파를 사용하지 않은 기존 폴리올 방법에 의해 제조된 촉매와 비교하였을 경우 Pt 분산도와 장기내구성이 증가한 것으로 나타났다.

다국어 초록 (Multilingual Abstract)

In this study, highly loaded(50 wt%) and very stable Pt/MWCNT catalysts for Polymer Electrolyte Membrane Fuel Cells(PEMFCs) are synthesized in short time scale by microwave assisted polyol method with different microwave irradiation time. The XRD and TEM results show that the Pt size becomes bigger as the microwave irradiation time increases. The mean Pt sizes of fabricated catalysts are 4.1, 4.9 and 8.5 nm when the microwave are irradiated for 10, 20 and 30 min, respectively. When compared with Pt catalyst made by conventional polyol method, it shows better long term durability due to the better Pt dispersion on the MWCNT surface.

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