Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/126236
Title: THE APPLICATION OF PT/MOS2 ELECTRODES FOR PROTON EXCHANGE MEMBRANE FUEL CELLS
Authors: HU YAN
Keywords: molybdenum disulfide,catalyst support, PEMFCs, Oxygen Reduction Reaction,catalytic activity, long-term stability
Issue Date: 22-Jan-2016
Abstract: 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
URI: http://scholarbank.nus.edu.sg/handle/10635/126236
Appears in Collections:Ph.D Theses (Open)

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