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초임계 함침법을 이용한 PEMFC용 Pt/Nafion 자가가습막의 제조 연구
신우균(Synn, Woo-Kyun),김화용(Kim, Hwa-Yong) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.11
Pt/Nafion self-humidifying membranes for Polymer Electrolyte Membrane Fuel Cell(PEMFC) were synthesized via supercritical-impregnation methods. The Nafion 112 membranes were impregnated with Pt(II)(acetylacetonate)₂ from a supercritical carbon dioxide (scCO₂) solution at 80?C and 30MPa. After the impregnation, the pressure decreased slowly by releasing CO₂. And the Pt-impregnated Nafion membrane was converted Pt deposited Nafion membrane by reducing agent, sodium borohydride (NaBH₄) with various concentrations under 50?C and 2 hours. The prepared Pt-impregnated Nafion (Pt/Nafion) composite membrane were investigated by Electron Prove Micro analysis (EPMA) and X-rat Diffraction analysis (XRD) which showed distribution of Pt particle and Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) a which revealed morphology of surface of Pt/Nafion composite membrane. The performance of the Pt/Nafion 112 membranes was examined in PEMFC as aself-humidifyin membranes using purpose-built equipment.