Abstract
An efficient template-directed strategy is proposed in this study to synthesize nitrogen-doped carbon spheres supported Co nanoparticles (Co@NCS), using polydopamine and ZnCo-based zeolite imidazole framework as the precursors. Benefiting from the integration of abundantly catalytic active sites, highly electronic conductivity, and hierarchically porous structure, the obtained Co@NCS displays impressive electrocayalytic performances. In an alkaline electrolyte, the Co@NCS catalyst delivers a half-wave potential of 0.84 V for oxygen reduction reaction (ORR) and an overpotential of 430 mV for oxygen evolution reaction (OER) at 10 mA cm−2, along with a superb durability and methanol tolerance. In addition, the zinc-air battery with Co@NCS as electrode catalyst affords a high specific capacity/power density as well as an intriguing long-cycle discharge–charge property, exhibiting a promising application prospect in the field of renewable resources.
Published Version
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