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• W1964371312 endingPage "B187" @default.
• W1964371312 startingPage "B187" @default.
• W1964371312 abstract "A series of platinum-coated underlayer materials, alumina, gold, titanium carbide, and titanium disilicide, deposited by a high throughput magnetron sputtering method have been investigated as cathode catalyst supports in fuel cells. Orthogonal thickness gradients of the underlayer materials ( planar equivalent) and the platinum top layer ( planar equivalent) made up the libraries. The resulting catalyst films were characterized by surface profilometry, X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy. The electrochemical properties of the catalyst composition spreads were investigated simultaneously in 64-electrode proton exchange membrane fuel cells with emphasis placed on the determination of the electrochemical surface area (ECSA) as a function of underlayer thickness and chemistry. The present study shows that gold and titanium disilicide used as underlayers on 3M's nanostructured thin film supports lead to a loss of ECSA during operation. Migration and surface accumulation were observed when gold was used as underlayer material. For titanium disilicide, alloying and the generation of platinum silicide phases occurred. Alumina and titanium carbide were found to be potentially acceptable underlayer materials as well as alternative support materials on the basis of their influence on the catalyst surface area." @default.
• W1964371312 created "2016-06-24" @default.
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• W1964371312 date "2010-01-01" @default.
• W1964371312 modified "2023-09-27" @default.
• W1964371312 title "Alternative Catalyst Supports Deposited on Nanostructured Thin Films for Proton Exchange Membrane Fuel Cells" @default.
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• W1964371312 doi "https://doi.org/10.1149/1.3261855" @default.
• W1964371312 hasPublicationYear "2010" @default.
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