Co/CoO Nanoparticles Assembled on Graphene for Electrochemical Reduction of Oxygen


  • Supported by the U.S. Department of Energy, Office of Energy Efficiency, and Renewable Energy, Fuel Cell Technologies Program.


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Good support: A solution-phase self-assembly approach leads to Co/CoO core/shell nanoparticles deposited on graphene (G–Co/CoO NPs). Their catalytic activity for the oxygen reduction reaction in O2-saturated KOH solution depends on the thickness of the CoO shell (green in picture). The optimized G–Co/CoO NPs have a comparative activity and better stability than the commercial Pt NP catalyst supported on carbon (C–Pt).