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標題: Electrical enhancement of DMFC by Pt-M/C catalyst-assisted PVD
作者: Yao, K.S.
Chen, Y.C.
Chao, C.H.
Wang, W.F.
Lien, S.Y.
Shih, H.C.
Chen, T.L.
Weng, K.W.
關鍵字: DMFC;MPII;Ni;Fe;Cr;oxygen reduction;methanol;orr
Project: Thin Solid Films
期刊/報告no:: Thin Solid Films, Volume 518, Issue 24, Page(s) 7225-7228.
Direct methanol fuel cells (DMFC) are studied extensively owing to their simple cell configuration, high volume energy density, short start-up time and operation reliability. However, the major drawbacks include high production cost, catalyst and methanol crossover poisoning. This study presents a simple method for Pt-M/C catalyst preparation using a magnetron sputtering (MS) and metal-plasma ion implantation (MPII) technique. The Pt catalysts were sputtered onto a gas diffusion layer (GDL), followed by implanting Cr, Fe, Ni, and Mo catalysts using MPII (accelerating voltage is 20 kV and implantation fluence is 1 x 10(16) ions/cm(2)). The crystallinity and microstructure of the catalyst films were analyzed using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electronic microscopy (SEM) and transmission electronic microscopy (TEM). The cell performance was tested using potential stat/galvano station. The results indicate that the membrane electrode assembly for Pt-Ni/C, Pt-Fe/C and Pt-Cr/C catalysts can enhance DMFC cell performance, compared with traditional Pt/C and Pt-Ru/C. The maximum Pt-Ni/C power density is 2.4 mW/cm(2) with an open circuit voltage (OCV) 0.334 V when tested at a methanol concentration of 1 M. (C) 2010 Elsevier B.V. All rights reserved.
ISSN: 0040-6090
DOI: 10.1016/j.tsf.2010.04.080
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