New Composite Catalysts Based on Nitrogen- Doped Graphene and Nanoparticles for Advanced Electrocatalysis
Technical Report,01 May 2015,30 Apr 2018
Brown University Providence United States
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This project is to develop a new catalyst system that contains nanoparticles NPs and nitrogen doped graphene NG with enhanced electrocatalysis for important energy conversion reactions. The single sheet NG is prepared by high temperature 900C decomposition of graphene oxide GO and melamine. Themonodisperse NPs are prepared by high temperature up to 300C organic phase reaction. By mixing the dispersions of both NG and NPs, NPs can self-assemble on the NG surface, giving a monolayer array of NPs on NG. Alternatively, the NPs are assembled on a solid electrode surface via the novel water-air interface assembly method and are then covered with a layer of NG. The strong NP-NG interactions should make the NG-NP composite an ideal catalyst system for controlling charge transfer across the NP-NG interface and for rationalizing electrocatalysis on NP and NG surfaces. The project intends to use noble meal Pt or Au-based alloy NPs as model catalysts to study NG-NP interaction and its effect on enhancing NP or NG catalysis for electrochemical reactions. The final goal of the project is to develop Fe- or Co-based NP-NG composites with their catalysis comparable with or surpassing the noble metal catalysts for important electrochemical reduction and oxidation reactions.
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