Synthesis and characterization of catalyst layers for direct methanol fuel cell applications
文献情報
M.-S. Löffler, B. Groß, H. Natter, R. Hempelmann, Th. Krajewski, J. Divisek
A preparation method for catalyst layers of platinum nanoparticles, as used in direct methanol fuel cells, based on pulsed electrochemical deposition within the three-phase boundary regions responsible for electrochemical reactions, was developed. A platinum precursor was brought into a carbon–Nafion layer and platinum was deposited in situ on the carbon surface. The size, size distribution and crystallinity of the deposited catalyst particles were determined by means of high-resolution transmission electron microscopy and X-ray diffraction measurements. The electrochemically active surface area of the deposited catalyst material was investigated by cyclic voltammetry, analysing the Pt–H oxidation peak.
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