Enhanced Desorption of Graphene-Supported Platinum-Based Catalysts
Abstract
In this work, using epitaxial graphene as a supporting material for the platinum-based catalysts used for electrochemical energy storage is presented. The epitaxy of graphene support layer was carried out by UV laser irradiation of graphene buffer layer on silicon carbide surface. Results showed that when platinum coverage increases, the available graphene surface area decreases, and the growth mechanism shifts toward nucleation on existing clusters. As well, the desorption spectra of deuterium on platinum clusters on graphene exhibit a peak at around 185°C, followed by a broad shoulder with an increasing signal. As platinum coverage increases, the peak at 185°C becomes more pronounced.
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