Fabrication of heteroatom doped cobalt catalyst for oxygen reduction and evolution reactions in alkaline medium

The application of heteroatom doped cobalt (Ni@Co/C) prepared from a porous metal-organic framework as the cathode material for the rechargeable zinc-air batteries has been demonstrated. The Ni@Co/C-modified electrode showed an excellent catalytic activity toward oxidation-reduction reaction and oxygen evolution reactions. The Co/C catalysts, which were Co particle impregnated on graphitic carbon powders, were synthesized after the calcination of Co-3 (SDA)(3)(DMF)(2) precursor, and then Ni deposition (Ni@Co/C) was followed on it by chemical reduction. Linear sweep voltammetry measurement indicates that Ni@Co/C-H800, which had Ni particles on Co/C derived from MOF at 800 degrees C under N-2, exhibited excellent performance. The stable charging/discharging profiles at 20 mA cm(-2) of current were obtained for the 350 h in alkaline medium, suggesting Ni@Co/C-H800 as a potential candidate for oxidation-reduction and evolution reactions.